git submodule status: Add --recursive to recurse into nested submodules

In very large and hierarchically structured projects, one may encounter
nested submodules. In these situations, it is valuable to not only show
status for all the submodules in the current repo (which is what is
currently done by 'git submodule status'), but also to show status for
all submodules at all levels (i.e. recursing into nested submodules as
well).

This patch teaches the new --recursive option to the 'git submodule status'
command. The patch also includes documentation and selftests.

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

diff --git a/Documentation/git-submodule.txt b/Documentation/git-submodule.txt
index 55bbc4f..b81c830 100644 (file)
--- a/Documentation/git-submodule.txt
+++ b/Documentation/git-submodule.txt
@@ -11,7 +11,7 @@ SYNOPSIS
 [verse]
 'git submodule' [--quiet] add [-b branch]
              [--reference <repository>] [--] <repository> <path>
-'git submodule' [--quiet] status [--cached] [--] [<path>...]
+'git submodule' [--quiet] status [--cached] [--recursive] [--] [<path>...]
 'git submodule' [--quiet] init [--] [<path>...]
 'git submodule' [--quiet] update [--init] [-N|--no-fetch] [--rebase]
              [--reference <repository>] [--merge] [--recursive] [--] [<path>...]
@@ -100,6 +100,9 @@ status::
        initialized and `+` if the currently checked out submodule commit
        does not match the SHA-1 found in the index of the containing
        repository. This command is the default command for 'git-submodule'.
++
+If '--recursive' is specified, this command will recurse into nested
+submodules, and show their status as well.
 
 init::
        Initialize the submodules, i.e. register each submodule name
@@ -216,7 +219,7 @@ OPTIONS
 for linkgit:git-clone[1]'s --reference and --shared options carefully.
 
 --recursive::
-       This option is only valid for foreach and update commands.
+       This option is only valid for foreach, update and status commands.
        Traverse submodules recursively. The operation is performed not
        only in the submodules of the current repo, but also
        in any nested submodules inside those submodules (and so on).

diff --git a/git-submodule.sh b/git-submodule.sh
index d8b98ff..446bbc0 100755 (executable)
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -6,7 +6,7 @@
 
 dashless=$(basename "$0" | sed -e 's/-/ /')
 USAGE="[--quiet] add [-b branch] [--reference <repository>] [--] <repository> <path>
-   or: $dashless [--quiet] status [--cached] [--] [<path>...]
+   or: $dashless [--quiet] status [--cached] [--recursive] [--] [<path>...]
    or: $dashless [--quiet] init [--] [<path>...]
    or: $dashless [--quiet] update [--init] [-N|--no-fetch] [--rebase] [--reference <repository>] [--merge] [--recursive] [--] [<path>...]
    or: $dashless [--quiet] summary [--cached] [--summary-limit <n>] [commit] [--] [<path>...]
@@ -690,6 +690,7 @@ cmd_summary() {
 cmd_status()
 {
        # parse $args after "submodule ... status".
+       orig_args="$@"
        while test $# -ne 0
        do
                case "$1" in
@@ -699,6 +700,9 @@ cmd_status()
                --cached)
                        cached=1
                        ;;
+               --recursive)
+                       recursive=1
+                       ;;
                --)
                        shift
                        break
@@ -718,22 +722,34 @@ cmd_status()
        do
                name=$(module_name "$path") || exit
                url=$(git config submodule."$name".url)
+               displaypath="$prefix$path"
                if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
                then
-                       say "-$sha1 $path"
+                       say "-$sha1 $displaypath"
                        continue;
                fi
                set_name_rev "$path" "$sha1"
                if git diff-files --quiet -- "$path"
                then
-                       say " $sha1 $path$revname"
+                       say " $sha1 $displaypath$revname"
                else
                        if test -z "$cached"
                        then
                                sha1=$(unset GIT_DIR; cd "$path" && git rev-parse --verify HEAD)
                                set_name_rev "$path" "$sha1"
                        fi
-                       say "+$sha1 $path$revname"
+                       say "+$sha1 $displaypath$revname"
+               fi
+
+               if test -n "$recursive"
+               then
+                       (
+                               prefix="$displaypath/"
+                               unset GIT_DIR
+                               cd "$path" &&
+                               cmd_status $orig_args
+                       ) ||
+                       die "Failed to recurse into submodule path '$path'"
                fi
        done
 }

diff --git a/t/t7407-submodule-foreach.sh b/t/t7407-submodule-foreach.sh
index 9122bfe..de1730d 100755 (executable)
--- a/t/t7407-submodule-foreach.sh
+++ b/t/t7407-submodule-foreach.sh
@@ -194,4 +194,30 @@ test_expect_success 'use "update --recursive" to checkout all submodules' '
        )
 '
 
+nested1sha1=$(cd clone3/nested1 && git rev-parse HEAD)
+nested2sha1=$(cd clone3/nested1/nested2 && git rev-parse HEAD)
+nested3sha1=$(cd clone3/nested1/nested2/nested3 && git rev-parse HEAD)
+submodulesha1=$(cd clone3/nested1/nested2/nested3/submodule && git rev-parse HEAD)
+sub1sha1=$(cd clone3/sub1 && git rev-parse HEAD)
+sub2sha1=$(cd clone3/sub2 && git rev-parse HEAD)
+sub3sha1=$(cd clone3/sub3 && git rev-parse HEAD)
+
+cat > expect <<EOF
+ $nested1sha1 nested1 (heads/master)
+ $nested2sha1 nested1/nested2 (heads/master)
+ $nested3sha1 nested1/nested2/nested3 (heads/master)
+ $submodulesha1 nested1/nested2/nested3/submodule (heads/master)
+ $sub1sha1 sub1 (${sub1sha1:0:7})
+ $sub2sha1 sub2 (${sub1sha1:0:7})
+ $sub3sha1 sub3 (heads/master)
+EOF
+
+test_expect_success 'test "status --recursive"' '
+       (
+               cd clone3 &&
+               git submodule status --recursive > ../actual
+       ) &&
+       test_cmp expect actual
+'
+
 test_done