#!/bin/sh

# Checks the post-receive hooks under custom/hooks. The cache hook runs from a
# copy pointed at a cache and a scan path in the trash directory, since the
# shipped one names the system's own, and the hooks run inside bare
# repositories the way git runs them after a push.

test_description='Check the shipped post-receive hooks'
CGIT_TEST_NO_CREATE_REPOS=YesPlease
. ./setup.sh

HOOK_DIRECTORY="$TEST_OUTPUT_DIRECTORY/../custom/hooks"

# The request each page slot in a directory answers, read off its head the
# way the hook reads it, leaving out the locks and the cached repository
# scan.
cached_requests() {
	test -d "$1" || return 1
	for slot in "$1"/*
	do
		case $slot in
		*.lock | */rc-*)
			continue
			;;
		esac
		dd if="$slot" bs=4096 count=1 2>/dev/null >slot-head &&
		tr "\0" "\n" <slot-head | sed -n 1p || return 1
	done
}

# Every cache hook run starts from the cache as cgit left it.
fresh_slots() {
	rm -rf slots && cp -R pristine slots
}

# A cache that cgit itself filled, for two scanned repositories and the
# index, so the hook reads the keys cgit really writes. Each page has to
# have a slot of its own, or a check that a page went would pass for one
# that was never there.
test_expect_success 'set up a cache of two repositories and the index' '
	test_create_repo pusher &&
	test_commit -C pusher cached &&
	mkdir scan slots &&
	git init -q --bare scan/a.git &&
	git init -q --bare scan/b.git &&
	git -C pusher push -q ../scan/a.git HEAD:refs/heads/main &&
	git -C pusher push -q ../scan/b.git HEAD:refs/heads/main &&
	{
		echo "cache-root=$PWD/slots" &&
		echo "cache-size=1000" &&
		echo "virtual-root=/" &&
		echo "scan-path=$PWD/scan"
	} >cachedrc &&
	for page in / /a.git/ /a.git/log/ /b.git/ /b.git/log/
	do
		CGIT_CONFIG="$PWD/cachedrc" PATH_INFO="$page" QUERY_STRING= cgit >/dev/null ||
		return 1
	done &&
	cgit_rc cachedrc "url=a.git/refs/" >/dev/null &&
	cgit_rc cachedrc "url=b.git/refs/" >/dev/null &&
	echo writer >slots/0123abcd.lock &&
	cp -R slots pristine &&
	sort >expect-keys <<-\EOF &&
	7|http://0|1|/0|
	7|http://0|7|/a.git/0|
	7|http://0|11|/a.git/log/0|
	7|http://0|7|/b.git/0|
	7|http://0|11|/b.git/log/0|
	7|http://0|0|15|url=a.git/refs/
	7|http://0|0|15|url=b.git/refs/
	EOF
	cached_requests pristine >keys &&
	sort keys >sorted-keys &&
	test_cmp expect-keys sorted-keys &&
	ls pristine >pristine-slots &&
	grep "^rc-" pristine-slots &&
	sed -e "s|^cache_root=.*|cache_root='\''$PWD/slots'\''|" \
		-e "s|^scan_path=.*|scan_path='\''$PWD/scan'\''|" \
		"$HOOK_DIRECTORY/post-receive.cgit-cache" >cache-hook &&
	grep -Fx "cache_root='\''$PWD/slots'\''" cache-hook &&
	grep -Fx "scan_path='\''$PWD/scan'\''" cache-hook
'

# The hooks are POSIX sh, so every case runs under each such shell that is
# here. Whatever a hook prints reaches the pusher, so each has to stay
# silent.
shells=
for shell in sh dash ksh bash
do
	command -v $shell >/dev/null && shells="$shells $shell"
done

for shell in $shells
do
	test_expect_success "a push drops its own pages and the index under $shell" '
		fresh_slots &&
		(cd scan/a.git && $shell ../../cache-hook 2>../../err) &&
		test_must_be_empty err &&
		cached_requests slots >left &&
		test_grep "|/b.git/log/" left &&
		test_grep "url=b.git/refs/" left &&
		test_grep ! "a.git" left &&
		test_grep ! "1|/0|" left &&
		test_path_is_file slots/0123abcd.lock &&
		ls slots >left-slots &&
		test_grep ! "^rc-" left-slots
	'

	test_expect_success "a repository named in cgitrc gives the hook its url under $shell" '
		fresh_slots &&
		git -C scan/b.git config hooks.cgiturl b.git &&
		sed "s|^scan_path=.*|scan_path=/nonexistent|" cache-hook >named-hook &&
		grep -Fx "scan_path=/nonexistent" named-hook &&
		(cd scan/b.git && $shell ../../named-hook 2>../../err) &&
		test_must_be_empty err &&
		cached_requests slots >left &&
		test_grep "|/a.git/log/" left &&
		test_grep ! "b.git" left
	'

