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git-commit-vandalism/t/t7406-submodule-update.sh
Jens Lehmann 4b7c286ec7 submodule add: Fail when .git/modules/<name> already exists unless forced 
When adding a new submodule it can happen that .git/modules/<name> already
contains a submodule repo, e.g. when a submodule is removed from the work
tree and another submodule is added at the same path. But then the work
tree of the submodule will be populated using the existing repository and
not the one the user provided, which results in an incorrect work tree. On
the other hand the user might reactivate a submodule removed earlier, then
reusing that .git directory is the Right Thing to do.

As git can't decide what is the case, error out and tell the user she
should use either use a different name for the submodule with the "--name"
option or can reuse the .git directory for the newly added submodule by
providing the --force option (which only makes sense when the upstream
matches, so the error message lists all remotes of .git/modules/<name>).

In one test in t7406 the --force option had to be added to "git submodule
add", as that test re-adds a formerly removed submodule.

Reported-by: Jonathan Johnson <me@jondavidjohn.com>
Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-30 16:53:57 -07:00

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#!/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/--merge" 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 &&
git clone super rebasing &&
git clone super merging &&
git clone super none &&
(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"
) &&
(cd super &&
git submodule add ../rebasing rebasing &&
test_tick &&
git commit -m "rebasing"
) &&
(cd super &&
git submodule add ../merging merging &&
test_tick &&
git commit -m "rebasing"
)
(cd super &&
git submodule add ../none none &&
test_tick &&
git commit -m "none"
)
'
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
)
'
apos="'";
test_expect_success 'submodule update does not fetch already present commits' '
(cd submodule &&
echo line3 >> file &&
git add file &&
test_tick &&
git commit -m "upstream line3"
) &&
(cd super/submodule &&
head=$(git rev-parse --verify HEAD) &&
echo "Submodule path ${apos}submodule$apos: checked out $apos$head$apos" > ../../expected &&
git reset --hard HEAD~1
) &&
(cd super &&
git submodule update > ../actual 2> ../actual.err
) &&
test_i18ncmp expected actual &&
! test -s actual.err
'
test_expect_success 'submodule update should fail due to local changes' '
(cd super/submodule &&
git reset --hard HEAD~1 &&
echo "local change" > file
) &&
(cd super &&
(cd submodule &&
compare_head
) &&
test_must_fail git submodule update submodule
)
'
test_expect_success 'submodule update should throw away changes with --force ' '
(cd super &&
(cd submodule &&
compare_head
) &&
git submodule update --force submodule &&
cd submodule &&
! compare_head
)
'
test_expect_success 'submodule update --force forcibly checks out submodules' '
(cd super &&
(cd submodule &&
rm -f file
) &&
git submodule update --force submodule &&
(cd submodule &&
test "$(git status -s file)" = ""
)
)
'
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 --merge staying on master' '
(cd super/submodule &&
git reset --hard HEAD~1
) &&
(cd super &&
(cd submodule &&
compare_head
) &&
git submodule update --merge submodule &&
cd submodule &&
compare_head
)
'
test_expect_success 'submodule update - rebase in .git/config' '
(cd super &&
git config submodule.submodule.update rebase
) &&
(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 - checkout in .git/config but --rebase given' '
(cd super &&
git config submodule.submodule.update checkout
) &&
(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 - merge in .git/config' '
(cd super &&
git config submodule.submodule.update merge
) &&
(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 - checkout in .git/config but --merge given' '
(cd super &&
git config submodule.submodule.update checkout
) &&
(cd super/submodule &&
git reset --hard HEAD~1
) &&
(cd super &&
(cd submodule &&
compare_head
) &&
git submodule update --merge submodule &&
cd submodule &&
compare_head
)
'
test_expect_success 'submodule update - checkout in .git/config' '
(cd super &&
git config submodule.submodule.update checkout
) &&
(cd super/submodule &&
git reset --hard HEAD^
) &&
(cd super &&
(cd submodule &&
compare_head
) &&
git submodule update submodule &&
cd submodule &&
! compare_head
)
'
test_expect_success 'submodule init picks up rebase' '
(cd super &&
git config -f .gitmodules submodule.rebasing.update rebase &&
git submodule init rebasing &&
test "rebase" = "$(git config submodule.rebasing.update)"
)
'
test_expect_success 'submodule init picks up merge' '
(cd super &&
git config -f .gitmodules submodule.merging.update merge &&
git submodule init merging &&
