#!/bin/sh

test_description='blob conversion via gitattributes'

. ./test-lib.sh

cat <<EOF >rot13.sh
#!$SHELL_PATH
tr \
  'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' \
  'nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM'
EOF
chmod +x rot13.sh

test_expect_success setup '
        git config filter.rot13.smudge ./rot13.sh &&
        git config filter.rot13.clean ./rot13.sh &&

        {
            echo "*.t filter=rot13"
            echo "*.i ident"
        } >.gitattributes &&

        {
            echo a b c d e f g h i j k l m
            echo n o p q r s t u v w x y z
            echo '\''$Id$'\''
        } >test &&
        cat test >test.t &&
        cat test >test.o &&
        cat test >test.i &&
        git add test test.t test.i &&
        rm -f test test.t test.i &&
        git checkout -- test test.t test.i
'

script='s/^\$Id: \([0-9a-f]*\) \$/\1/p'

test_expect_success check '

        cmp test.o test &&
        cmp test.o test.t &&

        # ident should be stripped in the repository
        git diff --raw --exit-code :test :test.i &&
        id=$(git rev-parse --verify :test) &&
        embedded=$(sed -ne "$script" test.i) &&
        test "z$id" = "z$embedded" &&

        git cat-file blob :test.t > test.r &&

        ./rot13.sh < test.o > test.t &&
        cmp test.r test.t
'

# If an expanded ident ever gets into the repository, we want to make sure that
# it is collapsed before being expanded again on checkout
test_expect_success expanded_in_repo '
        {
                echo "File with expanded keywords"
                echo "\$Id\$"
                echo "\$Id:\$"
                echo "\$Id: 0000000000000000000000000000000000000000 \$"
                echo "\$Id: NoSpaceAtEnd\$"
                echo "\$Id:NoSpaceAtFront \$"
                echo "\$Id:NoSpaceAtEitherEnd\$"
                echo "\$Id: NoTerminatingSymbol"
                echo "\$Id: Foreign Commit With Spaces \$"
        } >expanded-keywords.0 &&

        {
                cat expanded-keywords.0 &&
                printf "\$Id: NoTerminatingSymbolAtEOF"
        } >expanded-keywords &&
        cat expanded-keywords >expanded-keywords-crlf &&
        git add expanded-keywords expanded-keywords-crlf &&
        git commit -m "File with keywords expanded" &&
        id=$(git rev-parse --verify :expanded-keywords) &&

        {
                echo "File with expanded keywords"
                echo "\$Id: $id \$"
                echo "\$Id: $id \$"
                echo "\$Id: $id \$"
                echo "\$Id: $id \$"
                echo "\$Id: $id \$"
                echo "\$Id: $id \$"
                echo "\$Id: NoTerminatingSymbol"
                echo "\$Id: Foreign Commit With Spaces \$"
        } >expected-output.0 &&
        {
                cat expected-output.0 &&
                printf "\$Id: NoTerminatingSymbolAtEOF"
        } >expected-output &&
        {
                append_cr <expected-output.0 &&
                printf "\$Id: NoTerminatingSymbolAtEOF"
        } >expected-output-crlf &&
        {
                echo "expanded-keywords ident"
                echo "expanded-keywords-crlf ident text eol=crlf"
        } >>.gitattributes &&

        rm -f expanded-keywords expanded-keywords-crlf &&

        git checkout -- expanded-keywords &&
        test_cmp expanded-keywords expected-output &&

        git checkout -- expanded-keywords-crlf &&
        test_cmp expanded-keywords-crlf expected-output-crlf
'

# The use of %f in a filter definition is expanded to the path to
# the filename being smudged or cleaned.  It must be shell escaped.
# First, set up some interesting file names and pet them in
# .gitattributes.
test_expect_success 'filter shell-escaped filenames' '
        cat >argc.sh <<-EOF &&
        #!$SHELL_PATH
        cat >/dev/null
        echo argc: \$# "\$@"
        EOF
        normal=name-no-magic &&
        special="name  with '\''sq'\'' and \$x" &&
        echo some test text >"$normal" &&
        echo some test text >"$special" &&
        git add "$normal" "$special" &&
        git commit -q -m "add files" &&
        echo "name* filter=argc" >.gitattributes &&

        # delete the files and check them out again, using a smudge filter
        # that will count the args and echo the command-line back to us
        git config filter.argc.smudge "sh ./argc.sh %f" &&
        rm "$normal" "$special" &&
        git checkout -- "$normal" "$special" &&

        # make sure argc.sh counted the right number of args
        echo "argc: 1 $normal" >expect &&
        test_cmp expect "$normal" &&
        echo "argc: 1 $special" >expect &&
        test_cmp expect "$special" &&

        # do the same thing, but with more args in the filter expression
        git config filter.argc.smudge "sh ./argc.sh %f --my-extra-arg" &&
        rm "$normal" "$special" &&
        git checkout -- "$normal" "$special" &&

        # make sure argc.sh counted the right number of args
        echo "argc: 2 $normal --my-extra-arg" >expect &&
        test_cmp expect "$normal" &&
        echo "argc: 2 $special --my-extra-arg" >expect &&
        test_cmp expect "$special" &&
        :
'

test_expect_success 'required filter should filter data' '
        git config filter.required.smudge ./rot13.sh &&
        git config filter.required.clean ./rot13.sh &&
        git config filter.required.required true &&

        echo "*.r filter=required" >.gitattributes &&

        cat test.o >test.r &&
        git add test.r &&

        rm -f test.r &&
        git checkout -- test.r &&
        cmp test.o test.r &&

        ./rot13.sh <test.o >expected &&
        git cat-file blob :test.r >actual &&
        cmp expected actual
'

test_expect_success 'required filter smudge failure' '
        git config filter.failsmudge.smudge false &&
        git config filter.failsmudge.clean cat &&
        git config filter.failsmudge.required true &&

        echo "*.fs filter=failsmudge" >.gitattributes &&

        echo test >test.fs &&
        git add test.fs &&
        rm -f test.fs &&
        test_must_fail git checkout -- test.fs
'

test_expect_success 'required filter clean failure' '
        git config filter.failclean.smudge cat &&
        git config filter.failclean.clean false &&
        git config filter.failclean.required true &&

        echo "*.fc filter=failclean" >.gitattributes &&

        echo test >test.fc &&
        test_must_fail git add test.fc
'

test_expect_success 'filtering large input to small output should use little memory' '
        git config filter.devnull.clean "cat >/dev/null" &&
        git config filter.devnull.required true &&
        for i in $(test_seq 1 30); do printf "%1048576d" 1; done >30MB &&
        echo "30MB filter=devnull" >.gitattributes &&
        GIT_MMAP_LIMIT=1m GIT_ALLOC_LIMIT=1m git add 30MB
'

test_expect_success 'filter that does not read is fine' '
        test-genrandom foo $((128 * 1024 + 1)) >big &&
        echo "big filter=epipe" >.gitattributes &&
        git config filter.epipe.clean "echo xyzzy" &&
        git add big &&
        git cat-file blob :big >actual &&
        echo xyzzy >expect &&
        test_cmp expect actual
'

test_expect_success EXPENSIVE 'filter large file' '
        git config filter.largefile.smudge cat &&
        git config filter.largefile.clean cat &&
        for i in $(test_seq 1 2048); do printf "%1048576d" 1; done >2GB &&
        echo "2GB filter=largefile" >.gitattributes &&
        git add 2GB 2>err &&
        ! test -s err &&
        rm -f 2GB &&
        git checkout -- 2GB 2>err &&
        ! test -s err
'

test_done