#!/bin/sh

test_description=check-ignore

. ./test-lib.sh

init_vars () {
        global_excludes="$(pwd)/global-excludes"
}

enable_global_excludes () {
        init_vars &&
        git config core.excludesfile "$global_excludes"
}

expect_in () {
        dest="$HOME/expected-$1" text="$2"
        if test -z "$text"
        then
                >"$dest" # avoid newline
        else
                echo "$text" >"$dest"
        fi
}

expect () {
        expect_in stdout "$1"
}

expect_from_stdin () {
        cat >"$HOME/expected-stdout"
}

test_stderr () {
        expected="$1"
        expect_in stderr "$1" &&
        test_cmp "$HOME/expected-stderr" "$HOME/stderr"
}

stderr_contains () {
        regexp="$1"
        if grep "$regexp" "$HOME/stderr"
        then
                return 0
        else
                echo "didn't find /$regexp/ in $HOME/stderr"
                cat "$HOME/stderr"
                return 1
        fi
}

stderr_empty_on_success () {
        expect_code="$1"
        if test $expect_code = 0
        then
                test_stderr ""
        else
                # If we expect failure then stderr might or might not be empty
                # due to --quiet - the caller can check its contents
                return 0
        fi
}

test_check_ignore () {
        args="$1" expect_code="${2:-0}" global_args="$3"

        init_vars &&
        rm -f "$HOME/stdout" "$HOME/stderr" "$HOME/cmd" &&
        echo git $global_args check-ignore $quiet_opt $verbose_opt $non_matching_opt $args \
                >"$HOME/cmd" &&
        echo "$expect_code" >"$HOME/expected-exit-code" &&
        test_expect_code "$expect_code" \
                git $global_args check-ignore $quiet_opt $verbose_opt $non_matching_opt $args \
                >"$HOME/stdout" 2>"$HOME/stderr" &&
        test_cmp "$HOME/expected-stdout" "$HOME/stdout" &&
        stderr_empty_on_success "$expect_code"
}

# Runs the same code with 4 different levels of output verbosity:
#
#   1. with -q / --quiet
#   2. with default verbosity
#   3. with -v / --verbose
#   4. with -v / --verbose, *and* -n / --non-matching
#
# expecting success each time.  Takes advantage of the fact that
# check-ignore --verbose output is the same as normal output except
# for the extra first column.
#
# Arguments:
#   - (optional) prereqs for this test, e.g. 'SYMLINKS'
#   - test name
#   - output to expect from the fourth verbosity mode (the output
#     from the other verbosity modes is automatically inferred
#     from this value)
#   - code to run (should invoke test_check_ignore)
test_expect_success_multi () {
        prereq=
        if test $# -eq 4
        then
                prereq=$1
                shift
        fi
        testname="$1" expect_all="$2" code="$3"

        expect_verbose=$( echo "$expect_all" | grep -v '^::     ' )
        expect=$( echo "$expect_verbose" | sed -e 's/.* //' )

        test_expect_success $prereq "$testname" '
                expect "$expect" &&
                eval "$code"
        '

        # --quiet is only valid when a single pattern is passed
        if test $( echo "$expect_all" | wc -l ) = 1
        then
                for quiet_opt in '-q' '--quiet'
                do
                        test_expect_success $prereq "$testname${quiet_opt:+ with $quiet_opt}" "
                        expect '' &&
                        $code
                "
                done
                quiet_opt=
        fi

        for verbose_opt in '-v' '--verbose'
        do
                for non_matching_opt in '' ' -n' ' --non-matching'
                do
                        if test -n "$non_matching_opt"
                        then
                                my_expect="$expect_all"
                        else
                                my_expect="$expect_verbose"
                        fi

                        test_code="
                                expect '$my_expect' &&
                                $code
                        "
                        opts="$verbose_opt$non_matching_opt"
                        test_expect_success $prereq "$testname${opts:+ with $opts}" "$test_code"
                done
        done
        verbose_opt=
        non_matching_opt=
}

test_expect_success 'setup' '
        init_vars &&
        mkdir -p a/b/ignored-dir a/submodule b &&
        if test_have_prereq SYMLINKS
        then
                ln -s b a/symlink
        fi &&
        (
                cd a/submodule &&
                git init &&
                echo a >a &&
                git add a &&
                git commit -m"commit in submodule"
        ) &&
        git add a/submodule &&
        cat <<-\EOF >.gitignore &&
                one
                ignored-*
                top-level-dir/
        EOF
        for dir in . a
        do
                : >$dir/not-ignored &&
                : >$dir/ignored-and-untracked &&
                : >$dir/ignored-but-in-index
        done &&
        git add -f ignored-but-in-index a/ignored-but-in-index &&
        cat <<-\EOF >a/.gitignore &&
                two*
                *three
        EOF
        cat <<-\EOF >a/b/.gitignore &&
                four
                five
                # this comment should affect the line numbers
                six
                ignored-dir/
                # and so should this blank line:

