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git-submodule: work with GIT_DIR/GIT_WORK_TREE

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The combination of GIT_DIR and GIT_WORK_TREE can be used to manage
files in one directory hierarchy while keeping the repository that
keeps track of them outside the directory hierarchy.  For example:

    git init --bare /path/to/there
    alias dotfiles="GIT_DIR=/path/to/there GIT_WORK_TREE=/path/to/here git"

    cd /path/to/here
    dotfiles add file
    dotfiles commit -a -m "add /path/to/here/file"
    ...

lets you manage files under /path/to/here/ in the repository located
at /path/to/there.

git-submodule however fails to add submodules, as it is confused by
GIT_DIR and GIT_WORK_TREE environment variables when it tries to
work in the submodule, like so:

    dotfiles submodule add http://path.to/submodule
    fatal: working tree '/path/to/here' already exists.

Simply unsetting the environment where the command works on the
submodule is sufficient to fix this, as it has set things up so
that GIT_DIR and GIT_WORK_TREE do not even have to point at the
repository and the working tree of the submodule.

Signed-off-by: Daniel Graña <dangra@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Daniel Graña 2012-07-22 11:49:44 -03:00 committed by Junio C Hamano
parent 476109fa4c
commit be8779f7ac
2 changed files with 66 additions and 2 deletions
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7
git-submodule.sh
View file

@ -181,8 +181,11 @@ module_clone()
rm -f "$gitdir/index"
else
mkdir -p "$gitdir_base"
git clone $quiet -n ${reference:+"$reference"} \
--separate-git-dir "$gitdir" "$url" "$sm_path" ||
(
clear_local_git_env
git clone $quiet -n ${reference:+"$reference"} \
--separate-git-dir "$gitdir" "$url" "$sm_path"
) ||
die "$(eval_gettext "Clone of '\$url' into submodule path '\$sm_path' failed")"
fi

61
t/t7409-submodule-detached-worktree.sh Normal file
View file

@ -0,0 +1,61 @@
#!/bin/sh
#
# Copyright (c) 2012 Daniel Graña
#
test_description='Test submodules on detached working tree
This test verifies that "git submodule" initialization, update and addition works
on detahced working trees
'
TEST_NO_CREATE_REPO=1
. ./test-lib.sh
test_expect_success 'submodule on detached working tree' '
git init --bare remote &&
test_create_repo bundle1 &&
(cd bundle1 && test_commit "shoot") &&
mkdir home &&
(
cd home &&
export GIT_WORK_TREE="$(pwd)" GIT_DIR="$(pwd)/.dotfiles" &&
git clone --bare ../remote .dotfiles &&
git submodule add ../bundle1 .vim/bundle/sogood &&
test_commit "sogood" &&
git push origin master
) &&
mkdir home2 &&
(
cd home2 &&
export GIT_WORK_TREE="$(pwd)" GIT_DIR="$(pwd)/.dotfiles" &&
git clone --bare ../remote .dotfiles &&
git submodule update --init
)
'
test_expect_success 'submodule on detached working pointed by core.worktree' '
mkdir home3 &&
(
cd home3 &&
export GIT_DIR="$(pwd)/.dotfiles" &&
git clone --bare ../remote "$GIT_DIR" &&
git config core.bare false &&
git config core.worktree .. &&
git submodule add ../bundle1 .vim/bundle/dupe &&
test_commit "dupe" &&
git push origin master
) &&
(
cd home &&
export GIT_DIR="$(pwd)/.dotfiles" &&
git config core.bare false &&
git config core.worktree .. &&
git pull &&
git submodule update &&
git submodule status &&
test -d .vim/bundle/dupe
)
'
test_done