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git/revision.c
Junio C Hamano f8828f9125 Merge branch 'ps/receive-use-only-advertised' 
"git receive-pack" used to use all the local refs as the boundary for
checking connectivity of the data "git push" sent, but now it uses
only the refs that it advertised to the pusher. In a repository with
the .hideRefs configuration, this reduces the resources needed to
perform the check.
cf. <221028.86bkpw805n.gmgdl@evledraar.gmail.com>
cf. <xmqqr0yrizqm.fsf@gitster.g>

* ps/receive-use-only-advertised:
  receive-pack: only use visible refs for connectivity check
  rev-parse: add `--exclude-hidden=` option
  revision: add new parameter to exclude hidden refs
  revision: introduce struct to handle exclusions
  revision: move together exclusion-related functions
  refs: get rid of global list of hidden refs
  refs: fix memory leak when parsing hideRefs config
2022-11-23 11:22:25 +09:00

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#include "cache.h"
#include "config.h"
#include "object-store.h"
#include "tag.h"
#include "blob.h"
#include "tree.h"
#include "commit.h"
#include "diff.h"
#include "diff-merges.h"
#include "refs.h"
#include "revision.h"
#include "repository.h"
#include "graph.h"
#include "grep.h"
#include "reflog-walk.h"
#include "patch-ids.h"
#include "decorate.h"
#include "log-tree.h"
#include "string-list.h"
#include "line-log.h"
#include "mailmap.h"
#include "commit-slab.h"
#include "dir.h"
#include "cache-tree.h"
#include "bisect.h"
#include "packfile.h"
#include "worktree.h"
#include "strvec.h"
#include "commit-reach.h"
#include "commit-graph.h"
#include "prio-queue.h"
#include "hashmap.h"
#include "utf8.h"
#include "bloom.h"
#include "json-writer.h"
#include "list-objects-filter-options.h"
#include "resolve-undo.h"
volatile show_early_output_fn_t show_early_output;
static const char *term_bad;
static const char *term_good;
implement_shared_commit_slab(revision_sources, char *);
static inline int want_ancestry(const struct rev_info *revs);
void show_object_with_name(FILE *out, struct object *obj, const char *name)
{
fprintf(out, "%s ", oid_to_hex(&obj->oid));
for (const char *p = name; *p && *p != '\n'; p++)
fputc(*p, out);
fputc('\n', out);
}
static void mark_blob_uninteresting(struct blob *blob)
{
if (!blob)
return;
if (blob->object.flags & UNINTERESTING)
return;
blob->object.flags |= UNINTERESTING;
}
static void mark_tree_contents_uninteresting(struct repository *r,
struct tree *tree)
{
struct tree_desc desc;
struct name_entry entry;
if (parse_tree_gently(tree, 1) < 0)
return;
init_tree_desc(&desc, tree->buffer, tree->size);
while (tree_entry(&desc, &entry)) {
switch (object_type(entry.mode)) {
case OBJ_TREE:
mark_tree_uninteresting(r, lookup_tree(r, &entry.oid));
break;
case OBJ_BLOB:
mark_blob_uninteresting(lookup_blob(r, &entry.oid));
break;
default:
/* Subproject commit - not in this repository */
break;
}
}
/*
* We don't care about the tree any more
* after it has been marked uninteresting.
*/
free_tree_buffer(tree);
}
void mark_tree_uninteresting(struct repository *r, struct tree *tree)
{
struct object *obj;
if (!tree)
return;
obj = &tree->object;
if (obj->flags & UNINTERESTING)
return;
obj->flags |= UNINTERESTING;
mark_tree_contents_uninteresting(r, tree);
}
struct path_and_oids_entry {
struct hashmap_entry ent;
char *path;
struct oidset trees;
};
static int path_and_oids_cmp(const void *hashmap_cmp_fn_data UNUSED,
const struct hashmap_entry *eptr,
const struct hashmap_entry *entry_or_key,
const void *keydata UNUSED)
{
const struct path_and_oids_entry *e1, *e2;
e1 = container_of(eptr, const struct path_and_oids_entry, ent);
e2 = container_of(entry_or_key, const struct path_and_oids_entry, ent);
return strcmp(e1->path, e2->path);
}
static void paths_and_oids_clear(struct hashmap *map)
{
struct hashmap_iter iter;
struct path_and_oids_entry *entry;
hashmap_for_each_entry(map, &iter, entry, ent /* member name */) {
oidset_clear(&entry->trees);
free(entry->path);
}
hashmap_clear_and_free(map, struct path_and_oids_entry, ent);
}
static void paths_and_oids_insert(struct hashmap *map,
const char *path,
const struct object_id *oid)
{
int hash = strhash(path);
struct path_and_oids_entry key;
struct path_and_oids_entry *entry;
hashmap_entry_init(&key.ent, hash);
/* use a shallow copy for the lookup */
key.path = (char *)path;
oidset_init(&key.trees, 0);
entry = hashmap_get_entry(map, &key, ent, NULL);
if (!entry) {
CALLOC_ARRAY(entry, 1);
hashmap_entry_init(&entry->ent, hash);
entry->path = xstrdup(key.path);
oidset_init(&entry->trees, 16);
hashmap_put(map, &entry->ent);
}
oidset_insert(&entry->trees, oid);
}
static void add_children_by_path(struct repository *r,
struct tree *tree,
struct hashmap *map)
{
struct tree_desc desc;
struct name_entry entry;
if (!tree)
return;
if (parse_tree_gently(tree, 1) < 0)
return;
init_tree_desc(&desc, tree->buffer, tree->size);
while (tree_entry(&desc, &entry)) {
switch (object_type(entry.mode)) {
case OBJ_TREE:
paths_and_oids_insert(map, entry.path, &entry.oid);
if (tree->object.flags & UNINTERESTING) {
struct tree *child = lookup_tree(r, &entry.oid);
if (child)
child->object.flags |= UNINTERESTING;
}
break;
case OBJ_BLOB:
if (tree->object.flags & UNINTERESTING) {
struct blob *child = lookup_blob(r, &entry.oid);
if (child)
child->object.flags |= UNINTERESTING;
}
break;
default:
/* Subproject commit - not in this repository */
break;
}
}
free_tree_buffer(tree);
}
void mark_trees_uninteresting_sparse(struct repository *r,
struct oidset *trees)
{
unsigned has_interesting = 0, has_uninteresting = 0;
struct hashmap map = HASHMAP_INIT(path_and_oids_cmp, NULL);
struct hashmap_iter map_iter;
struct path_and_oids_entry *entry;
struct object_id *oid;
struct oidset_iter iter;
oidset_iter_init(trees, &iter);
while ((!has_interesting || !has_uninteresting) &&
(oid = oidset_iter_next(&iter))) {
struct tree *tree = lookup_tree(r, oid);
if (!tree)
continue;
if (tree->object.flags & UNINTERESTING)
has_uninteresting = 1;
else
has_interesting = 1;
}
/* Do not walk unless we have both types of trees. */
if (!has_uninteresting || !has_interesting)
return;
oidset_iter_init(trees, &iter);
while ((oid = oidset_iter_next(&iter))) {
struct tree *tree = lookup_tree(r, oid);
add_children_by_path(r, tree, &map);
}
hashmap_for_each_entry(&map, &map_iter, entry, ent /* member name */)
mark_trees_uninteresting_sparse(r, &entry->trees);
paths_and_oids_clear(&map);
}
struct commit_stack {
struct commit **items;
size_t nr, alloc;
};
#define COMMIT_STACK_INIT { 0 }
static void commit_stack_push(struct commit_stack *stack, struct commit *commit)
{
ALLOC_GROW(stack->items, stack->nr + 1, stack->alloc);
stack->items[stack->nr++] = commit;
}
static struct commit *commit_stack_pop(struct commit_stack *stack)
{
return stack->nr ? stack->items[--stack->nr] : NULL;
}
static void commit_stack_clear(struct commit_stack *stack)
{
FREE_AND_NULL(stack->items);
stack->nr = stack->alloc = 0;
}
static void mark_one_parent_uninteresting(struct rev_info *revs, struct commit *commit,
struct commit_stack *pending)
{
struct commit_list *l;
if (commit->object.flags & UNINTERESTING)
return;
commit->object.flags |= UNINTERESTING;
/*
* Normally we haven't parsed the parent
* yet, so we won't have a parent of a parent
* here. However, it may turn out that we've
* reached this commit some other way (where it
* wasn't uninteresting), in which case we need
* to mark its parents recursively too..
*/
for (l = commit->parents; l; l = l->next) {
commit_stack_push(pending, l->item);
if (revs && revs->exclude_first_parent_only)
break;
}
}
void mark_parents_uninteresting(struct rev_info *revs, struct commit *commit)
{
struct commit_stack pending = COMMIT_STACK_INIT;
struct commit_list *l;
for (l = commit->parents; l; l = l->next) {
mark_one_parent_uninteresting(revs, l->item, &pending);
if (revs && revs->exclude_first_parent_only)
break;
}
while (pending.nr > 0)
mark_one_parent_uninteresting(revs, commit_stack_pop(&pending),
&pending);
commit_stack_clear(&pending);
}
static void add_pending_object_with_path(struct rev_info *revs,
struct object *obj,
const char *name, unsigned mode,
const char *path)
{
struct interpret_branch_name_options options = { 0 };
if (!obj)
return;
if (revs->no_walk && (obj->flags & UNINTERESTING))
revs->no_walk = 0;
if (revs->reflog_info && obj->type == OBJ_COMMIT) {
struct strbuf buf = STRBUF_INIT;
size_t namelen = strlen(name);
int len = interpret_branch_name(name, namelen, &buf, &options);
if (0 < len && len < namelen && buf.len)
strbuf_addstr(&buf, name + len);
add_reflog_for_walk(revs->reflog_info,
(struct commit *)obj,
buf.buf[0] ? buf.buf: name);
strbuf_release(&buf);
return; /* do not add the commit itself */
}
add_object_array_with_path(obj, name, &revs->pending, mode, path);
}
static void add_pending_object_with_mode(struct rev_info *revs,
struct object *obj,
const char *name, unsigned mode)
{
add_pending_object_with_path(revs, obj, name, mode, NULL);
}
void add_pending_object(struct rev_info *revs,
struct object *obj, const char *name)
{
add_pending_object_with_mode(revs, obj, name, S_IFINVALID);
}
void add_head_to_pending(struct rev_info *revs)
{
struct object_id oid;
struct object *obj;
if (get_oid("HEAD", &oid))
return;
obj = parse_object(revs->repo, &oid);
if (!obj)
return;
add_pending_object(revs, obj, "HEAD");
}
static struct object *get_reference(struct rev_info *revs, const char *name,
const struct object_id *oid,
unsigned int flags)
{
struct object *object;
object = parse_object_with_flags(revs->repo, oid,
revs->verify_objects ? 0 :
PARSE_OBJECT_SKIP_HASH_CHECK);
if (!object) {
if (revs->ignore_missing)
return object;
if (revs->exclude_promisor_objects && is_promisor_object(oid))
return NULL;
die("bad object %s", name);
}
object->flags |= flags;
return object;
}
void add_pending_oid(struct rev_info *revs, const char *name,
const struct object_id *oid, unsigned int flags)
{
struct object *object = get_reference(revs, name, oid, flags);
add_pending_object(revs, object, name);
}
static struct commit *handle_commit(struct rev_info *revs,
struct object_array_entry *entry)
{
struct object *object = entry->item;
const char *name = entry->name;
const char *path = entry->path;
unsigned int mode = entry->mode;
unsigned long flags = object->flags;
/*
* Tag object? Look what it points to..
*/
while (object->type == OBJ_TAG) {
struct tag *tag = (struct tag *) object;
if (revs->tag_objects && !(flags & UNINTERESTING))
add_pending_object(revs, object, tag->tag);
object = parse_object(revs->repo, get_tagged_oid(tag));
if (!object) {
if (revs->ignore_missing_links || (flags & UNINTERESTING))
return NULL;
if (revs->exclude_promisor_objects &&
is_promisor_object(&tag->tagged->oid))
return NULL;
die("bad object %s", oid_to_hex(&tag->tagged->oid));
}
object->flags |= flags;
/*
* We'll handle the tagged object by looping or dropping
* through to the non-tag handlers below. Do not
* propagate path data from the tag's pending entry.
*/
path = NULL;
mode = 0;
}
/*
* Commit object? Just return it, we'll do all the complex
* reachability crud.
*/
if (object->type == OBJ_COMMIT) {
struct commit *commit = (struct commit *)object;
if (repo_parse_commit(revs->repo, commit) < 0)
die("unable to parse commit %s", name);
if (flags & UNINTERESTING) {
mark_parents_uninteresting(revs, commit);
if (!revs->topo_order || !generation_numbers_enabled(the_repository))
revs->limited = 1;
}
if (revs->sources) {
char **slot = revision_sources_at(revs->sources, commit);
if (!*slot)
*slot = xstrdup(name);
}
return commit;
}
/*
* Tree object? Either mark it uninteresting, or add it
* to the list of objects to look at later..
*/
if (object->type == OBJ_TREE) {
struct tree *tree = (struct tree *)object;
if (!revs->tree_objects)
return NULL;
if (flags & UNINTERESTING) {
mark_tree_contents_uninteresting(revs->repo, tree);
return NULL;
}
add_pending_object_with_path(revs, object, name, mode, path);
return NULL;
}
/*
* Blob object? You know the drill by now..
*/
if (object->type == OBJ_BLOB) {
if (!revs->blob_objects)
return NULL;
if (flags & UNINTERESTING)
return NULL;
add_pending_object_with_path(revs, object, name, mode, path);
return NULL;
}
die("%s is unknown object", name);
}
static int everybody_uninteresting(struct commit_list *orig,
struct commit **interesting_cache)
{
struct commit_list *list = orig;
if (*interesting_cache) {
struct commit *commit = *interesting_cache;
if (!(commit->object.flags & UNINTERESTING))
return 0;
}
while (list) {
struct commit *commit = list->item;
list = list->next;
if (commit->object.flags & UNINTERESTING)
continue;
*interesting_cache = commit;
return 0;
}
return 1;
}
/*
* A definition of "relevant" commit that we can use to simplify limited graphs
* by eliminating side branches.
*
* A "relevant" commit is one that is !UNINTERESTING (ie we are including it
* in our list), or that is a specified BOTTOM commit. Then after computing
* a limited list, during processing we can generally ignore boundary merges
* coming from outside the graph, (ie from irrelevant parents), and treat
* those merges as if they were single-parent. TREESAME is defined to consider
* only relevant parents, if any. If we are TREESAME to our on-graph parents,
* we don't care if we were !TREESAME to non-graph parents.
*
* Treating bottom commits as relevant ensures that a limited graph's
* connection to the actual bottom commit is not viewed as a side branch, but
* treated as part of the graph. For example:
*
* ....Z...A---X---o---o---B
* . /
* W---Y
*
* When computing "A..B", the A-X connection is at least as important as
* Y-X, despite A being flagged UNINTERESTING.
*
* And when computing --ancestry-path "A..B", the A-X connection is more
* important than Y-X, despite both A and Y being flagged UNINTERESTING.
*/
static inline int relevant_commit(struct commit *commit)
{
return (commit->object.flags & (UNINTERESTING | BOTTOM)) != UNINTERESTING;
}
/*
* Return a single relevant commit from a parent list. If we are a TREESAME
* commit, and this selects one of our parents, then we can safely simplify to
* that parent.
*/
static struct commit *one_relevant_parent(const struct rev_info *revs,
struct commit_list *orig)
{
struct commit_list *list = orig;
struct commit *relevant = NULL;
if (!orig)
return NULL;
/*
* For 1-parent commits, or if first-parent-only, then return that
* first parent (even if not "relevant" by the above definition).
* TREESAME will have been set purely on that parent.
*/
if (revs->first_parent_only || !orig->next)
return orig->item;
/*
* For multi-parent commits, identify a sole relevant parent, if any.
* If we have only one relevant parent, then TREESAME will be set purely
* with regard to that parent, and we can simplify accordingly.
*
* If we have more than one relevant parent, or no relevant parents
* (and multiple irrelevant ones), then we can't select a parent here
* and return NULL.
*/
while (list) {
struct commit *commit = list->item;
list = list->next;
if (relevant_commit(commit)) {
if (relevant)
return NULL;
relevant = commit;
}
}
return relevant;
}
/*
* The goal is to get REV_TREE_NEW as the result only if the
* diff consists of all '+' (and no other changes), REV_TREE_OLD
* if the whole diff is removal of old data, and otherwise
* REV_TREE_DIFFERENT (of course if the trees are the same we
* want REV_TREE_SAME).
