#!/bin/sh

test_description='pulling into void'

. ./test-lib.sh

modify () {
        sed -e "$1" <"$2" >"$2.x" &&
        mv "$2.x" "$2"
}

test_expect_success setup '
        echo file >file &&
        git add file &&
        git commit -a -m original
'

test_expect_success 'pulling into void' '
        git init cloned &&
        (
                cd cloned &&
                git pull ..
        ) &&
        test -f file &&
        test -f cloned/file &&
        test_cmp file cloned/file
'

test_expect_success 'pulling into void using master:master' '
        git init cloned-uho &&
        (
                cd cloned-uho &&
                git pull .. master:master
        ) &&
        test -f file &&
        test -f cloned-uho/file &&
        test_cmp file cloned-uho/file
'

test_expect_success 'pulling into void does not overwrite untracked files' '
        git init cloned-untracked &&
        (
                cd cloned-untracked &&
                echo untracked >file &&
                test_must_fail git pull .. master &&
                echo untracked >expect &&
                test_cmp expect file
        )
'

test_expect_success 'pulling into void does not overwrite staged files' '
        git init cloned-staged-colliding &&
        (
                cd cloned-staged-colliding &&
                echo "alternate content" >file &&
                git add file &&
                test_must_fail git pull .. master &&
                echo "alternate content" >expect &&
                test_cmp expect file &&
                git cat-file blob :file >file.index &&
                test_cmp expect file.index
        )
'

test_expect_success 'pulling into void does not remove new staged files' '
        git init cloned-staged-new &&
        (
                cd cloned-staged-new &&
                echo "new tracked file" >newfile &&
                git add newfile &&
                git pull .. master &&
                echo "new tracked file" >expect &&
                test_cmp expect newfile &&
                git cat-file blob :newfile >newfile.index &&
                test_cmp expect newfile.index
        )
'

test_expect_success 'pulling into void must not create an octopus' '
        git init cloned-octopus &&
        (
                cd cloned-octopus &&
                test_must_fail git pull .. master master &&
                ! test -f file
        )
'

test_expect_success 'test . as a remote' '

        git branch copy master &&
        git config branch.copy.remote . &&
        git config branch.copy.merge refs/heads/master &&
        echo updated >file &&
        git commit -a -m updated &&
        git checkout copy &&
        test "$(cat file)" = file &&
        git pull &&
        test "$(cat file)" = updated
'

test_expect_success 'the default remote . should not break explicit pull' '
        git checkout -b second master^ &&
        echo modified >file &&
        git commit -a -m modified &&
        git checkout copy &&
        git reset --hard HEAD^ &&
        test "$(cat file)" = file &&
        git pull . second &&
        test "$(cat file)" = modified
'

test_expect_success 'fail if wildcard spec does not match any refs' '
        git checkout -b test copy^ &&
        test_when_finished "git checkout -f copy && git branch -D test" &&
        test "$(cat file)" = file &&
        test_must_fail git pull . "refs/nonexisting1/*:refs/nonexisting2/*" 2>err &&
        test_i18ngrep "no candidates for merging" err &&
        test "$(cat file)" = file
'

test_expect_success 'fail if no branches specified with non-default remote' '
        git remote add test_remote . &&
        test_when_finished "git remote remove test_remote" &&
        git checkout -b test copy^ &&
        test_when_finished "git checkout -f copy && git branch -D test" &&
        test "$(cat file)" = file &&
        test_config branch.test.remote origin &&
        test_must_fail git pull test_remote 2>err &&
        test_i18ngrep "specify a branch on the command line" err &&
        test "$(cat file)" = file
'

test_expect_success 'fail if not on a branch' '
        git remote add origin . &&
        test_when_finished "git remote remove origin" &&
        git checkout HEAD^ &&
        test_when_finished "git checkout -f copy" &&
        test "$(cat file)" = file &&
        test_must_fail git pull 2>err &&
        test_i18ngrep "not currently on a branch" err &&
        test "$(cat file)" = file
'

test_expect_success 'fail if no configuration for current branch' '
        git remote add test_remote . &&
        test_when_finished "git remote remove test_remote" &&
        git checkout -b test copy^ &&
        test_when_finished "git checkout -f copy && git branch -D test" &&
        test_config branch.test.remote test_remote &&
        test "$(cat file)" = file &&
        test_must_fail git pull 2>err &&
        test_i18ngrep "no tracking information" err &&
        test "$(cat file)" = file
'

