mirror of
https://github.com/git/git
synced 2024-10-29 17:08:46 +00:00
c4e05b1a22
This makes things that include revision.h build again. Blame is also built, but I am not sure how well it works (or how well it worked to begin with) -- it was relying on tree-diff to be using whatever pathspec was used the last time, which smells a bit suspicious. Signed-off-by: Junio C Hamano <junkio@cox.net>
808 lines
19 KiB
C
808 lines
19 KiB
C
#include "cache.h"
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#include "tag.h"
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#include "blob.h"
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#include "tree.h"
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#include "commit.h"
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#include "diff.h"
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#include "refs.h"
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#include "revision.h"
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static char *path_name(struct name_path *path, const char *name)
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{
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struct name_path *p;
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char *n, *m;
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int nlen = strlen(name);
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int len = nlen + 1;
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for (p = path; p; p = p->up) {
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if (p->elem_len)
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len += p->elem_len + 1;
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}
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n = xmalloc(len);
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m = n + len - (nlen + 1);
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strcpy(m, name);
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for (p = path; p; p = p->up) {
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if (p->elem_len) {
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m -= p->elem_len + 1;
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memcpy(m, p->elem, p->elem_len);
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m[p->elem_len] = '/';
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}
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}
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return n;
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}
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struct object_list **add_object(struct object *obj,
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struct object_list **p,
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struct name_path *path,
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const char *name)
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{
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struct object_list *entry = xmalloc(sizeof(*entry));
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entry->item = obj;
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entry->next = *p;
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entry->name = path_name(path, name);
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*p = entry;
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return &entry->next;
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}
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static void mark_blob_uninteresting(struct blob *blob)
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{
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if (blob->object.flags & UNINTERESTING)
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return;
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blob->object.flags |= UNINTERESTING;
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}
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void mark_tree_uninteresting(struct tree *tree)
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{
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struct object *obj = &tree->object;
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struct tree_entry_list *entry;
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if (obj->flags & UNINTERESTING)
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return;
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obj->flags |= UNINTERESTING;
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if (!has_sha1_file(obj->sha1))
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return;
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if (parse_tree(tree) < 0)
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die("bad tree %s", sha1_to_hex(obj->sha1));
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entry = tree->entries;
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tree->entries = NULL;
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while (entry) {
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struct tree_entry_list *next = entry->next;
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if (entry->directory)
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mark_tree_uninteresting(entry->item.tree);
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else
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mark_blob_uninteresting(entry->item.blob);
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free(entry);
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entry = next;
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}
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}
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void mark_parents_uninteresting(struct commit *commit)
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{
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struct commit_list *parents = commit->parents;
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while (parents) {
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struct commit *commit = parents->item;
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if (!(commit->object.flags & UNINTERESTING)) {
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commit->object.flags |= UNINTERESTING;
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/*
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* Normally we haven't parsed the parent
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* yet, so we won't have a parent of a parent
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* here. However, it may turn out that we've
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* reached this commit some other way (where it
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* wasn't uninteresting), in which case we need
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* to mark its parents recursively too..
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*/
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if (commit->parents)
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mark_parents_uninteresting(commit);
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}
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/*
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* A missing commit is ok iff its parent is marked
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* uninteresting.
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*
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* We just mark such a thing parsed, so that when
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* it is popped next time around, we won't be trying
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* to parse it and get an error.
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*/
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if (!has_sha1_file(commit->object.sha1))
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commit->object.parsed = 1;
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parents = parents->next;
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}
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}
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static void add_pending_object(struct rev_info *revs, struct object *obj, const char *name)
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{
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add_object(obj, &revs->pending_objects, NULL, name);
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}
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static struct commit *get_commit_reference(struct rev_info *revs, const char *name, const unsigned char *sha1, unsigned int flags)
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{
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struct object *object;
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object = parse_object(sha1);
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if (!object)
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die("bad object %s", name);
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/*
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* Tag object? Look what it points to..