*
* The only time we care about the distinction is when
* remove_empty_trees is in effect, in which case we care only about
* whether the whole change is REV_TREE_NEW, or if there's another type
* of change. Which means we can stop the diff early in either of these
* cases:
*
* 1. We're not using remove_empty_trees at all.
*
* 2. We saw anything except REV_TREE_NEW.
*/
#define REV_TREE_SAME 0
#define REV_TREE_NEW 1 /* Only new files */
#define REV_TREE_OLD 2 /* Only files removed */
#define REV_TREE_DIFFERENT 3 /* Mixed changes */
static int tree_difference = REV_TREE_SAME;
static void file_add_remove(struct diff_options *options,
int addremove, unsigned mode,
const struct object_id *oid,
int oid_valid,
const char *fullpath, unsigned dirty_submodule)
{
int diff = addremove == '+' ? REV_TREE_NEW : REV_TREE_OLD;
struct rev_info *revs = options->change_fn_data;
tree_difference |= diff;
if (!revs->remove_empty_trees || tree_difference != REV_TREE_NEW)
options->flags.has_changes = 1;
}
static void file_change(struct diff_options *options,
unsigned old_mode, unsigned new_mode,
const struct object_id *old_oid,
const struct object_id *new_oid,
int old_oid_valid, int new_oid_valid,
const char *fullpath,
unsigned old_dirty_submodule, unsigned new_dirty_submodule)
{
tree_difference = REV_TREE_DIFFERENT;
options->flags.has_changes = 1;
}
static int bloom_filter_atexit_registered;
static unsigned int count_bloom_filter_maybe;
static unsigned int count_bloom_filter_definitely_not;
static unsigned int count_bloom_filter_false_positive;
static unsigned int count_bloom_filter_not_present;
static void trace2_bloom_filter_statistics_atexit(void)
{
struct json_writer jw = JSON_WRITER_INIT;
jw_object_begin(&jw, 0);
jw_object_intmax(&jw, "filter_not_present", count_bloom_filter_not_present);
jw_object_intmax(&jw, "maybe", count_bloom_filter_maybe);
jw_object_intmax(&jw, "definitely_not", count_bloom_filter_definitely_not);
jw_object_intmax(&jw, "false_positive", count_bloom_filter_false_positive);
jw_end(&jw);
trace2_data_json("bloom", the_repository, "statistics", &jw);
jw_release(&jw);
}
static int forbid_bloom_filters(struct pathspec *spec)
{
if (spec->has_wildcard)
return 1;
if (spec->nr > 1)
return 1;
if (spec->magic & ~PATHSPEC_LITERAL)
return 1;
if (spec->nr && (spec->items[0].magic & ~PATHSPEC_LITERAL))
return 1;
return 0;
}
static void prepare_to_use_bloom_filter(struct rev_info *revs)
{
struct pathspec_item *pi;
char *path_alloc = NULL;
const char *path, *p;
size_t len;
int path_component_nr = 1;
if (!revs->commits)
return;
if (forbid_bloom_filters(&revs->prune_data))
return;
repo_parse_commit(revs->repo, revs->commits->item);
revs->bloom_filter_settings = get_bloom_filter_settings(revs->repo);
if (!revs->bloom_filter_settings)
return;
if (!revs->pruning.pathspec.nr)
return;
pi = &revs->pruning.pathspec.items[0];
/* remove single trailing slash from path, if needed */
if (pi->len > 0 && pi->match[pi->len - 1] == '/') {
path_alloc = xmemdupz(pi->match, pi->len - 1);
path = path_alloc;
} else
path = pi->match;
len = strlen(path);
if (!len) {
revs->bloom_filter_settings = NULL;
free(path_alloc);
return;
}
p = path;
while (*p) {
/*
* At this point, the path is normalized to use Unix-style
* path separators. This is required due to how the
* changed-path Bloom filters store the paths.
*/
if (*p == '/')
path_component_nr++;
p++;
}
revs->bloom_keys_nr = path_component_nr;
ALLOC_ARRAY(revs->bloom_keys, revs->bloom_keys_nr);
fill_bloom_key(path, len, &revs->bloom_keys[0],
revs->bloom_filter_settings);
path_component_nr = 1;
p = path + len - 1;
while (p > path) {
if (*p == '/')
fill_bloom_key(path, p - path,
&revs->bloom_keys[path_component_nr++],
revs->bloom_filter_settings);
p--;
}
if (trace2_is_enabled() && !bloom_filter_atexit_registered) {
atexit(trace2_bloom_filter_statistics_atexit);
bloom_filter_atexit_registered = 1;
}
free(path_alloc);
}
static int check_maybe_different_in_bloom_filter(struct rev_info *revs,
struct commit *commit)
{
struct bloom_filter *filter;
int result = 1, j;
if (!revs->repo->objects->commit_graph)
return -1;
if (commit_graph_generation(commit) == GENERATION_NUMBER_INFINITY)
return -1;
filter = get_bloom_filter(revs->repo, commit);
if (!filter) {
count_bloom_filter_not_present++;
return -1;
}
for (j = 0; result && j < revs->bloom_keys_nr; j++) {
result = bloom_filter_contains(filter,
&revs->bloom_keys[j],
revs->bloom_filter_settings);
}
if (result)
count_bloom_filter_maybe++;
else
count_bloom_filter_definitely_not++;
return result;
}
static int rev_compare_tree(struct rev_info *revs,
struct commit *parent, struct commit *commit, int nth_parent)
{
struct tree *t1 = get_commit_tree(parent);
struct tree *t2 = get_commit_tree(commit);
int bloom_ret = 1;
if (!t1)
return REV_TREE_NEW;
if (!t2)
return REV_TREE_OLD;
if (revs->simplify_by_decoration) {
/*
* If we are simplifying by decoration, then the commit
* is worth showing if it has a tag pointing at it.
*/
if (get_name_decoration(&commit->object))
return REV_TREE_DIFFERENT;
/*
* A commit that is not pointed by a tag is uninteresting
* if we are not limited by path. This means that you will
* see the usual "commits that touch the paths" plus any
* tagged commit by specifying both --simplify-by-decoration
* and pathspec.
*/
if (!revs->prune_data.nr)
return REV_TREE_SAME;
}
if (revs->bloom_keys_nr && !nth_parent) {
bloom_ret = check_maybe_different_in_bloom_filter(revs, commit);
if (bloom_ret == 0)
return REV_TREE_SAME;
}
tree_difference = REV_TREE_SAME;
revs->pruning.flags.has_changes = 0;
diff_tree_oid(&t1->object.oid, &t2->object.oid, "", &revs->pruning);
if (!nth_parent)
if (bloom_ret == 1 && tree_difference == REV_TREE_SAME)
count_bloom_filter_false_positive++;
return tree_difference;
}
static int rev_same_tree_as_empty(struct rev_info *revs, struct commit *commit)
{
struct tree *t1 = get_commit_tree(commit);
if (!t1)
return 0;
tree_difference = REV_TREE_SAME;
revs->pruning.flags.has_changes = 0;
diff_tree_oid(NULL, &t1->object.oid, "", &revs->pruning);
return tree_difference == REV_TREE_SAME;
}
struct treesame_state {
unsigned int nparents;
unsigned char treesame[FLEX_ARRAY];
};
static struct treesame_state *initialise_treesame(struct rev_info *revs, struct commit *commit)
{
unsigned n = commit_list_count(commit->parents);
struct treesame_state *st = xcalloc(1, st_add(sizeof(*st), n));
st->nparents = n;
add_decoration(&revs->treesame, &commit->object, st);
return st;
}
/*
* Must be called immediately after removing the nth_parent from a commit's
* parent list, if we are maintaining the per-parent treesame[] decoration.
* This does not recalculate the master TREESAME flag - update_treesame()
* should be called to update it after a sequence of treesame[] modifications
* that may have affected it.
*/
static int compact_treesame(struct rev_info *revs, struct commit *commit, unsigned nth_parent)
{
struct treesame_state *st;
int old_same;
if (!commit->parents) {
/*
* Have just removed the only parent from a non-merge.
* Different handling, as we lack decoration.
*/
if (nth_parent != 0)
die("compact_treesame %u", nth_parent);
old_same = !!(commit->object.flags & TREESAME);
if (rev_same_tree_as_empty(revs, commit))
commit->object.flags |= TREESAME;
else
commit->object.flags &= ~TREESAME;
return old_same;
}
st = lookup_decoration(&revs->treesame, &commit->object);
if (!st || nth_parent >= st->nparents)
die("compact_treesame %u", nth_parent);
old_same = st->treesame[nth_parent];
memmove(st->treesame + nth_parent,
st->treesame + nth_parent + 1,
st->nparents - nth_parent - 1);
/*
* If we've just become a non-merge commit, update TREESAME
* immediately, and remove the no-longer-needed decoration.
* If still a merge, defer update until update_treesame().
*/
if (--st->nparents == 1) {
if (commit->parents->next)
die("compact_treesame parents mismatch");
if (st->treesame[0] && revs->dense)
commit->object.flags |= TREESAME;
else
commit->object.flags &= ~TREESAME;
free(add_decoration(&revs->treesame, &commit->object, NULL));
}
return old_same;
}
static unsigned update_treesame(struct rev_info *revs, struct commit *commit)
{
if (commit->parents && commit->parents->next) {
unsigned n;
struct treesame_state *st;
struct commit_list *p;
unsigned relevant_parents;
unsigned relevant_change, irrelevant_change;
st = lookup_decoration(&revs->treesame, &commit->object);
if (!st)
die("update_treesame %s", oid_to_hex(&commit->object.oid));
relevant_parents = 0;
relevant_change = irrelevant_change = 0;
for (p = commit->parents, n = 0; p; n++, p = p->next) {
if (relevant_commit(p->item)) {
relevant_change |= !st->treesame[n];
relevant_parents++;
} else
irrelevant_change |= !st->treesame[n];
}
if (relevant_parents ? relevant_change : irrelevant_change)
commit->object.flags &= ~TREESAME;
else
commit->object.flags |= TREESAME;
}
return commit->object.flags & TREESAME;
}
static inline int limiting_can_increase_treesame(const struct rev_info *revs)
{
/*
* TREESAME is irrelevant unless prune && dense;
* if simplify_history is set, we can't have a mixture of TREESAME and
* !TREESAME INTERESTING parents (and we don't have treesame[]
* decoration anyway);
* if first_parent_only is set, then the TREESAME flag is locked
* against the first parent (and again we lack treesame[] decoration).
*/
return revs->prune && revs->dense &&
!revs->simplify_history &&
!revs->first_parent_only;
}
static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
{
struct commit_list **pp, *parent;
struct treesame_state *ts = NULL;
int relevant_change = 0, irrelevant_change = 0;
int relevant_parents, nth_parent;
/*
* If we don't do pruning, everything is interesting
*/
if (!revs->prune)
return;
if (!get_commit_tree(commit))
return;
if (!commit->parents) {
if (rev_same_tree_as_empty(revs, commit))
commit->object.flags |= TREESAME;
return;
}
/*
* Normal non-merge commit? If we don't want to make the
* history dense, we consider it always to be a change..
*/
if (!revs->dense && !commit->parents->next)
return;
for (pp = &commit->parents, nth_parent = 0, relevant_parents = 0;
(parent = *pp) != NULL;
pp = &parent->next, nth_parent++) {
struct commit *p = parent->item;
if (relevant_commit(p))
relevant_parents++;
if (nth_parent == 1) {
/*
* This our second loop iteration - so we now know
* we're dealing with a merge.
*
* Do not compare with later parents when we care only about
* the first parent chain, in order to avoid derailing the
* traversal to follow a side branch that brought everything
* in the path we are limited to by the pathspec.
*/
if (revs->first_parent_only)
break;
/*
* If this will remain a potentially-simplifiable
* merge, remember per-parent treesame if needed.
* Initialise the array with the comparison from our
* first iteration.
*/
if (revs->treesame.name &&
!revs->simplify_history &&
!(commit->object.flags & UNINTERESTING)) {
ts = initialise_treesame(revs, commit);
if (!(irrelevant_change || relevant_change))
ts->treesame[0] = 1;
}
}
if (repo_parse_commit(revs->repo, p) < 0)
die("cannot simplify commit %s (because of %s)",
oid_to_hex(&commit->object.oid),
oid_to_hex(&p->object.oid));
switch (rev_compare_tree(revs, p, commit, nth_parent)) {
case REV_TREE_SAME:
if (!revs->simplify_history || !relevant_commit(p)) {
/* Even if a merge with an uninteresting
* side branch brought the entire change
* we are interested in, we do not want
* to lose the other branches of this
* merge, so we just keep going.
*/
if (ts)
ts->treesame[nth_parent] = 1;
continue;
}
parent->next = NULL;
commit->parents = parent;
/*
* A merge commit is a "diversion" if it is not
* TREESAME to its first parent but is TREESAME
* to a later parent. In the simplified history,
* we "divert" the history walk to the later
* parent. These commits are shown when "show_pulls"
* is enabled, so do not mark the object as
* TREESAME here.
*/
if (!revs->show_pulls || !nth_parent)
commit->object.flags |= TREESAME;
return;
case REV_TREE_NEW:
if (revs->remove_empty_trees &&
rev_same_tree_as_empty(revs, p)) {
/* We are adding all the specified
* paths from this parent, so the
* history beyond this parent is not
* interesting. Remove its parents
* (they are grandparents for us).
* IOW, we pretend this parent is a
* "root" commit.
*/
if (repo_parse_commit(revs->repo, p) < 0)
die("cannot simplify commit %s (invalid %s)",
oid_to_hex(&commit->object.oid),
oid_to_hex(&p->object.oid));
p->parents = NULL;
}
/* fallthrough */
case REV_TREE_OLD:
case REV_TREE_DIFFERENT:
if (relevant_commit(p))
relevant_change = 1;
else
irrelevant_change = 1;
if (!nth_parent)
commit->object.flags |= PULL_MERGE;
continue;
}
die("bad tree compare for commit %s", oid_to_hex(&commit->object.oid));
}
/*
* TREESAME is straightforward for single-parent commits. For merge
* commits, it is most useful to define it so that "irrelevant"
* parents cannot make us !TREESAME - if we have any relevant
* parents, then we only consider TREESAMEness with respect to them,
* allowing irrelevant merges from uninteresting branches to be
* simplified away. Only if we have only irrelevant parents do we
* base TREESAME on them. Note that this logic is replicated in
* update_treesame, which should be kept in sync.
*/
if (relevant_parents ? !relevant_change : !irrelevant_change)
commit->object.flags |= TREESAME;
}
static int process_parents(struct rev_info *revs, struct commit *commit,
struct commit_list **list, struct prio_queue *queue)
{
struct commit_list *parent = commit->parents;
unsigned pass_flags;
if (commit->object.flags & ADDED)
return 0;
commit->object.flags |= ADDED;
if (revs->include_check &&
!revs->include_check(commit, revs->include_check_data))
return 0;
/*
* If the commit is uninteresting, don't try to
* prune parents - we want the maximal uninteresting
* set.
*
* Normally we haven't parsed the parent
* yet, so we won't have a parent of a parent
* here. However, it may turn out that we've
* reached this commit some other way (where it
* wasn't uninteresting), in which case we need
* to mark its parents recursively too..
*/
if (commit->object.flags & UNINTERESTING) {
while (parent) {
struct commit *p = parent->item;
parent = parent->next;
if (p)
p->object.flags |= UNINTERESTING;
if (repo_parse_commit_gently(revs->repo, p, 1) < 0)
continue;
if (p->parents)
mark_parents_uninteresting(revs, p);
if (p->object.flags & SEEN)
continue;
p->object.flags |= (SEEN | NOT_USER_GIVEN);
if (list)
commit_list_insert_by_date(p, list);
if (queue)
prio_queue_put(queue, p);
if (revs->exclude_first_parent_only)
break;
}
return 0;
}
/*
* Ok, the commit wasn't uninteresting. Try to
* simplify the commit history and find the parent
* that has no differences in the path set if one exists.
