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authorÆvar Arnfjörð Bjarmason <avarab@gmail.com>2010-05-21 16:10:10 (GMT)
committerJunio C Hamano <gitster@pobox.com>2010-05-25 16:04:24 (GMT)
commitf030c96d8643fa0a1a9b2bd9c2f36a77721fb61f (patch)
treed94531921ac1a9208f28ac8e311c0469baa5a126
parent770c54170a43ffb3810088a85f25c59c0cbf7b38 (diff)
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git-submodule foreach: Add $toplevel variable
Add a $toplevel variable accessible to `git submodule foreach`, it contains the absolute path of the top level directory (where .gitmodules is). This makes it possible to e.g. read data in .gitmodules from within foreach commands. I'm using this to configure the branch names I want to track for each submodule: git submodule foreach 'git checkout $(git config --file $toplevel/.gitmodules submodule.$name.branch) && git pull' For a little history: This patch is borne out of my continuing fight of trying to have Git track the branches of submodules, not just their commits. Obviously that's not how they work (they only track commits), but I'm just interested in being able to do: git submodule foreach 'git pull' Of course that won't work because the submodule is in a disconnected head, so I first have to connect it, but connect it *to what*. For a while I was happy with this because as fate had it, it just so happened to do what I meant: git submodule foreach 'git checkout $(git describe --all --always) && git pull' But then that broke down, if there's a tag and a branch the tag will win out, and I can't git pull a branch: $ git branch -a * master remotes/origin/HEAD -> origin/master remotes/origin/master $ git tag -l release-0.0.6 $ git describe --always --all release-0.0.6 So I figured that I might as well start tracking the branches I want in .gitmodules itself: [submodule "yaml-mode"] path = yaml-mode url = git://github.com/yoshiki/yaml-mode.git branch = master So now I can just do (as stated above): git submodule foreach 'git checkout $(git config --file $toplevel/.gitmodules submodule.$name.branch) && git pull' Maybe there's a less painful way to do *that* (I'd love to hear about it). But regardless of that I think it's a good idea to be able to know what the top-level is from git submodule foreach. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--Documentation/git-submodule.txt6
-rwxr-xr-xgit-submodule.sh2
-rwxr-xr-xt/t7407-submodule-foreach.sh10
3 files changed, 13 insertions, 5 deletions
diff --git a/Documentation/git-submodule.txt b/Documentation/git-submodule.txt
index 2502531..cdabfd2 100644
--- a/Documentation/git-submodule.txt
+++ b/Documentation/git-submodule.txt
@@ -145,10 +145,12 @@ summary::
foreach::
Evaluates an arbitrary shell command in each checked out submodule.
- The command has access to the variables $name, $path and $sha1:
+ The command has access to the variables $name, $path, $sha1 and
+ $toplevel:
$name is the name of the relevant submodule section in .gitmodules,
$path is the name of the submodule directory relative to the
- superproject, and $sha1 is the commit as recorded in the superproject.
+ superproject, $sha1 is the commit as recorded in the superproject,
+ and $toplevel is the absolute path to the top-level of the superproject.
Any submodules defined in the superproject but not checked out are
ignored by this command. Unless given --quiet, foreach prints the name
of each submodule before evaluating the command.
diff --git a/git-submodule.sh b/git-submodule.sh
index 8175cb2..8c562a7 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -271,6 +271,8 @@ cmd_foreach()
shift
done
+ toplevel=$(pwd)
+
module_list |
while read mode sha1 stage path
do
diff --git a/t/t7407-submodule-foreach.sh b/t/t7407-submodule-foreach.sh
index 2a52775..db9365b 100755
--- a/t/t7407-submodule-foreach.sh
+++ b/t/t7407-submodule-foreach.sh
@@ -59,11 +59,13 @@ test_expect_success 'setup a submodule tree' '
sub1sha1=$(cd super/sub1 && git rev-parse HEAD)
sub3sha1=$(cd super/sub3 && git rev-parse HEAD)
+pwd=$(pwd)
+
cat > expect <<EOF
Entering 'sub1'
-foo1-sub1-$sub1sha1
+$pwd/clone-foo1-sub1-$sub1sha1
Entering 'sub3'
-foo3-sub3-$sub3sha1
+$pwd/clone-foo3-sub3-$sub3sha1
EOF
test_expect_success 'test basic "submodule foreach" usage' '
@@ -71,7 +73,9 @@ test_expect_success 'test basic "submodule foreach" usage' '
(
cd clone &&
git submodule update --init -- sub1 sub3 &&
- git submodule foreach "echo \$name-\$path-\$sha1" > ../actual
+ git submodule foreach "echo \$toplevel-\$name-\$path-\$sha1" > ../actual &&
+ git config foo.bar zar &&
+ git submodule foreach "git config --file \"\$toplevel/.git/config\" foo.bar"
) &&
test_cmp expect actual
'