This enables the work of the previous patches.

Signed-off-by: Stefan Beller <sbel...@google.com>
---
 Documentation/fetch-options.txt |  7 +++++++
 builtin/fetch.c                 |  5 ++++-
 builtin/pull.c                  |  6 ++++++
 submodule.c                     |  4 ++--
 t/t5526-fetch-submodules.sh     | 19 +++++++++++++++++++
 5 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/Documentation/fetch-options.txt b/Documentation/fetch-options.txt
index 45583d8..6b109f6 100644
--- a/Documentation/fetch-options.txt
+++ b/Documentation/fetch-options.txt
@@ -100,6 +100,13 @@ ifndef::git-pull[]
        reference to a commit that isn't already in the local submodule
        clone.
 
+-j::
+--jobs=<n>::
+       Number of parallel children to be used for fetching submodules.
+       Each will fetch from different submodules, such that fetching many
+       submodules will be faster. By default submodules will be fetched
+       one at a time.
+
 --no-recurse-submodules::
        Disable recursive fetching of submodules (this has the same effect as
        using the '--recurse-submodules=no' option).
diff --git a/builtin/fetch.c b/builtin/fetch.c
index 6620ed0..f28eac6 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -37,6 +37,7 @@ static int prune = -1; /* unspecified */
 static int all, append, dry_run, force, keep, multiple, update_head_ok, 
verbosity;
 static int progress = -1, recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
 static int tags = TAGS_DEFAULT, unshallow, update_shallow;
+static int max_children = 1;
 static const char *depth;
 static const char *upload_pack;
 static struct strbuf default_rla = STRBUF_INIT;
@@ -99,6 +100,8 @@ static struct option builtin_fetch_options[] = {
                    N_("fetch all tags and associated objects"), TAGS_SET),
        OPT_SET_INT('n', NULL, &tags,
                    N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
+       OPT_INTEGER('j', "jobs", &max_children,
+                   N_("number of submodules fetched in parallel")),
        OPT_BOOL('p', "prune", &prune,
                 N_("prune remote-tracking branches no longer on remote")),
        { OPTION_CALLBACK, 0, "recurse-submodules", NULL, N_("on-demand"),
@@ -1218,7 +1221,7 @@ int cmd_fetch(int argc, const char **argv, const char 
*prefix)
                                                    submodule_prefix,
                                                    recurse_submodules,
                                                    verbosity < 0,
-                                                   0);
+                                                   max_children);
                argv_array_clear(&options);
        }
 
diff --git a/builtin/pull.c b/builtin/pull.c
index 722a83c..f0af196 100644
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -94,6 +94,7 @@ static int opt_force;
 static char *opt_tags;
 static char *opt_prune;
 static char *opt_recurse_submodules;
+static char *max_children;
 static int opt_dry_run;
 static char *opt_keep;
 static char *opt_depth;
@@ -177,6 +178,9 @@ static struct option pull_options[] = {
                N_("on-demand"),
                N_("control recursive fetching of submodules"),
                PARSE_OPT_OPTARG),
+       OPT_PASSTHRU('j', "jobs", &max_children, N_("n"),
+               N_("number of submodules pulled in parallel"),
+               PARSE_OPT_OPTARG),
        OPT_BOOL(0, "dry-run", &opt_dry_run,
                N_("dry run")),
        OPT_PASSTHRU('k', "keep", &opt_keep, NULL,
@@ -524,6 +528,8 @@ static int run_fetch(const char *repo, const char 
**refspecs)
                argv_array_push(&args, opt_prune);
        if (opt_recurse_submodules)
                argv_array_push(&args, opt_recurse_submodules);
+       if (max_children)
+               argv_array_push(&args, max_children);
        if (opt_dry_run)
                argv_array_push(&args, "--dry-run");
        if (opt_keep)
diff --git a/submodule.c b/submodule.c
index a0e06e8..d15364f 100644
--- a/submodule.c
+++ b/submodule.c
@@ -759,10 +759,10 @@ int get_next_submodule(void *data, struct child_process 
*cp,
                strbuf_release(&submodule_prefix);
                if (ret) {
                        spf->count++;
-                       return 0;
+                       return 1;
                }
        }
-       return 1;
+       return 0;
 }
 
 unsigned is_submodule_modified(const char *path, int ignore_untracked)
diff --git a/t/t5526-fetch-submodules.sh b/t/t5526-fetch-submodules.sh
index 17759b1..1b4ce69 100755
--- a/t/t5526-fetch-submodules.sh
+++ b/t/t5526-fetch-submodules.sh
@@ -71,6 +71,16 @@ test_expect_success "fetch --recurse-submodules recurses 
into submodules" '
        test_i18ncmp expect.err actual.err
 '
 
+test_expect_success "fetch --recurse-submodules -j2 has the same output 
behaviour" '
+       add_upstream_commit &&
+       (
+               cd downstream &&
+               git fetch --recurse-submodules -j2 2>../actual.err
+       ) &&
+       test_must_be_empty actual.out &&
+       test_i18ncmp expect.err actual.err
+'
+
 test_expect_success "fetch alone only fetches superproject" '
        add_upstream_commit &&
        (
@@ -140,6 +150,15 @@ test_expect_success "--quiet propagates to submodules" '
        ! test -s actual.err
 '
 
+test_expect_success "--quiet propagates to parallel submodules" '
+       (
+               cd downstream &&
+               git fetch --recurse-submodules -j 2 --quiet  >../actual.out 
2>../actual.err
+       ) &&
+       ! test -s actual.out &&
+       ! test -s actual.err
+'
+
 test_expect_success "--dry-run propagates to submodules" '
        add_upstream_commit &&
        (
-- 
2.5.0.275.ge015d2a

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