diff --git a/Documentation/git-branch.txt b/Documentation/git-branch.txt index 44144d5a0d..6b6c3da2d9 100644 --- a/Documentation/git-branch.txt +++ b/Documentation/git-branch.txt @@ -11,7 +11,7 @@ SYNOPSIS 'git branch' [--color | --no-color] [-r | -a] [-v [--abbrev= | --no-abbrev]] [(--merged | --no-merged | --contains) []] -'git branch' [--track | --no-track] [-l] [-f] [] +'git branch' [--set-upstream | --track | --no-track] [-l] [-f] [] 'git branch' (-m | -M) [] 'git branch' (-d | -D) [-r] ... @@ -129,6 +129,12 @@ start-point is either a local or remote branch. Do not set up "upstream" configuration, even if the branch.autosetupmerge configuration variable is true. +--set-upstream:: + If specified branch does not exist yet or if '--force' has been + given, acts exactly like '--track'. Otherwise sets up configuration + like '--track' would when creating the branch, except that where + branch points to is not changed. + --contains :: Only list branches which contain the specified commit. diff --git a/branch.c b/branch.c index 05ef3f5c9c..9e1f63ed8d 100644 --- a/branch.c +++ b/branch.c @@ -49,9 +49,19 @@ static int should_setup_rebase(const char *origin) void install_branch_config(int flag, const char *local, const char *origin, const char *remote) { + const char *shortname = remote + 11; + int remote_is_branch = !prefixcmp(remote, "refs/heads/"); struct strbuf key = STRBUF_INIT; int rebasing = should_setup_rebase(origin); + if (remote_is_branch + && !strcmp(local, shortname) + && !origin) { + warning("Not setting branch %s as its own upstream.", + local); + return; + } + strbuf_addf(&key, "branch.%s.remote", local); git_config_set(key.buf, origin ? origin : "."); @@ -71,8 +81,8 @@ void install_branch_config(int flag, const char *local, const char *origin, cons strbuf_addstr(&key, origin ? "remote" : "local"); /* Are we tracking a proper "branch"? */ - if (!prefixcmp(remote, "refs/heads/")) { - strbuf_addf(&key, " branch %s", remote + 11); + if (remote_is_branch) { + strbuf_addf(&key, " branch %s", shortname); if (origin) strbuf_addf(&key, " from %s", origin); } @@ -108,6 +118,7 @@ static int setup_tracking(const char *new_ref, const char *orig_ref, switch (track) { case BRANCH_TRACK_ALWAYS: case BRANCH_TRACK_EXPLICIT: + case BRANCH_TRACK_OVERRIDE: break; default: return 1; @@ -128,18 +139,25 @@ void create_branch(const char *head, const char *name, const char *start_name, int force, int reflog, enum branch_track track) { - struct ref_lock *lock; + struct ref_lock *lock = NULL; struct commit *commit; unsigned char sha1[20]; char *real_ref, msg[PATH_MAX + 20]; struct strbuf ref = STRBUF_INIT; int forcing = 0; + int dont_change_ref = 0; + int explicit_tracking = 0; + + if (track == BRANCH_TRACK_EXPLICIT || track == BRANCH_TRACK_OVERRIDE) + explicit_tracking = 1; if (strbuf_check_branch_ref(&ref, name)) die("'%s' is not a valid branch name.", name); if (resolve_ref(ref.buf, sha1, 1, NULL)) { - if (!force) + if (!force && track == BRANCH_TRACK_OVERRIDE) + dont_change_ref = 1; + else if (!force) die("A branch named '%s' already exists.", name); else if (!is_bare_repository() && !strcmp(head, name)) die("Cannot force update the current branch."); @@ -153,12 +171,12 @@ void create_branch(const char *head, switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) { case 0: /* Not branching from any existing branch */ - if (track == BRANCH_TRACK_EXPLICIT) + if (explicit_tracking) die("Cannot setup tracking information; starting point is not a branch."); break; case 1: /* Unique completion -- good, only if it is a real ref */ - if (track == BRANCH_TRACK_EXPLICIT && !strcmp(real_ref, "HEAD")) + if (explicit_tracking && !strcmp(real_ref, "HEAD")) die("Cannot setup tracking information; starting point is not a branch."); break; default: @@ -170,9 +188,11 @@ void create_branch(const char *head, die("Not a valid branch point: '%s'.", start_name); hashcpy(sha1, commit->object.sha1); - lock = lock_any_ref_for_update(ref.buf, NULL, 0); - if (!lock) - die_errno("Failed to lock ref for update"); + if (!dont_change_ref) { + lock = lock_any_ref_for_update(ref.buf, NULL, 0); + if (!lock) + die_errno("Failed to lock ref for update"); + } if (reflog) log_all_ref_updates = 1; @@ -180,15 +200,16 @@ void create_branch(const char *head, if (forcing) snprintf(msg, sizeof msg, "branch: Reset from %s", start_name); - else + else if (!dont_change_ref) snprintf(msg, sizeof msg, "branch: Created from %s", start_name); if (real_ref && track) setup_tracking(name, real_ref, track); - if (write_ref_sha1(lock, sha1, msg) < 0) - die_errno("Failed to write ref"); + if (!dont_change_ref) + if (write_ref_sha1(lock, sha1, msg) < 0) + die_errno("Failed to write ref"); strbuf_release(&ref); free(real_ref); diff --git a/builtin-branch.c b/builtin-branch.c index ddc9f2dab7..970cf31811 100644 --- a/builtin-branch.c +++ b/builtin-branch.c @@ -564,6 +564,8 @@ int cmd_branch(int argc, const char **argv, const char *prefix) OPT__VERBOSE(&verbose), OPT_SET_INT('t', "track", &track, "set up tracking mode (see git-pull(1))", BRANCH_TRACK_EXPLICIT), + OPT_SET_INT( 0, "set-upstream", &track, "change upstream info", + BRANCH_TRACK_OVERRIDE), OPT_BOOLEAN( 0 , "color", &branch_use_color, "use colored output"), OPT_SET_INT('r', NULL, &kinds, "act on remote-tracking branches", REF_REMOTE_BRANCH), diff --git a/cache.h b/cache.h index 4b15042c08..7d5c21e3f1 100644 --- a/cache.h +++ b/cache.h @@ -553,6 +553,7 @@ enum branch_track { BRANCH_TRACK_REMOTE, BRANCH_TRACK_ALWAYS, BRANCH_TRACK_EXPLICIT, + BRANCH_TRACK_OVERRIDE, }; enum rebase_setup_type { diff --git a/t/t6040-tracking-info.sh b/t/t6040-tracking-info.sh index 664b0f8052..1785e178a4 100755 --- a/t/t6040-tracking-info.sh +++ b/t/t6040-tracking-info.sh @@ -89,4 +89,25 @@ test_expect_success 'status when tracking annotated tags' ' grep "set up to track" actual && git checkout heavytrack ' + +test_expect_success 'setup tracking with branch --set-upstream on existing branch' ' + git branch from-master master && + test_must_fail git config branch.from-master.merge > actual && + git branch --set-upstream from-master master && + git config branch.from-master.merge > actual && + grep -q "^refs/heads/master$" actual +' + +test_expect_success '--set-upstream does not change branch' ' + git branch from-master2 master && + test_must_fail git config branch.from-master2.merge > actual && + git rev-list from-master2 && + git update-ref refs/heads/from-master2 from-master2^ && + git rev-parse from-master2 >expect2 && + git branch --set-upstream from-master2 master && + git config branch.from-master.merge > actual && + git rev-parse from-master2 >actual2 && + grep -q "^refs/heads/master$" actual && + cmp expect2 actual2 +' test_done