[PATCH 8/8] submodules: allow parallel fetching, add tests and documentation
This enables the work of the previous patches.
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
Documentation/fetch-options.txt | 7 +++++++
builtin/fetch.c | 6 +++++-
builtin/pull.c | 6 ++++++
submodule.c | 3 +--
submodule.h | 2 +-
t/t5526-fetch-submodules.sh | 20 ++++++++++++++++++++
6 files changed, 40 insertions(+), 4 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 c85f347..586840d 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"),
@@ -1213,7 +1216,8 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
result = fetch_populated_submodules(&options,
submodule_prefix,
recurse_submodules,
- verbosity < 0);
+ verbosity < 0,
+ max_children);
argv_array_clear(&options);
}
diff --git a/builtin/pull.c b/builtin/pull.c
index 5145fc6..9e3c738 100644
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -95,6 +95,7 @@ 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;
@@ -178,6 +179,9 @@ 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,
@@ -525,6 +529,8 @@ 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 6a2d786..0b48734 100644
--- a/submodule.c
+++ b/submodule.c
@@ -729,10 +729,9 @@ static int fetch_finish(int retvalue, struct child_process *cp,
int fetch_populated_submodules(const struct argv_array *options,
const char *prefix, int command_line_option,
- int quiet)
+ int quiet, int max_parallel_jobs)
{
int i;
- int max_parallel_jobs = 1;
struct submodule_parallel_fetch spf = SPF_INIT;
spf.work_tree = get_git_work_tree();
diff --git a/submodule.h b/submodule.h
index 5507c3d..cbc0003 100644
--- a/submodule.h
+++ b/submodule.h
@@ -31,7 +31,7 @@ void set_config_fetch_recurse_submodules(int value);
void check_for_new_submodule_commits(unsigned char new_sha1[20]);
int fetch_populated_submodules(const struct argv_array *options,
const char *prefix, int command_line_option,
- int quiet);
+ int quiet, int max_parallel_jobs);
unsigned is_submodule_modified(const char *path, int ignore_untracked);
int submodule_uses_gitfile(const char *path);
int ok_to_remove_submodule(const char *path);
diff --git a/t/t5526-fetch-submodules.sh b/t/t5526-fetch-submodules.sh
index 17759b14..1241146 100755
--- a/t/t5526-fetch-submodules.sh
+++ b/t/t5526-fetch-submodules.sh
@@ -71,6 +71,17 @@ 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_TRACE=$(pwd)/../trace.out git fetch --recurse-submodules -j2 2>../actual.err
+ ) &&
+ test_must_be_empty actual.out &&
+ test_i18ncmp expect.err actual.err &&
+ grep "2 tasks" trace.out
+'
+
test_expect_success "fetch alone only fetches superproject" '
add_upstream_commit &&
(
@@ -140,6 +151,15 @@ 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 &&
(
--
2.6.4.443.ge094245.dirty
Stefan Beller <sbeller@google.com>