*/
try_to_simplify_commit(revs, commit);
if (revs->no_walk)
return 0;
pass_flags = (commit->object.flags & (SYMMETRIC_LEFT | ANCESTRY_PATH));
for (parent = commit->parents; parent; parent = parent->next) {
struct commit *p = parent->item;
int gently = revs->ignore_missing_links ||
revs->exclude_promisor_objects;
if (repo_parse_commit_gently(revs->repo, p, gently) < 0) {
if (revs->exclude_promisor_objects &&
is_promisor_object(&p->object.oid)) {
if (revs->first_parent_only)
break;
continue;
}
return -1;
}
if (revs->sources) {
char **slot = revision_sources_at(revs->sources, p);
if (!*slot)
*slot = *revision_sources_at(revs->sources, commit);
}
p->object.flags |= pass_flags;
if (!(p->object.flags & SEEN)) {
p->object.flags |= (SEEN | NOT_USER_GIVEN);
if (list)
commit_list_insert_by_date(p, list);
if (queue)
prio_queue_put(queue, p);
}
if (revs->first_parent_only)
break;
}
return 0;
}
static void cherry_pick_list(struct commit_list *list, struct rev_info *revs)
{
struct commit_list *p;
int left_count = 0, right_count = 0;
int left_first;
struct patch_ids ids;
unsigned cherry_flag;
/* First count the commits on the left and on the right */
for (p = list; p; p = p->next) {
struct commit *commit = p->item;
unsigned flags = commit->object.flags;
if (flags & BOUNDARY)
;
else if (flags & SYMMETRIC_LEFT)
left_count++;
else
right_count++;
}
if (!left_count || !right_count)
return;
left_first = left_count < right_count;
init_patch_ids(revs->repo, &ids);
ids.diffopts.pathspec = revs->diffopt.pathspec;
/* Compute patch-ids for one side */
for (p = list; p; p = p->next) {
struct commit *commit = p->item;
unsigned flags = commit->object.flags;
if (flags & BOUNDARY)
continue;
/*
* If we have fewer left, left_first is set and we omit
* commits on the right branch in this loop. If we have
* fewer right, we skip the left ones.
*/
if (left_first != !!(flags & SYMMETRIC_LEFT))
continue;
add_commit_patch_id(commit, &ids);
}
/* either cherry_mark or cherry_pick are true */
cherry_flag = revs->cherry_mark ? PATCHSAME : SHOWN;
/* Check the other side */
for (p = list; p; p = p->next) {
struct commit *commit = p->item;
struct patch_id *id;
unsigned flags = commit->object.flags;
if (flags & BOUNDARY)
continue;
/*
* If we have fewer left, left_first is set and we omit
* commits on the left branch in this loop.
*/
if (left_first == !!(flags & SYMMETRIC_LEFT))
continue;
/*
* Have we seen the same patch id?
*/
id = patch_id_iter_first(commit, &ids);
if (!id)
continue;
commit->object.flags |= cherry_flag;
do {
id->commit->object.flags |= cherry_flag;
} while ((id = patch_id_iter_next(id, &ids)));
}
free_patch_ids(&ids);
}
/* How many extra uninteresting commits we want to see.. */
#define SLOP 5
static int still_interesting(struct commit_list *src, timestamp_t date, int slop,
struct commit **interesting_cache)
{
/*
* No source list at all? We're definitely done..
*/
if (!src)
return 0;
/*
* Does the destination list contain entries with a date
* before the source list? Definitely _not_ done.
*/
if (date <= src->item->date)
return SLOP;
/*
* Does the source list still have interesting commits in
* it? Definitely not done..
*/
if (!everybody_uninteresting(src, interesting_cache))
return SLOP;
/* Ok, we're closing in.. */
return slop-1;
}
/*
* "rev-list --ancestry-path=C_0 [--ancestry-path=C_1 ...] A..B"
* computes commits that are ancestors of B but not ancestors of A but
* further limits the result to those that have any of C in their
* ancestry path (i.e. are either ancestors of any of C, descendants
* of any of C, or are any of C). If --ancestry-path is specified with
* no commit, we use all bottom commits for C.
*
* Before this function is called, ancestors of C will have already
* been marked with ANCESTRY_PATH previously.
*
* This takes the list of bottom commits and the result of "A..B"
* without --ancestry-path, and limits the latter further to the ones
* that have any of C in their ancestry path. Since the ancestors of C
* have already been marked (a prerequisite of this function), we just
* need to mark the descendants, then exclude any commit that does not
* have any of these marks.
*/
static void limit_to_ancestry(struct commit_list *bottoms, struct commit_list *list)
{
struct commit_list *p;
struct commit_list *rlist = NULL;
int made_progress;
/*
* Reverse the list so that it will be likely that we would
* process parents before children.
*/
for (p = list; p; p = p->next)
commit_list_insert(p->item, &rlist);
for (p = bottoms; p; p = p->next)
p->item->object.flags |= TMP_MARK;
/*
* Mark the ones that can reach bottom commits in "list",
* in a bottom-up fashion.
*/
do {
made_progress = 0;
for (p = rlist; p; p = p->next) {
struct commit *c = p->item;
struct commit_list *parents;
if (c->object.flags & (TMP_MARK | UNINTERESTING))
continue;
for (parents = c->parents;
parents;
parents = parents->next) {
if (!(parents->item->object.flags & TMP_MARK))
continue;
c->object.flags |= TMP_MARK;
made_progress = 1;
break;
}
}
} while (made_progress);
/*
* NEEDSWORK: decide if we want to remove parents that are
* not marked with TMP_MARK from commit->parents for commits
* in the resulting list. We may not want to do that, though.
*/
/*
* The ones that are not marked with either TMP_MARK or
* ANCESTRY_PATH are uninteresting
*/
for (p = list; p; p = p->next) {
struct commit *c = p->item;
if (c->object.flags & (TMP_MARK | ANCESTRY_PATH))
continue;
c->object.flags |= UNINTERESTING;
}
/* We are done with TMP_MARK and ANCESTRY_PATH */
for (p = list; p; p = p->next)
p->item->object.flags &= ~(TMP_MARK | ANCESTRY_PATH);
for (p = bottoms; p; p = p->next)
p->item->object.flags &= ~(TMP_MARK | ANCESTRY_PATH);
free_commit_list(rlist);
}
/*
* Before walking the history, add the set of "negative" refs the
* caller has asked to exclude to the bottom list.
*
* This is used to compute "rev-list --ancestry-path A..B", as we need
* to filter the result of "A..B" further to the ones that can actually
* reach A.
*/
static void collect_bottom_commits(struct commit_list *list,
struct commit_list **bottom)
{
struct commit_list *elem;
for (elem = list; elem; elem = elem->next)
if (elem->item->object.flags & BOTTOM)
commit_list_insert(elem->item, bottom);
}
/* Assumes either left_only or right_only is set */
static void limit_left_right(struct commit_list *list, struct rev_info *revs)
{
struct commit_list *p;
for (p = list; p; p = p->next) {
struct commit *commit = p->item;
if (revs->right_only) {
if (commit->object.flags & SYMMETRIC_LEFT)
commit->object.flags |= SHOWN;
} else /* revs->left_only is set */
if (!(commit->object.flags & SYMMETRIC_LEFT))
commit->object.flags |= SHOWN;
}
}
static int limit_list(struct rev_info *revs)
{
int slop = SLOP;
timestamp_t date = TIME_MAX;
struct commit_list *original_list = revs->commits;
struct commit_list *newlist = NULL;
struct commit_list **p = &newlist;
struct commit *interesting_cache = NULL;
if (revs->ancestry_path_implicit_bottoms) {
collect_bottom_commits(original_list,
&revs->ancestry_path_bottoms);
if (!revs->ancestry_path_bottoms)
die("--ancestry-path given but there are no bottom commits");
}
while (original_list) {
struct commit *commit = pop_commit(&original_list);
struct object *obj = &commit->object;
show_early_output_fn_t show;
if (commit == interesting_cache)
interesting_cache = NULL;
if (revs->max_age != -1 && (commit->date < revs->max_age))
obj->flags |= UNINTERESTING;
if (process_parents(revs, commit, &original_list, NULL) < 0)
return -1;
if (obj->flags & UNINTERESTING) {
mark_parents_uninteresting(revs, commit);
slop = still_interesting(original_list, date, slop, &interesting_cache);
if (slop)
continue;
break;
}
if (revs->min_age != -1 && (commit->date > revs->min_age) &&
!revs->line_level_traverse)
continue;
if (revs->max_age_as_filter != -1 &&
(commit->date < revs->max_age_as_filter) && !revs->line_level_traverse)
continue;
date = commit->date;
p = &commit_list_insert(commit, p)->next;
show = show_early_output;
if (!show)
continue;
show(revs, newlist);
show_early_output = NULL;
}
if (revs->cherry_pick || revs->cherry_mark)
cherry_pick_list(newlist, revs);
if (revs->left_only || revs->right_only)
limit_left_right(newlist, revs);
if (revs->ancestry_path)
limit_to_ancestry(revs->ancestry_path_bottoms, newlist);
/*
* Check if any commits have become TREESAME by some of their parents
* becoming UNINTERESTING.
*/
if (limiting_can_increase_treesame(revs)) {
struct commit_list *list = NULL;
for (list = newlist; list; list = list->next) {
struct commit *c = list->item;
if (c->object.flags & (UNINTERESTING | TREESAME))
continue;
update_treesame(revs, c);
}
}
free_commit_list(original_list);
revs->commits = newlist;
return 0;
}
/*
* Add an entry to refs->cmdline with the specified information.
* *name is copied.
*/
static void add_rev_cmdline(struct rev_info *revs,
struct object *item,
const char *name,
int whence,
unsigned flags)
{
struct rev_cmdline_info *info = &revs->cmdline;
unsigned int nr = info->nr;
ALLOC_GROW(info->rev, nr + 1, info->alloc);
info->rev[nr].item = item;
info->rev[nr].name = xstrdup(name);
info->rev[nr].whence = whence;
info->rev[nr].flags = flags;
info->nr++;
}
static void add_rev_cmdline_list(struct rev_info *revs,
struct commit_list *commit_list,
int whence,
unsigned flags)
{
while (commit_list) {
struct object *object = &commit_list->item->object;
add_rev_cmdline(revs, object, oid_to_hex(&object->oid),
whence, flags);
commit_list = commit_list->next;
}
}
int ref_excluded(const struct ref_exclusions *exclusions, const char *path)
{
const char *stripped_path = strip_namespace(path);
struct string_list_item *item;
for_each_string_list_item(item, &exclusions->excluded_refs) {
if (!wildmatch(item->string, path, 0))
return 1;
}
if (ref_is_hidden(stripped_path, path, &exclusions->hidden_refs))
return 1;
return 0;
}
void init_ref_exclusions(struct ref_exclusions *exclusions)
{
struct ref_exclusions blank = REF_EXCLUSIONS_INIT;
memcpy(exclusions, &blank, sizeof(*exclusions));
}
void clear_ref_exclusions(struct ref_exclusions *exclusions)
{
string_list_clear(&exclusions->excluded_refs, 0);
string_list_clear(&exclusions->hidden_refs, 0);
exclusions->hidden_refs_configured = 0;
}
void add_ref_exclusion(struct ref_exclusions *exclusions, const char *exclude)
{
string_list_append(&exclusions->excluded_refs, exclude);
}
struct exclude_hidden_refs_cb {
struct ref_exclusions *exclusions;
const char *section;
};
static int hide_refs_config(const char *var, const char *value, void *cb_data)
{
struct exclude_hidden_refs_cb *cb = cb_data;
cb->exclusions->hidden_refs_configured = 1;
return parse_hide_refs_config(var, value, cb->section,
&cb->exclusions->hidden_refs);
}
void exclude_hidden_refs(struct ref_exclusions *exclusions, const char *section)
{
struct exclude_hidden_refs_cb cb;
if (strcmp(section, "receive") && strcmp(section, "uploadpack"))
die(_("unsupported section for hidden refs: %s"), section);
if (exclusions->hidden_refs_configured)
die(_("--exclude-hidden= passed more than once"));
cb.exclusions = exclusions;
cb.section = section;
git_config(hide_refs_config, &cb);
}
struct all_refs_cb {
int all_flags;
int warned_bad_reflog;
struct rev_info *all_revs;
const char *name_for_errormsg;
struct worktree *wt;
};
static int handle_one_ref(const char *path, const struct object_id *oid,
int flag UNUSED,
void *cb_data)
{
struct all_refs_cb *cb = cb_data;
struct object *object;
if (ref_excluded(&cb->all_revs->ref_excludes, path))
return 0;
object = get_reference(cb->all_revs, path, oid, cb->all_flags);
add_rev_cmdline(cb->all_revs, object, path, REV_CMD_REF, cb->all_flags);
add_pending_object(cb->all_revs, object, path);
return 0;
}
static void init_all_refs_cb(struct all_refs_cb *cb, struct rev_info *revs,
unsigned flags)
{
cb->all_revs = revs;
cb->all_flags = flags;
revs->rev_input_given = 1;
cb->wt = NULL;
}
static void handle_refs(struct ref_store *refs,
struct rev_info *revs, unsigned flags,
int (*for_each)(struct ref_store *, each_ref_fn, void *))
{
struct all_refs_cb cb;
if (!refs) {
/* this could happen with uninitialized submodules */
return;
}
init_all_refs_cb(&cb, revs, flags);
for_each(refs, handle_one_ref, &cb);
}
static void handle_one_reflog_commit(struct object_id *oid, void *cb_data)
{
struct all_refs_cb *cb = cb_data;
if (!is_null_oid(oid)) {
struct object *o = parse_object(cb->all_revs->repo, oid);
if (o) {
o->flags |= cb->all_flags;
/* ??? CMDLINEFLAGS ??? */
add_pending_object(cb->all_revs, o, "");
}
else if (!cb->warned_bad_reflog) {
warning("reflog of '%s' references pruned commits",
cb->name_for_errormsg);
cb->warned_bad_reflog = 1;
}
}
}
static int handle_one_reflog_ent(struct object_id *ooid, struct object_id *noid,
const char *email UNUSED,
timestamp_t timestamp UNUSED,
int tz UNUSED,
const char *message UNUSED,
void *cb_data)
{
handle_one_reflog_commit(ooid, cb_data);
handle_one_reflog_commit(noid, cb_data);
return 0;
}
static int handle_one_reflog(const char *refname_in_wt,
const struct object_id *oid UNUSED,
int flag UNUSED, void *cb_data)
{
struct all_refs_cb *cb = cb_data;
struct strbuf refname = STRBUF_INIT;
cb->warned_bad_reflog = 0;
strbuf_worktree_ref(cb->wt, &refname, refname_in_wt);
cb->name_for_errormsg = refname.buf;
refs_for_each_reflog_ent(get_main_ref_store(the_repository),
refname.buf,
handle_one_reflog_ent, cb_data);
strbuf_release(&refname);
return 0;
}
static void add_other_reflogs_to_pending(struct all_refs_cb *cb)
{
struct worktree **worktrees, **p;
worktrees = get_worktrees();
for (p = worktrees; *p; p++) {
struct worktree *wt = *p;
if (wt->is_current)
continue;
cb->wt = wt;
refs_for_each_reflog(get_worktree_ref_store(wt),
handle_one_reflog,
cb);
}
free_worktrees(worktrees);
}
void add_reflogs_to_pending(struct rev_info *revs, unsigned flags)
{
struct all_refs_cb cb;
cb.all_revs = revs;
cb.all_flags = flags;
cb.wt = NULL;
for_each_reflog(handle_one_reflog, &cb);
if (!revs->single_worktree)
add_other_reflogs_to_pending(&cb);
}
static void add_cache_tree(struct cache_tree *it, struct rev_info *revs,
struct strbuf *path, unsigned int flags)
{
size_t baselen = path->len;
int i;
if (it->entry_count >= 0) {
