#!/bin/sh

# The snapshot page hands a branch back as an archive. One function below
# registers the same checks for every tar based format, and each format
# needs the same compressor cgit pipes through on the server, so one missing
# tool skips that format on both grounds at once. zip follows at the end,
# since unzip shares no flags with the rest.

test_description='Verify snapshot'
. ./setup.sh

# Registers the checks for one tar based format. Takes the archive suffix,
# the content type the response must carry, the compressor to unpack with and
# the name of the prerequisite guarding the checks.
test_tar_snapshot() {
	ext=$1
	type=$2
	tool=$3
	prereq=$4

	if command -v "$tool" >/dev/null 2>&1
	then
		test_set_prereq $prereq
	else
		say "Skipping $ext validation tests: $tool not found"
	fi

	test_expect_success $prereq "get foo/snapshot/master.$ext" "
		cgit_url 'foo/snapshot/master.$ext' >tmp
	"

	test_expect_success $prereq "check $ext response headers" "
		head -n 1 tmp | grep 'Status: 200 OK' &&
		head -n 2 tmp | grep '^Content-Type: $type\$' &&
		head -n 3 tmp | grep 'Content-Disposition: inline; filename=.master.$ext.'
	"

	test_expect_success $prereq "verify $ext format" "
		strip_headers <tmp >master.$ext &&
		'$tool' -t 'master.$ext'
	"

	test_expect_success $prereq "untar $ext and verify the content" "
		rm -rf master &&
		'$tool' -dc 'master.$ext' | tar -xf - &&
		ls master/ >output &&
		test_line_count = 5 output &&
		grep '^5\$' master/file-5 &&
		test_line_count = 1 master/file-5
	"
}

# The uncompressed tar comes straight out of git's archive writer, so tar
# itself both proves the format and unpacks it.
test_expect_success 'get foo/snapshot/master.tar' '
	cgit_url "foo/snapshot/master.tar" >tmp
'

test_expect_success 'check tar response headers' '
	head -n 1 tmp | grep "Status: 200 OK" &&
	head -n 2 tmp | grep "^Content-Type: application/x-tar$" &&
	head -n 3 tmp | grep "Content-Disposition: inline; filename=.master.tar."
'

test_expect_success 'untar and verify the content' '
	strip_headers <tmp >master.tar &&
	rm -rf master &&
	tar -xf master.tar &&
	ls master/ >output &&
	test_line_count = 5 output &&
	grep "^5$" master/file-5 &&
	test_line_count = 1 master/file-5
'

test_tar_snapshot tar.gz  application/gzip    gzip  GZIP
test_tar_snapshot tar.bz2 application/x-bzip2 bzip2 BZIP2
test_tar_snapshot tar.lz  application/x-lzip  lzip  LZIP
test_tar_snapshot tar.xz  application/x-xz    xz    XZ
test_tar_snapshot tar.zst application/zstd    zstd  ZSTD

if command -v unzip >/dev/null 2>&1
then
	test_set_prereq UNZIP
else
	say 'Skipping zip validation tests: unzip not found'
fi

test_expect_success 'get foo/snapshot/master.zip' '
	cgit_url "foo/snapshot/master.zip" >tmp
'

test_expect_success 'check zip response headers' '
	head -n 1 tmp | grep "Status: 200 OK" &&
	head -n 2 tmp | grep "^Content-Type: application/zip$" &&
	head -n 3 tmp | grep "Content-Disposition: inline; filename=.master.zip."
'

test_expect_success 'strip off the header lines' '
	strip_headers <tmp >master.zip
'

test_expect_success UNZIP 'verify zip format' '
	unzip -t master.zip
'

test_expect_success UNZIP 'unzip and verify the content' '
	rm -rf master &&
	unzip master.zip &&
	ls master/ >output &&
	test_line_count = 5 output &&
	grep "^5$" master/file-5 &&
	test_line_count = 1 master/file-5
'

# A tag named v1.0 sheds its v in the snapshot name unless dropping it would
# merge two tags. The first tag below stays a loose ref on purpose, because on
# a case-insensitive filesystem a ref lookup for V1.0 finds the loose v1.0
# file, and deciding by lookups called every fresh tag ambiguous and kept its
# v until git happened to pack the refs.
test_expect_success 'set up a repo with a versioned tag' '
	mkrepo repos/vtags 2 &&
	git -C repos/vtags update-ref refs/tags/v1.0 HEAD &&
	{
		echo "virtual-root=/" &&
		echo "cache-size=0" &&
		echo "snapshots=tar.gz" &&
		echo "repo.url=vtags" &&
		echo "repo.path=$PWD/repos/vtags/.git"
	} >vtagsrc
'

test_expect_success 'a loose v tag still sheds its v in the snapshot name' '
	CGIT_CONFIG="$PWD/vtagsrc" QUERY_STRING="url=vtags/refs/" cgit >tmp &&
	grep "vtags-1.0.tar.gz" tmp &&
	! grep "vtags-v1.0.tar.gz" tmp
'

# The second tag goes in only after the first is packed, since two loose files
# differing in case alone cannot coexist on a case-insensitive filesystem.
test_expect_success 'a real case collision keeps the v on both tags' '
	git -C repos/vtags pack-refs --all &&
	git -C repos/vtags update-ref refs/tags/V1.0 HEAD~1 &&
	CGIT_CONFIG="$PWD/vtagsrc" QUERY_STRING="url=vtags/refs/" cgit >tmp &&
	grep "vtags-v1.0.tar.gz" tmp &&
	grep "vtags-V1.0.tar.gz" tmp &&
	! grep "vtags-1.0.tar.gz" tmp
'

test_done