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*/
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while (object->type == tag_type) {
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struct tag *tag = (struct tag *) object;
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object->flags |= flags;
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if (revs->tag_objects && !(object->flags & UNINTERESTING))
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add_pending_object(revs, object, tag->tag);
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object = parse_object(tag->tagged->sha1);
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if (!object)
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die("bad object %s", sha1_to_hex(tag->tagged->sha1));
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}
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/*
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* Commit object? Just return it, we'll do all the complex
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* reachability crud.
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*/
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if (object->type == commit_type) {
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struct commit *commit = (struct commit *)object;
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object->flags |= flags;
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if (parse_commit(commit) < 0)
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die("unable to parse commit %s", name);
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if (flags & UNINTERESTING) {
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mark_parents_uninteresting(commit);
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revs->limited = 1;
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}
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return commit;
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}
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/*
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* Tree object? Either mark it uniniteresting, or add it
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* to the list of objects to look at later..
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*/
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if (object->type == tree_type) {
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struct tree *tree = (struct tree *)object;
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if (!revs->tree_objects)
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return NULL;
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if (flags & UNINTERESTING) {
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mark_tree_uninteresting(tree);
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return NULL;
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}
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add_pending_object(revs, object, "");
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return NULL;
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}
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/*
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* Blob object? You know the drill by now..
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*/
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if (object->type == blob_type) {
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struct blob *blob = (struct blob *)object;
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if (!revs->blob_objects)
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return NULL;
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if (flags & UNINTERESTING) {
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mark_blob_uninteresting(blob);
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return NULL;
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}
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add_pending_object(revs, object, "");
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return NULL;
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}
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die("%s is unknown object", name);
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}
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static int everybody_uninteresting(struct commit_list *orig)
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{
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struct commit_list *list = orig;
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while (list) {
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struct commit *commit = list->item;
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list = list->next;
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if (commit->object.flags & UNINTERESTING)
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continue;
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return 0;
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}
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return 1;
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}
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static int tree_difference = REV_TREE_SAME;
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static void file_add_remove(struct diff_options *options,
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int addremove, unsigned mode,
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const unsigned char *sha1,
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const char *base, const char *path)
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{
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int diff = REV_TREE_DIFFERENT;
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/*
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* Is it an add of a new file? It means that the old tree
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* didn't have it at all, so we will turn "REV_TREE_SAME" ->
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* "REV_TREE_NEW", but leave any "REV_TREE_DIFFERENT" alone
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* (and if it already was "REV_TREE_NEW", we'll keep it
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* "REV_TREE_NEW" of course).
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*/
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if (addremove == '+') {
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diff = tree_difference;
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if (diff != REV_TREE_SAME)
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return;
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diff = REV_TREE_NEW;
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}
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tree_difference = diff;
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}
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static void file_change(struct diff_options *options,
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unsigned old_mode, unsigned new_mode,
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const unsigned char *old_sha1,
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const unsigned char *new_sha1,
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const char *base, const char *path)
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{
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tree_difference = REV_TREE_DIFFERENT;
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}
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int rev_compare_tree(struct rev_info *revs, struct tree *t1, struct tree *t2)
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{
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if (!t1)
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return REV_TREE_NEW;
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if (!t2)
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return REV_TREE_DIFFERENT;
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tree_difference = REV_TREE_SAME;
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if (diff_tree_sha1(t1->object.sha1, t2->object.sha1, "",
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&revs->diffopt) < 0)
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return REV_TREE_DIFFERENT;
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return tree_difference;
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}
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int rev_same_tree_as_empty(struct rev_info *revs, struct tree *t1)
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{
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int retval;
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void *tree;
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struct tree_desc empty, real;
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if (!t1)
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return 0;
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tree = read_object_with_reference(t1->object.sha1, tree_type, &real.size, NULL);
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if (!tree)
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return 0;
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real.buf = tree;
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empty.buf = "";
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empty.size = 0;
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tree_difference = 0;
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retval = diff_tree(&empty, &real, "", &revs->diffopt);
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free(tree);
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return retval >= 0 && !tree_difference;
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}
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static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
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{
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struct commit_list **pp, *parent;
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int tree_changed = 0;
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if (!commit->tree)
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return;
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if (!commit->parents) {
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if (!rev_same_tree_as_empty(revs, commit->tree))
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commit->object.flags |= TREECHANGE;
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return;
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}
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pp = &commit->parents;
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while ((parent = *pp) != NULL) {
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struct commit *p = parent->item;
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parse_commit(p);
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switch (rev_compare_tree(revs, p->tree, commit->tree)) {
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case REV_TREE_SAME:
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if (p->object.flags & UNINTERESTING) {
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/* Even if a merge with an uninteresting
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* side branch brought the entire change
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* we are interested in, we do not want
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* to lose the other branches of this
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* merge, so we just keep going.
