[PATCH 3/4] run_auto_maintenance(): implicitly close the object store

["Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>]

From: Johannes Schindelin <johannes.schindelin@gmx.de>

Before spawning the auto maintenance, we need to make sure that we
release all open file handles to all the `.pack` files (and MIDX files
and commit-graph files and...) so that the maintenance process has the
freedom to delete those files.

So far, we did this manually every time before calling
`run_auto_maintenance()`. With the new `close_object_store` flag, we can
do that implicitly in that function, which is more robust because future
callers won't be able to forget to close the object store.

Note: this changes behavior slightly, as we previously _always_ closed
the object store, but now we only close the object store when actually
running the auto maintenance. In practice, this should not matter (if
anything, it might speed up operations where auto maintenance is
disabled).

Suggested-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 builtin/am.c     | 1 -
 builtin/fetch.c  | 2 --
 builtin/merge.c  | 1 -
 builtin/rebase.c | 1 -
 run-command.c    | 1 +
 5 files changed, 1 insertion(+), 5 deletions(-)

diff --git a/builtin/am.c b/builtin/am.c
index 0c2ad96b70e..f239e4ddde0 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -1848,7 +1848,6 @@ next:
 	 */
 	if (!state->rebasing) {
 		am_destroy(state);
-		close_object_store(the_repository->objects);
 		run_auto_maintenance(state->quiet);
 	}
 }
diff --git a/builtin/fetch.c b/builtin/fetch.c
index 25740c13df1..c9ac8664e18 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -2133,8 +2133,6 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
 					     NULL);
 	}
 
-	close_object_store(the_repository->objects);
-
 	if (enable_auto_gc)
 		run_auto_maintenance(verbosity < 0);
 
diff --git a/builtin/merge.c b/builtin/merge.c
index 22f23990b37..e4994e369af 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -469,7 +469,6 @@ static void finish(struct commit *head_commit,
 			 * We ignore errors in 'gc --auto', since the
 			 * user should see them.
 			 */
-			close_object_store(the_repository->objects);
 			run_auto_maintenance(verbosity < 0);
 		}
 	}
diff --git a/builtin/rebase.c b/builtin/rebase.c
index 33e09619005..ba09ebb9e66 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -740,7 +740,6 @@ static int finish_rebase(struct rebase_options *opts)
 	delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF);
 	unlink(git_path_auto_merge(the_repository));
 	apply_autostash(state_dir_path("autostash", opts));
-	close_object_store(the_repository->objects);
 	/*
 	 * We ignore errors in 'git maintenance run --auto', since the
 	 * user should see them.
diff --git a/run-command.c b/run-command.c
index e2dc6243774..229bdff9971 100644
--- a/run-command.c
+++ b/run-command.c
@@ -1891,6 +1891,7 @@ int run_auto_maintenance(int quiet)
 		return 0;
 
 	maint.git_cmd = 1;
+	maint.close_object_store = 1;
 	strvec_pushl(&maint.args, "maintenance", "run", "--auto", NULL);
 	strvec_push(&maint.args, quiet ? "--quiet" : "--no-quiet");
 
-- 
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