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![Junio C Hamano](/assets/img/avatar_default.png)
This ports the following options from rev-list based git-log implementation: * -<n>, -n<n>, and -n <n>. I am still wondering if we want this natively supported by setup_revisions(), which already takes --max-count. We may want to move them in the next round. Also I am not sure if we can get away with not setting revs->limited when we set max-count. The latest rev-list.c and revision.c in this series do not, so I left them as they are. * --pretty and --pretty=<fmt>. * --abbrev=<n> and --no-abbrev. The previous commit already handles time-based limiters (--since, --until and friends). The remaining things that rev-list based git-log happens to do are not useful in a pure log-viewing purposes, and not ported: * --bisect (obviously). * --header. I am actually in favor of doing the NUL terminated record format, but rev-list based one always passed --pretty, which defeated this option. Maybe next round. * --parents. I do not think of a reason a log viewer wants this. The flag is primarily for feeding squashed history via pipe to downstream tools. Signed-off-by: Junio C Hamano <junkio@cox.net>
366 lines
8.2 KiB
C
366 lines
8.2 KiB
C
#include "cache.h"
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#include "refs.h"
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#include "tag.h"
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#include "commit.h"
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#include "tree.h"
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#include "blob.h"
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#include "diff.h"
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#include "revision.h"
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/* bits #0-4 in revision.h */
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#define COUNTED (1u<<5)
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static const char rev_list_usage[] =
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"git-rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
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" limiting output:\n"
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" --max-count=nr\n"
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" --max-age=epoch\n"
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" --min-age=epoch\n"
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" --sparse\n"
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" --no-merges\n"
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" --remove-empty\n"
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" --all\n"
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" ordering output:\n"
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" --topo-order\n"
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" --date-order\n"
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" formatting output:\n"
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" --parents\n"
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" --objects | --objects-edge\n"
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" --unpacked\n"
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" --header | --pretty\n"
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" --abbrev=nr | --no-abbrev\n"
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" special purpose:\n"
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" --bisect"
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;
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struct rev_info revs;
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static int bisect_list = 0;
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static int verbose_header = 0;
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static int abbrev = DEFAULT_ABBREV;
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static int show_parents = 0;
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static int hdr_termination = 0;
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static const char *commit_prefix = "";
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static enum cmit_fmt commit_format = CMIT_FMT_RAW;
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static void show_commit(struct commit *commit)
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{
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printf("%s%s", commit_prefix, sha1_to_hex(commit->object.sha1));
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if (show_parents) {
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struct commit_list *parents = commit->parents;
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while (parents) {
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struct object *o = &(parents->item->object);
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parents = parents->next;
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if (o->flags & TMP_MARK)
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continue;
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printf(" %s", sha1_to_hex(o->sha1));
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o->flags |= TMP_MARK;
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}
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/* TMP_MARK is a general purpose flag that can
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* be used locally, but the user should clean
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* things up after it is done with them.
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*/
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for (parents = commit->parents;
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parents;
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parents = parents->next)
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parents->item->object.flags &= ~TMP_MARK;
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}
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if (commit_format == CMIT_FMT_ONELINE)
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putchar(' ');
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else
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putchar('\n');
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if (verbose_header) {
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static char pretty_header[16384];
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pretty_print_commit(commit_format, commit, ~0, pretty_header, sizeof(pretty_header), abbrev);
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printf("%s%c", pretty_header, hdr_termination);
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}
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fflush(stdout);
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}
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static struct object_list **process_blob(struct blob *blob,
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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 *obj = &blob->object;
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if (!revs.blob_objects)
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return p;
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if (obj->flags & (UNINTERESTING | SEEN))
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return p;
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obj->flags |= SEEN;
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return add_object(obj, p, path, name);
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}
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static struct object_list **process_tree(struct tree *tree,
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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 *obj = &tree->object;
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struct tree_entry_list *entry;
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struct name_path me;
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if (!revs.tree_objects)
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return p;
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if (obj->flags & (UNINTERESTING | SEEN))
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return p;
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if (parse_tree(tree) < 0)
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die("bad tree object %s", sha1_to_hex(obj->sha1));
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obj->flags |= SEEN;
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p = add_object(obj, p, path, name);
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me.up = path;
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me.elem = name;
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me.elem_len = strlen(name);
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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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p = process_tree(entry->item.tree, p, &me, entry->name);
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else
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p = process_blob(entry->item.blob, p, &me, entry->name);
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free(entry);
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entry = next;
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}
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return p;
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}
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static void show_commit_list(struct rev_info *revs)
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{
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struct commit *commit;
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struct object_list *objects = NULL, **p = &objects, *pending;
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while ((commit = get_revision(revs)) != NULL) {
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p = process_tree(commit->tree, p, NULL, "");
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show_commit(commit);
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}
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for (pending = revs->pending_objects; pending; pending = pending->next) {
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struct object *obj = pending->item;
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const char *name = pending->name;
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if (obj->flags & (UNINTERESTING | SEEN))
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continue;
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if (obj->type == tag_type) {
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obj->flags |= SEEN;
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p = add_object(obj, p, NULL, name);
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continue;
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}
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if (obj->type == tree_type) {
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p = process_tree((struct tree *)obj, p, NULL, name);
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continue;
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}
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if (obj->type == blob_type) {
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p = process_blob((struct blob *)obj, p, NULL, name);
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continue;
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}
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die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
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}
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while (objects) {
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/* An object with name "foo\n0000000..." can be used to
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* confuse downstream git-pack-objects very badly.
