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From: "Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>
To: git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>,
	"Michael Haggerty" <mhagger@alum.mit.edu>,
	"Stefan Beller" <sbeller@google.com>,
	"Johannes Schindelin" <Johannes.Schindelin@gmx.de>,
	"Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>
Subject: [PATCH 14/15] revision.c: --reflog add HEAD reflog from all worktrees
Date: Fri, 17 Feb 2017 21:19:07 +0700	[thread overview]
Message-ID: <20170217141908.18012-15-pclouds@gmail.com> (raw)
In-Reply-To: <20170217141908.18012-1-pclouds@gmail.com>

Note that add_other_reflogs_to_pending() is a bit inefficient, since
it scans reflog for all refs of each worktree, including shared refs,
so the shared ref's reflog is scanned over and over again.

We could update refs API to pass "per-worktree only" flag to avoid
that. But long term we should be able to obtain a "per-worktree only"
ref store and would need to revert the changes in reflog iteration
API. So let's just wait until then.

add_reflogs_to_pending() is called by reachable.c so by default "git
prune" will examine reflog from all worktrees.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 revision.c       | 28 +++++++++++++++++++++++++++-
 t/t5304-prune.sh | 16 ++++++++++++++++
 2 files changed, 43 insertions(+), 1 deletion(-)

diff --git a/revision.c b/revision.c
index 8ee929cef..ecfd6fea6 100644
--- a/revision.c
+++ b/revision.c
@@ -1134,6 +1134,7 @@ struct all_refs_cb {
 	int warned_bad_reflog;
 	struct rev_info *all_revs;
 	const char *name_for_errormsg;
+	struct ref_store *refs;
 };
 
 int ref_excluded(struct string_list *ref_excludes, const char *path)
@@ -1169,6 +1170,7 @@ static void init_all_refs_cb(struct all_refs_cb *cb, struct rev_info *revs,
 {
 	cb->all_revs = revs;
 	cb->all_flags = flags;
+	cb->refs = NULL;
 }
 
 void clear_ref_exclusion(struct string_list **ref_excludes_p)
@@ -1237,17 +1239,41 @@ static int handle_one_reflog(const char *path, const struct object_id *oid,
 	struct all_refs_cb *cb = cb_data;
 	cb->warned_bad_reflog = 0;
 	cb->name_for_errormsg = path;
-	for_each_reflog_ent(path, handle_one_reflog_ent, cb_data);
+	refs_for_each_reflog_ent(cb->refs, path,
+				 handle_one_reflog_ent, cb_data);
 	return 0;
 }
 
+static void add_other_reflogs_to_pending(struct all_refs_cb *cb)
+{
+	struct worktree **worktrees, **p;
+
+	worktrees = get_worktrees(0);
+	for (p = worktrees; *p; p++) {
+		struct worktree *wt = *p;
+
+		if (wt->is_current)
+			continue;
+
+		cb->refs = get_worktree_ref_store(wt);
+		refs_for_each_reflog(cb->refs,
+				     handle_one_reflog,
+				     cb);
+	}
+	free_worktrees(worktrees);
+}
+
 void add_reflogs_to_pending(struct rev_info *revs, unsigned flags)
 {
 	struct all_refs_cb cb;
 
 	cb.all_revs = revs;
 	cb.all_flags = flags;
+	cb.refs = get_main_ref_store();
 	for_each_reflog(handle_one_reflog, &cb);
+
+	if (!revs->single_worktree)
+		add_other_reflogs_to_pending(&cb);
 }
 
 static void add_cache_tree(struct cache_tree *it, struct rev_info *revs,
diff --git a/t/t5304-prune.sh b/t/t5304-prune.sh
index 683bdb031..6694c19a1 100755
--- a/t/t5304-prune.sh
+++ b/t/t5304-prune.sh
@@ -304,4 +304,20 @@ test_expect_success 'prune: handle HEAD in multiple worktrees' '
 	test_cmp third-worktree/blob actual
 '
 
+test_expect_success 'prune: handle HEAD reflog in multiple worktrees' '
+	git config core.logAllRefUpdates true &&
+	echo "lost blob for third-worktree" >expected &&
+	(
+		cd third-worktree &&
+		cat ../expected >blob &&
+		git add blob &&
+		git commit -m "second commit in third" &&
+		git reset --hard HEAD^
+	) &&
+	git prune --expire=now &&
+	SHA1=`git hash-object expected` &&
+	git -C third-worktree show "$SHA1" >actual &&
+	test_cmp expected actual
+'
+
 test_done
-- 
2.11.0.157.gd943d85