test_expect_success 'fail if upstream branch does not exist' '
        git checkout -b test copy^ &&
        test_when_finished "git checkout -f copy && git branch -D test" &&
        test_config branch.test.remote . &&
        test_config branch.test.merge refs/heads/nonexisting &&
        test "$(cat file)" = file &&
        test_must_fail git pull 2>err &&
        test_i18ngrep "no such ref was fetched" err &&
        test "$(cat file)" = file
'

test_expect_success 'fail if the index has unresolved entries' '
        git checkout -b third second^ &&
        test_when_finished "git checkout -f copy && git branch -D third" &&
        test "$(cat file)" = file &&
        test_commit modified2 file &&
        test -z "$(git ls-files -u)" &&
        test_must_fail git pull . second &&
        test -n "$(git ls-files -u)" &&
        cp file expected &&
        test_must_fail git pull . second 2>err &&
        test_i18ngrep "Pull is not possible because you have unmerged files" err &&
        test_cmp expected file &&
        git add file &&
        test -z "$(git ls-files -u)" &&
        test_must_fail git pull . second 2>err &&
        test_i18ngrep "You have not concluded your merge" err &&
        test_cmp expected file
'

test_expect_success 'fast-forwards working tree if branch head is updated' '
        git checkout -b third second^ &&
        test_when_finished "git checkout -f copy && git branch -D third" &&
        test "$(cat file)" = file &&
        git pull . second:third 2>err &&
        test_i18ngrep "fetch updated the current branch head" err &&
        test "$(cat file)" = modified &&
        test "$(git rev-parse third)" = "$(git rev-parse second)"
'

test_expect_success 'fast-forward fails with conflicting work tree' '
        git checkout -b third second^ &&
        test_when_finished "git checkout -f copy && git branch -D third" &&
        test "$(cat file)" = file &&
        echo conflict >file &&
        test_must_fail git pull . second:third 2>err &&
        test_i18ngrep "Cannot fast-forward your working tree" err &&
        test "$(cat file)" = conflict &&
        test "$(git rev-parse third)" = "$(git rev-parse second)"
'

test_expect_success '--rebase' '
        git branch to-rebase &&
        echo modified again > file &&
        git commit -m file file &&
        git checkout to-rebase &&
        echo new > file2 &&
        git add file2 &&
        git commit -m "new file" &&
        git tag before-rebase &&
        git pull --rebase . copy &&
        test "$(git rev-parse HEAD^)" = "$(git rev-parse copy)" &&
        test new = "$(git show HEAD:file2)"
'

test_expect_success '--rebase fails with multiple branches' '
        git reset --hard before-rebase &&
        test_must_fail git pull --rebase . copy master 2>err &&
        test "$(git rev-parse HEAD)" = "$(git rev-parse before-rebase)" &&
        test_i18ngrep "Cannot rebase onto multiple branches" err &&
        test modified = "$(git show HEAD:file)"
'

test_expect_success 'pull.rebase' '
        git reset --hard before-rebase &&
        test_config pull.rebase true &&
        git pull . copy &&
        test "$(git rev-parse HEAD^)" = "$(git rev-parse copy)" &&
        test new = "$(git show HEAD:file2)"
'

test_expect_success 'branch.to-rebase.rebase' '
        git reset --hard before-rebase &&
        test_config branch.to-rebase.rebase true &&
        git pull . copy &&
        test "$(git rev-parse HEAD^)" = "$(git rev-parse copy)" &&
        test new = "$(git show HEAD:file2)"
'

test_expect_success 'branch.to-rebase.rebase should override pull.rebase' '
        git reset --hard before-rebase &&
        test_config pull.rebase true &&
        test_config branch.to-rebase.rebase false &&
        git pull . copy &&
        test "$(git rev-parse HEAD^)" != "$(git rev-parse copy)" &&
        test new = "$(git show HEAD:file2)"
'

