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worktree: add --guess-remote flag to add subcommand

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Currently 'git worktree add <path>' creates a new branch named after the
basename of the <path>, that matches the HEAD of whichever worktree we
were on when calling "git worktree add <path>".

It's sometimes useful to have 'git worktree add <path> behave more like
the dwim machinery in 'git checkout <new-branch>', i.e. check if the new
branch name, derived from the basename of the <path>, uniquely matches
the branch name of a remote-tracking branch, and if so check out that
branch and set the upstream to the remote-tracking branch.

Add a new --guess-remote option that enables exactly that behaviour.

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Thomas Gummerer 2017-11-29 20:04:50 +00:00 committed by Junio C Hamano
parent 4e85333197
commit 71d6682d8c
3 changed files with 46 additions and 0 deletions
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7
Documentation/git-worktree.txt
View file

@ -115,6 +115,13 @@ OPTIONS
such as configuring sparse-checkout. See "Sparse checkout"
in linkgit:git-read-tree[1].
--[no-]guess-remote::
With `worktree add <path>`, without `<commit-ish>`, instead
of creating a new branch from HEAD, if there exists a tracking
branch in exactly one remote matching the basename of `<path>,
base the new branch on the remote-tracking branch, and mark
the remote-tracking branch as "upstream" from the new branch.
--[no-]track::
When creating a new branch, if `<commit-ish>` is a branch,
mark it as "upstream" from the new branch. This is the

10
builtin/worktree.c
View file

@ -343,6 +343,7 @@ static int add(int ac, const char **av, const char *prefix)
char *path;
const char *branch;
const char *opt_track = NULL;
int guess_remote = 0;
struct option options[] = {
OPT__FORCE(&opts.force, N_("checkout <branch> even if already checked out in other worktree")),
OPT_STRING('b', NULL, &opts.new_branch, N_("branch"),
@ -355,6 +356,8 @@ static int add(int ac, const char **av, const char *prefix)
OPT_PASSTHRU(0, "track", &opt_track, NULL,
N_("set up tracking mode (see git-branch(1))"),
PARSE_OPT_NOARG | PARSE_OPT_OPTARG),
OPT_BOOL(0, "guess-remote", &guess_remote,
N_("try to match the new branch name with a remote-tracking branch")),
OPT_END()
};
@ -389,6 +392,13 @@ static int add(int ac, const char **av, const char *prefix)
int n;
const char *s = worktree_basename(path, &n);
opts.new_branch = xstrndup(s, n);
if (guess_remote) {
struct object_id oid;
const char *remote =
unique_tracking_name(opts.new_branch, &oid);
if (remote)
branch = remote;
}
}
if (ac == 2 && !opts.new_branch && !opts.detach) {

29
t/t2025-worktree-add.sh
View file

@ -384,4 +384,33 @@ test_expect_success '"add" <path> <branch> dwims' '
)
'
test_expect_success 'git worktree add does not match remote' '
test_when_finished rm -rf repo_a repo_b foo &&
setup_remote_repo repo_a repo_b &&
(
cd repo_b &&
git worktree add ../foo
) &&
(
cd foo &&
test_must_fail git config "branch.foo.remote" &&
test_must_fail git config "branch.foo.merge" &&
! test_cmp_rev refs/remotes/repo_a/foo refs/heads/foo
)
'
test_expect_success 'git worktree add --guess-remote sets up tracking' '
test_when_finished rm -rf repo_a repo_b foo &&
setup_remote_repo repo_a repo_b &&
(
cd repo_b &&
git worktree add --guess-remote ../foo
) &&
(
cd foo &&
test_branch_upstream foo repo_a foo &&
test_cmp_rev refs/remotes/repo_a/foo refs/heads/foo
)
'
test_done