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From: Stefan Beller <sbeller@google.com>
To: sbeller@google.com
Cc: git@vger.kernel.org, jonathantanmy@google.com,
	sunshine@sunshineco.com, pclouds@gmail.com, l.s.r@web.de,
	sandals@crustytoothpaste.net
Subject: [PATCH 06/16] replace-object: check_replace_refs is safe in multi repo environment
Date: Mon,  9 Apr 2018 15:45:23 -0700
Message-ID: <20180409224533.17764-7-sbeller@google.com> (raw)
In-Reply-To: <20180409224533.17764-1-sbeller@google.com>

In e1111cef23 (inline lookup_replace_object() calls, 2011-05-15) a shortcut
for checking the object replacement was added by setting check_replace_refs
to 0 once the replacements were evaluated to not exist. This works fine in
with the assumption of only one repository in existence.

The assumption won't hold true any more when we work on multiple instances
of a repository structs (e.g. one struct per submodule), as the first
repository to be inspected may have no replacements and would set the
global variable. Other repositories would then completely omit their
evaluation of replacements.

This reverts back the meaning of the flag `check_replace_refs` of
"Do we need to check with the lookup table?" to "Do we need to read
the replacement definition?", adding the bypassing logic to
lookup_replace_object after the replacement definition was read.
As with the original patch, delay the renaming of the global variable

Signed-off-by: Stefan Beller <sbeller@google.com>
---
 environment.c    | 2 +-
 replace-object.c | 3 ---
 replace-object.h | 5 ++++-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/environment.c b/environment.c
index 39b3d906c8..b991fc0a87 100644
--- a/environment.c
+++ b/environment.c
@@ -50,7 +50,7 @@ const char *editor_program;
 const char *askpass_program;
 const char *excludes_file;
 enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
-int check_replace_refs = 1;
+int check_replace_refs = 1; /* NEEDSWORK: rename to read_replace_refs */
 char *git_replace_ref_base;
 enum eol core_eol = EOL_UNSET;
 int global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
diff --git a/replace-object.c b/replace-object.c
index 953fa9cc40..b2405f6027 100644
--- a/replace-object.c
+++ b/replace-object.c
@@ -41,9 +41,6 @@ static void prepare_replace_object(void)
 	oidmap_init(the_repository->objects->replace_map, 0);
 
 	for_each_replace_ref(register_replace_ref, NULL);
-
-	if (!the_repository->objects->replace_map->map.tablesize)
-		check_replace_refs = 0;
 }
 
 /* We allow "recursive" replacement. Only within reason, though */
diff --git a/replace-object.h b/replace-object.h
index 15315311fb..dbc51265ec 100644
--- a/replace-object.h
+++ b/replace-object.h
@@ -3,6 +3,7 @@
 
 #include "oidmap.h"
 #include "repository.h"
+#include "object-store.h"
 
 struct replace_object {
 	struct oidmap_entry original;
@@ -23,7 +24,9 @@ extern const struct object_id *do_lookup_replace_object(const struct object_id *
  */
 static inline const struct object_id *lookup_replace_object(const struct object_id *oid)
 {
-	if (!check_replace_refs)
+	if (!check_replace_refs ||
+	    (the_repository->objects->replace_map &&
+	     the_repository->objects->replace_map->map.tablesize == 0))
 		return oid;
 	return do_lookup_replace_object(oid);
 }
-- 
2.17.0.484.g0c8726318c-goog