test "merge" = "$(git config submodule.merging.update)"
)
'
test_expect_success 'submodule update --merge - ignores --merge for new submodules' '
(cd super &&
rm -rf submodule &&
git submodule update submodule &&
git status -s submodule >expect &&
rm -rf submodule &&
git submodule update --merge submodule &&
git status -s submodule >actual &&
test_cmp expect actual
)
'
test_expect_success 'submodule update --rebase - ignores --rebase for new submodules' '
(cd super &&
rm -rf submodule &&
git submodule update submodule &&
git status -s submodule >expect &&
rm -rf submodule &&
git submodule update --rebase submodule &&
git status -s submodule >actual &&
test_cmp expect actual
)
'
test_expect_success 'submodule update ignores update=merge config for new submodules' '
(cd super &&
rm -rf submodule &&
git submodule update submodule &&
git status -s submodule >expect &&
rm -rf submodule &&
git config submodule.submodule.update merge &&
git submodule update submodule &&
git status -s submodule >actual &&
git config --unset submodule.submodule.update &&
test_cmp expect actual
)
'
test_expect_success 'submodule update ignores update=rebase config for new submodules' '
(cd super &&
rm -rf submodule &&
git submodule update submodule &&
git status -s submodule >expect &&
rm -rf submodule &&
git config submodule.submodule.update rebase &&
git submodule update submodule &&
git status -s submodule >actual &&
git config --unset submodule.submodule.update &&
test_cmp expect actual
)
'
test_expect_success 'submodule init picks up update=none' '
(cd super &&
git config -f .gitmodules submodule.none.update none &&
git submodule init none &&
test "none" = "$(git config submodule.none.update)"
)
'
test_expect_success 'submodule update - update=none in .git/config' '
(cd super &&
git config submodule.submodule.update none &&
(cd submodule &&
git checkout master &&
compare_head
) &&
git diff --raw | grep " submodule" &&
git submodule update &&
git diff --raw | grep " submodule" &&
(cd submodule &&
compare_head
) &&
git config --unset submodule.submodule.update &&
git submodule update submodule
)
'
test_expect_success 'submodule update - update=none in .git/config but --checkout given' '
(cd super &&
git config submodule.submodule.update none &&
(cd submodule &&
git checkout master &&
compare_head
) &&
git diff --raw | grep " submodule" &&
git submodule update --checkout &&
test_must_fail git diff --raw \| grep " submodule" &&
(cd submodule &&
test_must_fail compare_head
) &&
git config --unset submodule.submodule.update
)
'
test_expect_success 'submodule update --init skips submodule with update=none' '
(cd super &&
git add .gitmodules &&
git commit -m ".gitmodules"
) &&
git clone super cloned &&
(cd cloned &&
git submodule update --init &&
test -e submodule/.git &&
test_must_fail test -e none/.git
)
'
test_expect_success 'submodule update continues after checkout error' '
(cd super &&
git reset --hard HEAD &&
git submodule add ../submodule submodule2 &&
git submodule init &&
git commit -am "new_submodule" &&
(cd submodule2 &&
git rev-parse --verify HEAD >../expect
) &&
(cd submodule &&
test_commit "update_submodule" file
) &&
(cd submodule2 &&
test_commit "update_submodule2" file
) &&
git add submodule &&
git add submodule2 &&
git commit -m "two_new_submodule_commits" &&
(cd submodule &&
echo "" > file
) &&
git checkout HEAD^ &&
test_must_fail git submodule update &&
(cd submodule2 &&
git rev-parse --verify HEAD >../actual
) &&
test_cmp expect actual
)
'
test_expect_success 'submodule update continues after recursive checkout error' '
(cd super &&
git reset --hard HEAD &&
git checkout master &&
git submodule update &&
(cd submodule &&
git submodule add ../submodule subsubmodule &&
git submodule init &&
git commit -m "new_subsubmodule"
) &&
git add submodule &&
git commit -m "update_submodule" &&
(cd submodule &&
(cd subsubmodule &&
test_commit "update_subsubmodule" file
) &&
git add subsubmodule &&
test_commit "update_submodule_again" file &&
(cd subsubmodule &&
test_commit "update_subsubmodule_again" file
) &&
test_commit "update_submodule_again_again" file
) &&
(cd submodule2 &&
git rev-parse --verify HEAD >../expect &&
test_commit "update_submodule2_again" file
) &&
git add submodule &&
git add submodule2 &&
git commit -m "new_commits" &&
git checkout HEAD^ &&
(cd submodule &&
git checkout HEAD^ &&
(cd subsubmodule &&
echo "" > file
)
) &&
test_must_fail git submodule update --recursive &&
(cd submodule2 &&
git rev-parse --verify HEAD >../actual
) &&
test_cmp expect actual
)
'
test_expect_success 'submodule update exit immediately in case of merge conflict' '
(cd super &&
git checkout master &&
git reset --hard HEAD &&
(cd submodule &&
(cd subsubmodule &&
git reset --hard HEAD
)
) &&
git submodule update --recursive &&
(cd submodule &&
test_commit "update_submodule_2" file
) &&
(cd submodule2 &&
