#!/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 --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 --max-count=1 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 --max-count=1 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 --max-count=1 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 --max-count=1 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 --max-count=1 HEAD > ../expect
         ) &&
         git config submodule.submodule.update merge &&
         test_must_fail git submodule update &&
         (cd submodule2 &&
          git rev-parse --max-count=1 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 --max-count=1 HEAD > ../expect
         ) &&
         git config submodule.submodule.update rebase &&
         test_must_fail git submodule update &&
         (cd submodule2 &&
          git rev-parse --max-count=1 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 ../submodule deeper/submodule
        )
'

test_done