                !on*
                !two
        EOF
        echo "seven" >a/b/ignored-dir/.gitignore &&
        test -n "$HOME" &&
        cat <<-\EOF >"$global_excludes" &&
                globalone
                !globaltwo
                globalthree
        EOF
        cat <<-\EOF >>.git/info/exclude
                per-repo
        EOF
'

############################################################################
#
# test invalid inputs

test_expect_success_multi '. corner-case' '::   .' '
        test_check_ignore . 1
'

test_expect_success_multi 'empty command line' '' '
        test_check_ignore "" 128 &&
        stderr_contains "fatal: no path specified"
'

test_expect_success_multi '--stdin with empty STDIN' '' '
        test_check_ignore "--stdin" 1 </dev/null &&
        test_stderr ""
'

test_expect_success '-q with multiple args' '
        expect "" &&
        test_check_ignore "-q one two" 128 &&
        stderr_contains "fatal: --quiet is only valid with a single pathname"
'

test_expect_success '--quiet with multiple args' '
        expect "" &&
        test_check_ignore "--quiet one two" 128 &&
        stderr_contains "fatal: --quiet is only valid with a single pathname"
'

for verbose_opt in '-v' '--verbose'
do
        for quiet_opt in '-q' '--quiet'
        do
                test_expect_success "$quiet_opt $verbose_opt" "
                        expect '' &&
                        test_check_ignore '$quiet_opt $verbose_opt foo' 128 &&
                        stderr_contains 'fatal: cannot have both --quiet and --verbose'
                "
        done
done

test_expect_success '--quiet with multiple args' '
        expect "" &&
        test_check_ignore "--quiet one two" 128 &&
        stderr_contains "fatal: --quiet is only valid with a single pathname"
'

test_expect_success_multi 'erroneous use of --' '' '
        test_check_ignore "--" 128 &&
        stderr_contains "fatal: no path specified"
'

test_expect_success_multi '--stdin with superfluous arg' '' '
        test_check_ignore "--stdin foo" 128 &&
        stderr_contains "fatal: cannot specify pathnames with --stdin"
'

test_expect_success_multi '--stdin -z with superfluous arg' '' '
        test_check_ignore "--stdin -z foo" 128 &&
        stderr_contains "fatal: cannot specify pathnames with --stdin"
'

test_expect_success_multi '-z without --stdin' '' '
        test_check_ignore "-z" 128 &&
        stderr_contains "fatal: -z only makes sense with --stdin"
'

test_expect_success_multi '-z without --stdin and superfluous arg' '' '
        test_check_ignore "-z foo" 128 &&
        stderr_contains "fatal: -z only makes sense with --stdin"
'

test_expect_success_multi 'needs work tree' '' '
        (
                cd .git &&
                test_check_ignore "foo" 128
        ) &&
        stderr_contains "fatal: This operation must be run in a work tree"
'

############################################################################
#
# test standard ignores

# First make sure that the presence of a file in the working tree
# does not impact results, but that the presence of a file in the
# index does.

for subdir in '' 'a/'
do
        if test -z "$subdir"
        then
                where="at top-level"
        else
                where="in subdir $subdir"
        fi

        test_expect_success_multi "non-existent file $where not ignored" \
                "::     ${subdir}non-existent" \
                "test_check_ignore '${subdir}non-existent' 1"

        test_expect_success_multi "non-existent file $where ignored" \
                ".gitignore:1:one       ${subdir}one" \
                "test_check_ignore '${subdir}one'"

        test_expect_success_multi "existing untracked file $where not ignored" \
                "::     ${subdir}not-ignored" \
                "test_check_ignore '${subdir}not-ignored' 1"

        test_expect_success_multi "existing tracked file $where not ignored" \
                "::     ${subdir}ignored-but-in-index" \
                "test_check_ignore '${subdir}ignored-but-in-index' 1"