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*/
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pp = &parent->next;
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continue;
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}
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parent->next = NULL;
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commit->parents = parent;
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return;
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case REV_TREE_NEW:
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if (revs->remove_empty_trees &&
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rev_same_tree_as_empty(revs, p->tree)) {
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/* We are adding all the specified
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* paths from this parent, so the
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* history beyond this parent is not
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* interesting. Remove its parents
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* (they are grandparents for us).
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* IOW, we pretend this parent is a
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* "root" commit.
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*/
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parse_commit(p);
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p->parents = NULL;
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}
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/* fallthrough */
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case REV_TREE_DIFFERENT:
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tree_changed = 1;
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pp = &parent->next;
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continue;
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}
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die("bad tree compare for commit %s", sha1_to_hex(commit->object.sha1));
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}
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if (tree_changed)
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commit->object.flags |= TREECHANGE;
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}
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static void add_parents_to_list(struct rev_info *revs, struct commit *commit, struct commit_list **list)
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{
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struct commit_list *parent = commit->parents;
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if (commit->object.flags & ADDED)
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return;
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commit->object.flags |= ADDED;
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/*
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* If the commit is uninteresting, don't try to
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* prune parents - we want the maximal uninteresting
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* set.
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*
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* Normally we haven't parsed the parent
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* yet, so we won't have a parent of a parent
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* here. However, it may turn out that we've
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* reached this commit some other way (where it
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* wasn't uninteresting), in which case we need
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* to mark its parents recursively too..
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*/
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if (commit->object.flags & UNINTERESTING) {
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while (parent) {
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struct commit *p = parent->item;
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parent = parent->next;
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parse_commit(p);
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p->object.flags |= UNINTERESTING;
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if (p->parents)
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mark_parents_uninteresting(p);
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if (p->object.flags & SEEN)
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continue;
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p->object.flags |= SEEN;
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insert_by_date(p, list);
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}
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return;
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}
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/*
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* Ok, the commit wasn't uninteresting. Try to
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* simplify the commit history and find the parent
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* that has no differences in the path set if one exists.
