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https://github.com/git/git
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![Junio C Hamano](/assets/img/avatar_default.png)
This makes reviewing git log --left-right --merge --no-merges -p a lot more pleasant. Signed-off-by: Junio C Hamano <junkio@cox.net>
294 lines
6.4 KiB
C
294 lines
6.4 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 "tree-walk.h"
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#include "diff.h"
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#include "revision.h"
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#include "list-objects.h"
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#include "builtin.h"
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/* bits #0-15 in revision.h */
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#define COUNTED (1u<<16)
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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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" --stdin\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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" --abbrev-commit\n"
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" special purpose:\n"
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" --bisect"
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;
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static struct rev_info revs;
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static int bisect_list;
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static int show_timestamp;
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static int hdr_termination;
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static const char *header_prefix;
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static void show_commit(struct commit *commit)
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{
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if (show_timestamp)
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printf("%lu ", commit->date);
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if (header_prefix)
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fputs(header_prefix, stdout);
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if (commit->object.flags & BOUNDARY)
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putchar('-');
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else if (revs.left_right) {
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if (commit->object.flags & SYMMETRIC_LEFT)
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putchar('<');
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else
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putchar('>');
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}
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if (revs.abbrev_commit && revs.abbrev)
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fputs(find_unique_abbrev(commit->object.sha1, revs.abbrev),
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stdout);
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else
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fputs(sha1_to_hex(commit->object.sha1), stdout);
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if (revs.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 (revs.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 (revs.verbose_header) {
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static char pretty_header[16384];
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pretty_print_commit(revs.commit_format, commit, ~0,
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pretty_header, sizeof(pretty_header),
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revs.abbrev, NULL, NULL, revs.relative_date);
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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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if (commit->parents) {
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free_commit_list(commit->parents);
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commit->parents = NULL;
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}
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free(commit->buffer);
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commit->buffer = NULL;
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}
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static void show_object(struct object_array_entry *p)
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{
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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(p->name, '\n');
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if (ep) {
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printf("%s %.*s\n", sha1_to_hex(p->item->sha1),
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(int) (ep - p->name),
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p->name);
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}
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else
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printf("%s %s\n", sha1_to_hex(p->item->sha1), p->name);
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}
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static void show_edge(struct commit *commit)
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{
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printf("-%s\n", sha1_to_hex(commit->object.sha1));
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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.prune_fn || (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.prune_fn || (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.prune_fn && !(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 read_revisions_from_stdin(struct rev_info *revs)
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{
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char line[1000];
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while (fgets(line, sizeof(line), stdin) != NULL) {
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int len = strlen(line);
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if (line[len - 1] == '\n')
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line[--len] = 0;
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if (!len)
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break;
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if (line[0] == '-')
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die("options not supported in --stdin mode");
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if (handle_revision_arg(line, revs, 0, 1))
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die("bad revision '%s'", line);
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}
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}
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int cmd_rev_list(int argc, const char **argv, const char *prefix)
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{
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struct commit_list *list;
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int i;
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int read_from_stdin = 0;
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init_revisions(&revs, prefix);
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revs.abbrev = 0;
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revs.commit_format = CMIT_FMT_UNSPECIFIED;
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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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if (!strcmp(arg, "--header")) {
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revs.verbose_header = 1;
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continue;
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}
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if (!strcmp(arg, "--timestamp")) {
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show_timestamp = 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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if (!strcmp(arg, "--stdin")) {
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if (read_from_stdin++)
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die("--stdin given twice?");
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read_revisions_from_stdin(&revs);
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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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if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
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/* The command line has a --pretty */
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hdr_termination = '\n';
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if (revs.commit_format == CMIT_FMT_ONELINE)
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header_prefix = "";
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else
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header_prefix = "commit ";
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}
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else if (revs.verbose_header)
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/* Only --header was specified */
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revs.commit_format = CMIT_FMT_RAW;
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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) &&
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!revs.pending.nr)) ||
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revs.diff)
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usage(rev_list_usage);
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save_commit_buffer = revs.verbose_header || revs.grep_filter;
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track_object_refs = 0;
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if (bisect_list)
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revs.limited = 1;
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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, &revs, show_edge);
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if (bisect_list)
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revs.commits = find_bisection(revs.commits);
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traverse_commit_list(&revs, show_commit, show_object);
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return 0;
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}
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