        test_expect_success_multi "existing untracked file $where ignored" \
                ".gitignore:2:ignored-* ${subdir}ignored-and-untracked" \
                "test_check_ignore '${subdir}ignored-and-untracked'"

        test_expect_success_multi "mix of file types $where" \
"::     ${subdir}non-existent
.gitignore:1:one        ${subdir}one
::      ${subdir}not-ignored
::      ${subdir}ignored-but-in-index
.gitignore:2:ignored-*  ${subdir}ignored-and-untracked" \
                "test_check_ignore '
                        ${subdir}non-existent
                        ${subdir}one
                        ${subdir}not-ignored
                        ${subdir}ignored-but-in-index
                        ${subdir}ignored-and-untracked'
                "
done

# Having established the above, from now on we mostly test against
# files which do not exist in the working tree or index.

test_expect_success 'sub-directory local ignore' '
        expect "a/3-three" &&
        test_check_ignore "a/3-three a/three-not-this-one"
'

test_expect_success 'sub-directory local ignore with --verbose'  '
        expect "a/.gitignore:2:*three   a/3-three" &&
        test_check_ignore "--verbose a/3-three a/three-not-this-one"
'

test_expect_success 'local ignore inside a sub-directory' '
        expect "3-three" &&
        (
                cd a &&
                test_check_ignore "3-three three-not-this-one"
        )
'
test_expect_success 'local ignore inside a sub-directory with --verbose' '
        expect "a/.gitignore:2:*three   3-three" &&
        (
                cd a &&
                test_check_ignore "--verbose 3-three three-not-this-one"
        )
'

test_expect_success_multi 'nested include' \
        'a/b/.gitignore:8:!on*  a/b/one' '
        test_check_ignore "a/b/one"
'

############################################################################
#
# test ignored sub-directories

test_expect_success_multi 'ignored sub-directory' \
        'a/b/.gitignore:5:ignored-dir/  a/b/ignored-dir' '
        test_check_ignore "a/b/ignored-dir"
'

test_expect_success 'multiple files inside ignored sub-directory' '
        expect_from_stdin <<-\EOF &&
                a/b/ignored-dir/foo
                a/b/ignored-dir/twoooo
                a/b/ignored-dir/seven
        EOF
        test_check_ignore "a/b/ignored-dir/foo a/b/ignored-dir/twoooo a/b/ignored-dir/seven"
'

test_expect_success 'multiple files inside ignored sub-directory with -v' '
        expect_from_stdin <<-\EOF &&
                a/b/.gitignore:5:ignored-dir/   a/b/ignored-dir/foo
                a/b/.gitignore:5:ignored-dir/   a/b/ignored-dir/twoooo
                a/b/.gitignore:5:ignored-dir/   a/b/ignored-dir/seven
        EOF
        test_check_ignore "-v a/b/ignored-dir/foo a/b/ignored-dir/twoooo a/b/ignored-dir/seven"
'

test_expect_success 'cd to ignored sub-directory' '
        expect_from_stdin <<-\EOF &&
                foo
                twoooo
                ../one
                seven
                ../../one
        EOF
        (
                cd a/b/ignored-dir &&
                test_check_ignore "foo twoooo ../one seven ../../one"
        )
'

test_expect_success 'cd to ignored sub-directory with -v' '
        expect_from_stdin <<-\EOF &&
                a/b/.gitignore:5:ignored-dir/   foo
                a/b/.gitignore:5:ignored-dir/   twoooo
                a/b/.gitignore:8:!on*   ../one
                a/b/.gitignore:5:ignored-dir/   seven
                .gitignore:1:one        ../../one
        EOF
        (
                cd a/b/ignored-dir &&
                test_check_ignore "-v foo twoooo ../one seven ../../one"
        )
'

############################################################################
#
# test handling of symlinks

test_expect_success_multi SYMLINKS 'symlink' '::        a/symlink' '
        test_check_ignore "a/symlink" 1
'

test_expect_success_multi SYMLINKS 'beyond a symlink' '' '
        test_check_ignore "a/symlink/foo" 128 &&
        test_stderr "fatal: '\''a/symlink/foo'\'' is beyond a symbolic link"
'

test_expect_success_multi SYMLINKS 'beyond a symlink from subdirectory' '' '
        (
                cd a &&
                test_check_ignore "symlink/foo" 128
        ) &&
        test_stderr "fatal: '\''symlink/foo'\'' is beyond a symbolic link"
'