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*/
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if (revs->prune_fn)
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revs->prune_fn(revs, commit);
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parent = commit->parents;
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while (parent) {
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struct commit *p = parent->item;
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parent = parent->next;
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parse_commit(p);
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if (p->object.flags & SEEN)
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continue;
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p->object.flags |= SEEN;
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insert_by_date(p, list);
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}
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}
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static void limit_list(struct rev_info *revs)
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{
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struct commit_list *list = revs->commits;
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struct commit_list *newlist = NULL;
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struct commit_list **p = &newlist;
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while (list) {
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struct commit_list *entry = list;
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struct commit *commit = list->item;
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struct object *obj = &commit->object;
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list = list->next;
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free(entry);
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if (revs->max_age != -1 && (commit->date < revs->max_age))
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obj->flags |= UNINTERESTING;
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if (revs->unpacked && has_sha1_pack(obj->sha1))
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obj->flags |= UNINTERESTING;
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add_parents_to_list(revs, commit, &list);
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if (obj->flags & UNINTERESTING) {
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mark_parents_uninteresting(commit);
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if (everybody_uninteresting(list))
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break;
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continue;
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}
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if (revs->min_age != -1 && (commit->date > revs->min_age))
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continue;
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p = &commit_list_insert(commit, p)->next;
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}
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if (revs->boundary) {
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/* mark the ones that are on the result list first */
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for (list = newlist; list; list = list->next) {
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struct commit *commit = list->item;
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commit->object.flags |= TMP_MARK;
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}
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for (list = newlist; list; list = list->next) {
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struct commit *commit = list->item;
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struct object *obj = &commit->object;
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struct commit_list *parent;
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if (obj->flags & UNINTERESTING)
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continue;
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for (parent = commit->parents;
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parent;
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parent = parent->next) {
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struct commit *pcommit = parent->item;
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if (!(pcommit->object.flags & UNINTERESTING))
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continue;
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pcommit->object.flags |= BOUNDARY;
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if (pcommit->object.flags & TMP_MARK)
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continue;
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pcommit->object.flags |= TMP_MARK;
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p = &commit_list_insert(pcommit, p)->next;
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}
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}
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for (list = newlist; list; list = list->next) {
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struct commit *commit = list->item;
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commit->object.flags &= ~TMP_MARK;
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}
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}
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revs->commits = newlist;
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}
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static void add_one_commit(struct commit *commit, struct rev_info *revs)
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{
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if (!commit || (commit->object.flags & SEEN))
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return;
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commit->object.flags |= SEEN;
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commit_list_insert(commit, &revs->commits);
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}
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static int all_flags;
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static struct rev_info *all_revs;
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static int handle_one_ref(const char *path, const unsigned char *sha1)
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{
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struct commit *commit = get_commit_reference(all_revs, path, sha1, all_flags);
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add_one_commit(commit, all_revs);
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return 0;
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}
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static void handle_all(struct rev_info *revs, unsigned flags)
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{
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all_revs = revs;
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all_flags = flags;
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for_each_ref(handle_one_ref);
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}
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void init_revisions(struct rev_info *revs)
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{
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memset(revs, 0, sizeof(*revs));
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revs->diffopt.recursive = 1;
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revs->diffopt.add_remove = file_add_remove;
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revs->diffopt.change = file_change;
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revs->lifo = 1;
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revs->dense = 1;
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revs->prefix = setup_git_directory();
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revs->max_age = -1;
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revs->min_age = -1;
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revs->max_count = -1;
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revs->prune_fn = NULL;
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revs->prune_data = NULL;
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revs->topo_setter = topo_sort_default_setter;
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revs->topo_getter = topo_sort_default_getter;
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}
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/*
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* Parse revision information, filling in the "rev_info" structure,
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* and removing the used arguments from the argument list.