test_commit "update_submodule2_2" file
) &&
git add submodule &&
git add submodule2 &&
git commit -m "two_new_submodule_commits" &&
(cd submodule &&
git checkout master &&
test_commit "conflict" file &&
echo "conflict" > file
) &&
git checkout HEAD^ &&
(cd submodule2 &&
git rev-parse --verify HEAD >../expect
) &&
git config submodule.submodule.update merge &&
test_must_fail git submodule update &&
(cd submodule2 &&
git rev-parse --verify HEAD >../actual
) &&
test_cmp expect actual
)
'
test_expect_success 'submodule update exit immediately after recursive rebase error' '
(cd super &&
git checkout master &&
git reset --hard HEAD &&
(cd submodule &&
git reset --hard HEAD &&
git submodule update --recursive
) &&
(cd submodule &&
test_commit "update_submodule_3" file
) &&
(cd submodule2 &&
test_commit "update_submodule2_3" file
) &&
git add submodule &&
git add submodule2 &&
git commit -m "two_new_submodule_commits" &&
(cd submodule &&
git checkout master &&
test_commit "conflict2" file &&
echo "conflict" > file
) &&
git checkout HEAD^ &&
(cd submodule2 &&
git rev-parse --verify HEAD >../expect
) &&
git config submodule.submodule.update rebase &&
test_must_fail git submodule update &&
(cd submodule2 &&
git rev-parse --verify HEAD >../actual
) &&
test_cmp expect actual
)
'
test_expect_success 'add different submodules to the same path' '
(cd super &&
git submodule add ../submodule s1 &&
test_must_fail git submodule add ../merging s1
)
'
test_expect_success 'submodule add places git-dir in superprojects git-dir' '
(cd super &&
mkdir deeper &&
git submodule add ../submodule deeper/submodule &&
(cd deeper/submodule &&
git log > ../../expected
) &&
(cd .git/modules/deeper/submodule &&
git log > ../../../../actual
) &&
test_cmp actual expected
)
'
test_expect_success 'submodule update places git-dir in superprojects git-dir' '
(cd super &&
git commit -m "added submodule"
) &&
git clone super super2 &&
(cd super2 &&
git submodule init deeper/submodule &&
git submodule update &&
(cd deeper/submodule &&
git log > ../../expected
) &&
(cd .git/modules/deeper/submodule &&
git log > ../../../../actual
) &&
test_cmp actual expected
)
'
test_expect_success 'submodule add places git-dir in superprojects git-dir recursive' '
(cd super2 &&
(cd deeper/submodule &&
git submodule add ../submodule subsubmodule &&
(cd subsubmodule &&
git log > ../../../expected
) &&
git commit -m "added subsubmodule" &&
git push
) &&
(cd .git/modules/deeper/submodule/modules/subsubmodule &&
git log > ../../../../../actual
) &&
git add deeper/submodule &&
git commit -m "update submodule" &&
git push &&
test_cmp actual expected
)
'
test_expect_success 'submodule update places git-dir in superprojects git-dir recursive' '
mkdir super_update_r &&
(cd super_update_r &&
git init --bare
) &&
mkdir subsuper_update_r &&
(cd subsuper_update_r &&
git init --bare
) &&
mkdir subsubsuper_update_r &&
(cd subsubsuper_update_r &&
git init --bare
) &&
git clone subsubsuper_update_r subsubsuper_update_r2 &&
(cd subsubsuper_update_r2 &&
test_commit "update_subsubsuper" file &&
git push origin master
) &&
git clone subsuper_update_r subsuper_update_r2 &&
(cd subsuper_update_r2 &&
test_commit "update_subsuper" file &&
git submodule add ../subsubsuper_update_r subsubmodule &&
git commit -am "subsubmodule" &&
git push origin master
) &&
git clone super_update_r super_update_r2 &&
(cd super_update_r2 &&
test_commit "update_super" file &&
git submodule add ../subsuper_update_r submodule &&
git commit -am "submodule" &&
git push origin master
) &&
rm -rf super_update_r2 &&
git clone super_update_r super_update_r2 &&
(cd super_update_r2 &&
git submodule update --init --recursive &&
(cd submodule/subsubmodule &&
git log > ../../expected
) &&
(cd .git/modules/submodule/modules/subsubmodule
git log > ../../../../../actual
)
test_cmp actual expected
)
'
test_expect_success 'submodule add properly re-creates deeper level submodules' '
(cd super &&
git reset --hard master &&
rm -rf deeper/ &&
git submodule add --force ../submodule deeper/submodule
)
'
test_expect_success 'submodule update properly revives a moved submodule' '
(cd super &&
git commit -am "pre move" &&
git status >expect&&
H=$(cd submodule2; git rev-parse HEAD) &&
git rm --cached submodule2 &&
rm -rf submodule2 &&
mkdir -p "moved/sub module" &&
git update-index --add --cacheinfo 160000 $H "moved/sub module" &&
git config -f .gitmodules submodule.submodule2.path "moved/sub module"
git commit -am "post move" &&
git submodule update &&
git status >actual &&
test_cmp expect actual
)
'
test_expect_success SYMLINKS 'submodule update can handle symbolic links in pwd' '
mkdir -p linked/dir &&
ln -s linked/dir linkto &&
(
cd linkto &&
git clone "$TRASH_DIRECTORY"/super_update_r2 super &&
(
cd super &&
git submodule update --init --recursive
)
)
'
test_done
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