  parent reply index

Thread overview: 91+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-06 23:21 [RFC PATCH 00/19] object-store refactoring 3 (replace objects, main ref store) Stefan Beller
2018-04-06 23:21 ` [PATCH 01/19] replace_object.c: rename to use dash in file name Stefan Beller
2018-04-06 23:21 ` [PATCH 02/19] replace-object: move replace_object to object store Stefan Beller
2018-04-09 13:51   ` Derrick Stolee
2018-04-06 23:21 ` [PATCH 03/19] object-store: move lookup_replace_object to replace-object.h Stefan Beller
2018-04-06 23:21 ` [PATCH 04/19] replace-object: move replace objects prepared flag to object store Stefan Beller
2018-04-06 23:21 ` [PATCH 05/19] replace-object: check_replace_refs is safe in multi repo environment Stefan Beller
2018-04-06 23:21 ` [PATCH 06/19] refs: add repository argument to get_main_ref_store Stefan Beller
2018-04-07  6:53   ` Eric Sunshine
2018-04-09 18:51     ` Stefan Beller
2018-04-06 23:21 ` [PATCH 07/19] refs: add repository argument to for_each_replace_ref Stefan Beller
2018-04-06 23:21 ` [PATCH 08/19] replace-object: add repository argument to replace_object_pos Stefan Beller
2018-04-06 23:21 ` [PATCH 09/19] replace-object: add repository argument to register_replace_object Stefan Beller
2018-04-06 23:21 ` [PATCH 10/19] replace-object: add repository argument to prepare_replace_object Stefan Beller
2018-04-06 23:21 ` [PATCH 11/19] replace-object: add repository argument to do_lookup_replace_object Stefan Beller
2018-04-06 23:21 ` [PATCH 12/19] replace-object: add repository argument to lookup_replace_object Stefan Beller
2018-04-06 23:21 ` [PATCH 13/19] refs: store the main ref store inside the repository struct Stefan Beller
2018-04-07  6:54   ` Eric Sunshine
2018-04-06 23:21 ` [PATCH 14/19] refs: allow for_each_replace_ref to handle arbitrary repositories Stefan Beller
2018-04-06 23:21 ` [PATCH 15/19] replace-object: allow replace_object_pos " Stefan Beller
2018-04-06 23:21 ` [PATCH 16/19] replace-object: allow register_replace_object " Stefan Beller
2018-04-06 23:21 ` [PATCH 17/19] replace-object: allow prepare_replace_object " Stefan Beller
2018-04-06 23:21 ` [PATCH 18/19] replace-object: allow do_lookup_replace_object " Stefan Beller
2018-04-06 23:21 ` [PATCH 19/19] replace-object: allow lookup_replace_object " Stefan Beller
2018-04-07  4:58 ` [RFC PATCH 00/19] object-store refactoring 3 (replace objects, main ref store) René Scharfe
2018-04-09 17:44   ` Stefan Beller
2018-04-07  9:50 ` Duy Nguyen
2018-04-09 17:39   ` Stefan Beller
2018-04-09 13:58 ` Derrick Stolee
     [not found] ` <nycvar.QRO.7.76.6.1804091038430.55@ZVAVAG-6OXH6DA.rhebcr.pbec.zvpebfbsg.pbz>
2018-04-09 17:36   ` Stefan Beller
2018-04-09 22:45 ` [PATCHv2 00/16] " Stefan Beller
2018-04-09 22:45   ` [PATCH 01/16] replace_object: use oidmap Stefan Beller
2018-04-10  2:57     ` Junio C Hamano
2018-04-09 22:45   ` [PATCH 02/16] replace_object.c: rename to use dash in file name Stefan Beller
2018-04-10  3:00     ` Junio C Hamano
2018-04-10 17:57       ` Stefan Beller
2018-04-10 21:26       ` [PATCH 0/6] Rename files to use dashes instead of underscores Stefan Beller
2018-04-10 21:26         ` [PATCH 1/6] write_or_die.c: rename to use dashes in file name Stefan Beller
2018-04-10 21:26         ` [PATCH 2/6] unicode_width.h: rename to use dash " Stefan Beller
2018-04-10 21:26         ` [PATCH 3/6] exec_cmd: " Stefan Beller
2018-04-10 21:26         ` [PATCH 4/6] sha1_name.c: " Stefan Beller
2018-04-10 21:26         ` [PATCH 5/6] sha1_file.c: " Stefan Beller
2018-04-10 21:26         ` [PATCH 6/6] replace_object.c: " Stefan Beller
2018-04-10 21:28         ` [PATCH 0/6] Rename files to use dashes instead of underscores Stefan Beller
2018-04-10 22:39         ` Johannes Schindelin
2018-04-10 22:47           ` Stefan Beller
2018-04-11 23:13         ` brian m. carlson
2018-04-09 22:45   ` [PATCH 03/16] replace-object: move replace_map to object store Stefan Beller
