#!/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 my-topic-branch &&
        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 -b nonlinear my-topic-branch &&
        echo Edit >>B &&
        git add B &&
        git commit -m "Modify B" &&
        git merge side &&
        git checkout -b upstream-merged-nonlinear &&
        git merge master &&
        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 against master twice' '
        git rebase master >out &&
        grep "Current branch my-topic-branch is up to date" out
'

test_expect_success 'rebase against master twice with --force' '
        git rebase --force-rebase master >out &&
        grep "Current branch my-topic-branch is up to date, rebase forced" out
'

test_expect_success 'rebase against master twice from another branch' '
        git checkout my-topic-branch^ &&
        git rebase master my-topic-branch >out &&
        grep "Current branch my-topic-branch is up to date" out
'

test_expect_success 'rebase fast-forward to master' '
        git checkout my-topic-branch^ &&
        git rebase my-topic-branch >out &&
        grep "Fast-forwarded HEAD to my-topic-branch" out
'

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 after merge master' '
        git reset --hard topic &&
        git merge master &&
        git rebase master &&
        ! (git show | grep "^Merge:")
'

test_expect_success 'rebase of history with merges is linearized' '
        git checkout nonlinear &&
        test 4 = $(git rev-list master.. | wc -l) &&
        git rebase master &&
        test 3 = $(git rev-list master.. | wc -l)
'

test_expect_success 'rebase of history with merges after upstream merge is linearized' '
        git checkout upstream-merged-nonlinear &&
        test 5 = $(git rev-list master.. | wc -l) &&
        git rebase master &&
        test 3 = $(git rev-list master.. | wc -l)
'

test_expect_success 'rebase a single mode change' '
        git checkout master &&
        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 'Show verbose error when HEAD could not be detached' '
        >B &&
        test_must_fail git rebase topic 2>output.err >output.out &&
        grep "Untracked working tree file .B. would be overwritten" output.err
'
rm -f B

test_expect_success 'dump usage when upstream arg is missing' '
        git checkout -b usage topic &&
        test_must_fail git rebase 2>error1 &&
        grep "[Uu]sage" error1 &&
        test_must_fail git rebase --abort 2>error2 &&
        grep "No rebase in progress" error2 &&
        test_must_fail git rebase --onto master 2>error3 &&
        grep "[Uu]sage" error3 &&
        ! grep "can.t shift" error3
'

test_expect_success 'rebase -q is quiet' '
        git checkout -b quiet topic &&
        git rebase -q master >output.out 2>&1 &&
        test ! -s 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_done