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worktree: make setup of new HEAD distinct from worktree population

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git-worktree currently conflates setting of HEAD in the new worktree and
initial worktree population into a single git-checkout invocation which
requires git-checkout to have special knowledge that it is operating on
a newly created worktree. The eventual goal is to rid git-checkout of
that overly-intimate knowledge.

Once these operations are separate, git-worktree will no longer be able
to delegate to git-branch the setting of the new worktree's HEAD to the
desired branch (or commit, if detached). Therefore, make git-worktree
itself responsible for setting up HEAD as either a symbolic reference,
if associated with a branch, or detached, if not.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Eric Sunshine 2015-07-17 19:00:14 -04:00 committed by Junio C Hamano
parent f7c9dac1b0
commit 7f44e3d1de
1 changed files with 15 additions and 5 deletions
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20
builtin/worktree.c
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@ -278,12 +278,21 @@ static int add_worktree(const char *path, const char *refname,
argv_array_pushf(&child_env, "%s=%s", GIT_WORK_TREE_ENVIRONMENT, path);
memset(&cp, 0, sizeof(cp));
cp.git_cmd = 1;
if (commit)
argv_array_pushl(&cp.args, "update-ref", "HEAD",
sha1_to_hex(commit->object.sha1), NULL);
else
argv_array_pushl(&cp.args, "symbolic-ref", "HEAD",
symref.buf, NULL);
cp.env = child_env.argv;
ret = run_command(&cp);
if (ret)
goto done;
cp.argv = NULL;
argv_array_clear(&cp.args);
argv_array_push(&cp.args, "checkout");
if (opts->force)
argv_array_push(&cp.args, "--ignore-other-worktrees");
if (opts->detach)
argv_array_push(&cp.args, "--detach");
argv_array_push(&cp.args, refname);
cp.env = child_env.argv;
ret = run_command(&cp);
if (!ret) {
@ -293,6 +302,7 @@ static int add_worktree(const char *path, const char *refname,
junk_work_tree = NULL;
junk_git_dir = NULL;
}
done:
strbuf_reset(&sb);
strbuf_addf(&sb, "%s/locked", sb_repo.buf);
unlink_or_warn(sb.buf);