From: Junio C Hamano Date: Sat, 14 Feb 2009 07:08:05 +0000 (-0800) Subject: Teach the "@{-1} syntax to "git branch" X-Git-Tag: v1.6.2-rc1~10^2~1 X-Git-Url: https://git.tokkee.org/?a=commitdiff_plain;h=8415d5c7ef63237f6efab0c9aef0b0fdbcbfda25;p=git.git Teach the "@{-1} syntax to "git branch" This teaches the new "@{-1} syntax to refer to the previous branch to "git branch". After looking at somebody's faulty patch series on a topic branch too long, if you decide it is not worth merging, you can just say: $ git checkout master $ git branch -D @{-1} to get rid of it without having to type the name of the topic you now hate so much for wasting a lot of your time. Signed-off-by: Junio C Hamano --- diff --git a/branch.c b/branch.c index b1ac837f3..1f00e44de 100644 --- a/branch.c +++ b/branch.c @@ -103,14 +103,22 @@ void create_branch(const char *head, struct ref_lock *lock; struct commit *commit; unsigned char sha1[20]; - char *real_ref, ref[PATH_MAX], msg[PATH_MAX + 20]; + char *real_ref, msg[PATH_MAX + 20]; + struct strbuf ref = STRBUF_INIT; int forcing = 0; + int len; - snprintf(ref, sizeof ref, "refs/heads/%s", name); - if (check_ref_format(ref)) + len = strlen(name); + if (interpret_nth_last_branch(name, &ref) != len) { + strbuf_reset(&ref); + strbuf_add(&ref, name, len); + } + strbuf_splice(&ref, 0, 0, "refs/heads/", 11); + + if (check_ref_format(ref.buf)) die("'%s' is not a valid branch name.", name); - if (resolve_ref(ref, sha1, 1, NULL)) { + if (resolve_ref(ref.buf, sha1, 1, NULL)) { if (!force) die("A branch named '%s' already exists.", name); else if (!is_bare_repository() && !strcmp(head, name)) @@ -142,7 +150,7 @@ 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, NULL, 0); + lock = lock_any_ref_for_update(ref.buf, NULL, 0); if (!lock) die("Failed to lock ref for update: %s.", strerror(errno)); @@ -162,6 +170,7 @@ void create_branch(const char *head, if (write_ref_sha1(lock, sha1, msg) < 0) die("Failed to write ref: %s.", strerror(errno)); + strbuf_release(&ref); free(real_ref); } diff --git a/builtin-branch.c b/builtin-branch.c index 56a1971d6..504a981ad 100644 --- a/builtin-branch.c +++ b/builtin-branch.c @@ -99,6 +99,7 @@ static int delete_branches(int argc, const char **argv, int force, int kinds) const char *fmt, *remote; int i; int ret = 0; + struct strbuf bname = STRBUF_INIT; switch (kinds) { case REF_REMOTE_BRANCH: @@ -119,20 +120,25 @@ static int delete_branches(int argc, const char **argv, int force, int kinds) if (!head_rev) die("Couldn't look up commit object for HEAD"); } - for (i = 0; i < argc; i++) { - if (kinds == REF_LOCAL_BRANCH && !strcmp(head, argv[i])) { + for (i = 0; i < argc; i++, strbuf_release(&bname)) { + int len = strlen(argv[i]); + + if (interpret_nth_last_branch(argv[i], &bname) != len) + strbuf_add(&bname, argv[i], len); + + if (kinds == REF_LOCAL_BRANCH && !strcmp(head, bname.buf)) { error("Cannot delete the branch '%s' " - "which you are currently on.", argv[i]); + "which you are currently on.", bname.buf); ret = 1; continue; } free(name); - name = xstrdup(mkpath(fmt, argv[i])); + name = xstrdup(mkpath(fmt, bname.buf)); if (!resolve_ref(name, sha1, 1, NULL)) { error("%sbranch '%s' not found.", - remote, argv[i]); + remote, bname.buf); ret = 1; continue; } @@ -152,22 +158,23 @@ static int delete_branches(int argc, const char **argv, int force, int kinds) if (!force && !in_merge_bases(rev, &head_rev, 1)) { error("The branch '%s' is not an ancestor of " - "your current HEAD.\n" - "If you are sure you want to delete it, " - "run 'git branch -D %s'.", argv[i], argv[i]); + "your current HEAD.\n" + "If you are sure you want to delete it, " + "run 'git branch -D %s'.", bname.buf, bname.buf); ret = 1; continue; } if (delete_ref(name, sha1, 0)) { error("Error deleting %sbranch '%s'", remote, - argv[i]); + bname.buf); ret = 1; } else { struct strbuf buf = STRBUF_INIT; - printf("Deleted %sbranch %s (%s).\n", remote, argv[i], - find_unique_abbrev(sha1, DEFAULT_ABBREV)); - strbuf_addf(&buf, "branch.%s", argv[i]); + printf("Deleted %sbranch %s (%s).\n", remote, + bname.buf, + find_unique_abbrev(sha1, DEFAULT_ABBREV)); + strbuf_addf(&buf, "branch.%s", bname.buf); if (git_config_rename_section(buf.buf, NULL) < 0) warning("Update of config-file failed"); strbuf_release(&buf); diff --git a/t/t0100-previous.sh b/t/t0100-previous.sh new file mode 100755 index 000000000..db51b421d --- /dev/null +++ b/t/t0100-previous.sh @@ -0,0 +1,26 @@ +#!/bin/sh + +test_description='previous branch syntax @{-n}' + +. ./test-lib.sh + +test_expect_success 'branch -d @{-1}' ' + test_commit A && + git checkout -b junk && + git checkout - && + test "$(git symbolic-ref HEAD)" = refs/heads/master && + git branch -d @{-1} && + test_must_fail git rev-parse --verify refs/heads/junk +' + +test_expect_success 'branch -d @{-12} when there is not enough switches yet' ' + git reflog expire --expire=now && + git checkout -b junk2 && + git checkout - && + test "$(git symbolic-ref HEAD)" = refs/heads/master && + test_must_fail git branch -d @{-12} && + git rev-parse --verify refs/heads/master +' + +test_done +