'git submodule update --rebase' rebases your local branch on top of what
would have been checked out to a detached HEAD otherwise.
In some cases, detaching the HEAD when updating a submodule complicates
the workflow to commit to this submodule (checkout master, rebase, then
commit). For submodules that require frequent updates but infrequent
(if any) commits, a rebase can be executed directly by the git-submodule
command, ensuring that the submodules stay on their respective branches.
git-config key: submodule.$name.rebase (bool)
Signed-off-by: Peter Hutterer <peter.hutterer@xxxxxxxxx>
---
I figured if we're waiting for 1.6.3 anyway I might as well add support
for gitconfig to make this feature "complete".
Test cases are updated as well.
Cheers,
Peter
Documentation/git-submodule.txt | 14 ++++-
git-submodule.sh | 28 +++++++-
t/t7404-submodule-update.sh | 130 +++++++++++++++++++++++++++++++++++++++
3 files changed, 166 insertions(+), 6 deletions(-)
create mode 100755 t/t7404-submodule-update.sh
diff --git a/Documentation/git-submodule.txt b/Documentation/git-submodule.txt
index 3b8df44..0286409 100644
--- a/Documentation/git-submodule.txt
+++ b/Documentation/git-submodule.txt
@@ -12,7 +12,7 @@ SYNOPSIS
'git submodule' [--quiet] add [-b branch] [--] <repository> <path>
'git submodule' [--quiet] status [--cached] [--] [<path>...]
'git submodule' [--quiet] init [--] [<path>...]
-'git submodule' [--quiet] update [--init] [-N|--no-fetch] [--] [<path>...]
+'git submodule' [--quiet] update [--init] [-N|--no-fetch] [--rebase] [--] [<path>...]
'git submodule' [--quiet] summary [--summary-limit <n>] [commit] [--] [<path>...]
'git submodule' [--quiet] foreach <command>
'git submodule' [--quiet] sync [--] [<path>...]
@@ -113,7 +113,8 @@ init::
update::
Update the registered submodules, i.e. clone missing submodules and
checkout the commit specified in the index of the containing repository.
- This will make the submodules HEAD be detached.
+ This will make the submodules HEAD be detached unless '--rebase' is
+ specified or the key `submodule.$name.rebase` is set to `true`.
+
If the submodule is not yet initialized, and you just want to use the
setting as stored in .gitmodules, you can automatically initialize the
@@ -177,6 +178,15 @@ OPTIONS
This option is only valid for the update command.
Don't fetch new objects from the remote site.
+--rebase::
+ This option is only valid for the update command.
+ Rebase the current branch onto the commit recorded in the
+ superproject. If this option is given, the submodule's HEAD will not
+ be detached. If a a merge failure prevents this process, you will have
+ to resolve these failures with linkgit:git-rebase[1].
+ If the key `submodule.$name.rebase` is set to `true`, this option is
+ implicit.
+
<path>...::
Paths to submodule(s). When specified this will restrict the command
to only operate on the submodules found at the specified paths.
diff --git a/git-submodule.sh b/git-submodule.sh
index 7c2e060..c4ba19a 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -17,6 +17,7 @@ branch=
quiet=
cached=
nofetch=
+rebase=
#
# print stuff on stdout unless -q was specified
@@ -314,6 +315,10 @@ cmd_update()
shift
nofetch=1
;;
+ -r|--rebase)
+ shift
+ rebase=true
+ ;;
--)
shift
break
@@ -332,6 +337,7 @@ cmd_update()
do
name=$(module_name "$path") || exit
url=$(git config submodule."$name".url)
+ rebase_module=$(git config submodule."$name".rebase)
if test -z "$url"
then
# Only mention uninitialized submodules when its
@@ -352,6 +358,11 @@ cmd_update()
die "Unable to find current revision in submodule path '$path'"
fi
+ if test true = "$rebase"
+ then
+ rebase_module=true
+ fi
+
if test "$subsha1" != "$sha1"
then
force=
@@ -367,11 +378,20 @@ cmd_update()
die "Unable to fetch in submodule path '$path'"
fi
- (unset GIT_DIR; cd "$path" &&
- git-checkout $force -q "$sha1") ||
- die "Unable to checkout '$sha1' in submodule path '$path'"
+ if test true = "$rebase_module"
+ then
+ command="git-rebase"
+ action="rebase"
+ msg="rebased onto"
+ else
+ command="git-checkout $force -q"
+ action="checkout"
+ msg="checked out"
+ fi
- say "Submodule path '$path': checked out '$sha1'"
+ (unset GIT_DIR; cd "$path" && $command "$sha1") ||
+ die "Unable to $action '$sha1' in submodule path '$path'"
+ say "Submodule path '$path': $msg '$sha1'"
fi
done
}
diff --git a/t/t7404-submodule-update.sh b/t/t7404-submodule-update.sh
new file mode 100755
index 0000000..d70bae1
--- /dev/null
+++ b/t/t7404-submodule-update.sh
@@ -0,0 +1,130 @@
+#!/bin/sh
+#
+# Copyright (c) 2009 Red Hat, Inc.
