[PATCH v1 14/19] read-cache: touch shared index files when used

From: Christian Couder <christian.couder@gmail.com>
To: git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>,
	"Nguyen Thai Ngoc Duy" <pclouds@gmail.com>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
	"Christian Couder" <chriscool@tuxfamily.org>
Subject: [PATCH v1 14/19] read-cache: touch shared index files when used
Date: Sun, 23 Oct 2016 11:26:43 +0200	[thread overview]
Message-ID: <20161023092648.12086-15-chriscool@tuxfamily.org> (raw)
In-Reply-To: <20161023092648.12086-1-chriscool@tuxfamily.org>

When a split-index file is created, let's update the mtime of the
shared index file that the split-index file is referencing.

In a following commit we will make shared index file expire
depending on their mtime, so updating the mtime makes sure that
the shared index file will not be deleted soon.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
---
 read-cache.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/read-cache.c b/read-cache.c
index a91fabe..3aeff77 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -2268,6 +2268,12 @@ int write_locked_index(struct index_state *istate, struct lock_file *lock,
 		int ret = write_shared_index(istate, lock, flags);
 		if (ret)
 			return ret;
+	} else {
+		/* Signal that the shared index is used */
+		const char *shared_index = git_path("sharedindex.%s",
+						    sha1_to_hex(si->base_sha1));
+		if (!check_and_freshen_file(shared_index, 1))
+			warning("could not freshen '%s'", shared_index);
 	}
 
 	return write_split_index(istate, lock, flags);
-- 
2.10.1.462.g7e1e03a

