diff options
Diffstat (limited to 'remote.c')
| -rw-r--r-- | remote.c | 117 |
1 files changed, 117 insertions, 0 deletions
@@ -1,6 +1,9 @@ #include "cache.h" #include "remote.h" #include "refs.h" +#include "commit.h" +#include "diff.h" +#include "revision.h" static struct refspec s_tag_refspec = { 0, @@ -1222,3 +1225,117 @@ int resolve_remote_symref(struct ref *ref, struct ref *list) } return 1; } + +/* + * Return true if there is anything to report, otherwise false. + */ +int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs) +{ + unsigned char sha1[20]; + struct commit *ours, *theirs; + char symmetric[84]; + struct rev_info revs; + const char *rev_argv[10], *base; + int rev_argc; + + /* + * Nothing to report unless we are marked to build on top of + * somebody else. + */ + if (!branch || + !branch->merge || !branch->merge[0] || !branch->merge[0]->dst) + return 0; + + /* + * If what we used to build on no longer exists, there is + * nothing to report. + */ + base = branch->merge[0]->dst; + if (!resolve_ref(base, sha1, 1, NULL)) + return 0; + theirs = lookup_commit(sha1); + if (!theirs) + return 0; + + if (!resolve_ref(branch->refname, sha1, 1, NULL)) + return 0; + ours = lookup_commit(sha1); + if (!ours) + return 0; + + /* are we the same? */ + if (theirs == ours) + return 0; + + /* Run "rev-list --left-right ours...theirs" internally... */ + rev_argc = 0; + rev_argv[rev_argc++] = NULL; + rev_argv[rev_argc++] = "--left-right"; + rev_argv[rev_argc++] = symmetric; + rev_argv[rev_argc++] = "--"; + rev_argv[rev_argc] = NULL; + + strcpy(symmetric, sha1_to_hex(ours->object.sha1)); + strcpy(symmetric + 40, "..."); + strcpy(symmetric + 43, sha1_to_hex(theirs->object.sha1)); + + init_revisions(&revs, NULL); + setup_revisions(rev_argc, rev_argv, &revs, NULL); + prepare_revision_walk(&revs); + + /* ... and count the commits on each side. */ + *num_ours = 0; + *num_theirs = 0; + while (1) { + struct commit *c = get_revision(&revs); + if (!c) + break; + if (c->object.flags & SYMMETRIC_LEFT) + (*num_ours)++; + else + (*num_theirs)++; + } + + /* clear object flags smudged by the above traversal */ + clear_commit_marks(ours, ALL_REV_FLAGS); + clear_commit_marks(theirs, ALL_REV_FLAGS); + return 1; +} + +/* + * Return true when there is anything to report, otherwise false. + */ +int format_tracking_info(struct branch *branch, struct strbuf *sb) +{ + int num_ours, num_theirs; + const char *base, *remote_msg; + + if (!stat_tracking_info(branch, &num_ours, &num_theirs)) + return 0; + + base = branch->merge[0]->dst; + if (!prefixcmp(base, "refs/remotes/")) { + remote_msg = " remote"; + base += strlen("refs/remotes/"); + } else { + remote_msg = ""; + } + if (!num_theirs) + strbuf_addf(sb, "Your branch is ahead of the tracked%s branch '%s' " + "by %d commit%s.\n", + remote_msg, base, + num_ours, (num_ours == 1) ? "" : "s"); + else if (!num_ours) + strbuf_addf(sb, "Your branch is behind the tracked%s branch '%s' " + "by %d commit%s,\n" + "and can be fast-forwarded.\n", + remote_msg, base, + num_theirs, (num_theirs == 1) ? "" : "s"); + else + strbuf_addf(sb, "Your branch and the tracked%s branch '%s' " + "have diverged,\nand respectively " + "have %d and %d different commit(s) each.\n", + remote_msg, base, + num_ours, num_theirs); + return 1; +} |