[PATCH 1/4] submodule: implement `module_name` as a builtin helper
This implements the helper `module_name` in C instead of shell, yielding a nice performance boost.
Before this patch, I measured a time (best out of three):
$ time ./t7400-submodule-basic.sh >/dev/null
real 0m11.066s
user 0m3.348s
sys 0m8.534sWith this patch applied I measured (also best out of three)
$ time ./t7400-submodule-basic.sh >/dev/null
real 0m10.063s
user 0m3.044s
sys 0m7.487sSigned-off-by: Stefan Beller <sbeller@google.com>
---
builtin/submodule--helper.c | 23 +++++++++++++++++++++++
git-submodule.sh | 32 +++++++-------------------------
submodule.c | 18 +++++++++++++-----
submodule.h | 1 +
4 files changed, 44 insertions(+), 30 deletions(-)
Show changes to 4 files +44 −30
builtin/submodule--helper.c, git-submodule.sh, submodule.c, submodule.h
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index cb18ddf..3713c4c 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -5,6 +5,8 @@
#include "pathspec.h"
#include "dir.h"
#include "utf8.h"
+#include "submodule.h"
+#include "string-list.h"
static char *ps_matched;
static const struct cache_entry **ce_entries;
@@ -98,6 +100,24 @@ static int module_list(int argc, const char **argv, const char *prefix)
return 0;
}
+static int module_name(int argc, const char **argv, const char *prefix)
+{
+ const char *name;
+
+ if (argc != 1)
+ usage("git submodule--helper module_name <path>\n");
+
+ gitmodules_config();
+ name = submodule_name_for_path(argv[0]);
+
+ if (name)
+ printf("%s\n", name);
+ else
+ die("No submodule mapping found in .gitmodules for path '%s'", argv[0]);
+
+ return 0;
+}
+
int cmd_submodule__helper(int argc, const char **argv, const char *prefix)
{
if (argc < 2)
@@ -106,6 +126,9 @@ int cmd_submodule__helper(int argc, const char **argv, const char *prefix)
if (!strcmp(argv[1], "module_list"))
return module_list(argc - 1, argv + 1, prefix);
+ if (!strcmp(argv[1], "module_name"))
+ return module_name(argc - 2, argv + 2, prefix);
+
usage:
usage("git submodule--helper module_list\n");
}
diff --git a/git-submodule.sh b/git-submodule.sh
index af9ecef..e6ff38d 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -178,24 +178,6 @@ get_submodule_config () {
printf '%s' "${value:-$default}"
}
-
-#
-# Map submodule path to submodule name
-#
-# $1 = path
-#
-module_name()
-{
- # Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
- sm_path="$1"
- re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
- name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
- sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
- test -z "$name" &&
- die "$(eval_gettext "No submodule mapping found in .gitmodules for path '\$sm_path'")"
- printf '%s\n' "$name"
-}
-
#
# Clone a submodule
#
@@ -498,7 +480,7 @@ cmd_foreach()
then
displaypath=$(relative_path "$sm_path")
say "$(eval_gettext "Entering '\$prefix\$displaypath'")"
- name=$(module_name "$sm_path")
+ name=$(git submodule--helper module_name "$sm_path")
(
prefix="$prefix$sm_path/"
clear_local_git_env
@@ -554,7 +536,7 @@ cmd_init()
while read mode sha1 stage sm_path
do
die_if_unmatched "$mode"
- name=$(module_name "$sm_path") || exit
+ name=$(git submodule--helper module_name "$sm_path") || exit
displaypath=$(relative_path "$sm_path")
@@ -636,7 +618,7 @@ cmd_deinit()
while read mode sha1 stage sm_path
do
die_if_unmatched "$mode"
- name=$(module_name "$sm_path") || exit
+ name=$(git submodule--helper module_name "$sm_path") || exit
displaypath=$(relative_path "$sm_path")
@@ -758,7 +740,7 @@ cmd_update()
echo >&2 "Skipping unmerged submodule $prefix$sm_path"
continue
fi
- name=$(module_name "$sm_path") || exit
+ name=$(git submodule--helper module_name "$sm_path") || exit
url=$(git config submodule."$name".url)
branch=$(get_submodule_config "$name" branch master)
if ! test -z "$update"
@@ -1022,7 +1004,7 @@ cmd_summary() {
# Respect the ignore setting for --for-status.
if test -n "$for_status"
then
- name=$(module_name "$sm_path")
+ name=$(git submodule--helper module_name "$sm_path")
ignore_config=$(get_submodule_config "$name" ignore none)
test $status != A && test $ignore_config = all && continue
fi
@@ -1184,7 +1166,7 @@ cmd_status()
while read mode sha1 stage sm_path
do
die_if_unmatched "$mode"
- name=$(module_name "$sm_path") || exit
+ name=$(git submodule--helper module_name "$sm_path") || exit
url=$(git config submodule."$name".url)
displaypath=$(relative_path "$prefix$sm_path")
if test "$stage" = U
@@ -1261,7 +1243,7 @@ cmd_sync()
while read mode sha1 stage sm_path
do
die_if_unmatched "$mode"
- name=$(module_name "$sm_path")
+ name=$(git submodule--helper module_name "$sm_path")
url=$(git config -f .gitmodules --get submodule."$name".url)
# Possibly a url relative to parent
diff --git a/submodule.c b/submodule.c
index 15e90d1..872967f 100644
--- a/submodule.c
+++ b/submodule.c
@@ -686,6 +686,16 @@ static void calculate_changed_submodule_paths(void)
initialized_fetch_ref_tips = 0;
}
+const char* submodule_name_for_path(const char* path)
+{
+ struct string_list_item *item;
+ item = unsorted_string_list_lookup(&config_name_for_path, path);
+ if (item)
+ return item->util;
+ else
+ return NULL;
+}
+
int fetch_populated_submodules(const struct argv_array *options,
const char *prefix, int command_line_option,
int quiet)
@@ -693,7 +703,7 @@ int fetch_populated_submodules(const struct argv_array *options,
int i, result = 0;
struct child_process cp = CHILD_PROCESS_INIT;
struct argv_array argv = ARGV_ARRAY_INIT;
- struct string_list_item *name_for_path;
+ const char *name_for_path;
const char *work_tree = get_git_work_tree();
if (!work_tree)
goto out;
@@ -723,10 +733,8 @@ int fetch_populated_submodules(const struct argv_array *options,
if (!S_ISGITLINK(ce->ce_mode))
continue;
- name = ce->name;
- name_for_path = unsorted_string_list_lookup(&config_name_for_path, ce->name);
- if (name_for_path)
- name = name_for_path->util;
+ name_for_path = submodule_name_for_path(ce->name);
+ name = name_for_path ? name_for_path : ce->name;
default_argv = "yes";
if (command_line_option == RECURSE_SUBMODULES_DEFAULT) {
diff --git a/submodule.h b/submodule.h
index 7beec48..e3dd854 100644
--- a/submodule.h
+++ b/submodule.h
@@ -41,5 +41,6 @@ int find_unpushed_submodules(unsigned char new_sha1[20], const char *remotes_nam
struct string_list *needs_pushing);
int push_unpushed_submodules(unsigned char new_sha1[20], const char *remotes_name);
void connect_work_tree_and_git_dir(const char *work_tree, const char *git_dir);
+const char* submodule_name_for_path(const char* path);
#endif
--
2.5.0.239.g9728e1d.dirty
Stefan Beller
