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clone: allow --branch to take a tag

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Because a tag ref cannot be put to HEAD, HEAD will become detached.
This is consistent with "git checkout <tag>".

This is mostly useful in shallow clone, where it allows you to clone a
tag in addtion to branches.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy
2012-01-16 16:46:15 +07:00
committed by Junio C Hamano
parent 920b691fe4
commit 5a7d5b683f
4 changed files with 46 additions and 3 deletions
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20
builtin/clone.c
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@ -420,6 +420,15 @@ static struct ref *find_remote_branch(const struct ref *refs, const char *branch
strbuf_addstr(&head, branch);
ref = find_ref_by_name(refs, head.buf);
strbuf_release(&head);
if (ref)
return ref;
strbuf_addstr(&head, "refs/tags/");
strbuf_addstr(&head, branch);
ref = find_ref_by_name(refs, head.buf);
strbuf_release(&head);
return ref;
}
@ -441,8 +450,12 @@ static struct ref *wanted_peer_refs(const struct ref *refs,
if (!remote_head && option_branch)
warning(_("Could not find remote branch %s to clone."),
option_branch);
else
else {
get_fetch_map(remote_head, refspec, &tail, 0);
/* if --branch=tag, pull the requested tag explicitly */
get_fetch_map(remote_head, tag_refspec, &tail, 0);
}
} else
get_fetch_map(refs, refspec, &tail, 0);
@ -515,6 +528,11 @@ static void update_head(const struct ref *our, const struct ref *remote,
update_ref(msg, "HEAD", our->old_sha1, NULL, 0, DIE_ON_ERR);
install_branch_config(0, head, option_origin, our->name);
}
} else if (our) {
struct commit *c = lookup_commit_reference(our->old_sha1);
/* --branch specifies a non-branch (i.e. tags), detach HEAD */
update_ref(msg, "HEAD", c->object.sha1,
NULL, REF_NODEREF, DIE_ON_ERR);
} else if (remote) {
/*
* We know remote HEAD points to a non-branch, or