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*/
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const char *ep = strchr(objects->name, '\n');
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if (ep) {
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printf("%s %.*s\n", sha1_to_hex(objects->item->sha1),
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(int) (ep - objects->name),
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objects->name);
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}
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else
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printf("%s %s\n", sha1_to_hex(objects->item->sha1), objects->name);
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objects = objects->next;
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}
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}
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/*
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* This is a truly stupid algorithm, but it's only
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* used for bisection, and we just don't care enough.
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*
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* We care just barely enough to avoid recursing for
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* non-merge entries.
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*/
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static int count_distance(struct commit_list *entry)
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{
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int nr = 0;
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while (entry) {
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struct commit *commit = entry->item;
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struct commit_list *p;
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if (commit->object.flags & (UNINTERESTING | COUNTED))
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break;
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if (!revs.paths || (commit->object.flags & TREECHANGE))
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nr++;
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commit->object.flags |= COUNTED;
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p = commit->parents;
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entry = p;
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if (p) {
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p = p->next;
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while (p) {
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nr += count_distance(p);
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p = p->next;
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}
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}
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}
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return nr;
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}
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static void clear_distance(struct commit_list *list)
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{
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while (list) {
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struct commit *commit = list->item;
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commit->object.flags &= ~COUNTED;
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list = list->next;
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}
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}
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static struct commit_list *find_bisection(struct commit_list *list)
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{
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int nr, closest;
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struct commit_list *p, *best;
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nr = 0;
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p = list;
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while (p) {
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if (!revs.paths || (p->item->object.flags & TREECHANGE))
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nr++;
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p = p->next;
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}
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closest = 0;
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best = list;
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for (p = list; p; p = p->next) {
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int distance;
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if (revs.paths && !(p->item->object.flags & TREECHANGE))
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continue;
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distance = count_distance(p);
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clear_distance(list);
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if (nr - distance < distance)
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distance = nr - distance;
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if (distance > closest) {
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best = p;
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closest = distance;
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}
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}
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if (best)
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best->next = NULL;
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return best;
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}
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static void mark_edge_parents_uninteresting(struct commit *commit)
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{
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struct commit_list *parents;
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for (parents = commit->parents; parents; parents = parents->next) {
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struct commit *parent = parents->item;
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if (!(parent->object.flags & UNINTERESTING))
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continue;
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mark_tree_uninteresting(parent->tree);
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if (revs.edge_hint && !(parent->object.flags & SHOWN)) {
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parent->object.flags |= SHOWN;
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printf("-%s\n", sha1_to_hex(parent->object.sha1));
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}
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}
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}
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static void mark_edges_uninteresting(struct commit_list *list)
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{
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for ( ; list; list = list->next) {
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struct commit *commit = list->item;
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if (commit->object.flags & UNINTERESTING) {
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mark_tree_uninteresting(commit->tree);
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continue;
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}
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mark_edge_parents_uninteresting(commit);
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}
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}
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int main(int argc, const char **argv)
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{
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struct commit_list *list;
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int i;
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argc = setup_revisions(argc, argv, &revs, NULL);
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for (i = 1 ; i < argc; i++) {
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const char *arg = argv[i];
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/* accept -<digit>, like traditilnal "head" */
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if ((*arg == '-') && isdigit(arg[1])) {
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revs.max_count = atoi(arg + 1);
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continue;
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}
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if (!strcmp(arg, "-n")) {
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if (++i >= argc)
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die("-n requires an argument");
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revs.max_count = atoi(argv[i]);
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continue;
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}
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if (!strncmp(arg,"-n",2)) {
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revs.max_count = atoi(arg + 2);
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continue;
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}
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if (!strcmp(arg, "--header")) {
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verbose_header = 1;
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continue;
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}
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if (!strcmp(arg, "--no-abbrev")) {
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abbrev = 0;
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continue;
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}
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if (!strncmp(arg, "--abbrev=", 9)) {
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abbrev = strtoul(arg + 9, NULL, 10);
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if (abbrev && abbrev < MINIMUM_ABBREV)
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abbrev = MINIMUM_ABBREV;
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else if (40 < abbrev)
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abbrev = 40;
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continue;
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}
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if (!strncmp(arg, "--pretty", 8)) {
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commit_format = get_commit_format(arg+8);
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verbose_header = 1;
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hdr_termination = '\n';
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if (commit_format == CMIT_FMT_ONELINE)
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commit_prefix = "";
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else
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commit_prefix = "commit ";
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continue;
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}
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if (!strcmp(arg, "--parents")) {
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show_parents = 1;
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continue;
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}
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if (!strcmp(arg, "--bisect")) {
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bisect_list = 1;
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continue;
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}
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usage(rev_list_usage);
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}
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list = revs.commits;
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if (!list &&
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(!(revs.tag_objects||revs.tree_objects||revs.blob_objects) && !revs.pending_objects))
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usage(rev_list_usage);
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prepare_revision_walk(&revs);
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if (revs.tree_objects)
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mark_edges_uninteresting(revs.commits);
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if (bisect_list)
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revs.commits = find_bisection(revs.commits);
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save_commit_buffer = verbose_header;
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track_object_refs = 0;
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show_commit_list(&revs);
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return 0;
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}
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