#!/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"
        ) &&
        git clone . recursivesuper &&
        ( cd recursivesuper
         git submodule add ../super super
        )
'

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 from subdirectory' '
        (cd super/submodule &&
         git reset --hard HEAD~1
        ) &&
        mkdir super/sub &&
        (cd super/sub &&
         (cd ../submodule &&
          compare_head
         ) &&
         git submodule update ../submodule &&
         cd ../submodule &&
         ! compare_head
        )
'

supersha1=$(git -C super rev-parse HEAD)
mergingsha1=$(git -C super/merging rev-parse HEAD)
nonesha1=$(git -C super/none rev-parse HEAD)
rebasingsha1=$(git -C super/rebasing rev-parse HEAD)
submodulesha1=$(git -C super/submodule rev-parse HEAD)
pwd=$(pwd)

cat <<EOF >expect
Submodule path '../super': checked out '$supersha1'
Submodule 'merging' ($pwd/merging) registered for path '../super/merging'
Submodule 'none' ($pwd/none) registered for path '../super/none'
Submodule 'rebasing' ($pwd/rebasing) registered for path '../super/rebasing'
Submodule 'submodule' ($pwd/submodule) registered for path '../super/submodule'
Submodule path '../super/merging': checked out '$mergingsha1'
Submodule path '../super/none': checked out '$nonesha1'
Submodule path '../super/rebasing': checked out '$rebasingsha1'
Submodule path '../super/submodule': checked out '$submodulesha1'
EOF

test_expect_success 'submodule update --init --recursive from subdirectory' '
        git -C recursivesuper/super reset --hard HEAD^ &&
        (cd recursivesuper &&
         mkdir tmp &&
         cd tmp &&
         git submodule update --init --recursive ../super >../../actual
        ) &&
        test_cmp expect actual
'

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 --remote should fetch upstream changes' '
        (cd submodule &&
         echo line4 >> file &&
         git add file &&
         test_tick &&
         git commit -m "upstream line4"
        ) &&
        (cd super &&
         git submodule update --remote --force submodule &&
         cd submodule &&
         test "$(git log -1 --oneline)" = "$(GIT_DIR=../../submodule/.git git log -1 --oneline)"
        )
'

test_expect_success 'local config should override .gitmodules branch' '
        (cd submodule &&
         git checkout -b test-branch &&
         echo line5 >> file &&
         git add file &&
         test_tick &&
         git commit -m "upstream line5" &&
         git checkout master
        ) &&
        (cd super &&
         git config submodule.submodule.branch test-branch &&
         git submodule update --remote --force submodule &&
         cd submodule &&
         test "$(git log -1 --oneline)" = "$(GIT_DIR=../../submodule/.git git log -1 --oneline test-branch)"
        )
'

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 update - command in .git/config' '
        (cd super &&
         git config submodule.submodule.update "!git checkout"
        ) &&
        (cd super/submodule &&
          git reset --hard HEAD^
        ) &&
        (cd super &&
         (cd submodule &&
          compare_head
         ) &&
         git submodule update submodule &&
         cd submodule &&
         ! compare_head
        )
'

cat << EOF >expect
Execution of 'false $submodulesha1' failed in submodule path 'submodule'
EOF

test_expect_success 'submodule update - command in .git/config catches failure' '
        (cd super &&
         git config submodule.submodule.update "!false"
        ) &&
        (cd super/submodule &&
          git reset --hard $submodulesha1^
        ) &&
        (cd super &&
         test_must_fail git submodule update submodule 2>../actual
        ) &&
        test_cmp actual expect
'

cat << EOF >expect
Execution of 'false $submodulesha1' failed in submodule path '../submodule'
EOF

test_expect_success 'submodule update - command in .git/config catches failure -- subdirectory' '
        (cd super &&
         git config submodule.submodule.update "!false"
        ) &&
        (cd super/submodule &&
          git reset --hard $submodulesha1^
        ) &&
        (cd super &&
         mkdir tmp && cd tmp &&
         test_must_fail git submodule update ../submodule 2>../../actual
        ) &&
        test_cmp actual expect
'

cat << EOF >expect
Execution of 'false $submodulesha1' failed in submodule path '../super/submodule'
Failed to recurse into submodule path '../super'
EOF

test_expect_success 'recursive submodule update - command in .git/config catches failure -- subdirectory' '
        (cd recursivesuper &&
         git submodule update --remote super &&
         git add super &&
         git commit -m "update to latest to have more than one commit in submodules"
        ) &&
        git -C recursivesuper/super config submodule.submodule.update "!false" &&
        git -C recursivesuper/super/submodule reset --hard $submodulesha1^ &&
        (cd recursivesuper &&
         mkdir -p tmp && cd tmp &&
         test_must_fail git submodule update --recursive ../super 2>../../actual
        ) &&
        test_cmp actual expect
'

test_expect_success 'submodule init does not copy command into .git/config' '
        (cd super &&
         H=$(git ls-files -s submodule | cut -d" " -f2) &&
         mkdir submodule1 &&
         git update-index --add --cacheinfo 160000 $H submodule1 &&
         git config -f .gitmodules submodule.submodule1.path submodule1 &&
         git config -f .gitmodules submodule.submodule1.url ../submodule &&
         git config -f .gitmodules submodule.submodule1.update !false &&
         git submodule init submodule1 &&
         echo "none" >expect &&
         git config submodule.submodule1.update >actual &&
         test_cmp expect actual
        )
'

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 origin :
         ) &&
         (cd .git/modules/deeper/submodule/modules/subsubmodule &&
          git log > ../../../../../actual
         ) &&
         git add deeper/submodule &&
         git commit -m "update submodule" &&
         git push origin : &&
         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 >actual &&
         test_i18ngrep "Submodule path .submodule/subsubmodule.: checked out" actual &&
         (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 &&
         H=$(git rev-parse --short HEAD) &&
         git commit -am "pre move" &&
         H2=$(git rev-parse --short HEAD) &&
         git status | sed "s/$H/XXX/" >expect &&
         H=$(cd submodule2; git rev-parse HEAD) &&
         git rm --cached submodule2 &&
         rm -rf submodule2 &&
         mkdir -p "moved/sub module" &&
         git update-index --add --cacheinfo 160000 $H "moved/sub module" &&
         git config -f .gitmodules submodule.submodule2.path "moved/sub module"
         git commit -am "post move" &&
         git submodule update &&
         git status | sed "s/$H2/XXX/" >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_expect_success 'submodule update clone shallow submodule' '
        git clone cloned super3 &&
        pwd=$(pwd) &&
        (cd super3 &&
         sed -e "s#url = ../#url = file://$pwd/#" <.gitmodules >.gitmodules.tmp &&
         mv -f .gitmodules.tmp .gitmodules &&
         git submodule update --init --depth=3
         (cd submodule &&
          test 1 = $(git log --oneline | wc -l)
         )
)
'

test_expect_success 'submodule update --recursive drops module name before recursing' '
        (cd super2 &&
         (cd deeper/submodule/subsubmodule &&
          git checkout HEAD^
         ) &&
         git submodule update --recursive deeper/submodule >actual &&
         test_i18ngrep "Submodule path .deeper/submodule/subsubmodule.: checked out" actual
        )
'
test_done