############################################################################
#
# test handling of submodules

test_expect_success_multi 'submodule' '' '
        test_check_ignore "a/submodule/one" 128 &&
        test_stderr "fatal: Path '\''a/submodule/one'\'' is in submodule '\''a/submodule'\''"
'

test_expect_success_multi 'submodule from subdirectory' '' '
        (
                cd a &&
                test_check_ignore "submodule/one" 128
        ) &&
        test_stderr "fatal: Path '\''a/submodule/one'\'' is in submodule '\''a/submodule'\''"
'

############################################################################
#
# test handling of global ignore files

test_expect_success 'global ignore not yet enabled' '
        expect_from_stdin <<-\EOF &&
                .git/info/exclude:7:per-repo    per-repo
                a/.gitignore:2:*three   a/globalthree
                .git/info/exclude:7:per-repo    a/per-repo
        EOF
        test_check_ignore "-v globalone per-repo a/globalthree a/per-repo not-ignored a/globaltwo"
'

test_expect_success 'global ignore' '
        enable_global_excludes &&
        expect_from_stdin <<-\EOF &&
                globalone
                per-repo
                globalthree
                a/globalthree
                a/per-repo
                globaltwo
        EOF
        test_check_ignore "globalone per-repo globalthree a/globalthree a/per-repo not-ignored globaltwo"
'

test_expect_success 'global ignore with -v' '
        enable_global_excludes &&
        expect_from_stdin <<-EOF &&
                $global_excludes:1:globalone    globalone
                .git/info/exclude:7:per-repo    per-repo
                $global_excludes:3:globalthree  globalthree
                a/.gitignore:2:*three   a/globalthree
                .git/info/exclude:7:per-repo    a/per-repo
                $global_excludes:2:!globaltwo   globaltwo
        EOF
        test_check_ignore "-v globalone per-repo globalthree a/globalthree a/per-repo not-ignored globaltwo"
'

############################################################################
#
# test --stdin

cat <<-\EOF >stdin
        one
        not-ignored
        a/one
        a/not-ignored
        a/b/on
        a/b/one
        a/b/one one
        "a/b/one two"
        "a/b/one\"three"
        a/b/not-ignored
        a/b/two
        a/b/twooo
        globaltwo
        a/globaltwo
        a/b/globaltwo
        b/globaltwo
EOF
cat <<-\EOF >expected-default
        one
        a/one
        a/b/on
        a/b/one
        a/b/one one
        a/b/one two
        "a/b/one\"three"
        a/b/two
        a/b/twooo
        globaltwo
        a/globaltwo
        a/b/globaltwo
        b/globaltwo
EOF
cat <<-EOF >expected-verbose
        .gitignore:1:one        one
        .gitignore:1:one        a/one
        a/b/.gitignore:8:!on*   a/b/on
        a/b/.gitignore:8:!on*   a/b/one
        a/b/.gitignore:8:!on*   a/b/one one
        a/b/.gitignore:8:!on*   a/b/one two
        a/b/.gitignore:8:!on*   "a/b/one\"three"
        a/b/.gitignore:9:!two   a/b/two
        a/.gitignore:1:two*     a/b/twooo
        $global_excludes:2:!globaltwo   globaltwo
        $global_excludes:2:!globaltwo   a/globaltwo
        $global_excludes:2:!globaltwo   a/b/globaltwo
        $global_excludes:2:!globaltwo   b/globaltwo
EOF

sed -e 's/^"//' -e 's/\\//' -e 's/"$//' stdin | \
        tr "\n" "\0" >stdin0
sed -e 's/^"//' -e 's/\\//' -e 's/"$//' expected-default | \
        tr "\n" "\0" >expected-default0
sed -e 's/      "/      /' -e 's/\\//' -e 's/"$//' expected-verbose | \
        tr ":\t\n" "\0" >expected-verbose0

test_expect_success '--stdin' '
        expect_from_stdin <expected-default &&
        test_check_ignore "--stdin" <stdin
'

test_expect_success '--stdin -q' '
        expect "" &&
        test_check_ignore "-q --stdin" <stdin
'

test_expect_success '--stdin -v' '
        expect_from_stdin <expected-verbose &&
        test_check_ignore "-v --stdin" <stdin
'

for opts in '--stdin -z' '-z --stdin'
do
        test_expect_success "$opts" "
                expect_from_stdin <expected-default0 &&
                test_check_ignore '$opts' <stdin0
        "

