branch: add --unset-upstream option

We have ways of setting the upstream information, but if we want to
unset it, we need to resort to modifying the configuration manually.

Teach branch an --unset-upstream option that unsets this information.

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-branch.txt b/Documentation/git-branch.txt
index e41c4b55fd421f96a6cbed9573d6848b8f783922..9c1d2f1781c15da786d0b1e9fb2d39562e474f29 100644 (file)
--- a/Documentation/git-branch.txt
+++ b/Documentation/git-branch.txt
@@ -14,6 +14,7 @@ SYNOPSIS
        [(--merged | --no-merged | --contains) [<commit>]] [<pattern>...]
 'git branch' [--set-upstream | --track | --no-track] [-l] [-f] <branchname> [<start-point>]
 'git branch' (--set-upstream-to=<upstream> | -u <upstream>) [<branchname>]
+'git branch' --unset-upstream [<branchname>]
 'git branch' (-m | -M) [<oldbranch>] <newbranch>
 'git branch' (-d | -D) [-r] <branchname>...
 'git branch' --edit-description [<branchname>]
@@ -180,6 +181,10 @@ start-point is either a local or remote-tracking branch.
        considered <branchname>'s upstream branch. If no <branchname>
        is specified, then it defaults to the current branch.
 
+--unset-upstream::
+       Remove the upstream information for <branchname>. If no branch
+       is specified it defaults to the current branch.
+
 --edit-description::
        Open an editor and edit the text to explain what the branch is
        for, to be used by various other commands (e.g. `request-pull`).

diff --git a/builtin/branch.c b/builtin/branch.c
index 3c978eb18e70ef29ea9f8eb7deb7b8551328e8e0..557995d9785cc836fdba50cb9afb09769e6c2759 100644 (file)
--- a/builtin/branch.c
+++ b/builtin/branch.c
@@ -712,7 +712,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
        int delete = 0, rename = 0, force_create = 0, list = 0;
        int verbose = 0, abbrev = -1, detached = 0;
        int reflog = 0, edit_description = 0;
-       int quiet = 0;
+       int quiet = 0, unset_upstream = 0;
        const char *new_upstream = NULL;
        enum branch_track track;
        int kinds = REF_LOCAL_BRANCH;
@@ -728,6 +728,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
                OPT_SET_INT( 0, "set-upstream",  &track, "change upstream info",
                        BRANCH_TRACK_OVERRIDE),
                OPT_STRING('u', "set-upstream-to", &new_upstream, "upstream", "change the upstream info"),
+               OPT_BOOLEAN(0, "unset-upstream", &unset_upstream, "Unset the upstream info"),
                OPT__COLOR(&branch_use_color, "use colored output"),
                OPT_SET_INT('r', "remotes",     &kinds, "act on remote-tracking branches",
                        REF_REMOTE_BRANCH),
@@ -796,10 +797,10 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
        argc = parse_options(argc, argv, prefix, options, builtin_branch_usage,
                             0);
 
-       if (!delete && !rename && !edit_description && !new_upstream && argc == 0)
+       if (!delete && !rename && !edit_description && !new_upstream && !unset_upstream && argc == 0)
                list = 1;
 
-       if (!!delete + !!rename + !!force_create + !!list + !!new_upstream > 1)
+       if (!!delete + !!rename + !!force_create + !!list + !!new_upstream + !!unset_upstream > 1)
                usage_with_options(builtin_branch_usage, options);
 
        if (abbrev == -1)
@@ -865,6 +866,20 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
                 * info and making sure new_upstream is correct
                 */
                create_branch(head, branch->name, new_upstream, 0, 0, 0, quiet, BRANCH_TRACK_OVERRIDE);
+       } else if (unset_upstream) {
+               struct branch *branch = branch_get(argv[0]);
+               struct strbuf buf = STRBUF_INIT;
+
+               if (!branch_has_merge_config(branch)) {
+                       die(_("Branch '%s' has no upstream information"), branch->name);
+               }
+
+               strbuf_addf(&buf, "branch.%s.remote", branch->name);
+               git_config_set_multivar(buf.buf, NULL, NULL, 1);
+               strbuf_reset(&buf);
+               strbuf_addf(&buf, "branch.%s.merge", branch->name);
+               git_config_set_multivar(buf.buf, NULL, NULL, 1);
+               strbuf_release(&buf);
        } else if (argc > 0 && argc <= 2) {
                if (kinds != REF_LOCAL_BRANCH)
                        die(_("-a and -r options to 'git branch' do not make sense with a branch name"));

diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh
index e9019ac9432f88500f26ffb08295daff67de8908..0bf72d2067e74469fa1ffa09e80940cd5a78579a 100755 (executable)
--- a/t/t3200-branch.sh
+++ b/t/t3200-branch.sh
@@ -383,6 +383,28 @@ test_expect_success 'use --set-upstream-to modify a particular branch' \
      test "$(git config branch.my13.remote)" = "." &&
      test "$(git config branch.my13.merge)" = "refs/heads/master"'
 
+test_expect_success '--unset-upstream should fail if given a non-existent branch' \
+    'test_must_fail git branch --unset-upstream i-dont-exist'
+
+test_expect_success 'test --unset-upstream on HEAD' \
+    'git branch my14
+     test_config branch.master.remote foo &&
+     test_config branch.master.merge foo &&
+     git branch --set-upstream-to my14 &&
+     git branch --unset-upstream &&
+     test_must_fail git config branch.master.remote &&
+     test_must_fail git config branch.master.merge &&
+     # fail for a branch without upstream set
+     test_must_fail git branch --unset-upstream
+'
+
+test_expect_success 'test --unset-upstream on a particular branch' \
+    'git branch my15
+     git branch --set-upstream-to master my14 &&
+     git branch --unset-upstream my14 &&
+     test_must_fail git config branch.my14.remote &&
+     test_must_fail git config branch.my14.merge'
+
 # Keep this test last, as it changes the current branch
 cat >expect <<EOF
 $_z40 $HEAD $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> 1117150200 +0000        branch: Created from master