This teaches git-submodule the set-branch subcommand which allows the
branch of a submodule to be set through a porcelain command without
having to manually manipulate the .gitmodules file.
---
Documentation/git-submodule.txt | 7 ++
contrib/completion/git-completion.bash | 5 +-
git-submodule.sh | 75 +++++++++++++++++++--
t/t7419-submodule-set-branch.sh | 93 ++++++++++++++++++++++++++
4 files changed, 175 insertions(+), 5 deletions(-)
create mode 100755 t/t7419-submodule-set-branch.sh
diff --git a/Documentation/git-submodule.txt b/Documentation/git-submodule.txt
index 4150148fa3..6c608b3b8c 100644
--- a/Documentation/git-submodule.txt
+++ b/Documentation/git-submodule.txt
@@ -14,6 +14,7 @@ SYNOPSIS
'git submodule' [--quiet] init [--] [<path>...]
'git submodule' [--quiet] deinit [-f|--force] (--all|[--] <path>...)
'git submodule' [--quiet] update [<options>] [--] [<path>...]
+'git submodule' [--quiet] set-branch [<options>] [--] <path>
'git submodule' [--quiet] summary [<options>] [--] [<path>...]
'git submodule' [--quiet] foreach [--recursive] <command>
'git submodule' [--quiet] sync [--recursive] [--] [<path>...]
@@ -168,6 +169,12 @@ submodule with the `--init` option.
If `--recursive` is specified, this command will recurse into the
registered submodules, and update any nested submodules within.
--
+set-branch ((-d|--default)|(-b|--branch <branch>)) [--] <path>::
+ Sets the default remote tracking branch for the submodule. The
+ `--branch` option allows the remote branch to be specified. The
+ `--default` option removes the submodule.<name>.branch configuration
+ key, which causes the tracking branch to default to 'master'.
+--
summary [--cached|--files] [(-n|--summary-limit) <n>] [commit] [--] [<path>...]::
Show commit summary between the given commit (defaults to HEAD) and
working tree/index. For a submodule in question, a series of commits
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index de56879960..0fccadfc97 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -2573,7 +2573,7 @@ _git_submodule ()
{
__git_has_doubledash && return
- local subcommands="add status init deinit update summary foreach sync absorbgitdirs"
+ local subcommands="add status init deinit update set-branch summary foreach sync absorbgitdirs"
local subcommand="$(__git_find_on_cmdline "$subcommands")"
if [ -z "$subcommand" ]; then
case "$cur" in
@@ -2604,6 +2604,9 @@ _git_submodule ()
--force --rebase --merge --reference --depth --recursive --jobs
"
;;
+ set-branch,--*)
+ __gitcomp "--default --branch"
+ ;;
summary,--*)
__gitcomp "--cached --files --summary-limit"
;;
diff --git a/git-submodule.sh b/git-submodule.sh
index b5f2beee60..470f681573 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -10,6 +10,7 @@ USAGE="[--quiet] add [-b <branch>] [-f|--force] [--name <name>] [--reference <re
or: $dashless [--quiet] init [--] [<path>...]
or: $dashless [--quiet] deinit [-f|--force] (--all| [--] <path>...)
or: $dashless [--quiet] update [--init] [--remote] [-N|--no-fetch] [-f|--force] [--checkout|--merge|--rebase] [--[no-]recommend-shallow] [--reference <repository>] [--recursive] [--] [<path>...]
+ or: $dashless [--quiet] set-branch (--default|--branch <branch>) [--] <path>
or: $dashless [--quiet] summary [--cached|--files] [--summary-limit <n>] [commit] [--] [<path>...]
or: $dashless [--quiet] foreach [--recursive] <command>
or: $dashless [--quiet] sync [--recursive] [--] [<path>...]
@@ -684,6 +685,72 @@ cmd_update()
}
}
+#
+# Configures a submodule's default branch
+#
+# $@ = requested path
+#
+cmd_set_branch() {
+ unset_branch=false
+ branch=
+
+ while test $# -ne 0
+ do
+ case "$1" in
+ -q|--quiet)
+ # we don't do anything with this but we need to accept it
+ ;;
+ -d|--default)
+ unset_branch=true
+ ;;
+ -b|--branch)
+ case "$2" in '') usage ;; esac
+ branch=$2
+ shift
+ ;;
+ --)
+ shift
+ break
+ ;;
+ -*)
+ usage
+ ;;
+ *)
+ break
+ ;;
+ esac
+ shift
+ done
+
+ if test $# -ne 1
+ then
+ usage
+ fi
+
+ # we can't use `git submodule--helper name` here because internally, it
+ # hashes the path so a trailing slash could lead to an unintentional no match
+ name="$(git submodule--helper list "$1" | cut -f2)"
+ if test -z "$name"
+ then
+ exit 1
+ fi
+
+ test -n "$branch"; has_branch=$?