        test_expect_success "$opts -q" "
                expect "" &&
                test_check_ignore '-q $opts' <stdin0
        "

        test_expect_success "$opts -v" "
                expect_from_stdin <expected-verbose0 &&
                test_check_ignore '-v $opts' <stdin0
        "
done

cat <<-\EOF >stdin
        ../one
        ../not-ignored
        one
        not-ignored
        b/on
        b/one
        b/one one
        "b/one two"
        "b/one\"three"
        b/two
        b/not-ignored
        b/twooo
        ../globaltwo
        globaltwo
        b/globaltwo
        ../b/globaltwo
        c/not-ignored
EOF
# N.B. we deliberately end STDIN with a non-matching pattern in order
# to test that the exit code indicates that one or more of the
# provided paths is ignored - in other words, that it represents an
# aggregation of all the results, not just the final result.

cat <<-EOF >expected-all
        .gitignore:1:one        ../one
        ::      ../not-ignored
        .gitignore:1:one        one
        ::      not-ignored
        a/b/.gitignore:8:!on*   b/on
        a/b/.gitignore:8:!on*   b/one
        a/b/.gitignore:8:!on*   b/one one
        a/b/.gitignore:8:!on*   b/one two
        a/b/.gitignore:8:!on*   "b/one\"three"
        a/b/.gitignore:9:!two   b/two
        ::      b/not-ignored
        a/.gitignore:1:two*     b/twooo
        $global_excludes:2:!globaltwo   ../globaltwo
        $global_excludes:2:!globaltwo   globaltwo
        $global_excludes:2:!globaltwo   b/globaltwo
        $global_excludes:2:!globaltwo   ../b/globaltwo
        ::      c/not-ignored
EOF
grep -v '^::    ' expected-all >expected-verbose
sed -e 's/.*    //' expected-verbose >expected-default

sed -e 's/^"//' -e 's/\\//' -e 's/"$//' stdin | \
        tr "\n" "\0" >stdin0
sed -e 's/^"//' -e 's/\\//' -e 's/"$//' expected-default | \
        tr "\n" "\0" >expected-default0
sed -e 's/      "/      /' -e 's/\\//' -e 's/"$//' expected-verbose | \
        tr ":\t\n" "\0" >expected-verbose0

test_expect_success '--stdin from subdirectory' '
        expect_from_stdin <expected-default &&
        (
                cd a &&
                test_check_ignore "--stdin" <../stdin
        )
'

test_expect_success '--stdin from subdirectory with -v' '
        expect_from_stdin <expected-verbose &&
        (
                cd a &&
                test_check_ignore "--stdin -v" <../stdin
        )
'

test_expect_success '--stdin from subdirectory with -v -n' '
        expect_from_stdin <expected-all &&
        (
                cd a &&
                test_check_ignore "--stdin -v -n" <../stdin
        )
'

for opts in '--stdin -z' '-z --stdin'
do
        test_expect_success "$opts from subdirectory" '
                expect_from_stdin <expected-default0 &&
                (
                        cd a &&
                        test_check_ignore "'"$opts"'" <../stdin0
                )
        '

        test_expect_success "$opts from subdirectory with -v" '
                expect_from_stdin <expected-verbose0 &&
                (
                        cd a &&
                        test_check_ignore "'"$opts"' -v" <../stdin0
                )
        '
done

test_expect_success PIPE 'streaming support for --stdin' '
        mkfifo in out &&
        (git check-ignore -n -v --stdin <in >out &) &&

        # We cannot just "echo >in" because check-ignore would get EOF
        # after echo exited; instead we open the descriptor in our
        # shell, and then echo to the fd. We make sure to close it at
        # the end, so that the subprocess does get EOF and dies
        # properly.
        #
        # Similarly, we must keep "out" open so that check-ignore does
        # not ever get SIGPIPE trying to write to us. Not only would that
        # produce incorrect results, but then there would be no writer on the
        # other end of the pipe, and we would potentially block forever trying
        # to open it.
        exec 9>in &&
        exec 8<out &&
        test_when_finished "exec 9>&-" &&
        test_when_finished "exec 8<&-" &&
        echo >&9 one &&
        read response <&8 &&
        echo "$response" | grep "^\.gitignore:1:one     one" &&
        echo >&9 two &&
        read response <&8 &&
        echo "$response" | grep "^::    two"
'

test_done