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*
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* Returns the number of arguments left that weren't recognized
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* (which are also moved to the head of the argument list)
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*/
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int setup_revisions(int argc, const char **argv, struct rev_info *revs, const char *def)
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{
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int i, flags, seen_dashdash;
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const char **unrecognized = argv + 1;
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int left = 1;
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init_revisions(revs);
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/* First, search for "--" */
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seen_dashdash = 0;
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for (i = 1; i < argc; i++) {
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const char *arg = argv[i];
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if (strcmp(arg, "--"))
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continue;
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argv[i] = NULL;
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argc = i;
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revs->prune_data = get_pathspec(revs->prefix, argv + i + 1);
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seen_dashdash = 1;
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break;
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}
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flags = 0;
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for (i = 1; i < argc; i++) {
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struct commit *commit;
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const char *arg = argv[i];
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unsigned char sha1[20];
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char *dotdot;
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int local_flags;
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if (*arg == '-') {
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if (!strncmp(arg, "--max-count=", 12)) {
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revs->max_count = atoi(arg + 12);
|
|
continue;
|
|
}
|
|
/* accept -<digit>, like traditilnal "head" */
|
|
if ((*arg == '-') && isdigit(arg[1])) {
|
|
revs->max_count = atoi(arg + 1);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "-n")) {
|
|
if (argc <= i + 1)
|
|
die("-n requires an argument");
|
|
revs->max_count = atoi(argv[++i]);
|
|
continue;
|
|
}
|
|
if (!strncmp(arg,"-n",2)) {
|
|
revs->max_count = atoi(arg + 2);
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "--max-age=", 10)) {
|
|
revs->max_age = atoi(arg + 10);
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "--since=", 8)) {
|
|
revs->max_age = approxidate(arg + 8);
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "--after=", 8)) {
|
|
revs->max_age = approxidate(arg + 8);
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "--min-age=", 10)) {
|
|
revs->min_age = atoi(arg + 10);
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "--before=", 9)) {
|
|
revs->min_age = approxidate(arg + 9);
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "--until=", 8)) {
|
|
revs->min_age = approxidate(arg + 8);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--all")) {
|
|
handle_all(revs, flags);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--not")) {
|
|
flags ^= UNINTERESTING;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--default")) {
|
|
if (++i >= argc)
|
|
die("bad --default argument");
|
|
def = argv[i];
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--topo-order")) {
|
|
revs->topo_order = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--date-order")) {
|
|
revs->lifo = 0;
|
|
revs->topo_order = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--parents")) {
|
|
revs->parents = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--dense")) {
|
|
revs->dense = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--sparse")) {
|
|
revs->dense = 0;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--remove-empty")) {
|
|
revs->remove_empty_trees = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--no-merges")) {
|
|
revs->no_merges = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--boundary")) {
