[PATCHv20 00/12] Expose submodule parallelism to the user

Thanks Duy for reviewing!
I added your suggestions as amending and as a new patch.

Thanks,
Stefan

Interdiff to v19 (current origin/sb/submodule-parallel-update):

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 0272c98..1b0b13a 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c

@@ -299,10 +299,10 @@ static int prepare_to_clone_next_submodule(const struct cache_entry *ce,
 
 	if (ce_stage(ce)) {
 		if (suc->recursive_prefix) {
-			strbuf_addf(out, "Skipping unmerged submodule %s/%s\n",
+			strbuf_addf(out,_("Skipping unmerged submodule %s/%s\n"),
 				    suc->recursive_prefix, ce->name);
 		} else {
-			strbuf_addf(out, "Skipping unmerged submodule %s\n",
+			strbuf_addf(out, _("Skipping unmerged submodule %s\n"),
 				    ce->name);
 		}
 		goto cleanup;

@@ -319,7 +319,7 @@ static int prepare_to_clone_next_submodule(const struct cache_entry *ce,
 	if (suc->update.type == SM_UPDATE_NONE
 	    || (suc->update.type == SM_UPDATE_UNSPECIFIED
 		&& sub->update_strategy.type == SM_UPDATE_NONE)) {
-		strbuf_addf(out, "Skipping submodule '%s'\n",
+		strbuf_addf(out, _("Skipping submodule '%s'\n"),
 			    displaypath);
 		goto cleanup;
 	}

@@ -525,13 +525,13 @@ int cmd_submodule__helper(int argc, const char **argv, const char *prefix)
 {
 	int i;
 	if (argc < 2)
-		die(_("fatal: submodule--helper subcommand must be "
+		die(_("submodule--helper subcommand must be "
 		      "called with a subcommand"));
 
 	for (i = 0; i < ARRAY_SIZE(commands); i++)
 		if (!strcmp(argv[1], commands[i].cmd))
 			return commands[i].fn(argc - 1, argv + 1, prefix);
 
-	die(_("fatal: '%s' is not a valid submodule--helper "
+	die(_("'%s' is not a valid submodule--helper "
 	      "subcommand"), argv[1]);
 }

Stefan Beller (12):
  submodule-config: keep update strategy around
  submodule-config: drop check against NULL
  fetching submodules: respect `submodule.fetchJobs` config option
  submodule update: direct error message to stderr
  run_processes_parallel: treat output of children as byte array
  run-command: expose default_{start_failure, task_finished}
  run_processes_parallel: rename parameters for the callbacks
  run_processes_parallel: correctly terminate callbacks with an LF
  git submodule update: have a dedicated helper for cloning
  submodule helper: remove double 'fatal: ' prefix
  submodule update: expose parallelism to the user
  clone: allow an explicit argument for parallel submodule clones

 Documentation/config.txt        |   6 +
 Documentation/git-clone.txt     |   6 +-
 Documentation/git-submodule.txt |   7 +-
 builtin/clone.c                 |  19 ++-
 builtin/fetch.c                 |   2 +-
 builtin/submodule--helper.c     | 259 +++++++++++++++++++++++++++++++++++++++-
 git-submodule.sh                |  56 ++++-----
 run-command.c                   |  36 +++---
 run-command.h                   |  29 ++++-
 strbuf.c                        |   6 +
 strbuf.h                        |   6 +
 submodule-config.c              |  19 ++-
 submodule-config.h              |   2 +
 submodule.c                     |  37 +++++-
 submodule.h                     |  18 +++
 t/t5526-fetch-submodules.sh     |  14 +++
 t/t7400-submodule-basic.sh      |   4 +-
 t/t7406-submodule-update.sh     |  27 +++++
 18 files changed, 480 insertions(+), 73 deletions(-)

-- 
2.7.0.rc0.37.gb7b9e8e