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name: t/t0021-conversion.sh 	 # note: path name is non-authoritative(*)

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#!/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_expect_success "filter: clean empty file" '
	git config filter.in-repo-header.clean  "echo cleaned && cat" &&
	git config filter.in-repo-header.smudge "sed 1d" &&

	echo "empty-in-worktree    filter=in-repo-header" >>.gitattributes &&
	>empty-in-worktree &&

	echo cleaned >expected &&
	git add empty-in-worktree &&
	git show :empty-in-worktree >actual &&
	test_cmp expected actual
'

test_expect_success "filter: smudge empty file" '
	git config filter.empty-in-repo.clean "cat >/dev/null" &&
	git config filter.empty-in-repo.smudge "echo smudged && cat" &&

	echo "empty-in-repo filter=empty-in-repo" >>.gitattributes &&
	echo dead data walking >empty-in-repo &&
	git add empty-in-repo &&

	echo smudged >expected &&
	git checkout-index --prefix=filtered- empty-in-repo &&
	test_cmp expected filtered-empty-in-repo
'

test_expect_success 'disable filter with empty override' '
	test_config_global filter.disable.smudge false &&
	test_config_global filter.disable.clean false &&
	test_config filter.disable.smudge false &&
	test_config filter.disable.clean false &&

	echo "*.disable filter=disable" >.gitattributes &&

	echo test >test.disable &&
	git -c filter.disable.clean= add test.disable 2>err &&
	test_must_be_empty err &&
	rm -f test.disable &&
	git -c filter.disable.smudge= checkout -- test.disable 2>err &&
	test_must_be_empty err
'

test_done

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