2018-04-10  3:10     ` Junio C Hamano
2018-04-09 22:45   ` [PATCH 04/16] object-store: move lookup_replace_object to replace-object.h Stefan Beller
2018-04-09 22:45   ` [PATCH 05/16] replace-object: eliminate replace objects prepared flag Stefan Beller
2018-04-10  3:21     ` Junio C Hamano
2018-04-10  7:32     ` René Scharfe
2018-04-09 22:45   ` Stefan Beller [this message]
2018-04-10  3:37     ` [PATCH 06/16] replace-object: check_replace_refs is safe in multi repo environment Junio C Hamano
2018-04-09 22:45   ` [PATCH 07/16] refs: add repository argument to get_main_ref_store Stefan Beller
2018-04-10 13:36     ` Michael Haggerty
2018-04-10 18:27       ` Stefan Beller
2018-04-09 22:45   ` [PATCH 08/16] refs: add repository argument to for_each_replace_ref Stefan Beller
2018-04-09 22:45   ` [PATCH 09/16] replace-object: add repository argument to prepare_replace_object Stefan Beller
2018-04-09 22:45   ` [PATCH 10/16] replace-object: add repository argument to do_lookup_replace_object Stefan Beller
2018-04-09 22:45   ` [PATCH 11/16] replace-object: add repository argument to lookup_replace_object Stefan Beller
2018-04-09 22:45   ` [PATCH 12/16] refs: store the main ref store inside the repository struct Stefan Beller
2018-04-09 23:24     ` Brandon Williams
2018-04-09 23:29       ` Stefan Beller
2018-04-09 23:35         ` Brandon Williams
2018-04-10 14:02     ` Michael Haggerty
2018-04-10 18:38       ` Stefan Beller
2018-04-09 22:45   ` [PATCH 13/16] refs: allow for_each_replace_ref to handle arbitrary repositories Stefan Beller
2018-04-09 22:45   ` [PATCH 14/16] replace-object: allow prepare_replace_object " Stefan Beller
2018-04-09 22:45   ` [PATCH 15/16] replace-object: allow do_lookup_replace_object " Stefan Beller
2018-04-09 22:45   ` [PATCH 16/16] replace-object: allow lookup_replace_object " Stefan Beller
2018-04-09 23:25   ` [PATCHv2 00/16] object-store refactoring 3 (replace objects, main ref store) Brandon Williams
2018-04-09 23:31     ` Stefan Beller
2018-04-12  0:21   ` [PATCHv3 00/15] replace_object.c: rename to use dash in file name Stefan Beller
2018-04-12  0:21     ` [PATCH 01/15] replace_object: use oidmap Stefan Beller
2018-04-12  0:21     ` [PATCH 02/15] replace-object: move replace_map to object store Stefan Beller
2018-04-12  0:21     ` [PATCH 03/15] object-store: move lookup_replace_object to replace-object.h Stefan Beller
2018-04-12  0:21     ` [PATCH 04/15] replace-object: eliminate replace objects prepared flag Stefan Beller
2018-04-12  0:21     ` [PATCH 05/15] replace-object: check_replace_refs is safe in multi repo environment Stefan Beller
2018-04-12  0:21     ` [PATCH 06/15] refs: add repository argument to get_main_ref_store Stefan Beller
2018-04-12  0:21     ` [PATCH 07/15] refs: add repository argument to for_each_replace_ref Stefan Beller
2018-04-12  0:21     ` [PATCH 08/15] replace-object: add repository argument to prepare_replace_object Stefan Beller
2018-04-12  0:21     ` [PATCH 09/15] replace-object: add repository argument to do_lookup_replace_object Stefan Beller
2018-04-12  0:21     ` [PATCH 10/15] replace-object: add repository argument to lookup_replace_object Stefan Beller
2018-04-12  0:21     ` [PATCH 11/15] refs: store the main ref store inside the repository struct Stefan Beller
2018-04-12  0:21     ` [PATCH 12/15] refs: allow for_each_replace_ref to handle arbitrary repositories Stefan Beller
2018-04-12  0:21     ` [PATCH 13/15] replace-object: allow prepare_replace_object " Stefan Beller
2018-04-12  0:21     ` [PATCH 14/15] replace-object: allow do_lookup_replace_object " Stefan Beller
2018-04-12  0:21     ` [PATCH 15/15] replace-object: allow lookup_replace_object " Stefan Beller
2018-04-12 11:43     ` [PATCHv3 00/15] replace_object.c: rename to use dash in file name Derrick Stolee

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