From: Eric Sunshine <sunshine@sunshineco.com>
To: Kazuki Yamaguchi <k@rhe.jp>
Cc: Git List <git@vger.kernel.org>, Duy Nguyen <pclouds@gmail.com>,
Junio C Hamano <gitster@pobox.com>,
Michael Haggerty <mhagger@alum.mit.edu>
Subject: Re: [PATCH v3 1/2] refs: add a new function set_worktree_head_symref
Date: Thu, 7 Apr 2016 17:20:10 -0400 [thread overview]
Message-ID: <CAPig+cQym57U-izza5_Hn0xCDcG0MHFMcWJFc==ohKnr7acFWQ@mail.gmail.com> (raw)
In-Reply-To: <39bc3c1da6daf31f2a10e592dbb5d3daadc96199.1459087958.git.k@rhe.jp>
On Sun, Mar 27, 2016 at 10:37 AM, Kazuki Yamaguchi <k@rhe.jp> wrote:
> Add a new function set_worktree_head_symref, to update HEAD symref for
> the specified worktree.
>
> To update HEAD of a linked working tree,
> create_symref("worktrees/$work_tree/HEAD", "refs/heads/$branch", msg)
> could be used. However when it comes to updating HEAD of the main
> working tree, it is unusable because it uses $GIT_DIR for
> worktree-specific symrefs (HEAD).
>
> The new function takes git_dir (real directory) as an argument, and
> updates HEAD of the working tree. This function will be used when
> renaming a branch.
>
> Signed-off-by: Kazuki Yamaguchi <k@rhe.jp>
> ---
> diff --git a/refs/files-backend.c b/refs/files-backend.c
> @@ -2894,6 +2894,41 @@ int create_symref(const char *refname, const char *target, const char *logmsg)
> +int set_worktree_head_symref(const char *gitdir, const char *target)
> +{
> + static struct lock_file head_lock;
> + struct ref_lock *lock;
> + struct strbuf err = STRBUF_INIT;
> + struct strbuf head_path = STRBUF_INIT;
> + const char *head_rel;
> + int ret;
> +
> + strbuf_addf(&head_path, "%s/HEAD", absolute_path(gitdir));
> + if (hold_lock_file_for_update(&head_lock, head_path.buf,
> + LOCK_NO_DEREF) < 0) {
> + error("%s", err.buf);
'err' has not been populated at this point, so I suspect that this
error message is likely to be rather uninformative.
> + strbuf_release(&err);
> + strbuf_release(&head_path);
> + return -1;
> + }
> +
> + /* head_rel will be "HEAD" for the main tree, "worktrees/wt/HEAD" for
> + linked trees */
> + head_rel = remove_leading_path(head_path.buf,
> + absolute_path(get_git_common_dir()));
> + /* to make use of create_symref_locked(), initialize ref_lock */
> + lock = xcalloc(1, sizeof(struct ref_lock));
> + lock->lk = &head_lock;
> + lock->ref_name = xstrdup(head_rel);
> + lock->orig_ref_name = xstrdup(head_rel);
> +
> + ret = create_symref_locked(lock, head_rel, target, NULL);
> +
> + unlock_ref(lock); /* will free lock */
> + strbuf_release(&head_path);
> + return ret;
> +}
> +
next prev parent reply other threads:[~2016-04-07 21:20 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-21 9:50 [PATCH] branch: update all per-worktree HEADs when renaming a branch Kazuki Yamaguchi
2016-03-21 17:41 ` Eric Sunshine
2016-03-22 0:49 ` Duy Nguyen
2016-03-25 11:56 ` Kazuki Yamaguchi
2016-03-25 11:33 ` Kazuki Yamaguchi
2016-03-25 18:28 ` [PATCH v2 0/5] branch: fix branch operations with multiple working trees Kazuki Yamaguchi
2016-03-25 21:13 ` Junio C Hamano
2016-03-27 7:29 ` Kazuki Yamaguchi
2016-03-25 18:28 ` [PATCH v2 1/5] refs: add new flag RESOLVE_REF_COMMON_DIR to resolve_ref_unsafe Kazuki Yamaguchi
2016-03-25 18:28 ` [PATCH v2 2/5] refs: add REF_COMMON_DIR flag Kazuki Yamaguchi
2016-03-25 18:28 ` [PATCH v2 3/5] refs: add create_symref_common_dir as a variation of create_symref Kazuki Yamaguchi
2016-03-25 18:28 ` [PATCH v2 4/5] branch -m: update all per-worktree HEADs Kazuki Yamaguchi
2016-03-25 18:28 ` [PATCH v2 5/5] branch -d: refuse deleting a branch which is currently checked out Kazuki Yamaguchi
2016-03-25 21:00 ` Junio C Hamano
2016-03-27 17:52 ` Eric Sunshine
2016-03-28 7:16 ` Kazuki Yamaguchi
2016-03-28 7:22 ` [PATCH v2] " Kazuki Yamaguchi
2016-03-28 16:51 ` Eric Sunshine
2016-03-29 9:28 ` Kazuki Yamaguchi
2016-03-29 18:47 ` Eric Sunshine
2016-03-29 9:38 ` [PATCH v3] " Kazuki Yamaguchi
2016-03-29 18:57 ` Eric Sunshine
2016-03-27 14:37 ` [PATCH v3 0/2] update all per-worktree HEADs when renaming a branch Kazuki Yamaguchi
2016-03-27 14:37 ` [PATCH v3 1/2] refs: add a new function set_worktree_head_symref Kazuki Yamaguchi
2016-03-28 17:48 ` Junio C Hamano
2016-03-29 2:23 ` David Turner
2016-04-07 21:20 ` Eric Sunshine [this message]
2016-04-08 6:37 ` Kazuki Yamaguchi
2016-04-08 6:42 ` Eric Sunshine
2016-03-27 14:37 ` [PATCH v3 2/2] branch -m: update all per-worktree HEADs Kazuki Yamaguchi
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