struct tree *tree = lookup_tree(revs->repo, &it->oid);
tree->object.flags |= flags;
add_pending_object_with_path(revs, &tree->object, "",
040000, path->buf);
}
for (i = 0; i < it->subtree_nr; i++) {
struct cache_tree_sub *sub = it->down[i];
strbuf_addf(path, "%s%s", baselen ? "/" : "", sub->name);
add_cache_tree(sub->cache_tree, revs, path, flags);
strbuf_setlen(path, baselen);
}
}
static void add_resolve_undo_to_pending(struct index_state *istate, struct rev_info *revs)
{
struct string_list_item *item;
struct string_list *resolve_undo = istate->resolve_undo;
if (!resolve_undo)
return;
for_each_string_list_item(item, resolve_undo) {
const char *path = item->string;
struct resolve_undo_info *ru = item->util;
int i;
if (!ru)
continue;
for (i = 0; i < 3; i++) {
struct blob *blob;
if (!ru->mode[i] || !S_ISREG(ru->mode[i]))
continue;
blob = lookup_blob(revs->repo, &ru->oid[i]);
if (!blob) {
warning(_("resolve-undo records `%s` which is missing"),
oid_to_hex(&ru->oid[i]));
continue;
}
add_pending_object_with_path(revs, &blob->object, "",
ru->mode[i], path);
}
}
}
static void do_add_index_objects_to_pending(struct rev_info *revs,
struct index_state *istate,
unsigned int flags)
{
int i;
/* TODO: audit for interaction with sparse-index. */
ensure_full_index(istate);
for (i = 0; i < istate->cache_nr; i++) {
struct cache_entry *ce = istate->cache[i];
struct blob *blob;
if (S_ISGITLINK(ce->ce_mode))
continue;
blob = lookup_blob(revs->repo, &ce->oid);
if (!blob)
die("unable to add index blob to traversal");
blob->object.flags |= flags;
add_pending_object_with_path(revs, &blob->object, "",
ce->ce_mode, ce->name);
}
if (istate->cache_tree) {
struct strbuf path = STRBUF_INIT;
add_cache_tree(istate->cache_tree, revs, &path, flags);
strbuf_release(&path);
}
add_resolve_undo_to_pending(istate, revs);
}
void add_index_objects_to_pending(struct rev_info *revs, unsigned int flags)
{
struct worktree **worktrees, **p;
repo_read_index(revs->repo);
do_add_index_objects_to_pending(revs, revs->repo->index, flags);
if (revs->single_worktree)
return;
worktrees = get_worktrees();
for (p = worktrees; *p; p++) {
struct worktree *wt = *p;
struct index_state istate = { NULL };
if (wt->is_current)
continue; /* current index already taken care of */
if (read_index_from(&istate,
worktree_git_path(wt, "index"),
get_worktree_git_dir(wt)) > 0)
do_add_index_objects_to_pending(revs, &istate, flags);
discard_index(&istate);
}
free_worktrees(worktrees);
}
struct add_alternate_refs_data {
struct rev_info *revs;
unsigned int flags;
};
static void add_one_alternate_ref(const struct object_id *oid,
void *vdata)
{
const char *name = ".alternate";
struct add_alternate_refs_data *data = vdata;
struct object *obj;
obj = get_reference(data->revs, name, oid, data->flags);
add_rev_cmdline(data->revs, obj, name, REV_CMD_REV, data->flags);
add_pending_object(data->revs, obj, name);
}
static void add_alternate_refs_to_pending(struct rev_info *revs,
unsigned int flags)
{
struct add_alternate_refs_data data;
data.revs = revs;
data.flags = flags;
for_each_alternate_ref(add_one_alternate_ref, &data);
}
static int add_parents_only(struct rev_info *revs, const char *arg_, int flags,
int exclude_parent)
{
struct object_id oid;
struct object *it;
struct commit *commit;
struct commit_list *parents;
int parent_number;
const char *arg = arg_;
if (*arg == '^') {
flags ^= UNINTERESTING | BOTTOM;
arg++;
}
if (get_oid_committish(arg, &oid))
return 0;
while (1) {
it = get_reference(revs, arg, &oid, 0);
if (!it && revs->ignore_missing)
return 0;
if (it->type != OBJ_TAG)
break;
if (!((struct tag*)it)->tagged)
return 0;
oidcpy(&oid, &((struct tag*)it)->tagged->oid);
}
if (it->type != OBJ_COMMIT)
return 0;
commit = (struct commit *)it;
if (exclude_parent &&
exclude_parent > commit_list_count(commit->parents))
return 0;
for (parents = commit->parents, parent_number = 1;
parents;
parents = parents->next, parent_number++) {
if (exclude_parent && parent_number != exclude_parent)
continue;
it = &parents->item->object;
it->flags |= flags;
add_rev_cmdline(revs, it, arg_, REV_CMD_PARENTS_ONLY, flags);
add_pending_object(revs, it, arg);
}
return 1;
}
void repo_init_revisions(struct repository *r,
struct rev_info *revs,
const char *prefix)
{
struct rev_info blank = REV_INFO_INIT;
memcpy(revs, &blank, sizeof(*revs));
revs->repo = r;
revs->pruning.repo = r;
revs->pruning.add_remove = file_add_remove;
revs->pruning.change = file_change;
revs->pruning.change_fn_data = revs;
revs->prefix = prefix;
grep_init(&revs->grep_filter, revs->repo);
revs->grep_filter.status_only = 1;
repo_diff_setup(revs->repo, &revs->diffopt);
if (prefix && !revs->diffopt.prefix) {
revs->diffopt.prefix = prefix;
revs->diffopt.prefix_length = strlen(prefix);
}
init_display_notes(&revs->notes_opt);
list_objects_filter_init(&revs->filter);
init_ref_exclusions(&revs->ref_excludes);
}
static void add_pending_commit_list(struct rev_info *revs,
struct commit_list *commit_list,
unsigned int flags)
{
while (commit_list) {
struct object *object = &commit_list->item->object;
object->flags |= flags;
add_pending_object(revs, object, oid_to_hex(&object->oid));
commit_list = commit_list->next;
}
}
static void prepare_show_merge(struct rev_info *revs)
{
struct commit_list *bases;
struct commit *head, *other;
struct object_id oid;
const char **prune = NULL;
int i, prune_num = 1; /* counting terminating NULL */
struct index_state *istate = revs->repo->index;
if (get_oid("HEAD", &oid))
die("--merge without HEAD?");
head = lookup_commit_or_die(&oid, "HEAD");
if (get_oid("MERGE_HEAD", &oid))
die("--merge without MERGE_HEAD?");
other = lookup_commit_or_die(&oid, "MERGE_HEAD");
add_pending_object(revs, &head->object, "HEAD");
add_pending_object(revs, &other->object, "MERGE_HEAD");
bases = get_merge_bases(head, other);
add_rev_cmdline_list(revs, bases, REV_CMD_MERGE_BASE, UNINTERESTING | BOTTOM);
add_pending_commit_list(revs, bases, UNINTERESTING | BOTTOM);
free_commit_list(bases);
head->object.flags |= SYMMETRIC_LEFT;
if (!istate->cache_nr)
repo_read_index(revs->repo);
for (i = 0; i < istate->cache_nr; i++) {
const struct cache_entry *ce = istate->cache[i];
if (!ce_stage(ce))
continue;
if (ce_path_match(istate, ce, &revs->prune_data, NULL)) {
prune_num++;
REALLOC_ARRAY(prune, prune_num);
prune[prune_num-2] = ce->name;
prune[prune_num-1] = NULL;
}
while ((i+1 < istate->cache_nr) &&
ce_same_name(ce, istate->cache[i+1]))
i++;
}
clear_pathspec(&revs->prune_data);
parse_pathspec(&revs->prune_data, PATHSPEC_ALL_MAGIC & ~PATHSPEC_LITERAL,
PATHSPEC_PREFER_FULL | PATHSPEC_LITERAL_PATH, "", prune);
revs->limited = 1;
}
static int dotdot_missing(const char *arg, char *dotdot,
struct rev_info *revs, int symmetric)
{
if (revs->ignore_missing)
return 0;
/* de-munge so we report the full argument */
*dotdot = '.';
die(symmetric
? "Invalid symmetric difference expression %s"
: "Invalid revision range %s", arg);
}
static int handle_dotdot_1(const char *arg, char *dotdot,
struct rev_info *revs, int flags,
int cant_be_filename,
struct object_context *a_oc,
struct object_context *b_oc)
{
const char *a_name, *b_name;
struct object_id a_oid, b_oid;
struct object *a_obj, *b_obj;
unsigned int a_flags, b_flags;
int symmetric = 0;
unsigned int flags_exclude = flags ^ (UNINTERESTING | BOTTOM);
unsigned int oc_flags = GET_OID_COMMITTISH | GET_OID_RECORD_PATH;
a_name = arg;
if (!*a_name)
a_name = "HEAD";
b_name = dotdot + 2;
if (*b_name == '.') {
symmetric = 1;
b_name++;
}
if (!*b_name)
b_name = "HEAD";
if (get_oid_with_context(revs->repo, a_name, oc_flags, &a_oid, a_oc) ||
get_oid_with_context(revs->repo, b_name, oc_flags, &b_oid, b_oc))
return -1;
if (!cant_be_filename) {
*dotdot = '.';
verify_non_filename(revs->prefix, arg);
*dotdot = '\0';
}
a_obj = parse_object(revs->repo, &a_oid);
b_obj = parse_object(revs->repo, &b_oid);
if (!a_obj || !b_obj)
return dotdot_missing(arg, dotdot, revs, symmetric);
if (!symmetric) {
/* just A..B */
b_flags = flags;
a_flags = flags_exclude;
} else {
/* A...B -- find merge bases between the two */
struct commit *a, *b;
struct commit_list *exclude;
a = lookup_commit_reference(revs->repo, &a_obj->oid);
b = lookup_commit_reference(revs->repo, &b_obj->oid);
if (!a || !b)
return dotdot_missing(arg, dotdot, revs, symmetric);
exclude = get_merge_bases(a, b);
add_rev_cmdline_list(revs, exclude, REV_CMD_MERGE_BASE,
flags_exclude);
add_pending_commit_list(revs, exclude, flags_exclude);
free_commit_list(exclude);
b_flags = flags;
a_flags = flags | SYMMETRIC_LEFT;
}
a_obj->flags |= a_flags;
b_obj->flags |= b_flags;
add_rev_cmdline(revs, a_obj, a_name, REV_CMD_LEFT, a_flags);
add_rev_cmdline(revs, b_obj, b_name, REV_CMD_RIGHT, b_flags);
add_pending_object_with_path(revs, a_obj, a_name, a_oc->mode, a_oc->path);
add_pending_object_with_path(revs, b_obj, b_name, b_oc->mode, b_oc->path);
return 0;
}
static int handle_dotdot(const char *arg,
struct rev_info *revs, int flags,
int cant_be_filename)
{
struct object_context a_oc, b_oc;
char *dotdot = strstr(arg, "..");
int ret;
if (!dotdot)
return -1;
memset(&a_oc, 0, sizeof(a_oc));
memset(&b_oc, 0, sizeof(b_oc));
*dotdot = '\0';
ret = handle_dotdot_1(arg, dotdot, revs, flags, cant_be_filename,
&a_oc, &b_oc);
*dotdot = '.';
free(a_oc.path);
free(b_oc.path);
return ret;
}
static int handle_revision_arg_1(const char *arg_, struct rev_info *revs, int flags, unsigned revarg_opt)
{
struct object_context oc;
char *mark;
struct object *object;
struct object_id oid;
int local_flags;
const char *arg = arg_;
int cant_be_filename = revarg_opt & REVARG_CANNOT_BE_FILENAME;
unsigned get_sha1_flags = GET_OID_RECORD_PATH;
flags = flags & UNINTERESTING ? flags | BOTTOM : flags & ~BOTTOM;
if (!cant_be_filename && !strcmp(arg, "..")) {
/*
* Just ".."? That is not a range but the
* pathspec for the parent directory.
*/
return -1;
}
if (!handle_dotdot(arg, revs, flags, revarg_opt))
return 0;
mark = strstr(arg, "^@");
if (mark && !mark[2]) {
*mark = 0;
if (add_parents_only(revs, arg, flags, 0))
return 0;
*mark = '^';
}
mark = strstr(arg, "^!");
if (mark && !mark[2]) {
*mark = 0;
if (!add_parents_only(revs, arg, flags ^ (UNINTERESTING | BOTTOM), 0))
*mark = '^';
}
mark = strstr(arg, "^-");
if (mark) {
int exclude_parent = 1;
if (mark[2]) {
if (strtol_i(mark + 2, 10, &exclude_parent) ||
exclude_parent < 1)
return -1;
}
*mark = 0;
if (!add_parents_only(revs, arg, flags ^ (UNINTERESTING | BOTTOM), exclude_parent))
*mark = '^';
}
local_flags = 0;
if (*arg == '^') {
local_flags = UNINTERESTING | BOTTOM;
arg++;
}
if (revarg_opt & REVARG_COMMITTISH)
get_sha1_flags |= GET_OID_COMMITTISH;
if (get_oid_with_context(revs->repo, arg, get_sha1_flags, &oid, &oc))
return revs->ignore_missing ? 0 : -1;
if (!cant_be_filename)
verify_non_filename(revs->prefix, arg);
object = get_reference(revs, arg, &oid, flags ^ local_flags);
if (!object)
return revs->ignore_missing ? 0 : -1;
add_rev_cmdline(revs, object, arg_, REV_CMD_REV, flags ^ local_flags);
add_pending_object_with_path(revs, object, arg, oc.mode, oc.path);
free(oc.path);
return 0;
}
int handle_revision_arg(const char *arg, struct rev_info *revs, int flags, unsigned revarg_opt)
{
int ret = handle_revision_arg_1(arg, revs, flags, revarg_opt);
if (!ret)
revs->rev_input_given = 1;
return ret;
}
static void read_pathspec_from_stdin(struct strbuf *sb,
struct strvec *prune)
{
while (strbuf_getline(sb, stdin) != EOF)
strvec_push(prune, sb->buf);
}
static void read_revisions_from_stdin(struct rev_info *revs,
struct strvec *prune)
{
struct strbuf sb;
int seen_dashdash = 0;
int save_warning;
save_warning = warn_on_object_refname_ambiguity;
warn_on_object_refname_ambiguity = 0;
strbuf_init(&sb, 1000);
while (strbuf_getline(&sb, stdin) != EOF) {
int len = sb.len;
if (!len)
break;
if (sb.buf[0] == '-') {
if (len == 2 && sb.buf[1] == '-') {
seen_dashdash = 1;
break;
}
die("options not supported in --stdin mode");
}
if (handle_revision_arg(sb.buf, revs, 0,
REVARG_CANNOT_BE_FILENAME))
die("bad revision '%s'", sb.buf);
}
if (seen_dashdash)
read_pathspec_from_stdin(&sb, prune);
strbuf_release(&sb);
warn_on_object_refname_ambiguity = save_warning;
}
static void add_grep(struct rev_info *revs, const char *ptn, enum grep_pat_token what)
{
append_grep_pattern(&revs->grep_filter, ptn, "command line", 0, what);
}
static void add_header_grep(struct rev_info *revs, enum grep_header_field field, const char *pattern)
{
append_header_grep_pattern(&revs->grep_filter, field, pattern);
}
static void add_message_grep(struct rev_info *revs, const char *pattern)
{
add_grep(revs, pattern, GREP_PATTERN_BODY);
}
static int handle_revision_opt(struct rev_info *revs, int argc, const char **argv,
int *unkc, const char **unkv,
const struct setup_revision_opt* opt)
{
const char *arg = argv[0];
const char *optarg = NULL;
int argcount;
const unsigned hexsz = the_hash_algo->hexsz;
/* pseudo revision arguments */
if (!strcmp(arg, "--all") || !strcmp(arg, "--branches") ||
!strcmp(arg, "--tags") || !strcmp(arg, "--remotes") ||
!strcmp(arg, "--reflog") || !strcmp(arg, "--not") ||
!strcmp(arg, "--no-walk") || !strcmp(arg, "--do-walk") ||
!strcmp(arg, "--bisect") || starts_with(arg, "--glob=") ||
!strcmp(arg, "--indexed-objects") ||
!strcmp(arg, "--alternate-refs") ||
starts_with(arg, "--exclude=") || starts_with(arg, "--exclude-hidden=") ||
starts_with(arg, "--branches=") || starts_with(arg, "--tags=") ||
starts_with(arg, "--remotes=") || starts_with(arg, "--no-walk="))
{
unkv[(*unkc)++] = arg;
return 1;
}
if ((argcount = parse_long_opt("max-count", argv, &optarg))) {
revs->max_count = atoi(optarg);
revs->no_walk = 0;
return argcount;
} else if ((argcount = parse_long_opt("skip", argv, &optarg))) {
revs->skip_count = atoi(optarg);
return argcount;
} else if ((*arg == '-') && isdigit(arg[1])) {
/* accept -<digit>, like traditional "head" */
if (strtol_i(arg + 1, 10, &revs->max_count) < 0 ||
revs->max_count < 0)
die("'%s': not a non-negative integer", arg + 1);
revs->no_walk = 0;
} else if (!strcmp(arg, "-n")) {
if (argc <= 1)
return error("-n requires an argument");
revs->max_count = atoi(argv[1]);
revs->no_walk = 0;
return 2;
} else if (skip_prefix(arg, "-n", &optarg)) {
revs->max_count = atoi(optarg);
revs->no_walk = 0;
