git clone: Add --recursive to automatically checkout (nested) submodules

Many projects using submodules expect all submodules to be checked out
in order to build/work correctly. A common command sequence for
developers on such projects is:

git clone url/to/project
cd project
git submodule update --init (--recursive)

This patch introduces the --recursive option to git-clone. The new
option causes git-clone to recursively clone and checkout all
submodules of the cloned project. Hence, the above command sequence
can be reduced to:

git clone --recursive url/to/project

--recursive is ignored if no checkout is done by the git-clone.

The patch also includes documentation and a selftest.

Signed-off-by: Johan Herland <johan@herland.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-clone.txt b/Documentation/git-clone.txt
index b14de6c407b8bd0bc001c608ca4f26fc619abf3e..5a685ceec94b75faa5a0a90cd46e76e45a42555a 100644 (file)
--- a/Documentation/git-clone.txt
+++ b/Documentation/git-clone.txt
@@ -12,7 +12,7 @@ SYNOPSIS
 'git clone' [--template=<template_directory>]
          [-l] [-s] [--no-hardlinks] [-q] [-n] [--bare] [--mirror]
          [-o <name>] [-u <upload-pack>] [--reference <repository>]
-         [--depth <depth>] [--] <repository> [<directory>]
+         [--depth <depth>] [--recursive] [--] <repository> [<directory>]
 
 DESCRIPTION
 -----------
@@ -139,6 +139,14 @@ then the cloned repository will become corrupt.
        with a long history, and would want to send in fixes
        as patches.
 
+--recursive::
+       After the clone is created, initialize all submodules within,
+       using their default settings. This is equivalent to running
+       'git submodule update --init --recursive' immediately after
+       the clone is finished. This option is ignored if the cloned
+       repository does not have a worktree/checkout (i.e. if any of
+       `--no-checkout`/`-n`, `--bare`, or `--mirror` is given)
+
 <repository>::
        The (possibly remote) repository to clone from.  See the
        <<URLS,URLS>> section below for more information on specifying

diff --git a/builtin-clone.c b/builtin-clone.c
index 32dea74d78381ca1dffdac7f88e45a89a9825104..0d2b4a8200ec10b2f6972cc3b7ddbb7a5b833b54 100644 (file)
--- a/builtin-clone.c
+++ b/builtin-clone.c
@@ -38,7 +38,7 @@ static const char * const builtin_clone_usage[] = {
 };
 
 static int option_quiet, option_no_checkout, option_bare, option_mirror;
-static int option_local, option_no_hardlinks, option_shared;
+static int option_local, option_no_hardlinks, option_shared, option_recursive;
 static char *option_template, *option_reference, *option_depth;
 static char *option_origin = NULL;
 static char *option_upload_pack = "git-upload-pack";
@@ -59,6 +59,8 @@ static struct option builtin_clone_options[] = {
                    "don't use local hardlinks, always copy"),
        OPT_BOOLEAN('s', "shared", &option_shared,
                    "setup as shared repository"),
+       OPT_BOOLEAN(0, "recursive", &option_recursive,
+                   "setup as shared repository"),
        OPT_STRING(0, "template", &option_template, "path",
                   "path the template repository"),
        OPT_STRING(0, "reference", &option_reference, "repo",
@@ -73,6 +75,10 @@ static struct option builtin_clone_options[] = {
        OPT_END()
 };
 
+static const char *argv_submodule[] = {
+       "submodule", "update", "--init", "--recursive", NULL
+};
+
 static char *get_repo_path(const char *repo, int *is_bundle)
 {
        static char *suffix[] = { "/.git", ".git", "" };
@@ -608,6 +614,9 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
                err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
                                sha1_to_hex(remote_head->old_sha1), "1", NULL);
+
+               if (!err && option_recursive)
+                       err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
        }
 
        strbuf_release(&reflog_msg);

diff --git a/t/t7407-submodule-foreach.sh b/t/t7407-submodule-foreach.sh
index 519db49ea6dfa2b9b70b836898c2c90f4630ef79..2a527750ce4a81bc168b8ad3d8b09174f487b142 100755 (executable)
--- a/t/t7407-submodule-foreach.sh
+++ b/t/t7407-submodule-foreach.sh
@@ -222,4 +222,16 @@ test_expect_success 'test "status --recursive"' '
        test_cmp expect actual
 '
 
+test_expect_success 'use "git clone --recursive" to checkout all submodules' '
+       git clone --recursive super clone4 &&
+       test -d clone4/.git &&
+       test -d clone4/sub1/.git &&
+       test -d clone4/sub2/.git &&
+       test -d clone4/sub3/.git &&
+       test -d clone4/nested1/.git &&
+       test -d clone4/nested1/nested2/.git &&
+       test -d clone4/nested1/nested2/nested3/.git &&
+       test -d clone4/nested1/nested2/nested3/submodule/.git
+'
+
 test_done