#!/bin/sh
#
# Copyright (c) 2005 Amos Waterland
#

test_description='git rebase assorted tests

This test runs git rebase and checks that the author information is not lost
among other things.
'
. ./test-lib.sh

GIT_AUTHOR_NAME=author@name
GIT_AUTHOR_EMAIL=bogus@email@address
export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL

test_expect_success 'prepare repository with topic branches' '
        git config core.logAllRefUpdates true &&
        echo First >A &&
        git update-index --add A &&
        git commit -m "Add A." &&
        git checkout -b force-3way &&
        echo Dummy >Y &&
        git update-index --add Y &&
        git commit -m "Add Y." &&
        git checkout -b filemove &&
        git reset --soft master &&
        mkdir D &&
        git mv A D/A &&
        git commit -m "Move A." &&
        git checkout -b my-topic-branch master &&
        echo Second >B &&
        git update-index --add B &&
        git commit -m "Add B." &&
        git checkout -f master &&
        echo Third >>A &&
        git update-index A &&
        git commit -m "Modify A." &&
        git checkout -b side my-topic-branch &&
        echo Side >>C &&
        git add C &&
        git commit -m "Add C" &&
        git checkout -f my-topic-branch &&
        git tag topic
'

test_expect_success 'rebase on dirty worktree' '
        echo dirty >>A &&
        test_must_fail git rebase master
'

test_expect_success 'rebase on dirty cache' '
        git add A &&
        test_must_fail git rebase master
'

test_expect_success 'rebase against master' '
        git reset --hard HEAD &&
        git rebase master
'

test_expect_success 'rebase sets ORIG_HEAD to pre-rebase state' '
        git checkout -b orig-head topic &&
        pre="$(git rev-parse --verify HEAD)" &&
        git rebase master &&
        test_cmp_rev "$pre" ORIG_HEAD &&
        ! test_cmp_rev "$pre" HEAD
'

test_expect_success 'rebase, with <onto> and <upstream> specified as :/quuxery' '
        test_when_finished "git branch -D torebase" &&
        git checkout -b torebase my-topic-branch^ &&
        upstream=$(git rev-parse ":/Add B") &&
        onto=$(git rev-parse ":/Add A") &&
        git rebase --onto $onto $upstream &&
        git reset --hard my-topic-branch^ &&
        git rebase --onto ":/Add A" ":/Add B" &&
        git checkout my-topic-branch
'

test_expect_success 'the rebase operation should not have destroyed author information' '
        ! (git log | grep "Author:" | grep "<>")
'

test_expect_success 'the rebase operation should not have destroyed author information (2)' "
        git log -1 |
        grep 'Author: $GIT_AUTHOR_NAME <$GIT_AUTHOR_EMAIL>'
"

test_expect_success 'HEAD was detached during rebase' '
        test $(git rev-parse HEAD@{1}) != $(git rev-parse my-topic-branch@{1})
'

test_expect_success 'rebase from ambiguous branch name' '
        git checkout -b topic side &&
        git rebase master
'

test_expect_success 'rebase off of the previous branch using "-"' '
        git checkout master &&
        git checkout HEAD^ &&
        git rebase @{-1} >expect.messages &&
        git merge-base master HEAD >expect.forkpoint &&

        git checkout master &&
        git checkout HEAD^ &&
        git rebase - >actual.messages &&
        git merge-base master HEAD >actual.forkpoint &&

        test_cmp expect.forkpoint actual.forkpoint &&
        # the next one is dubious---we may want to say "-",
        # instead of @{-1}, in the message
        test_i18ncmp expect.messages actual.messages
'

test_expect_success 'rebase a single mode change' '
        git checkout master &&
        git branch -D topic &&
        echo 1 >X &&
        git add X &&
        test_tick &&
        git commit -m prepare &&
        git checkout -b modechange HEAD^ &&
        echo 1 >X &&
        git add X &&
        test_chmod +x A &&
        test_tick &&
        git commit -m modechange &&
        GIT_TRACE=1 git rebase master
'

test_expect_success 'rebase is not broken by diff.renames' '
        test_config diff.renames copies &&
        git checkout filemove &&
        GIT_TRACE=1 git rebase force-3way
'

test_expect_success 'setup: recover' '
        test_might_fail git rebase --abort &&
        git reset --hard &&
        git checkout modechange
'

test_expect_success 'Show verbose error when HEAD could not be detached' '
        >B &&
        test_must_fail git rebase topic 2>output.err >output.out &&
        test_i18ngrep "The following untracked working tree files would be overwritten by checkout:" output.err &&
        test_i18ngrep B output.err
'
rm -f B

test_expect_success 'fail when upstream arg is missing and not on branch' '
        git checkout topic &&
        test_must_fail git rebase
'

test_expect_success 'fail when upstream arg is missing and not configured' '
        git checkout -b no-config topic &&
        test_must_fail git rebase
'