} else if ((argcount = parse_long_opt("max-age", argv, &optarg))) {
revs->max_age = atoi(optarg);
return argcount;
} else if ((argcount = parse_long_opt("since", argv, &optarg))) {
revs->max_age = approxidate(optarg);
return argcount;
} else if ((argcount = parse_long_opt("since-as-filter", argv, &optarg))) {
revs->max_age_as_filter = approxidate(optarg);
return argcount;
} else if ((argcount = parse_long_opt("after", argv, &optarg))) {
revs->max_age = approxidate(optarg);
return argcount;
} else if ((argcount = parse_long_opt("min-age", argv, &optarg))) {
revs->min_age = atoi(optarg);
return argcount;
} else if ((argcount = parse_long_opt("before", argv, &optarg))) {
revs->min_age = approxidate(optarg);
return argcount;
} else if ((argcount = parse_long_opt("until", argv, &optarg))) {
revs->min_age = approxidate(optarg);
return argcount;
} else if (!strcmp(arg, "--first-parent")) {
revs->first_parent_only = 1;
} else if (!strcmp(arg, "--exclude-first-parent-only")) {
revs->exclude_first_parent_only = 1;
} else if (!strcmp(arg, "--ancestry-path")) {
revs->ancestry_path = 1;
revs->simplify_history = 0;
revs->limited = 1;
revs->ancestry_path_implicit_bottoms = 1;
} else if (skip_prefix(arg, "--ancestry-path=", &optarg)) {
struct commit *c;
struct object_id oid;
const char *msg = _("could not get commit for ancestry-path argument %s");
revs->ancestry_path = 1;
revs->simplify_history = 0;
revs->limited = 1;
if (repo_get_oid_committish(revs->repo, optarg, &oid))
return error(msg, optarg);
get_reference(revs, optarg, &oid, ANCESTRY_PATH);
c = lookup_commit_reference(revs->repo, &oid);
if (!c)
return error(msg, optarg);
commit_list_insert(c, &revs->ancestry_path_bottoms);
} else if (!strcmp(arg, "-g") || !strcmp(arg, "--walk-reflogs")) {
init_reflog_walk(&revs->reflog_info);
} else if (!strcmp(arg, "--default")) {
if (argc <= 1)
return error("bad --default argument");
revs->def = argv[1];
return 2;
} else if (!strcmp(arg, "--merge")) {
revs->show_merge = 1;
} else if (!strcmp(arg, "--topo-order")) {
revs->sort_order = REV_SORT_IN_GRAPH_ORDER;
revs->topo_order = 1;
} else if (!strcmp(arg, "--simplify-merges")) {
revs->simplify_merges = 1;
revs->topo_order = 1;
revs->rewrite_parents = 1;
revs->simplify_history = 0;
revs->limited = 1;
} else if (!strcmp(arg, "--simplify-by-decoration")) {
revs->simplify_merges = 1;
revs->topo_order = 1;
revs->rewrite_parents = 1;
revs->simplify_history = 0;
revs->simplify_by_decoration = 1;
revs->limited = 1;
revs->prune = 1;
} else if (!strcmp(arg, "--date-order")) {
revs->sort_order = REV_SORT_BY_COMMIT_DATE;
revs->topo_order = 1;
} else if (!strcmp(arg, "--author-date-order")) {
revs->sort_order = REV_SORT_BY_AUTHOR_DATE;
revs->topo_order = 1;
} else if (!strcmp(arg, "--early-output")) {
revs->early_output = 100;
revs->topo_order = 1;
} else if (skip_prefix(arg, "--early-output=", &optarg)) {
if (strtoul_ui(optarg, 10, &revs->early_output) < 0)
die("'%s': not a non-negative integer", optarg);
revs->topo_order = 1;
} else if (!strcmp(arg, "--parents")) {
revs->rewrite_parents = 1;
revs->print_parents = 1;
} else if (!strcmp(arg, "--dense")) {
revs->dense = 1;
} else if (!strcmp(arg, "--sparse")) {
revs->dense = 0;
} else if (!strcmp(arg, "--in-commit-order")) {
revs->tree_blobs_in_commit_order = 1;
} else if (!strcmp(arg, "--remove-empty")) {
revs->remove_empty_trees = 1;
} else if (!strcmp(arg, "--merges")) {
revs->min_parents = 2;
} else if (!strcmp(arg, "--no-merges")) {
revs->max_parents = 1;
} else if (skip_prefix(arg, "--min-parents=", &optarg)) {
revs->min_parents = atoi(optarg);
} else if (!strcmp(arg, "--no-min-parents")) {
revs->min_parents = 0;
} else if (skip_prefix(arg, "--max-parents=", &optarg)) {
revs->max_parents = atoi(optarg);
} else if (!strcmp(arg, "--no-max-parents")) {
revs->max_parents = -1;
} else if (!strcmp(arg, "--boundary")) {
revs->boundary = 1;
} else if (!strcmp(arg, "--left-right")) {
revs->left_right = 1;
} else if (!strcmp(arg, "--left-only")) {
if (revs->right_only)
die("--left-only is incompatible with --right-only"
" or --cherry");
revs->left_only = 1;
} else if (!strcmp(arg, "--right-only")) {
if (revs->left_only)
die(_("options '%s' and '%s' cannot be used together"), "--right-only", "--left-only");
revs->right_only = 1;
} else if (!strcmp(arg, "--cherry")) {
if (revs->left_only)
die(_("options '%s' and '%s' cannot be used together"), "--cherry", "--left-only");
revs->cherry_mark = 1;
revs->right_only = 1;
revs->max_parents = 1;
revs->limited = 1;
} else if (!strcmp(arg, "--count")) {
revs->count = 1;
} else if (!strcmp(arg, "--cherry-mark")) {
if (revs->cherry_pick)
die(_("options '%s' and '%s' cannot be used together"), "--cherry-mark", "--cherry-pick");
revs->cherry_mark = 1;
revs->limited = 1; /* needs limit_list() */
} else if (!strcmp(arg, "--cherry-pick")) {
if (revs->cherry_mark)
die(_("options '%s' and '%s' cannot be used together"), "--cherry-pick", "--cherry-mark");
revs->cherry_pick = 1;
revs->limited = 1;
} else if (!strcmp(arg, "--objects")) {
revs->tag_objects = 1;
revs->tree_objects = 1;
revs->blob_objects = 1;
} else if (!strcmp(arg, "--objects-edge")) {
revs->tag_objects = 1;
revs->tree_objects = 1;
revs->blob_objects = 1;
revs->edge_hint = 1;
} else if (!strcmp(arg, "--objects-edge-aggressive")) {
revs->tag_objects = 1;
revs->tree_objects = 1;
revs->blob_objects = 1;
revs->edge_hint = 1;
revs->edge_hint_aggressive = 1;
} else if (!strcmp(arg, "--verify-objects")) {
revs->tag_objects = 1;
revs->tree_objects = 1;
revs->blob_objects = 1;
revs->verify_objects = 1;
disable_commit_graph(revs->repo);
} else if (!strcmp(arg, "--unpacked")) {
revs->unpacked = 1;
} else if (starts_with(arg, "--unpacked=")) {
die(_("--unpacked=<packfile> no longer supported"));
} else if (!strcmp(arg, "--no-kept-objects")) {
revs->no_kept_objects = 1;
revs->keep_pack_cache_flags |= IN_CORE_KEEP_PACKS;
revs->keep_pack_cache_flags |= ON_DISK_KEEP_PACKS;
} else if (skip_prefix(arg, "--no-kept-objects=", &optarg)) {
revs->no_kept_objects = 1;
if (!strcmp(optarg, "in-core"))
revs->keep_pack_cache_flags |= IN_CORE_KEEP_PACKS;
if (!strcmp(optarg, "on-disk"))
revs->keep_pack_cache_flags |= ON_DISK_KEEP_PACKS;
} else if (!strcmp(arg, "-r")) {
revs->diff = 1;
revs->diffopt.flags.recursive = 1;
} else if (!strcmp(arg, "-t")) {
revs->diff = 1;
revs->diffopt.flags.recursive = 1;
revs->diffopt.flags.tree_in_recursive = 1;
} else if ((argcount = diff_merges_parse_opts(revs, argv))) {
return argcount;
} else if (!strcmp(arg, "-v")) {
revs->verbose_header = 1;
} else if (!strcmp(arg, "--pretty")) {
revs->verbose_header = 1;
revs->pretty_given = 1;
get_commit_format(NULL, revs);
} else if (skip_prefix(arg, "--pretty=", &optarg) ||
skip_prefix(arg, "--format=", &optarg)) {
/*
* Detached form ("--pretty X" as opposed to "--pretty=X")
* not allowed, since the argument is optional.
*/
revs->verbose_header = 1;
revs->pretty_given = 1;
get_commit_format(optarg, revs);
} else if (!strcmp(arg, "--expand-tabs")) {
revs->expand_tabs_in_log = 8;
} else if (!strcmp(arg, "--no-expand-tabs")) {
revs->expand_tabs_in_log = 0;
} else if (skip_prefix(arg, "--expand-tabs=", &arg)) {
int val;
if (strtol_i(arg, 10, &val) < 0 || val < 0)
die("'%s': not a non-negative integer", arg);
revs->expand_tabs_in_log = val;
} else if (!strcmp(arg, "--show-notes") || !strcmp(arg, "--notes")) {
enable_default_display_notes(&revs->notes_opt, &revs->show_notes);
revs->show_notes_given = 1;
} else if (!strcmp(arg, "--show-signature")) {
revs->show_signature = 1;
} else if (!strcmp(arg, "--no-show-signature")) {
revs->show_signature = 0;
} else if (!strcmp(arg, "--show-linear-break")) {
revs->break_bar = " ..........";
revs->track_linear = 1;
revs->track_first_time = 1;
} else if (skip_prefix(arg, "--show-linear-break=", &optarg)) {
revs->break_bar = xstrdup(optarg);
revs->track_linear = 1;
revs->track_first_time = 1;
} else if (skip_prefix(arg, "--show-notes=", &optarg) ||
skip_prefix(arg, "--notes=", &optarg)) {
if (starts_with(arg, "--show-notes=") &&
revs->notes_opt.use_default_notes < 0)
revs->notes_opt.use_default_notes = 1;
enable_ref_display_notes(&revs->notes_opt, &revs->show_notes, optarg);
revs->show_notes_given = 1;
} else if (!strcmp(arg, "--no-notes")) {
disable_display_notes(&revs->notes_opt, &revs->show_notes);
revs->show_notes_given = 1;
} else if (!strcmp(arg, "--standard-notes")) {
revs->show_notes_given = 1;
revs->notes_opt.use_default_notes = 1;
} else if (!strcmp(arg, "--no-standard-notes")) {
revs->notes_opt.use_default_notes = 0;
} else if (!strcmp(arg, "--oneline")) {
revs->verbose_header = 1;
get_commit_format("oneline", revs);
revs->pretty_given = 1;
revs->abbrev_commit = 1;
} else if (!strcmp(arg, "--graph")) {
graph_clear(revs->graph);
revs->graph = graph_init(revs);
} else if (!strcmp(arg, "--no-graph")) {
graph_clear(revs->graph);
revs->graph = NULL;
} else if (!strcmp(arg, "--encode-email-headers")) {
revs->encode_email_headers = 1;
} else if (!strcmp(arg, "--no-encode-email-headers")) {
revs->encode_email_headers = 0;
} else if (!strcmp(arg, "--root")) {
revs->show_root_diff = 1;
} else if (!strcmp(arg, "--no-commit-id")) {
revs->no_commit_id = 1;
} else if (!strcmp(arg, "--always")) {
revs->always_show_header = 1;
} else if (!strcmp(arg, "--no-abbrev")) {
revs->abbrev = 0;
} else if (!strcmp(arg, "--abbrev")) {
revs->abbrev = DEFAULT_ABBREV;
} else if (skip_prefix(arg, "--abbrev=", &optarg)) {
revs->abbrev = strtoul(optarg, NULL, 10);
if (revs->abbrev < MINIMUM_ABBREV)
revs->abbrev = MINIMUM_ABBREV;
else if (revs->abbrev > hexsz)
revs->abbrev = hexsz;
} else if (!strcmp(arg, "--abbrev-commit")) {
revs->abbrev_commit = 1;
revs->abbrev_commit_given = 1;
} else if (!strcmp(arg, "--no-abbrev-commit")) {
revs->abbrev_commit = 0;
} else if (!strcmp(arg, "--full-diff")) {
revs->diff = 1;
revs->full_diff = 1;
} else if (!strcmp(arg, "--show-pulls")) {
revs->show_pulls = 1;
} else if (!strcmp(arg, "--full-history")) {
revs->simplify_history = 0;
} else if (!strcmp(arg, "--relative-date")) {
revs->date_mode.type = DATE_RELATIVE;
revs->date_mode_explicit = 1;
} else if ((argcount = parse_long_opt("date", argv, &optarg))) {
parse_date_format(optarg, &revs->date_mode);
revs->date_mode_explicit = 1;
return argcount;
} else if (!strcmp(arg, "--log-size")) {
revs->show_log_size = 1;
}
/*
* Grepping the commit log
*/
else if ((argcount = parse_long_opt("author", argv, &optarg))) {
add_header_grep(revs, GREP_HEADER_AUTHOR, optarg);
return argcount;
} else if ((argcount = parse_long_opt("committer", argv, &optarg))) {
add_header_grep(revs, GREP_HEADER_COMMITTER, optarg);
return argcount;
} else if ((argcount = parse_long_opt("grep-reflog", argv, &optarg))) {
add_header_grep(revs, GREP_HEADER_REFLOG, optarg);
return argcount;
} else if ((argcount = parse_long_opt("grep", argv, &optarg))) {
add_message_grep(revs, optarg);
return argcount;
} else if (!strcmp(arg, "--basic-regexp")) {
revs->grep_filter.pattern_type_option = GREP_PATTERN_TYPE_BRE;
} else if (!strcmp(arg, "--extended-regexp") || !strcmp(arg, "-E")) {
revs->grep_filter.pattern_type_option = GREP_PATTERN_TYPE_ERE;
} else if (!strcmp(arg, "--regexp-ignore-case") || !strcmp(arg, "-i")) {
revs->grep_filter.ignore_case = 1;
revs->diffopt.pickaxe_opts |= DIFF_PICKAXE_IGNORE_CASE;
} else if (!strcmp(arg, "--fixed-strings") || !strcmp(arg, "-F")) {
revs->grep_filter.pattern_type_option = GREP_PATTERN_TYPE_FIXED;
} else if (!strcmp(arg, "--perl-regexp") || !strcmp(arg, "-P")) {
revs->grep_filter.pattern_type_option = GREP_PATTERN_TYPE_PCRE;
} else if (!strcmp(arg, "--all-match")) {
revs->grep_filter.all_match = 1;
} else if (!strcmp(arg, "--invert-grep")) {
revs->grep_filter.no_body_match = 1;
} else if ((argcount = parse_long_opt("encoding", argv, &optarg))) {
if (strcmp(optarg, "none"))
git_log_output_encoding = xstrdup(optarg);
else
git_log_output_encoding = "";
return argcount;
} else if (!strcmp(arg, "--reverse")) {
revs->reverse ^= 1;
} else if (!strcmp(arg, "--children")) {
revs->children.name = "children";
revs->limited = 1;
} else if (!strcmp(arg, "--ignore-missing")) {
revs->ignore_missing = 1;
} else if (opt && opt->allow_exclude_promisor_objects &&
!strcmp(arg, "--exclude-promisor-objects")) {
if (fetch_if_missing)
BUG("exclude_promisor_objects can only be used when fetch_if_missing is 0");
revs->exclude_promisor_objects = 1;
} else {
int opts = diff_opt_parse(&revs->diffopt, argv, argc, revs->prefix);
if (!opts)
unkv[(*unkc)++] = arg;
return opts;
}
return 1;
}
void parse_revision_opt(struct rev_info *revs, struct parse_opt_ctx_t *ctx,
const struct option *options,
const char * const usagestr[])
{
int n = handle_revision_opt(revs, ctx->argc, ctx->argv,
&ctx->cpidx, ctx->out, NULL);
if (n <= 0) {
error("unknown option `%s'", ctx->argv[0]);
usage_with_options(usagestr, options);
}
ctx->argv += n;
ctx->argc -= n;
}
void revision_opts_finish(struct rev_info *revs)
{
if (revs->graph && revs->track_linear)
die(_("options '%s' and '%s' cannot be used together"), "--show-linear-break", "--graph");
if (revs->graph) {
revs->topo_order = 1;
revs->rewrite_parents = 1;
}
}
static int for_each_bisect_ref(struct ref_store *refs, each_ref_fn fn,
void *cb_data, const char *term)
{
struct strbuf bisect_refs = STRBUF_INIT;
int status;
strbuf_addf(&bisect_refs, "refs/bisect/%s", term);
status = refs_for_each_fullref_in(refs, bisect_refs.buf, fn, cb_data);
strbuf_release(&bisect_refs);
return status;
}
static int for_each_bad_bisect_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
{
return for_each_bisect_ref(refs, fn, cb_data, term_bad);
}
static int for_each_good_bisect_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
{
return for_each_bisect_ref(refs, fn, cb_data, term_good);
}
static int handle_revision_pseudo_opt(struct rev_info *revs,
const char **argv, int *flags)
{
const char *arg = argv[0];
const char *optarg;
struct ref_store *refs;
int argcount;
if (revs->repo != the_repository) {
/*
* We need some something like get_submodule_worktrees()
* before we can go through all worktrees of a submodule,
* .e.g with adding all HEADs from --all, which is not
* supported right now, so stick to single worktree.