  parent reply	other threads:[~2017-02-17 14:20 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-17 14:18 [PATCH/RFC 00/15] Fix git-gc losing objects in multi worktree Nguyễn Thái Ngọc Duy
2017-02-17 14:18 ` [PATCH 01/15] revision.h: new flag in struct rev_info wrt. worktree-related refs Nguyễn Thái Ngọc Duy
2017-02-17 14:18 ` [PATCH 02/15] revision.c: refactor add_index_objects_to_pending() Nguyễn Thái Ngọc Duy
2017-02-17 14:18 ` [PATCH 03/15] revision.c: --indexed-objects add objects from all worktrees Nguyễn Thái Ngọc Duy
2017-02-17 14:18 ` [PATCH 04/15] refs: move submodule slash stripping code to get_submodule_ref_store Nguyễn Thái Ngọc Duy
2017-02-17 14:18 ` [PATCH 05/15] refs: add refs_read_ref[_full]() Nguyễn Thái Ngọc Duy
2017-02-17 14:18 ` [PATCH 06/15] refs: add refs_head_ref() Nguyễn Thái Ngọc Duy
2017-02-17 14:19 ` [PATCH 07/15] refs: add refs_for_each_ref() Nguyễn Thái Ngọc Duy
2017-02-17 14:19 ` [PATCH 08/15] refs: add a refs_for_each_in() and friends Nguyễn Thái Ngọc Duy
2017-02-17 14:19 ` [PATCH 09/15] revision.c: use refs_for_each*() instead of for_each_*_submodule() Nguyễn Thái Ngọc Duy
2017-02-17 14:19 ` [PATCH 10/15] refs: remove dead for_each_*_submodule() Nguyễn Thái Ngọc Duy
2017-02-17 14:19 ` [PATCH 11/15] revision.c: --all adds HEAD from all worktrees Nguyễn Thái Ngọc Duy
2017-02-17 14:19 ` [PATCH 12/15] refs: add refs_for_each_reflog[_ent]() Nguyễn Thái Ngọc Duy
2017-02-17 14:19 ` [PATCH 13/15] files-backend: make reflog iterator go through per-worktree reflog Nguyễn Thái Ngọc Duy
2017-02-17 14:19 ` Nguyễn Thái Ngọc Duy [this message]
2017-02-17 14:19 ` [PATCH 15/15] rev-list: expose and document --single-worktree Nguyễn Thái Ngọc Duy
2017-02-17 17:09 ` [PATCH/RFC 00/15] Fix git-gc losing objects in multi worktree Johannes Schindelin
2017-03-18 10:11 ` [PATCH v2 00/12] " Nguyễn Thái Ngọc Duy
2017-03-18 10:11   ` [PATCH v2 01/12] revision.h: new flag in struct rev_info wrt. worktree-related refs Nguyễn Thái Ngọc Duy
2017-03-18 10:11   ` [PATCH v2 02/12] revision.c: refactor add_index_objects_to_pending() Nguyễn Thái Ngọc Duy
2017-03-18 10:11   ` [PATCH v2 03/12] revision.c: --indexed-objects add objects from all worktrees Nguyễn Thái Ngọc Duy
2017-03-18 10:11   ` [PATCH v2 04/12] refs.c: refactor get_submodule_ref_store(), share common free block Nguyễn Thái Ngọc Duy
2017-03-18 10:11   ` [PATCH v2 05/12] refs: move submodule slash stripping code to get_submodule_ref_store Nguyễn Thái Ngọc Duy
2017-03-18 10:11   ` [PATCH v2 06/12] refs: add refs_head_ref() Nguyễn Thái Ngọc Duy
2017-03-18 10:11   ` [PATCH v2 07/12] revision.c: use refs_for_each*() instead of for_each_*_submodule() Nguyễn Thái Ngọc Duy
2017-03-18 10:11   ` [PATCH v2 08/12] refs: remove dead for_each_*_submodule() Nguyễn Thái Ngọc Duy
2017-03-18 10:11   ` [PATCH v2 09/12] revision.c: --all adds HEAD from all worktrees Nguyễn Thái Ngọc Duy
2017-03-18 10:11   ` [PATCH v2 10/12] files-backend: make reflog iterator go through per-worktree reflog Nguyễn Thái Ngọc Duy
2017-03-18 10:11   ` [PATCH v2 11/12] revision.c: --reflog add HEAD reflog from all worktrees Nguyễn Thái Ngọc Duy
2017-03-18 10:11   ` [PATCH v2 12/12] rev-list: expose and document --single-worktree Nguyễn Thái Ngọc Duy
2017-03-18 18:00     ` Junio C Hamano
2017-04-19 10:52       ` Duy Nguyen
2017-04-20  2:21         ` Junio C Hamano

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