test_expect_success 'default to common base in @{upstream}s reflog if no upstream arg' '
        git checkout -b default-base master &&
        git checkout -b default topic &&
        git config branch.default.remote . &&
        git config branch.default.merge refs/heads/default-base &&
        git rebase &&
        git rev-parse --verify default-base >expect &&
        git rev-parse default~1 >actual &&
        test_cmp expect actual &&
        git checkout default-base &&
        git reset --hard HEAD^ &&
        git checkout default &&
        git rebase &&
        git rev-parse --verify default-base >expect &&
        git rev-parse default~1 >actual &&
        test_cmp expect actual
'

test_expect_success 'cherry-picked commits and fork-point work together' '
        git checkout default-base &&
        echo Amended >A &&
        git commit -a --no-edit --amend &&
        test_commit B B &&
        test_commit new_B B "New B" &&
        test_commit C C &&
        git checkout default &&
        git reset --hard default-base@{4} &&
        test_commit D D &&
        git cherry-pick -2 default-base^ &&
        test_commit final_B B "Final B" &&
        git rebase &&
        echo Amended >expect &&
        test_cmp expect A &&
        echo "Final B" >expect &&
        test_cmp expect B &&
        echo C >expect &&
        test_cmp expect C &&
        echo D >expect &&
        test_cmp expect D
'

test_expect_success 'rebase -q is quiet' '
        git checkout -b quiet topic &&
        git rebase -q master >output.out 2>&1 &&
        test_must_be_empty output.out
'

test_expect_success 'Rebase a commit that sprinkles CRs in' '
        (
                echo "One" &&
                echo "TwoQ" &&
                echo "Three" &&
                echo "FQur" &&
                echo "Five"
        ) | q_to_cr >CR &&
        git add CR &&
        test_tick &&
        git commit -a -m "A file with a line with CR" &&
        git tag file-with-cr &&
        git checkout HEAD^0 &&
        git rebase --onto HEAD^^ HEAD^ &&
        git diff --exit-code file-with-cr:CR HEAD:CR
'

test_expect_success 'rebase can copy notes' '
        git config notes.rewrite.rebase true &&
        git config notes.rewriteRef "refs/notes/*" &&
        test_commit n1 &&
        test_commit n2 &&
        test_commit n3 &&
        git notes add -m"a note" n3 &&
        git rebase --onto n1 n2 &&
        test "a note" = "$(git notes show HEAD)"
'

test_expect_success 'rebase -m can copy notes' '
        git reset --hard n3 &&
        git rebase -m --onto n1 n2 &&
        test "a note" = "$(git notes show HEAD)"
'

test_expect_success 'rebase commit with an ancient timestamp' '
        git reset --hard &&

        >old.one && git add old.one && test_tick &&
        git commit --date="@12345 +0400" -m "Old one" &&
        >old.two && git add old.two && test_tick &&
        git commit --date="@23456 +0500" -m "Old two" &&
        >old.three && git add old.three && test_tick &&
        git commit --date="@34567 +0600" -m "Old three" &&

        git cat-file commit HEAD^^ >actual &&
        grep "author .* 12345 +0400$" actual &&
        git cat-file commit HEAD^ >actual &&
        grep "author .* 23456 +0500$" actual &&
        git cat-file commit HEAD >actual &&
        grep "author .* 34567 +0600$" actual &&

        git rebase --onto HEAD^^ HEAD^ &&

        git cat-file commit HEAD >actual &&
        grep "author .* 34567 +0600$" actual
'

test_expect_success 'rebase with "From " line in commit message' '
        git checkout -b preserve-from master~1 &&
        cat >From_.msg <<EOF &&
Somebody embedded an mbox in a commit message

This is from so-and-so:

From a@b Mon Sep 17 00:00:00 2001
From: John Doe <nobody@example.com>
Date: Sat, 11 Nov 2017 00:00:00 +0000
Subject: not this message

something
EOF
        >From_ &&
        git add From_ &&
        git commit -F From_.msg &&
        git rebase master &&
        git log -1 --pretty=format:%B >out &&
        test_cmp From_.msg out
'

test_expect_success 'rebase--am.sh and --show-current-patch' '
        test_create_repo conflict-apply &&
        (
                cd conflict-apply &&
                test_commit init &&
                echo one >>init.t &&
                git commit -a -m one &&
                echo two >>init.t &&
                git commit -a -m two &&
                git tag two &&
                test_must_fail git rebase --onto init HEAD^ &&
                GIT_TRACE=1 git rebase --show-current-patch >/dev/null 2>stderr &&
                grep "show.*$(git rev-parse two)" stderr
        )
'

test_expect_success 'rebase--merge.sh and --show-current-patch' '
        test_create_repo conflict-merge &&
        (
                cd conflict-merge &&
                test_commit init &&
                echo one >>init.t &&
                git commit -a -m one &&
                echo two >>init.t &&
                git commit -a -m two &&
                git tag two &&
                test_must_fail git rebase --merge --onto init HEAD^ &&
                git rebase --show-current-patch >actual.patch &&
                GIT_TRACE=1 git rebase --show-current-patch >/dev/null 2>stderr &&
                grep "show.*REBASE_HEAD" stderr &&
                test "$(git rev-parse REBASE_HEAD)" = "$(git rev-parse two)"
        )
'

test_done