#!/bin/sh

test_description='git-filter-branch'
. ./test-lib.sh

make_commit () {
        lower=$(echo $1 | tr A-Z a-z)
        echo $lower > $lower
        git add $lower
        test_tick
        git commit -m $1
        git tag $1
}

test_expect_success 'setup' '
        make_commit A
        make_commit B
        git checkout -b branch B
        make_commit D
        make_commit E
        git checkout master
        make_commit C
        git checkout branch
        git merge C
        git tag F
        make_commit G
        make_commit H
'

H=$(git rev-parse H)

test_expect_success 'rewrite identically' '
        git-filter-branch branch
'
test_expect_success 'result is really identical' '
        test $H = $(git rev-parse HEAD)
'

test_expect_success 'rewrite, renaming a specific file' '
        git-filter-branch -f --tree-filter "mv d doh || :" HEAD
'

test_expect_success 'test that the file was renamed' '
        test d = $(git show HEAD:doh)
'

git tag oldD HEAD~4
test_expect_success 'rewrite one branch, keeping a side branch' '
        git branch modD oldD &&
        git-filter-branch -f --tree-filter "mv b boh || :" D..modD
'

test_expect_success 'common ancestor is still common (unchanged)' '
        test "$(git merge-base modD D)" = "$(git rev-parse B)"
'

test_expect_success 'filter subdirectory only' '
        mkdir subdir &&
        touch subdir/new &&
        git add subdir/new &&
        test_tick &&
        git commit -m "subdir" &&
        echo H > a &&
        test_tick &&
        git commit -m "not subdir" a &&
        echo A > subdir/new &&
        test_tick &&
        git commit -m "again subdir" subdir/new &&
        git rm a &&
        test_tick &&
        git commit -m "again not subdir" &&
        git branch sub &&
        git-filter-branch -f --subdirectory-filter subdir refs/heads/sub
'

test_expect_success 'subdirectory filter result looks okay' '
        test 2 = $(git rev-list sub | wc -l) &&
        git show sub:new &&
        ! git show sub:subdir
'

test_expect_success 'setup and filter history that requires --full-history' '
        git checkout master &&
        mkdir subdir &&
        echo A > subdir/new &&
        git add subdir/new &&
        test_tick &&
        git commit -m "subdir on master" subdir/new &&
        git rm a &&
        test_tick &&
        git commit -m "again subdir on master" &&
        git merge branch &&
        git branch sub-master &&
        git-filter-branch -f --subdirectory-filter subdir sub-master
'

test_expect_success 'subdirectory filter result looks okay' '
        test 3 = $(git rev-list -1 --parents sub-master | wc -w) &&
        git show sub-master^:new &&
        git show sub-master^2:new &&
        ! git show sub:subdir
'

test_expect_success 'use index-filter to move into a subdirectory' '
        git branch directorymoved &&
        git-filter-branch -f --index-filter \
                 "git ls-files -s | sed \"s-\\t-&newsubdir/-\" |
                  GIT_INDEX_FILE=\$GIT_INDEX_FILE.new \
                        git update-index --index-info &&
                  mv \$GIT_INDEX_FILE.new \$GIT_INDEX_FILE" directorymoved &&
        test -z "$(git diff HEAD directorymoved:newsubdir)"'

test_expect_success 'stops when msg filter fails' '
        old=$(git rev-parse HEAD) &&
        ! git-filter-branch -f --msg-filter false &&
        test $old = $(git rev-parse HEAD) &&
        rm -rf .git-rewrite
'

test_expect_success 'author information is preserved' '
        : > i &&
        git add i &&
        test_tick &&
        GIT_AUTHOR_NAME="B V Uips" git commit -m bvuips &&
        git branch preserved-author &&
        git-filter-branch -f --msg-filter "cat; \
                        test \$GIT_COMMIT != $(git rev-parse master) || \
                        echo Hallo" \
                preserved-author &&
        test 1 = $(git rev-list --author="B V Uips" preserved-author | wc -l)
'

test_expect_success "remove a certain author's commits" '
        echo i > i &&
        test_tick &&
        git commit -m i i &&
        git branch removed-author &&
        git-filter-branch -f --commit-filter "\
                if [ \"\$GIT_AUTHOR_NAME\" = \"B V Uips\" ];\
                then\
                        shift;\
                        while [ -n \"\$1\" ];\
                        do\
                                shift;\
                                echo \"\$1\";\
                                shift;\
                        done;\
                else\
                        git commit-tree \"\$@\";\
                fi" removed-author &&
        cnt1=$(git rev-list master | wc -l) &&
        cnt2=$(git rev-list removed-author | wc -l) &&
        test $cnt1 -eq $(($cnt2 + 1)) &&
        test 0 = $(git rev-list --author="B V Uips" removed-author | wc -l)
'

test_expect_success 'barf on invalid name' '
        ! git filter-branch -f master xy-problem &&
        ! git filter-branch -f HEAD^
'

test_expect_success '"map" works in commit filter' '
        git filter-branch -f --commit-filter "\
                parent=\$(git rev-parse \$GIT_COMMIT^) &&
                mapped=\$(map \$parent) &&
                actual=\$(echo \"\$@\" | sed \"s/^.*-p //\") &&
                test \$mapped = \$actual &&
                git commit-tree \"\$@\";" master~2..master &&
        git rev-parse --verify master
'

test_done