+ test "$unset_branch" = true; has_unset_branch=$?
+
+ if test $((!$has_branch != !$has_unset_branch)) -eq 0
+ then
+ usage
+ fi
+
+ if test $has_branch -eq 0
+ then
+ git submodule--helper config submodule."$name".branch "$branch"
+ else
+ git submodule--helper config --unset submodule."$name".branch
+ fi
+}
+
#
# Show commit summary for submodules in index or working tree
#
@@ -983,7 +1050,7 @@ cmd_absorbgitdirs()
while test $# != 0 && test -z "$command"
do
case "$1" in
- add | foreach | init | deinit | update | status | summary | sync | absorbgitdirs)
+ add | foreach | init | deinit | update | set-branch | status | summary | sync | absorbgitdirs)
command=$1
;;
-q|--quiet)
@@ -1024,8 +1091,8 @@ then
fi
fi
-# "-b branch" is accepted only by "add"
-if test -n "$branch" && test "$command" != add
+# "-b branch" is accepted only by "add" and "set-branch"
+if test -n "$branch" && (test "$command" != add || test "$command" != set-branch)
then
usage
fi
@@ -1036,4 +1103,4 @@ then
usage
fi
-"cmd_$command" "$@"
+"cmd_$(echo $command | sed -e s/-/_/g)" "$@"
diff --git a/t/t7419-submodule-set-branch.sh b/t/t7419-submodule-set-branch.sh
new file mode 100755
index 0000000000..c4b370ea85
--- /dev/null
+++ b/t/t7419-submodule-set-branch.sh
@@ -0,0 +1,93 @@
+#!/bin/sh
+#
+# Copyright (c) 2019 Denton Liu
+#
+
+test_description='Test submodules set-branch subcommand
+
+This test verifies that the set-branch subcommand of git-submodule is working
+as expected.
+'
+
+TEST_NO_CREATE_REPO=1
+. ./test-lib.sh
+
+test_expect_success 'submodule config cache setup' '
+ mkdir submodule &&
+ (cd submodule &&
+ git init &&
+ echo a >a &&
+ git add . &&
+ git commit -ma &&
+ git checkout -b topic &&
+ echo b >a &&
+ git add . &&
+ git commit -mb
+ ) &&
+ mkdir super &&
+ (cd super &&
+ git init &&
+ git submodule add ../submodule &&
+ git commit -m "add submodule"
+ )
+'
+
+test_expect_success 'ensure submodule branch is unset' '
+ (cd super &&
+ test_must_fail grep branch .gitmodules
+ )
+'
+
+test_expect_success 'test submodule set-branch --branch' '
+ (cd super &&
+ git submodule set-branch --branch topic submodule &&
+ grep "branch = topic" .gitmodules &&
+ git submodule update --remote &&
+ cat <<-\EOF >expect &&
+ b
+ EOF
+ git -C submodule show -s --pretty=%s >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success 'test submodule set-branch --default' '
+ (cd super &&
+ git submodule set-branch --default submodule &&
+ test_must_fail grep branch .gitmodules &&
+ git submodule update --remote &&
+ cat <<-\EOF >expect &&
+ a
+ EOF
+ git -C submodule show -s --pretty=%s >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success 'test submodule set-branch -b' '
+ (cd super &&
+ git submodule set-branch -b topic submodule &&
+ grep "branch = topic" .gitmodules &&
+ git submodule update --remote &&
+ cat <<-\EOF >expect &&
+ b
+ EOF
+ git -C submodule show -s --pretty=%s >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success 'test submodule set-branch -d' '
+ (cd super &&
+ git submodule set-branch -d submodule &&
+ test_must_fail grep branch .gitmodules &&
+ git submodule update --remote &&
+ cat <<-\EOF >expect &&
+ a
+ EOF
+ git -C submodule show -s --pretty=%s >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_done
--
2.20.1.522.g5f42c252e9