*/
if (!revs->single_worktree)
BUG("--single-worktree cannot be used together with submodule");
}
refs = get_main_ref_store(revs->repo);
/*
* NOTE!
*
* Commands like "git shortlog" will not accept the options below
* unless parse_revision_opt queues them (as opposed to erroring
* out).
*
* When implementing your new pseudo-option, remember to
* register it in the list at the top of handle_revision_opt.
*/
if (!strcmp(arg, "--all")) {
handle_refs(refs, revs, *flags, refs_for_each_ref);
handle_refs(refs, revs, *flags, refs_head_ref);
if (!revs->single_worktree) {
struct all_refs_cb cb;
init_all_refs_cb(&cb, revs, *flags);
other_head_refs(handle_one_ref, &cb);
}
clear_ref_exclusions(&revs->ref_excludes);
} else if (!strcmp(arg, "--branches")) {
if (revs->ref_excludes.hidden_refs_configured)
return error(_("--exclude-hidden cannot be used together with --branches"));
handle_refs(refs, revs, *flags, refs_for_each_branch_ref);
clear_ref_exclusions(&revs->ref_excludes);
} else if (!strcmp(arg, "--bisect")) {
read_bisect_terms(&term_bad, &term_good);
handle_refs(refs, revs, *flags, for_each_bad_bisect_ref);
handle_refs(refs, revs, *flags ^ (UNINTERESTING | BOTTOM),
for_each_good_bisect_ref);
revs->bisect = 1;
} else if (!strcmp(arg, "--tags")) {
if (revs->ref_excludes.hidden_refs_configured)
return error(_("--exclude-hidden cannot be used together with --tags"));
handle_refs(refs, revs, *flags, refs_for_each_tag_ref);
clear_ref_exclusions(&revs->ref_excludes);
} else if (!strcmp(arg, "--remotes")) {
if (revs->ref_excludes.hidden_refs_configured)
return error(_("--exclude-hidden cannot be used together with --remotes"));
handle_refs(refs, revs, *flags, refs_for_each_remote_ref);
clear_ref_exclusions(&revs->ref_excludes);
} else if ((argcount = parse_long_opt("glob", argv, &optarg))) {
struct all_refs_cb cb;
init_all_refs_cb(&cb, revs, *flags);
for_each_glob_ref(handle_one_ref, optarg, &cb);
clear_ref_exclusions(&revs->ref_excludes);
return argcount;
} else if ((argcount = parse_long_opt("exclude", argv, &optarg))) {
add_ref_exclusion(&revs->ref_excludes, optarg);
return argcount;
} else if ((argcount = parse_long_opt("exclude-hidden", argv, &optarg))) {
exclude_hidden_refs(&revs->ref_excludes, optarg);
return argcount;
} else if (skip_prefix(arg, "--branches=", &optarg)) {
struct all_refs_cb cb;
if (revs->ref_excludes.hidden_refs_configured)
return error(_("--exclude-hidden cannot be used together with --branches"));
init_all_refs_cb(&cb, revs, *flags);
for_each_glob_ref_in(handle_one_ref, optarg, "refs/heads/", &cb);
clear_ref_exclusions(&revs->ref_excludes);
} else if (skip_prefix(arg, "--tags=", &optarg)) {
struct all_refs_cb cb;
if (revs->ref_excludes.hidden_refs_configured)
return error(_("--exclude-hidden cannot be used together with --tags"));
init_all_refs_cb(&cb, revs, *flags);
for_each_glob_ref_in(handle_one_ref, optarg, "refs/tags/", &cb);
clear_ref_exclusions(&revs->ref_excludes);
} else if (skip_prefix(arg, "--remotes=", &optarg)) {
struct all_refs_cb cb;
if (revs->ref_excludes.hidden_refs_configured)
return error(_("--exclude-hidden cannot be used together with --remotes"));
init_all_refs_cb(&cb, revs, *flags);
for_each_glob_ref_in(handle_one_ref, optarg, "refs/remotes/", &cb);
clear_ref_exclusions(&revs->ref_excludes);
} else if (!strcmp(arg, "--reflog")) {
add_reflogs_to_pending(revs, *flags);
} else if (!strcmp(arg, "--indexed-objects")) {
add_index_objects_to_pending(revs, *flags);
} else if (!strcmp(arg, "--alternate-refs")) {
add_alternate_refs_to_pending(revs, *flags);
} else if (!strcmp(arg, "--not")) {
*flags ^= UNINTERESTING | BOTTOM;
} else if (!strcmp(arg, "--no-walk")) {
revs->no_walk = 1;
} else if (skip_prefix(arg, "--no-walk=", &optarg)) {
/*
* Detached form ("--no-walk X" as opposed to "--no-walk=X")
* not allowed, since the argument is optional.
*/
revs->no_walk = 1;
if (!strcmp(optarg, "sorted"))
revs->unsorted_input = 0;
else if (!strcmp(optarg, "unsorted"))
revs->unsorted_input = 1;
else
return error("invalid argument to --no-walk");
} else if (!strcmp(arg, "--do-walk")) {
revs->no_walk = 0;
} else if (!strcmp(arg, "--single-worktree")) {
revs->single_worktree = 1;
} else if (skip_prefix(arg, ("--filter="), &arg)) {
parse_list_objects_filter(&revs->filter, arg);
} else if (!strcmp(arg, ("--no-filter"))) {
list_objects_filter_set_no_filter(&revs->filter);
} else {
return 0;
}
return 1;
}
static void NORETURN diagnose_missing_default(const char *def)
{
int flags;
const char *refname;
refname = resolve_ref_unsafe(def, 0, NULL, &flags);
if (!refname || !(flags & REF_ISSYMREF) || (flags & REF_ISBROKEN))
die(_("your current branch appears to be broken"));
skip_prefix(refname, "refs/heads/", &refname);
die(_("your current branch '%s' does not have any commits yet"),
refname);
}
/*
* Parse revision information, filling in the "rev_info" structure,
* and removing the used arguments from the argument list.
*
* Returns the number of arguments left that weren't recognized
* (which are also moved to the head of the argument list)
*/
int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct setup_revision_opt *opt)
{
int i, flags, left, seen_dashdash, revarg_opt;
struct strvec prune_data = STRVEC_INIT;
int seen_end_of_options = 0;
/* First, search for "--" */
if (opt && opt->assume_dashdash) {
seen_dashdash = 1;
} else {
seen_dashdash = 0;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (strcmp(arg, "--"))
continue;
if (opt && opt->free_removed_argv_elements)
free((char *)argv[i]);
argv[i] = NULL;
argc = i;
if (argv[i + 1])
strvec_pushv(&prune_data, argv + i + 1);
seen_dashdash = 1;
break;
}
}
/* Second, deal with arguments and options */
flags = 0;
revarg_opt = opt ? opt->revarg_opt : 0;
if (seen_dashdash)
revarg_opt |= REVARG_CANNOT_BE_FILENAME;
for (left = i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!seen_end_of_options && *arg == '-') {
int opts;
opts = handle_revision_pseudo_opt(
revs, argv + i,
&flags);
if (opts > 0) {
i += opts - 1;
continue;
}
if (!strcmp(arg, "--stdin")) {
if (revs->disable_stdin) {
argv[left++] = arg;
continue;
}
if (revs->read_from_stdin++)
die("--stdin given twice?");
read_revisions_from_stdin(revs, &prune_data);
continue;
}
if (!strcmp(arg, "--end-of-options")) {
seen_end_of_options = 1;
continue;
}
opts = handle_revision_opt(revs, argc - i, argv + i,
&left, argv, opt);
if (opts > 0) {
i += opts - 1;
continue;
}
if (opts < 0)
exit(128);
continue;
}
if (handle_revision_arg(arg, revs, flags, revarg_opt)) {
int j;
if (seen_dashdash || *arg == '^')
die("bad revision '%s'", arg);
/* If we didn't have a "--":
* (1) all filenames must exist;
* (2) all rev-args must not be interpretable
* as a valid filename.
* but the latter we have checked in the main loop.
*/
for (j = i; j < argc; j++)
verify_filename(revs->prefix, argv[j], j == i);
strvec_pushv(&prune_data, argv + i);
break;
}
}
revision_opts_finish(revs);
if (prune_data.nr) {
/*
* If we need to introduce the magic "a lone ':' means no
* pathspec whatsoever", here is the place to do so.
*
* if (prune_data.nr == 1 && !strcmp(prune_data[0], ":")) {
* prune_data.nr = 0;
* prune_data.alloc = 0;
* free(prune_data.path);
* prune_data.path = NULL;
* } else {
* terminate prune_data.alloc with NULL and
* call init_pathspec() to set revs->prune_data here.
* }
*/
parse_pathspec(&revs->prune_data, 0, 0,
revs->prefix, prune_data.v);
}
strvec_clear(&prune_data);
if (!revs->def)
revs->def = opt ? opt->def : NULL;
if (opt && opt->tweak)
opt->tweak(revs, opt);
if (revs->show_merge)
prepare_show_merge(revs);
if (revs->def && !revs->pending.nr && !revs->rev_input_given) {
struct object_id oid;
struct object *object;
struct object_context oc;
if (get_oid_with_context(revs->repo, revs->def, 0, &oid, &oc))
diagnose_missing_default(revs->def);
object = get_reference(revs, revs->def, &oid, 0);
add_pending_object_with_mode(revs, object, revs->def, oc.mode);
}
/* Did the user ask for any diff output? Run the diff! */
if (revs->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT)
revs->diff = 1;
/* Pickaxe, diff-filter and rename following need diffs */
if ((revs->diffopt.pickaxe_opts & DIFF_PICKAXE_KINDS_MASK) ||
revs->diffopt.filter ||
revs->diffopt.flags.follow_renames)
revs->diff = 1;
if (revs->diffopt.objfind)
revs->simplify_history = 0;
if (revs->line_level_traverse) {
if (want_ancestry(revs))
revs->limited = 1;
revs->topo_order = 1;
}
if (revs->topo_order && !generation_numbers_enabled(the_repository))
revs->limited = 1;
if (revs->prune_data.nr) {
copy_pathspec(&revs->pruning.pathspec, &revs->prune_data);
/* Can't prune commits with rename following: the paths change.. */
if (!revs->diffopt.flags.follow_renames)
revs->prune = 1;
if (!revs->full_diff)
copy_pathspec(&revs->diffopt.pathspec,
&revs->prune_data);
}
diff_merges_setup_revs(revs);
revs->diffopt.abbrev = revs->abbrev;
diff_setup_done(&revs->diffopt);
if (!is_encoding_utf8(get_log_output_encoding()))
revs->grep_filter.ignore_locale = 1;
compile_grep_patterns(&revs->grep_filter);
if (revs->reverse && revs->reflog_info)
die(_("options '%s' and '%s' cannot be used together"), "--reverse", "--walk-reflogs");
if (revs->reflog_info && revs->limited)
die("cannot combine --walk-reflogs with history-limiting options");
if (revs->rewrite_parents && revs->children.name)
die(_("options '%s' and '%s' cannot be used together"), "--parents", "--children");
if (revs->filter.choice && !revs->blob_objects)
die(_("object filtering requires --objects"));
/*
* Limitations on the graph functionality
*/
if (revs->reverse && revs->graph)
die(_("options '%s' and '%s' cannot be used together"), "--reverse", "--graph");
if (revs->reflog_info && revs->graph)
die(_("options '%s' and '%s' cannot be used together"), "--walk-reflogs", "--graph");
if (revs->no_walk && revs->graph)
die(_("options '%s' and '%s' cannot be used together"), "--no-walk", "--graph");
if (!revs->reflog_info && revs->grep_filter.use_reflog_filter)
die(_("the option '%s' requires '%s'"), "--grep-reflog", "--walk-reflogs");
if (revs->line_level_traverse &&
(revs->diffopt.output_format & ~(DIFF_FORMAT_PATCH | DIFF_FORMAT_NO_OUTPUT)))
die(_("-L does not yet support diff formats besides -p and -s"));
if (revs->expand_tabs_in_log < 0)
revs->expand_tabs_in_log = revs->expand_tabs_in_log_default;
return left;
}
static void release_revisions_cmdline(struct rev_cmdline_info *cmdline)
{
unsigned int i;
for (i = 0; i < cmdline->nr; i++)
free((char *)cmdline->rev[i].name);
free(cmdline->rev);
}
static void release_revisions_mailmap(struct string_list *mailmap)
{
if (!mailmap)
return;
clear_mailmap(mailmap);
free(mailmap);
}
static void release_revisions_topo_walk_info(struct topo_walk_info *info);
void release_revisions(struct rev_info *revs)
{
free_commit_list(revs->commits);
free_commit_list(revs->ancestry_path_bottoms);
object_array_clear(&revs->pending);
object_array_clear(&revs->boundary_commits);
release_revisions_cmdline(&revs->cmdline);
list_objects_filter_release(&revs->filter);
clear_pathspec(&revs->prune_data);
date_mode_release(&revs->date_mode);
release_revisions_mailmap(revs->mailmap);
free_grep_patterns(&revs->grep_filter);
/* TODO (need to handle "no_free"): diff_free(&revs->diffopt) */
diff_free(&revs->pruning);
reflog_walk_info_release(revs->reflog_info);
release_revisions_topo_walk_info(revs->topo_walk_info);
}
static void add_child(struct rev_info *revs, struct commit *parent, struct commit *child)
{
struct commit_list *l = xcalloc(1, sizeof(*l));
l->item = child;
l->next = add_decoration(&revs->children, &parent->object, l);
}
static int remove_duplicate_parents(struct rev_info *revs, struct commit *commit)
{
struct treesame_state *ts = lookup_decoration(&revs->treesame, &commit->object);
struct commit_list **pp, *p;
int surviving_parents;
/* Examine existing parents while marking ones we have seen... */
pp = &commit->parents;
surviving_parents = 0;
while ((p = *pp) != NULL) {
struct commit *parent = p->item;
if (parent->object.flags & TMP_MARK) {
*pp = p->next;
if (ts)
compact_treesame(revs, commit, surviving_parents);
continue;
}
parent->object.flags |= TMP_MARK;
surviving_parents++;
pp = &p->next;
}
/* clear the temporary mark */
for (p = commit->parents; p; p = p->next) {
p->item->object.flags &= ~TMP_MARK;
}
/* no update_treesame() - removing duplicates can't affect TREESAME */
return surviving_parents;
}
struct merge_simplify_state {
struct commit *simplified;
};
static struct merge_simplify_state *locate_simplify_state(struct rev_info *revs, struct commit *commit)
{
struct merge_simplify_state *st;
st = lookup_decoration(&revs->merge_simplification, &commit->object);
if (!st) {
CALLOC_ARRAY(st, 1);
add_decoration(&revs->merge_simplification, &commit->object, st);
}
return st;
}
static int mark_redundant_parents(struct commit *commit)
{
struct commit_list *h = reduce_heads(commit->parents);
int i = 0, marked = 0;
struct commit_list *po, *pn;
/* Want these for sanity-checking only */
int orig_cnt = commit_list_count(commit->parents);
int cnt = commit_list_count(h);
/*
* Not ready to remove items yet, just mark them for now, based
* on the output of reduce_heads(). reduce_heads outputs the reduced
* set in its original order, so this isn't too hard.
*/
po = commit->parents;
pn = h;
while (po) {
if (pn && po->item == pn->item) {
pn = pn->next;
i++;
} else {
po->item->object.flags |= TMP_MARK;
marked++;
}
po=po->next;
}
if (i != cnt || cnt+marked != orig_cnt)
die("mark_redundant_parents %d %d %d %d", orig_cnt, cnt, i, marked);
free_commit_list(h);
return marked;
}
static int mark_treesame_root_parents(struct commit *commit)
{
struct commit_list *p;
int marked = 0;
for (p = commit->parents; p; p = p->next) {
struct commit *parent = p->item;
if (!parent->parents && (parent->object.flags & TREESAME)) {
parent->object.flags |= TMP_MARK;
marked++;
}
}
return marked;
}
/*
* Awkward naming - this means one parent we are TREESAME to.