# add a feature branch, keep-merge, that is merged into master, so the
# test can try preserving the merge commit (or not) with various
# --rebase flags/pull.rebase settings.
test_expect_success 'preserve merge setup' '
        git reset --hard before-rebase &&
        git checkout -b keep-merge second^ &&
        test_commit file3 &&
        git checkout to-rebase &&
        git merge keep-merge &&
        git tag before-preserve-rebase
'

test_expect_success 'pull.rebase=false create a new merge commit' '
        git reset --hard before-preserve-rebase &&
        test_config pull.rebase false &&
        git pull . copy &&
        test "$(git rev-parse HEAD^1)" = "$(git rev-parse before-preserve-rebase)" &&
        test "$(git rev-parse HEAD^2)" = "$(git rev-parse copy)" &&
        test file3 = "$(git show HEAD:file3.t)"
'

test_expect_success 'pull.rebase=true flattens keep-merge' '
        git reset --hard before-preserve-rebase &&
        test_config pull.rebase true &&
        git pull . copy &&
        test "$(git rev-parse HEAD^^)" = "$(git rev-parse copy)" &&
        test file3 = "$(git show HEAD:file3.t)"
'

test_expect_success 'pull.rebase=1 is treated as true and flattens keep-merge' '
        git reset --hard before-preserve-rebase &&
        test_config pull.rebase 1 &&
        git pull . copy &&
        test "$(git rev-parse HEAD^^)" = "$(git rev-parse copy)" &&
        test file3 = "$(git show HEAD:file3.t)"
'

test_expect_success 'pull.rebase=preserve rebases and merges keep-merge' '
        git reset --hard before-preserve-rebase &&
        test_config pull.rebase preserve &&
        git pull . copy &&
        test "$(git rev-parse HEAD^^)" = "$(git rev-parse copy)" &&
        test "$(git rev-parse HEAD^2)" = "$(git rev-parse keep-merge)"
'

test_expect_success 'pull.rebase=invalid fails' '
        git reset --hard before-preserve-rebase &&
        test_config pull.rebase invalid &&
        ! git pull . copy
'

test_expect_success '--rebase=false create a new merge commit' '
        git reset --hard before-preserve-rebase &&
        test_config pull.rebase true &&
        git pull --rebase=false . copy &&
        test "$(git rev-parse HEAD^1)" = "$(git rev-parse before-preserve-rebase)" &&
        test "$(git rev-parse HEAD^2)" = "$(git rev-parse copy)" &&
        test file3 = "$(git show HEAD:file3.t)"
'

test_expect_success '--rebase=true rebases and flattens keep-merge' '
        git reset --hard before-preserve-rebase &&
        test_config pull.rebase preserve &&
        git pull --rebase=true . copy &&
        test "$(git rev-parse HEAD^^)" = "$(git rev-parse copy)" &&
        test file3 = "$(git show HEAD:file3.t)"
'

test_expect_success '--rebase=preserve rebases and merges keep-merge' '
        git reset --hard before-preserve-rebase &&
        test_config pull.rebase true &&
        git pull --rebase=preserve . copy &&
        test "$(git rev-parse HEAD^^)" = "$(git rev-parse copy)" &&
        test "$(git rev-parse HEAD^2)" = "$(git rev-parse keep-merge)"
'

test_expect_success '--rebase=invalid fails' '
        git reset --hard before-preserve-rebase &&
        ! git pull --rebase=invalid . copy
'

test_expect_success '--rebase overrides pull.rebase=preserve and flattens keep-merge' '
        git reset --hard before-preserve-rebase &&
        test_config pull.rebase preserve &&
        git pull --rebase . copy &&
        test "$(git rev-parse HEAD^^)" = "$(git rev-parse copy)" &&
        test file3 = "$(git show HEAD:file3.t)"
'

test_expect_success '--rebase with rebased upstream' '

        git remote add -f me . &&
        git checkout copy &&
        git tag copy-orig &&
        git reset --hard HEAD^ &&
        echo conflicting modification > file &&
        git commit -m conflict file &&
        git checkout to-rebase &&
        echo file > file2 &&
        git commit -m to-rebase file2 &&
        git tag to-rebase-orig &&
        git pull --rebase me copy &&
        test "conflicting modification" = "$(cat file)" &&
        test file = "$(cat file2)"