+#
+
+test_description='Test updating submodules
+
+This test verifies that "git submodule update" detaches the HEAD of the
+submodule and "git submodule update --rebase" does not detach the HEAD.
+'
+
+. ./test-lib.sh
+
+
+compare_head()
+{
+ sha_master=`git-rev-list --max-count=1 master`
+ sha_head=`git-rev-list --max-count=1 HEAD`
+
+ test "$sha_master" = "$sha_head"
+}
+
+
+test_expect_success 'setup a submodule tree' '
+ echo file > file &&
+ git add file &&
+ test_tick &&
+ git commit -m upstream
+ git clone . super &&
+ git clone super submodule &&
+ (cd super &&
+ git submodule add ../submodule submodule &&
+ test_tick &&
+ git commit -m "submodule" &&
+ git submodule init submodule
+ ) &&
+ (cd submodule &&
+ echo "line2" > file &&
+ git add file &&
+ git commit -m "Commit 2"
+ ) &&
+ (cd super &&
+ (cd submodule &&
+ git pull --rebase origin
+ ) &&
+ git add submodule &&
+ git commit -m "submodule update"
+ )
+'
+
+test_expect_success 'submodule update detaching the HEAD ' '
+ (cd super/submodule &&
+ git reset --hard HEAD~1
+ ) &&
+ (cd super &&
+ (cd submodule &&
+ compare_head
+ ) &&
+ git submodule update submodule &&
+ cd submodule &&
+ ! compare_head
+ )
+'
+
+test_expect_success 'submodule update --rebase staying on master' '
+ (cd super/submodule &&
+ git checkout master
+ ) &&
+ (cd super &&
+ (cd submodule &&
+ compare_head
+ ) &&
+ git submodule update --rebase submodule &&
+ cd submodule &&
+ compare_head
+ )
+'
+
+test_expect_success 'submodule update - rebase true in .git/config' '
+ (cd super &&
+ git config submodule.submodule.rebase true
+ ) &&
+ (cd super/submodule &&
+ git reset --hard HEAD~1
+ ) &&
+ (cd super &&
+ (cd submodule &&
+ compare_head
+ ) &&
+ git submodule update submodule &&
+ cd submodule &&
+ compare_head
+ )
+'
+
+test_expect_success 'submodule update - rebase false in .git/config but --rebase given' '
+ (cd super &&
+ git config submodule.submodule.rebase false
+ ) &&
+ (cd super/submodule &&
+ git reset --hard HEAD~1
+ ) &&
+ (cd super &&
+ (cd submodule &&
+ compare_head
+ ) &&
+ git submodule update --rebase submodule &&
+ cd submodule &&
+ compare_head
+ )
+'
+
+test_expect_success 'submodule update - rebase false in .git/config' '
+ (cd super &&
+ git config submodule.submodule.rebase false
+ ) &&
+ (cd super/submodule &&
+ git reset --hard HEAD^
+ ) &&
+ (cd super &&
+ (cd submodule &&
+ compare_head
+ ) &&
+ git submodule update submodule &&
+ cd submodule &&
+ ! compare_head
+ )
+'
+
+test_done
--
1.6.3.rc1.2.gfa66a
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