* cf mark_treesame_root_parents: root parents that are TREESAME (to an
* empty tree). Better name suggestions?
*/
static int leave_one_treesame_to_parent(struct rev_info *revs, struct commit *commit)
{
struct treesame_state *ts = lookup_decoration(&revs->treesame, &commit->object);
struct commit *unmarked = NULL, *marked = NULL;
struct commit_list *p;
unsigned n;
for (p = commit->parents, n = 0; p; p = p->next, n++) {
if (ts->treesame[n]) {
if (p->item->object.flags & TMP_MARK) {
if (!marked)
marked = p->item;
} else {
if (!unmarked) {
unmarked = p->item;
break;
}
}
}
}
/*
* If we are TREESAME to a marked-for-deletion parent, but not to any
* unmarked parents, unmark the first TREESAME parent. This is the
* parent that the default simplify_history==1 scan would have followed,
* and it doesn't make sense to omit that path when asking for a
* simplified full history. Retaining it improves the chances of
* understanding odd missed merges that took an old version of a file.
*
* Example:
*
* I--------*X A modified the file, but mainline merge X used
* \ / "-s ours", so took the version from I. X is
* `-*A--' TREESAME to I and !TREESAME to A.
*
* Default log from X would produce "I". Without this check,
* --full-history --simplify-merges would produce "I-A-X", showing
* the merge commit X and that it changed A, but not making clear that
* it had just taken the I version. With this check, the topology above
* is retained.
*
* Note that it is possible that the simplification chooses a different
* TREESAME parent from the default, in which case this test doesn't
* activate, and we _do_ drop the default parent. Example:
*
* I------X A modified the file, but it was reverted in B,
* \ / meaning mainline merge X is TREESAME to both
* *A-*B parents.
*
* Default log would produce "I" by following the first parent;
* --full-history --simplify-merges will produce "I-A-B". But this is a
* reasonable result - it presents a logical full history leading from
* I to X, and X is not an important merge.
*/
if (!unmarked && marked) {
marked->object.flags &= ~TMP_MARK;
return 1;
}
return 0;
}
static int remove_marked_parents(struct rev_info *revs, struct commit *commit)
{
struct commit_list **pp, *p;
int nth_parent, removed = 0;
pp = &commit->parents;
nth_parent = 0;
while ((p = *pp) != NULL) {
struct commit *parent = p->item;
if (parent->object.flags & TMP_MARK) {
parent->object.flags &= ~TMP_MARK;
*pp = p->next;
free(p);
removed++;
compact_treesame(revs, commit, nth_parent);
continue;
}
pp = &p->next;
nth_parent++;
}
/* Removing parents can only increase TREESAMEness */
if (removed && !(commit->object.flags & TREESAME))
update_treesame(revs, commit);
return nth_parent;
}
static struct commit_list **simplify_one(struct rev_info *revs, struct commit *commit, struct commit_list **tail)
{
struct commit_list *p;
struct commit *parent;
struct merge_simplify_state *st, *pst;
int cnt;
st = locate_simplify_state(revs, commit);
/*
* Have we handled this one?
*/
if (st->simplified)
return tail;
/*
* An UNINTERESTING commit simplifies to itself, so does a
* root commit. We do not rewrite parents of such commit
* anyway.
*/
if ((commit->object.flags & UNINTERESTING) || !commit->parents) {
st->simplified = commit;
return tail;
}
/*
* Do we know what commit all of our parents that matter
* should be rewritten to? Otherwise we are not ready to
* rewrite this one yet.
*/
for (cnt = 0, p = commit->parents; p; p = p->next) {
pst = locate_simplify_state(revs, p->item);
if (!pst->simplified) {
tail = &commit_list_insert(p->item, tail)->next;
cnt++;
}
if (revs->first_parent_only)
break;
}
if (cnt) {
tail = &commit_list_insert(commit, tail)->next;
return tail;
}
/*
* Rewrite our list of parents. Note that this cannot
* affect our TREESAME flags in any way - a commit is
* always TREESAME to its simplification.
*/
for (p = commit->parents; p; p = p->next) {
pst = locate_simplify_state(revs, p->item);
p->item = pst->simplified;
if (revs->first_parent_only)
break;
}
if (revs->first_parent_only)
cnt = 1;
else
cnt = remove_duplicate_parents(revs, commit);
/*
* It is possible that we are a merge and one side branch
* does not have any commit that touches the given paths;
* in such a case, the immediate parent from that branch
* will be rewritten to be the merge base.
*
* o----X X: the commit we are looking at;
* / / o: a commit that touches the paths;
* ---o----'
*
* Further, a merge of an independent branch that doesn't
* touch the path will reduce to a treesame root parent:
*
* ----o----X X: the commit we are looking at;
* / o: a commit that touches the paths;
* r r: a root commit not touching the paths
*
* Detect and simplify both cases.
*/
if (1 < cnt) {
int marked = mark_redundant_parents(commit);
marked += mark_treesame_root_parents(commit);
if (marked)
marked -= leave_one_treesame_to_parent(revs, commit);
if (marked)
cnt = remove_marked_parents(revs, commit);
}
/*
* A commit simplifies to itself if it is a root, if it is
* UNINTERESTING, if it touches the given paths, or if it is a
* merge and its parents don't simplify to one relevant commit
* (the first two cases are already handled at the beginning of
* this function).
*
* Otherwise, it simplifies to what its sole relevant parent
* simplifies to.
*/
if (!cnt ||
(commit->object.flags & UNINTERESTING) ||
!(commit->object.flags & TREESAME) ||
(parent = one_relevant_parent(revs, commit->parents)) == NULL ||
(revs->show_pulls && (commit->object.flags & PULL_MERGE)))
st->simplified = commit;
else {
pst = locate_simplify_state(revs, parent);
st->simplified = pst->simplified;
}
return tail;
}
static void simplify_merges(struct rev_info *revs)
{
struct commit_list *list, *next;
struct commit_list *yet_to_do, **tail;
struct commit *commit;
if (!revs->prune)
return;
/* feed the list reversed */
yet_to_do = NULL;
for (list = revs->commits; list; list = next) {
commit = list->item;
next = list->next;
/*
* Do not free(list) here yet; the original list
* is used later in this function.
*/
commit_list_insert(commit, &yet_to_do);
}
while (yet_to_do) {
list = yet_to_do;
yet_to_do = NULL;
tail = &yet_to_do;
while (list) {
commit = pop_commit(&list);
tail = simplify_one(revs, commit, tail);
}
}
/* clean up the result, removing the simplified ones */
list = revs->commits;
revs->commits = NULL;
tail = &revs->commits;
while (list) {
struct merge_simplify_state *st;
commit = pop_commit(&list);
st = locate_simplify_state(revs, commit);
if (st->simplified == commit)
tail = &commit_list_insert(commit, tail)->next;
}
}
static void set_children(struct rev_info *revs)
{
struct commit_list *l;
for (l = revs->commits; l; l = l->next) {
struct commit *commit = l->item;
struct commit_list *p;
for (p = commit->parents; p; p = p->next)
add_child(revs, p->item, commit);
}
}
void reset_revision_walk(void)
{
clear_object_flags(SEEN | ADDED | SHOWN | TOPO_WALK_EXPLORED | TOPO_WALK_INDEGREE);
}
static int mark_uninteresting(const struct object_id *oid,
struct packed_git *pack,
uint32_t pos,
void *cb)
{
struct rev_info *revs = cb;
struct object *o = lookup_unknown_object(revs->repo, oid);
o->flags |= UNINTERESTING | SEEN;
return 0;
}
define_commit_slab(indegree_slab, int);
define_commit_slab(author_date_slab, timestamp_t);
struct topo_walk_info {
timestamp_t min_generation;
struct prio_queue explore_queue;
struct prio_queue indegree_queue;
struct prio_queue topo_queue;
struct indegree_slab indegree;
struct author_date_slab author_date;
};
static int topo_walk_atexit_registered;
static unsigned int count_explore_walked;
static unsigned int count_indegree_walked;
static unsigned int count_topo_walked;
static void trace2_topo_walk_statistics_atexit(void)
{
struct json_writer jw = JSON_WRITER_INIT;
jw_object_begin(&jw, 0);
jw_object_intmax(&jw, "count_explore_walked", count_explore_walked);
jw_object_intmax(&jw, "count_indegree_walked", count_indegree_walked);
jw_object_intmax(&jw, "count_topo_walked", count_topo_walked);
jw_end(&jw);
trace2_data_json("topo_walk", the_repository, "statistics", &jw);
jw_release(&jw);
}
static inline void test_flag_and_insert(struct prio_queue *q, struct commit *c, int flag)
{
if (c->object.flags & flag)
return;
c->object.flags |= flag;
prio_queue_put(q, c);
}
static void explore_walk_step(struct rev_info *revs)
{
struct topo_walk_info *info = revs->topo_walk_info;
struct commit_list *p;
struct commit *c = prio_queue_get(&info->explore_queue);
if (!c)
return;
if (repo_parse_commit_gently(revs->repo, c, 1) < 0)
return;
count_explore_walked++;
if (revs->sort_order == REV_SORT_BY_AUTHOR_DATE)
record_author_date(&info->author_date, c);
if (revs->max_age != -1 && (c->date < revs->max_age))
c->object.flags |= UNINTERESTING;
if (process_parents(revs, c, NULL, NULL) < 0)
return;
if (c->object.flags & UNINTERESTING)
mark_parents_uninteresting(revs, c);
for (p = c->parents; p; p = p->next)
test_flag_and_insert(&info->explore_queue, p->item, TOPO_WALK_EXPLORED);
}
static void explore_to_depth(struct rev_info *revs,
timestamp_t gen_cutoff)
{
struct topo_walk_info *info = revs->topo_walk_info;
struct commit *c;
while ((c = prio_queue_peek(&info->explore_queue)) &&
commit_graph_generation(c) >= gen_cutoff)
explore_walk_step(revs);
}
static void indegree_walk_step(struct rev_info *revs)
{
struct commit_list *p;
struct topo_walk_info *info = revs->topo_walk_info;
struct commit *c = prio_queue_get(&info->indegree_queue);
if (!c)
return;
if (repo_parse_commit_gently(revs->repo, c, 1) < 0)
return;
count_indegree_walked++;
explore_to_depth(revs, commit_graph_generation(c));
for (p = c->parents; p; p = p->next) {
struct commit *parent = p->item;
int *pi = indegree_slab_at(&info->indegree, parent);
if (repo_parse_commit_gently(revs->repo, parent, 1) < 0)
return;
if (*pi)
(*pi)++;
else
*pi = 2;
test_flag_and_insert(&info->indegree_queue, parent, TOPO_WALK_INDEGREE);
if (revs->first_parent_only)
return;
}
}
static void compute_indegrees_to_depth(struct rev_info *revs,
timestamp_t gen_cutoff)
{
struct topo_walk_info *info = revs->topo_walk_info;
struct commit *c;
while ((c = prio_queue_peek(&info->indegree_queue)) &&
commit_graph_generation(c) >= gen_cutoff)
indegree_walk_step(revs);
}
static void release_revisions_topo_walk_info(struct topo_walk_info *info)
{
if (!info)
return;
clear_prio_queue(&info->explore_queue);
clear_prio_queue(&info->indegree_queue);
clear_prio_queue(&info->topo_queue);
clear_indegree_slab(&info->indegree);
clear_author_date_slab(&info->author_date);
free(info);
}
static void reset_topo_walk(struct rev_info *revs)
{
release_revisions_topo_walk_info(revs->topo_walk_info);
revs->topo_walk_info = NULL;
}
static void init_topo_walk(struct rev_info *revs)
{
struct topo_walk_info *info;
struct commit_list *list;
if (revs->topo_walk_info)
reset_topo_walk(revs);
revs->topo_walk_info = xmalloc(sizeof(struct topo_walk_info));
info = revs->topo_walk_info;
memset(info, 0, sizeof(struct topo_walk_info));
init_indegree_slab(&info->indegree);
memset(&info->explore_queue, 0, sizeof(info->explore_queue));
memset(&info->indegree_queue, 0, sizeof(info->indegree_queue));
memset(&info->topo_queue, 0, sizeof(info->topo_queue));
switch (revs->sort_order) {
default: /* REV_SORT_IN_GRAPH_ORDER */
info->topo_queue.compare = NULL;
break;
case REV_SORT_BY_COMMIT_DATE:
info->topo_queue.compare = compare_commits_by_commit_date;
break;
case REV_SORT_BY_AUTHOR_DATE:
init_author_date_slab(&info->author_date);
info->topo_queue.compare = compare_commits_by_author_date;
info->topo_queue.cb_data = &info->author_date;
break;
}
info->explore_queue.compare = compare_commits_by_gen_then_commit_date;
info->indegree_queue.compare = compare_commits_by_gen_then_commit_date;
info->min_generation = GENERATION_NUMBER_INFINITY;
for (list = revs->commits; list; list = list->next) {
struct commit *c = list->item;
timestamp_t generation;
if (repo_parse_commit_gently(revs->repo, c, 1))
continue;
test_flag_and_insert(&info->explore_queue, c, TOPO_WALK_EXPLORED);
test_flag_and_insert(&info->indegree_queue, c, TOPO_WALK_INDEGREE);
generation = commit_graph_generation(c);
if (generation < info->min_generation)
info->min_generation = generation;
*(indegree_slab_at(&info->indegree, c)) = 1;
if (revs->sort_order == REV_SORT_BY_AUTHOR_DATE)
record_author_date(&info->author_date, c);
}
compute_indegrees_to_depth(revs, info->min_generation);
for (list = revs->commits; list; list = list->next) {
struct commit *c = list->item;
if (*(indegree_slab_at(&info->indegree, c)) == 1)
prio_queue_put(&info->topo_queue, c);
}
/*
* This is unfortunate; the initial tips need to be shown
* in the order given from the revision traversal machinery.
*/
if (revs->sort_order == REV_SORT_IN_GRAPH_ORDER)
prio_queue_reverse(&info->topo_queue);
if (trace2_is_enabled() && !topo_walk_atexit_registered) {
atexit(trace2_topo_walk_statistics_atexit);
topo_walk_atexit_registered = 1;
}
}
static struct commit *next_topo_commit(struct rev_info *revs)
{
struct commit *c;
struct topo_walk_info *info = revs->topo_walk_info;
/* pop next off of topo_queue */
c = prio_queue_get(&info->topo_queue);
if (c)
*(indegree_slab_at(&info->indegree, c)) = 0;
return c;
}
static void expand_topo_walk(struct rev_info *revs, struct commit *commit)
{
struct commit_list *p;
struct topo_walk_info *info = revs->topo_walk_info;
if (process_parents(revs, commit, NULL, NULL) < 0) {
if (!revs->ignore_missing_links)
die("Failed to traverse parents of commit %s",
oid_to_hex(&commit->object.oid));
}
count_topo_walked++;
for (p = commit->parents; p; p = p->next) {
struct commit *parent = p->item;
int *pi;
timestamp_t generation;
if (parent->object.flags & UNINTERESTING)
continue;
if (repo_parse_commit_gently(revs->repo, parent, 1) < 0)
continue;
generation = commit_graph_generation(parent);
if (generation < info->min_generation) {
info->min_generation = generation;
compute_indegrees_to_depth(revs, info->min_generation);
}
pi = indegree_slab_at(&info->indegree, parent);
(*pi)--;
if (*pi == 1)
prio_queue_put(&info->topo_queue, parent);
if (revs->first_parent_only)
return;
}
}
int prepare_revision_walk(struct rev_info *revs)
{
int i;
struct object_array old_pending;
struct commit_list **next = &revs->commits;
memcpy(&old_pending, &revs->pending, sizeof(old_pending));
revs->pending.nr = 0;
revs->pending.alloc = 0;
revs->pending.objects = NULL;
for (i = 0; i < old_pending.nr; i++) {
struct object_array_entry *e = old_pending.objects + i;
struct commit *commit = handle_commit(revs, e);
if (commit) {
if (!(commit->object.flags & SEEN)) {
commit->object.flags |= SEEN;
next = commit_list_append(commit, next);
}
}
}
object_array_clear(&old_pending);
/* Signal whether we need per-parent treesame decoration */
if (revs->simplify_merges ||
(revs->limited && limiting_can_increase_treesame(revs)))
revs->treesame.name = "treesame";
if (revs->exclude_promisor_objects) {
for_each_packed_object(mark_uninteresting, revs,
FOR_EACH_OBJECT_PROMISOR_ONLY);
}
if (!revs->reflog_info)
prepare_to_use_bloom_filter(revs);
if (!revs->unsorted_input)
commit_list_sort_by_date(&revs->commits);
if (revs->no_walk)
return 0;
if (revs->limited) {
if (limit_list(revs) < 0)
return -1;
if (revs->topo_order)
sort_in_topological_order(&revs->commits, revs->sort_order);
} else if (revs->topo_order)
init_topo_walk(revs);
if (revs->line_level_traverse && want_ancestry(revs))
/*
* At the moment we can only do line-level log with parent
* rewriting by performing this expensive pre-filtering step.
