}
static int merge_working_tree(struct checkout_opts *opts,
- struct branch_info *old, struct branch_info *new,
- const char *prefix)
+ struct branch_info *old, struct branch_info *new)
{
int ret;
struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
topts.dir = xcalloc(1, sizeof(*topts.dir));
topts.dir->show_ignored = 1;
topts.dir->exclude_per_dir = ".gitignore";
- topts.prefix = prefix;
tree = parse_tree_indirect(old->commit->object.sha1);
init_tree_desc(&trees[0], tree->buffer, tree->size);
tree = parse_tree_indirect(new->commit->object.sha1);
return 0;
}
-static void adjust_to_tracking(struct branch_info *new, struct checkout_opts *opts)
+static void report_tracking(struct branch_info *new, struct checkout_opts *opts)
{
/*
* We have switched to a new branch; is it building on
char *base;
unsigned char sha1[20];
struct commit *ours, *theirs;
- const char *msgfmt;
char symmetric[84];
- int show_log;
- struct branch *branch = branch_get(NULL);
+ struct rev_info revs;
+ const char *rev_argv[10];
+ int rev_argc;
+ int num_ours, num_theirs;
+ const char *remote_msg;
+ struct branch *branch = branch_get(new->name);
- if (!branch || !branch->merge)
+ /*
+ * 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;
- base = branch->merge[0]->dst;
-
- ours = new->commit;
-
- sprintf(symmetric, "%s", sha1_to_hex(ours->object.sha1));
-
/*
- * Ok, it is tracking base; is it ahead of us?
+ * 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;
- theirs = lookup_commit(sha1);
-
- sprintf(symmetric + 40, "...%s", sha1_to_hex(sha1));
+ theirs = lookup_commit(sha1);
+ ours = new->commit;
if (!hashcmp(sha1, ours->object.sha1))
return; /* we are the same */
- show_log = 1;
- if (in_merge_bases(theirs, &ours, 1)) {
- msgfmt = "You are ahead of the tracked branch '%s'\n";
- show_log = 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++;
}
- else if (in_merge_bases(ours, &theirs, 1))
- msgfmt = "Your branch can be fast-forwarded to the tracked branch '%s'\n";
- else
- msgfmt = "Both your branch and the tracked branch '%s' have own changes, you would eventually need to merge\n";
- if (!prefixcmp(base, "refs/remotes/"))
+ if (!prefixcmp(base, "refs/remotes/")) {
+ remote_msg = " remote";
base += strlen("refs/remotes/");
- fprintf(stderr, msgfmt, base);
-
- if (show_log) {
- const char *args[32];
- int ac;
-
- ac = 0;
- args[ac++] = "log";
- args[ac++] = "--pretty=oneline";
- args[ac++] = "--abbrev-commit";
- args[ac++] = "--left-right";
- args[ac++] = "--boundary";
- args[ac++] = symmetric;
- args[ac++] = "--";
- args[ac] = NULL;
-
- run_command_v_opt(args, RUN_GIT_CMD);
+ } else {
+ remote_msg = "";
}
-}
+ if (!num_theirs)
+ printf("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)
+ printf("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
+ printf("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);
+}
static void update_refs_for_switch(struct checkout_opts *opts,
struct branch_info *old,
}
remove_branch_state();
strbuf_release(&msg);
- if (new->path || !strcmp(new->name, "HEAD"))
- adjust_to_tracking(new, opts);
+ if (!opts->quiet && (new->path || !strcmp(new->name, "HEAD")))
+ report_tracking(new, opts);
}
-static int switch_branches(struct checkout_opts *opts,
- struct branch_info *new, const char *prefix)
+static int switch_branches(struct checkout_opts *opts, struct branch_info *new)
{
int ret = 0;
struct branch_info old;
opts->force = 1;
}
- ret = merge_working_tree(opts, &old, new, prefix);
+ ret = merge_working_tree(opts, &old, new);
if (ret)
return ret;
die("Cannot switch branch to a non-commit.");
}
- return switch_branches(&opts, &new, prefix);
+ return switch_branches(&opts, &new);
}