This aims to make git-submodule foreach a builtin. This is the very
first step taken in this direction. Hence, 'foreach' is ported to
submodule--helper, and submodule--helper is called from git-submodule.sh.
The code is split up to have one function to obtain all the list of
submodules. This function acts as the front-end of git-submodule foreach
subcommand. It calls the function for_each_submodule_list, which basically
loops through the list and calls function fn, which in this case is
runcommand_in_submodule. This third function is a calling function that
takes care of running the command in that submodule, and recursively
perform the same when --recursive is flagged.
The first function module_foreach first parses the options present in
argv, and then with the help of module_list_compute, generates the list of
submodules present in the current working tree.
The second function for_each_submodule_list traverses through the
list, and calls function fn (which in case of submodule subcommand
foreach is runcommand_in_submodule) is called for each entry.
The third function runcommand_in_submodule, generates a submodule struct sub
for $name, value and then later prepends name=sub->name; and other
value assignment to the env argv_array structure of a child_process.
Also the <command> of submodule-foreach is push to args argv_array
structure and finally, using run_command the commands are executed
using a shell.
The third function also takes care of the recursive flag, by creating
a separate child_process structure and prepending "--super-prefix displaypath",
to the args argv_array structure. Other required arguments and the
input <command> of submodule-foreach is also appended to this argv_array.
Helped-by: Brandon Williams <bmw...@google.com>
Mentored-by: Christian Couder <christian.cou...@gmail.com>
Mentored-by: Stefan Beller <sbel...@google.com>
Signed-off-by: Prathamesh Chavan <pc44...@gmail.com>
---
builtin/submodule--helper.c | 129 ++++++++++++++++++++++++++++++++++++++++++++
git-submodule.sh | 39 +-------------
2 files changed, 130 insertions(+), 38 deletions(-)
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 94d6254f0..be278bf8d 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -765,6 +765,134 @@ static int module_name(int argc, const char **argv, const
char *prefix)
return 0;
}
+struct cb_foreach {
+ int argc;
+ const char **argv;
+ const char *prefix;
+ unsigned int quiet: 1;
+ unsigned int recursive: 1;
+};
+#define CB_FOREACH_INIT { 0, NULL, NULL, 0, 0 }
+
+static void runcommand_in_submodule(const struct cache_entry *list_item,
+ void *cb_data)
+{
+ struct cb_foreach *info = cb_data;
+ const struct submodule *sub;
+ struct child_process cp = CHILD_PROCESS_INIT;
+ char *displaypath;
+
+ displaypath = get_submodule_displaypath(list_item->name, info->prefix);
+
+ sub = submodule_from_path(null_sha1, list_item->name);
+
+ if (!sub)
+ die(_("No url found for submodule path '%s' in .gitmodules"),
+ displaypath);
+
+ if (!is_submodule_populated_gently(list_item->name, NULL))
+ goto cleanup;
+
+ prepare_submodule_repo_env(&cp.env_array);
+ /* For the purpose of executing <command> in the submodule,
+ * separate shell is used for the purpose of running the
+ * child process.
+ */
+ cp.use_shell = 1;
+ cp.dir = list_item->name;
+
+ if (info->argc == 1) {
+ char *toplevel = xgetcwd();
+
+ argv_array_pushf(&cp.env_array, "name=%s", sub->name);
+ argv_array_pushf(&cp.env_array, "sm_path=%s", list_item->name);
+ argv_array_pushf(&cp.env_array, "displaypath=%s", displaypath);
+ argv_array_pushf(&cp.env_array, "sha1=%s",
+ oid_to_hex(&list_item->oid));
+ argv_array_pushf(&cp.env_array, "toplevel=%s", toplevel);
+
+ /*
+ * Since still the path variable was accessible from the
+ * script before porting, it is also made available.