* If parent rewriting is not requested, then we rather
* perform the line-level log filtering during the regular
* history traversal.
*/
line_log_filter(revs);
if (revs->simplify_merges)
simplify_merges(revs);
if (revs->children.name)
set_children(revs);
return 0;
}
static enum rewrite_result rewrite_one_1(struct rev_info *revs,
struct commit **pp,
struct prio_queue *queue)
{
for (;;) {
struct commit *p = *pp;
if (!revs->limited)
if (process_parents(revs, p, NULL, queue) < 0)
return rewrite_one_error;
if (p->object.flags & UNINTERESTING)
return rewrite_one_ok;
if (!(p->object.flags & TREESAME))
return rewrite_one_ok;
if (!p->parents)
return rewrite_one_noparents;
if (!(p = one_relevant_parent(revs, p->parents)))
return rewrite_one_ok;
*pp = p;
}
}
static void merge_queue_into_list(struct prio_queue *q, struct commit_list **list)
{
while (q->nr) {
struct commit *item = prio_queue_peek(q);
struct commit_list *p = *list;
if (p && p->item->date >= item->date)
list = &p->next;
else {
p = commit_list_insert(item, list);
list = &p->next; /* skip newly added item */
prio_queue_get(q); /* pop item */
}
}
}
static enum rewrite_result rewrite_one(struct rev_info *revs, struct commit **pp)
{
struct prio_queue queue = { compare_commits_by_commit_date };
enum rewrite_result ret = rewrite_one_1(revs, pp, &queue);
merge_queue_into_list(&queue, &revs->commits);
clear_prio_queue(&queue);
return ret;
}
int rewrite_parents(struct rev_info *revs, struct commit *commit,
rewrite_parent_fn_t rewrite_parent)
{
struct commit_list **pp = &commit->parents;
while (*pp) {
struct commit_list *parent = *pp;
switch (rewrite_parent(revs, &parent->item)) {
case rewrite_one_ok:
break;
case rewrite_one_noparents:
*pp = parent->next;
continue;
case rewrite_one_error:
return -1;
}
pp = &parent->next;
}
remove_duplicate_parents(revs, commit);
return 0;
}
static int commit_match(struct commit *commit, struct rev_info *opt)
{
int retval;
const char *encoding;
const char *message;
struct strbuf buf = STRBUF_INIT;
if (!opt->grep_filter.pattern_list && !opt->grep_filter.header_list)
return 1;
/* Prepend "fake" headers as needed */
if (opt->grep_filter.use_reflog_filter) {
strbuf_addstr(&buf, "reflog ");
get_reflog_message(&buf, opt->reflog_info);
strbuf_addch(&buf, '\n');
}
/*
* We grep in the user's output encoding, under the assumption that it
* is the encoding they are most likely to write their grep pattern
* for. In addition, it means we will match the "notes" encoding below,
* so we will not end up with a buffer that has two different encodings
* in it.
*/
encoding = get_log_output_encoding();
message = logmsg_reencode(commit, NULL, encoding);
/* Copy the commit to temporary if we are using "fake" headers */
if (buf.len)
strbuf_addstr(&buf, message);
if (opt->grep_filter.header_list && opt->mailmap) {
const char *commit_headers[] = { "author ", "committer ", NULL };
if (!buf.len)
strbuf_addstr(&buf, message);
apply_mailmap_to_header(&buf, commit_headers, opt->mailmap);
}
/* Append "fake" message parts as needed */
if (opt->show_notes) {
if (!buf.len)
strbuf_addstr(&buf, message);
format_display_notes(&commit->object.oid, &buf, encoding, 1);
}
/*
* Find either in the original commit message, or in the temporary.
* Note that we cast away the constness of "message" here. It is
* const because it may come from the cached commit buffer. That's OK,
* because we know that it is modifiable heap memory, and that while
* grep_buffer may modify it for speed, it will restore any
* changes before returning.
*/
if (buf.len)
retval = grep_buffer(&opt->grep_filter, buf.buf, buf.len);
else
retval = grep_buffer(&opt->grep_filter,
(char *)message, strlen(message));
strbuf_release(&buf);
unuse_commit_buffer(commit, message);
return retval;
}
static inline int want_ancestry(const struct rev_info *revs)
{
return (revs->rewrite_parents || revs->children.name);
}
/*
* Return a timestamp to be used for --since/--until comparisons for this
* commit, based on the revision options.
*/
static timestamp_t comparison_date(const struct rev_info *revs,
struct commit *commit)
{
return revs->reflog_info ?
get_reflog_timestamp(revs->reflog_info) :
commit->date;
}
enum commit_action get_commit_action(struct rev_info *revs, struct commit *commit)
{
if (commit->object.flags & SHOWN)
return commit_ignore;
if (revs->unpacked && has_object_pack(&commit->object.oid))
return commit_ignore;
if (revs->no_kept_objects) {
if (has_object_kept_pack(&commit->object.oid,
revs->keep_pack_cache_flags))
return commit_ignore;
}
if (commit->object.flags & UNINTERESTING)
return commit_ignore;
if (revs->line_level_traverse && !want_ancestry(revs)) {
/*
* In case of line-level log with parent rewriting
* prepare_revision_walk() already took care of all line-level
* log filtering, and there is nothing left to do here.
*
* If parent rewriting was not requested, then this is the
* place to perform the line-level log filtering. Notably,
* this check, though expensive, must come before the other,
* cheaper filtering conditions, because the tracked line
* ranges must be adjusted even when the commit will end up
* being ignored based on other conditions.
*/
if (!line_log_process_ranges_arbitrary_commit(revs, commit))
return commit_ignore;
}
if (revs->min_age != -1 &&
comparison_date(revs, commit) > revs->min_age)
return commit_ignore;
if (revs->max_age_as_filter != -1 &&
comparison_date(revs, commit) < revs->max_age_as_filter)
return commit_ignore;
if (revs->min_parents || (revs->max_parents >= 0)) {
int n = commit_list_count(commit->parents);
if ((n < revs->min_parents) ||
((revs->max_parents >= 0) && (n > revs->max_parents)))
return commit_ignore;
}
if (!commit_match(commit, revs))
return commit_ignore;
if (revs->prune && revs->dense) {
/* Commit without changes? */
if (commit->object.flags & TREESAME) {
int n;
struct commit_list *p;
/* drop merges unless we want parenthood */
if (!want_ancestry(revs))
return commit_ignore;
if (revs->show_pulls && (commit->object.flags & PULL_MERGE))
return commit_show;
/*
* If we want ancestry, then need to keep any merges
* between relevant commits to tie together topology.
* For consistency with TREESAME and simplification
* use "relevant" here rather than just INTERESTING,
* to treat bottom commit(s) as part of the topology.
*/
for (n = 0, p = commit->parents; p; p = p->next)
if (relevant_commit(p->item))
if (++n >= 2)
return commit_show;
return commit_ignore;
}
}
return commit_show;
}
define_commit_slab(saved_parents, struct commit_list *);
#define EMPTY_PARENT_LIST ((struct commit_list *)-1)
/*
* You may only call save_parents() once per commit (this is checked
* for non-root commits).
*/
static void save_parents(struct rev_info *revs, struct commit *commit)
{
struct commit_list **pp;
if (!revs->saved_parents_slab) {
revs->saved_parents_slab = xmalloc(sizeof(struct saved_parents));
init_saved_parents(revs->saved_parents_slab);
}
pp = saved_parents_at(revs->saved_parents_slab, commit);
/*
* When walking with reflogs, we may visit the same commit
* several times: once for each appearance in the reflog.
*
* In this case, save_parents() will be called multiple times.
* We want to keep only the first set of parents. We need to
* store a sentinel value for an empty (i.e., NULL) parent
* list to distinguish it from a not-yet-saved list, however.
*/
if (*pp)
return;
if (commit->parents)
*pp = copy_commit_list(commit->parents);
else
*pp = EMPTY_PARENT_LIST;
}
static void free_saved_parents(struct rev_info *revs)
{
if (revs->saved_parents_slab)
clear_saved_parents(revs->saved_parents_slab);
}
struct commit_list *get_saved_parents(struct rev_info *revs, const struct commit *commit)
{
struct commit_list *parents;
if (!revs->saved_parents_slab)
return commit->parents;
parents = *saved_parents_at(revs->saved_parents_slab, commit);
if (parents == EMPTY_PARENT_LIST)
return NULL;
return parents;
}
enum commit_action simplify_commit(struct rev_info *revs, struct commit *commit)
{
enum commit_action action = get_commit_action(revs, commit);
if (action == commit_show &&
revs->prune && revs->dense && want_ancestry(revs)) {
/*
* --full-diff on simplified parents is no good: it
* will show spurious changes from the commits that
* were elided. So we save the parents on the side
* when --full-diff is in effect.
*/
if (revs->full_diff)
save_parents(revs, commit);
if (rewrite_parents(revs, commit, rewrite_one) < 0)
return commit_error;
}
return action;
}
static void track_linear(struct rev_info *revs, struct commit *commit)
{
if (revs->track_first_time) {
revs->linear = 1;
revs->track_first_time = 0;
} else {
struct commit_list *p;
for (p = revs->previous_parents; p; p = p->next)
if (p->item == NULL || /* first commit */
oideq(&p->item->object.oid, &commit->object.oid))
break;
revs->linear = p != NULL;
}
if (revs->reverse) {
if (revs->linear)
commit->object.flags |= TRACK_LINEAR;
}
free_commit_list(revs->previous_parents);
revs->previous_parents = copy_commit_list(commit->parents);
}
static struct commit *get_revision_1(struct rev_info *revs)
{
while (1) {
struct commit *commit;
if (revs->reflog_info)
commit = next_reflog_entry(revs->reflog_info);
else if (revs->topo_walk_info)
commit = next_topo_commit(revs);
else
commit = pop_commit(&revs->commits);
if (!commit)
return NULL;
if (revs->reflog_info)
commit->object.flags &= ~(ADDED | SEEN | SHOWN);
/*
* If we haven't done the list limiting, we need to look at
* the parents here. We also need to do the date-based limiting
* that we'd otherwise have done in limit_list().
*/
if (!revs->limited) {
if (revs->max_age != -1 &&
comparison_date(revs, commit) < revs->max_age)
continue;
if (revs->reflog_info)
try_to_simplify_commit(revs, commit);
else if (revs->topo_walk_info)
expand_topo_walk(revs, commit);
else if (process_parents(revs, commit, &revs->commits, NULL) < 0) {
if (!revs->ignore_missing_links)
die("Failed to traverse parents of commit %s",
oid_to_hex(&commit->object.oid));
}
}
switch (simplify_commit(revs, commit)) {
case commit_ignore:
continue;
case commit_error:
die("Failed to simplify parents of commit %s",
oid_to_hex(&commit->object.oid));
default:
if (revs->track_linear)
track_linear(revs, commit);
return commit;
}
}
}
/*
* Return true for entries that have not yet been shown. (This is an
* object_array_each_func_t.)
*/
static int entry_unshown(struct object_array_entry *entry, void *cb_data_unused)
{
return !(entry->item->flags & SHOWN);
}
/*
* If array is on the verge of a realloc, garbage-collect any entries
* that have already been shown to try to free up some space.
*/
static void gc_boundary(struct object_array *array)
{
if (array->nr == array->alloc)
object_array_filter(array, entry_unshown, NULL);
}
static void create_boundary_commit_list(struct rev_info *revs)
{
unsigned i;
struct commit *c;
struct object_array *array = &revs->boundary_commits;
struct object_array_entry *objects = array->objects;
/*
* If revs->commits is non-NULL at this point, an error occurred in
* get_revision_1(). Ignore the error and continue printing the
* boundary commits anyway. (This is what the code has always
* done.)
*/
free_commit_list(revs->commits);
revs->commits = NULL;
/*
* Put all of the actual boundary commits from revs->boundary_commits
* into revs->commits
*/
for (i = 0; i < array->nr; i++) {
c = (struct commit *)(objects[i].item);
if (!c)
continue;
if (!(c->object.flags & CHILD_SHOWN))
continue;
if (c->object.flags & (SHOWN | BOUNDARY))
continue;
c->object.flags |= BOUNDARY;
commit_list_insert(c, &revs->commits);
}
/*
* If revs->topo_order is set, sort the boundary commits
* in topological order
*/
sort_in_topological_order(&revs->commits, revs->sort_order);
}
static struct commit *get_revision_internal(struct rev_info *revs)
{
struct commit *c = NULL;
struct commit_list *l;
if (revs->boundary == 2) {
/*
* All of the normal commits have already been returned,
* and we are now returning boundary commits.
* create_boundary_commit_list() has populated
* revs->commits with the remaining commits to return.
*/
c = pop_commit(&revs->commits);
if (c)
c->object.flags |= SHOWN;
return c;
}
/*
* If our max_count counter has reached zero, then we are done. We
* don't simply return NULL because we still might need to show
* boundary commits. But we want to avoid calling get_revision_1, which
* might do a considerable amount of work finding the next commit only
* for us to throw it away.
*
* If it is non-zero, then either we don't have a max_count at all
* (-1), or it is still counting, in which case we decrement.
*/
if (revs->max_count) {
c = get_revision_1(revs);
if (c) {
while (revs->skip_count > 0) {
revs->skip_count--;
c = get_revision_1(revs);
if (!c)
break;
}
}
if (revs->max_count > 0)
revs->max_count--;
}
if (c)
c->object.flags |= SHOWN;
if (!revs->boundary)
return c;
if (!c) {
/*
* get_revision_1() runs out the commits, and
* we are done computing the boundaries.
* switch to boundary commits output mode.
*/
revs->boundary = 2;
/*
* Update revs->commits to contain the list of
* boundary commits.
*/
create_boundary_commit_list(revs);
return get_revision_internal(revs);
}
/*
* boundary commits are the commits that are parents of the
* ones we got from get_revision_1() but they themselves are
* not returned from get_revision_1(). Before returning
* 'c', we need to mark its parents that they could be boundaries.
*/
for (l = c->parents; l; l = l->next) {
struct object *p;
p = &(l->item->object);
if (p->flags & (CHILD_SHOWN | SHOWN))
continue;
p->flags |= CHILD_SHOWN;
gc_boundary(&revs->boundary_commits);
add_object_array(p, NULL, &revs->boundary_commits);
}
return c;
}
struct commit *get_revision(struct rev_info *revs)
{
struct commit *c;
struct commit_list *reversed;
if (revs->reverse) {
reversed = NULL;
while ((c = get_revision_internal(revs)))
commit_list_insert(c, &reversed);
revs->commits = reversed;
revs->reverse = 0;
revs->reverse_output_stage = 1;
}
if (revs->reverse_output_stage) {
c = pop_commit(&revs->commits);
if (revs->track_linear)
revs->linear = !!(c && c->object.flags & TRACK_LINEAR);
return c;
}
c = get_revision_internal(revs);
if (c && revs->graph)
graph_update(revs->graph, c);
if (!c) {
free_saved_parents(revs);
free_commit_list(revs->previous_parents);
revs->previous_parents = NULL;
}
return c;
}
const char *get_revision_mark(const struct rev_info *revs, const struct commit *commit)
{
if (commit->object.flags & BOUNDARY)
return "-";
else if (commit->object.flags & UNINTERESTING)
return "^";
else if (commit->object.flags & PATCHSAME)
return "=";
else if (!revs || revs->left_right) {
if (commit->object.flags & SYMMETRIC_LEFT)
return "<";
else
return ">";
} else if (revs->graph)
return "*";
else if (revs->cherry_mark)
return "+";
return "";
}
void put_revision_mark(const struct rev_info *revs, const struct commit *commit)
{
const char *mark = get_revision_mark(revs, commit);
if (!strlen(mark))
return;
fputs(mark, stdout);
putchar(' ');
}
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