|
|
revs->boundary = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--objects")) {
|
|
revs->tag_objects = 1;
|
|
revs->tree_objects = 1;
|
|
revs->blob_objects = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--objects-edge")) {
|
|
revs->tag_objects = 1;
|
|
revs->tree_objects = 1;
|
|
revs->blob_objects = 1;
|
|
revs->edge_hint = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--unpacked")) {
|
|
revs->unpacked = 1;
|
|
continue;
|
|
}
|
|
*unrecognized++ = arg;
|
|
left++;
|
|
continue;
|
|
}
|
|
dotdot = strstr(arg, "..");
|
|
if (dotdot) {
|
|
unsigned char from_sha1[20];
|
|
const char *next = dotdot + 2;
|
|
const char *this = arg;
|
|
*dotdot = 0;
|
|
if (!*next)
|
|
next = "HEAD";
|
|
if (dotdot == arg)
|
|
this = "HEAD";
|
|
if (!get_sha1(this, from_sha1) &&
|
|
!get_sha1(next, sha1)) {
|
|
struct commit *exclude;
|
|
struct commit *include;
|
|
|
|
exclude = get_commit_reference(revs, this, from_sha1, flags ^ UNINTERESTING);
|
|
include = get_commit_reference(revs, next, sha1, flags);
|
|
if (!exclude || !include)
|
|
die("Invalid revision range %s..%s", arg, next);
|
|
add_one_commit(exclude, revs);
|
|
add_one_commit(include, revs);
|
|
continue;
|
|
}
|
|
*dotdot = '.';
|
|
}
|
|
local_flags = 0;
|
|
if (*arg == '^') {
|
|
local_flags = UNINTERESTING;
|
|
arg++;
|
|
}
|
|
if (get_sha1(arg, sha1) < 0) {
|
|
struct stat st;
|
|
int j;
|
|
|
|
if (seen_dashdash || local_flags)
|
|
die("bad revision '%s'", arg);
|
|
|
|
/* If we didn't have a "--", all filenames must exist */
|
|
for (j = i; j < argc; j++) {
|
|
if (lstat(argv[j], &st) < 0)
|
|
die("'%s': %s", argv[j], strerror(errno));
|
|
}
|
|
revs->prune_data = get_pathspec(revs->prefix, argv + i);
|
|
break;
|
|
}
|
|
commit = get_commit_reference(revs, arg, sha1, flags ^ local_flags);
|
|
add_one_commit(commit, revs);
|
|
}
|
|
if (def && !revs->commits) {
|
|
unsigned char sha1[20];
|
|
struct commit *commit;
|
|
if (get_sha1(def, sha1) < 0)
|
|
die("bad default revision '%s'", def);
|
|
commit = get_commit_reference(revs, def, sha1, 0);
|
|
add_one_commit(commit, revs);
|
|
}
|
|
|
|
if (revs->topo_order || revs->unpacked)
|
|
revs->limited = 1;
|
|
|
|
if (revs->prune_data) {
|
|
diff_tree_setup_paths(revs->prune_data, &revs->diffopt);
|
|
revs->prune_fn = try_to_simplify_commit;
|
|
}
|
|
|
|
return left;
|
|
}
|
|
|
|
void prepare_revision_walk(struct rev_info *revs)
|
|
{
|
|
sort_by_date(&revs->commits);
|
|
if (revs->limited)
|
|
limit_list(revs);
|
|
if (revs->topo_order)
|
|
sort_in_topological_order_fn(&revs->commits, revs->lifo,
|
|
revs->topo_setter,
|
|
revs->topo_getter);
|
|
}
|
|
|
|
static int rewrite_one(struct rev_info *revs, struct commit **pp)
|
|
{
|
|
for (;;) {
|
|
struct commit *p = *pp;
|
|
if (!revs->limited)
|
|
add_parents_to_list(revs, p, &revs->commits);
|
|
if (p->object.flags & (TREECHANGE | UNINTERESTING))
|
|
return 0;
|
|
if (!p->parents)
|
|
return -1;
|
|
*pp = p->parents->item;
|
|
}
|
|
}
|
|
|
|
static void rewrite_parents(struct rev_info *revs, struct commit *commit)
|
|
{
|
|
struct commit_list **pp = &commit->parents;
|
|
while (*pp) {
|
|
struct commit_list *parent = *pp;
|
|
if (rewrite_one(revs, &parent->item) < 0) {
|
|
*pp = parent->next;
|
|
continue;
|
|
}
|
|
pp = &parent->next;
|
|
}
|
|
}
|
|
|
|
struct commit *get_revision(struct rev_info *revs)
|
|
{
|
|
struct commit_list *list = revs->commits;
|
|
|
|
if (!list)
|
|
return NULL;
|
|
|
|
/* Check the max_count ... */
|
|
switch (revs->max_count) {
|
|
case -1:
|
|
break;
|
|
case 0:
|
|
return NULL;
|
|
default:
|
|
revs->max_count--;
|
|
}
|
|
|
|
do {
|
|
struct commit *commit = revs->commits->item;
|
|
|
|
revs->commits = revs->commits->next;
|
|
|
|
/*
|
|
* 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->unpacked &&
|
|
has_sha1_pack(commit->object.sha1)) ||
|
|
(revs->max_age != -1 &&
|
|
(commit->date < revs->max_age)))
|
|
continue;
|
|
add_parents_to_list(revs, commit, &revs->commits);
|
|
}
|
|
if (commit->object.flags & SHOWN)
|
|
continue;
|
|
if (!(commit->object.flags & BOUNDARY) &&
|
|
(commit->object.flags & UNINTERESTING))
|
|
continue;
|
|
if (revs->min_age != -1 && (commit->date > revs->min_age))
|
|
continue;
|
|
if (revs->no_merges &&
|
|
commit->parents && commit->parents->next)
|
|
continue;
|
|
if (revs->prune_fn && revs->dense) {
|
|
if (!(commit->object.flags & TREECHANGE))
|
|
continue;
|
|
if (revs->parents)
|
|
rewrite_parents(revs, commit);
|
|
}
|
|
commit->object.flags |= SHOWN;
|
|
return commit;
|
|
} while (revs->commits);
|
|
return NULL;
|
|
}
|