+ */
+ argv_array_pushf(&cp.args, "path=%s; %s",
+ list_item->name, info->argv[0]);
+ free(toplevel);
+ } else {
+ argv_array_pushv(&cp.args, info->argv);
+ }
+
+ if (!info->quiet)
+ printf(_("Entering '%s'\n"), displaypath);
+
+ if (info->argv[0] && run_command(&cp))
+ die(_("run_command returned non-zero status for %s\n."),
+ displaypath);
+
+ if (info->recursive) {
+ struct child_process cpr = CHILD_PROCESS_INIT;
+
+ cpr.git_cmd = 1;
+ cpr.dir = list_item->name;
+ prepare_submodule_repo_env(&cpr.env_array);
+
+ argv_array_pushl(&cpr.args, "--super-prefix", displaypath,
+ "submodule--helper", "foreach", "--recursive",
+ NULL);
+
+ if (info->quiet)
+ argv_array_push(&cpr.args, "--quiet");
+
+ argv_array_pushv(&cpr.args, info->argv);
+
+ if (run_command(&cpr))
+ die(_("run_command returned non-zero status while"
+ "recursing in the nested submodules of %s\n."),
+ displaypath);
+ }
+
+cleanup:
+ free(displaypath);
+}
+
+static int module_foreach(int argc, const char **argv, const char *prefix)
+{
+ struct cb_foreach info;
+ struct pathspec pathspec;
+ struct module_list list = MODULE_LIST_INIT;
+ int quiet = 0;
+ int recursive = 0;
+
+ struct option module_foreach_options[] = {
+ OPT__QUIET(&quiet, N_("Suppress output of entering each
submodule command")),
+ OPT_BOOL(0, "recursive", &recursive,
+ N_("Recurse into nested submodules")),
+ OPT_END()
+ };
+
+ const char *const git_submodule_helper_usage[] = {
+ N_("git submodule--helper foreach [--quiet] [--recursive]
<command>"),
+ NULL
+ };
+
+ argc = parse_options(argc, argv, prefix, module_foreach_options,
+ git_submodule_helper_usage,
PARSE_OPT_KEEP_UNKNOWN);
+
+ if (module_list_compute(0, NULL, prefix, &pathspec, &list) < 0)
+ BUG("module_list_compute should not choke on empty pathspec");
+
+ info.argc = argc;
+ info.argv = argv;
+ info.prefix = prefix;
+ info.quiet = !!quiet;
+ info.recursive = !!recursive;
+
+ gitmodules_config();
+ for_each_submodule_list(list, runcommand_in_submodule, &info);
+
+ return 0;
+}
+
struct module_cb {
unsigned int mod_src;
unsigned int mod_dst;
@@ -2203,6 +2331,7 @@ static struct cmd_struct commands[] = {
{"resolve-relative-url", resolve_relative_url, 0},
{"resolve-relative-url-test", resolve_relative_url_test, 0},
{"print-name-rev", print_name_rev, 0},
+ {"foreach", module_foreach, SUPPORT_SUPER_PREFIX},
{"init", module_init, SUPPORT_SUPER_PREFIX},
{"status", module_status, SUPPORT_SUPER_PREFIX},
{"print-default-remote", print_default_remote, 0},
diff --git a/git-submodule.sh b/git-submodule.sh
index 493a64372..e25b2c613 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -298,44 +298,7 @@ cmd_foreach()
shift
done
- toplevel=$(pwd)
-
- # dup stdin so that it can be restored when running the external
- # command in the subshell (and a recursive call to this function)
- exec 3<&0
-
- {
- git submodule--helper list --prefix "$wt_prefix" ||
- echo "#unmatched" $?
- } |
- while read -r mode sha1 stage sm_path
- do
- die_if_unmatched "$mode" "$sha1"
- if test -e "$sm_path"/.git
- then
- displaypath=$(git submodule--helper relative-path
"$prefix$sm_path" "$wt_prefix")
- say "$(eval_gettext "Entering '\$displaypath'")"
- name=$(git submodule--helper name "$sm_path")
- (
- prefix="$prefix$sm_path/"
- sanitize_submodule_env
- cd "$sm_path" &&
- # we make $path available to scripts ...
- path=$sm_path &&
- if test $# -eq 1
- then
- eval "$1"
- else
- "$@"
- fi &&
- if test -n "$recursive"
- then
- cmd_foreach "--recursive" "$@"
- fi
- ) <&3 3<&- ||
- die "$(eval_gettext "Stopping at '\$displaypath';
script returned non-zero status.")"
- fi
- done
+ git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"}
submodule--helper foreach ${GIT_QUIET:+--quiet} ${recursive:+--recursive} "$@"
}
#
--
2.13.0