'

test_expect_success '--rebase with rebased default upstream' '

        git update-ref refs/remotes/me/copy copy-orig &&
        git checkout --track -b to-rebase2 me/copy &&
        git reset --hard to-rebase-orig &&
        git pull --rebase &&
        test "conflicting modification" = "$(cat file)" &&
        test file = "$(cat file2)"

'

test_expect_success 'rebased upstream + fetch + pull --rebase' '

        git update-ref refs/remotes/me/copy copy-orig &&
        git reset --hard to-rebase-orig &&
        git checkout --track -b to-rebase3 me/copy &&
        git reset --hard to-rebase-orig &&
        git fetch &&
        git pull --rebase &&
        test "conflicting modification" = "$(cat file)" &&
        test file = "$(cat file2)"

'

test_expect_success 'pull --rebase dies early with dirty working directory' '

        git checkout to-rebase &&
        git update-ref refs/remotes/me/copy copy^ &&
        COPY="$(git rev-parse --verify me/copy)" &&
        git rebase --onto $COPY copy &&
        test_config branch.to-rebase.remote me &&
        test_config branch.to-rebase.merge refs/heads/copy &&
        test_config branch.to-rebase.rebase true &&
        echo dirty >> file &&
        git add file &&
        test_must_fail git pull &&
        test "$COPY" = "$(git rev-parse --verify me/copy)" &&
        git checkout HEAD -- file &&
        git pull &&
        test "$COPY" != "$(git rev-parse --verify me/copy)"

'

test_expect_success 'pull --rebase works on branch yet to be born' '
        git rev-parse master >expect &&
        mkdir empty_repo &&
        (cd empty_repo &&
         git init &&
         git pull --rebase .. master &&
         git rev-parse HEAD >../actual
        ) &&
        test_cmp expect actual
'

test_expect_success 'pull --rebase fails on unborn branch with staged changes' '
        test_when_finished "rm -rf empty_repo2" &&
        git init empty_repo2 &&
        (
                cd empty_repo2 &&
                echo staged-file >staged-file &&
                git add staged-file &&
                test "$(git ls-files)" = staged-file &&
                test_must_fail git pull --rebase .. master 2>err &&
                test "$(git ls-files)" = staged-file &&
                test "$(git show :staged-file)" = staged-file &&
                test_i18ngrep "unborn branch with changes added to the index" err
        )
'

test_expect_success 'setup for detecting upstreamed changes' '
        mkdir src &&
        (cd src &&
         git init &&
         printf "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n" > stuff &&
         git add stuff &&
         git commit -m "Initial revision"
        ) &&
        git clone src dst &&
        (cd src &&
         modify s/5/43/ stuff &&
         git commit -a -m "5->43" &&
         modify s/6/42/ stuff &&
         git commit -a -m "Make it bigger"
        ) &&
        (cd dst &&
         modify s/5/43/ stuff &&
         git commit -a -m "Independent discovery of 5->43"
        )
'

test_expect_success 'git pull --rebase detects upstreamed changes' '
        (cd dst &&
         git pull --rebase &&
         test -z "$(git ls-files -u)"
        )
'

test_expect_success 'setup for avoiding reapplying old patches' '
        (cd dst &&
         test_might_fail git rebase --abort &&
         git reset --hard origin/master
        ) &&
        git clone --bare src src-replace.git &&
        rm -rf src &&
        mv src-replace.git src &&
        (cd dst &&
         modify s/2/22/ stuff &&
         git commit -a -m "Change 2" &&
         modify s/3/33/ stuff &&
         git commit -a -m "Change 3" &&
         modify s/4/44/ stuff &&
         git commit -a -m "Change 4" &&
         git push &&

         modify s/44/55/ stuff &&
         git commit --amend -a -m "Modified Change 4"
        )
'

test_expect_success 'git pull --rebase does not reapply old patches' '
        (cd dst &&
         test_must_fail git pull --rebase &&
         test 1 = $(find .git/rebase-apply -name "000*" | wc -l)
        )
'

test_expect_success 'git pull --rebase against local branch' '
        git checkout -b copy2 to-rebase-orig &&
        git pull --rebase . to-rebase &&
        test "conflicting modification" = "$(cat file)" &&
        test file = "$(cat file2)"
'

test_done