	test_expect_success "with no url to go on the whole cache goes under $shell" '
		fresh_slots &&
		(cd scan/a.git && $shell ../../named-hook 2>../../err) &&
		test_must_be_empty err &&
		test "$(ls slots)" = 0123abcd.lock
	'

	test_expect_success SANITY "the cache hook shows a pusher no error under $shell" '
		fresh_slots &&
		test_when_finished "chmod 755 slots" &&
		chmod 555 slots &&
		(cd scan/a.git && $shell ../../cache-hook 2>../../err) &&
		test_must_be_empty err &&
		ls slots >left &&
		test_cmp pristine-slots left
	'
done

# The newest branch tip by committer date is main. The other branch has the
# newer author date, a tag outside refs/heads points at a newer commit
# still, and an annotated tag was made later than all of them.
test_expect_success 'set up a repository whose dates disagree' '
	test_create_repo work &&
	(
		cd work &&
		echo one >file &&
		git add file &&
		GIT_AUTHOR_DATE="2001-01-01 00:00:00 +0000" \
		GIT_COMMITTER_DATE="2021-02-03 04:05:06 +0000" git commit -q -m newest &&
		git branch -M main &&
		git checkout -q -b old &&
		echo two >file &&
		GIT_AUTHOR_DATE="2029-01-01 00:00:00 +0000" \
		GIT_COMMITTER_DATE="2019-01-01 00:00:00 +0000" git commit -q -a -m older &&
		echo three >file &&
		GIT_COMMITTER_DATE="2025-01-01 00:00:00 +0000" git commit -q -a -m loose &&
		git tag loose &&
		git reset -q --hard HEAD^ &&
		GIT_COMMITTER_DATE="2027-01-01 00:00:00 +0000" git tag -a -m release release main
	) &&
	git init -q --bare plain.git &&
	git -C work push -q ../plain.git main old loose release &&
	echo "2021-02-03 04:05:06 +0000" >expect &&
	echo last-modified >expect-entries &&
	echo kept >kept
'

for shell in $shells
do
	test_expect_success "the age hook writes the newest branch commit date under $shell" '
		rm -f plain.git/info/web/last-modified &&
		(cd plain.git && $shell "$HOOK_DIRECTORY/post-receive.cgit-age" 2>../err) &&
		test_must_be_empty err &&
		test_cmp expect plain.git/info/web/last-modified &&
		ls plain.git/info/web >entries &&
		test_cmp expect-entries entries
	'

	test_expect_success SANITY "the age hook shows a pusher no error under $shell" '
		cp kept plain.git/info/web/last-modified &&
		test_when_finished "chmod 755 plain.git/info/web" &&
		chmod 555 plain.git/info/web &&
		(cd plain.git && $shell "$HOOK_DIRECTORY/post-receive.cgit-age" 2>../err) &&
		test_must_be_empty err &&
		test_cmp kept plain.git/info/web/last-modified &&
		ls plain.git/info/web >entries &&
		test_cmp expect-entries entries
	'

	test_expect_success "the age hook leaves a repository with no branches as it was under $shell" '
		git init -q --bare tags-$shell.git &&
		git -C work push -q ../tags-$shell.git release &&
		mkdir -p tags-$shell.git/info/web &&
		echo kept >tags-$shell.git/info/web/last-modified &&
		(cd tags-$shell.git && $shell "$HOOK_DIRECTORY/post-receive.cgit-age" 2>../err) &&
		test_must_be_empty err &&
		test_cmp kept tags-$shell.git/info/web/last-modified
	'

	test_expect_success SANITY "the age hook shows no error when it cannot make its directory under $shell" '
		git init -q --bare closed-$shell.git &&
		git -C work push -q ../closed-$shell.git main &&
		test_when_finished "chmod 755 closed-$shell.git/info" &&
		chmod 555 closed-$shell.git/info &&
		(cd closed-$shell.git && $shell "$HOOK_DIRECTORY/post-receive.cgit-age" 2>../err) &&
		test_must_be_empty err &&
		test_path_is_missing closed-$shell.git/info/web
	'

	# git keeps a shared repository group writable whatever the pusher's
	# umask, and the next member to push has to be able to replace the file.
	test_expect_success SANITY "the age hook keeps a shared directory group writable under $shell" '
		git init -q --bare --shared=group shared-$shell.git &&
		git -C work push -q ../shared-$shell.git main &&
		(cd shared-$shell.git && umask 022 && $shell "$HOOK_DIRECTORY/post-receive.cgit-age" 2>../err) &&
		test_must_be_empty err &&
		ls -ld shared-$shell.git/info/web >mode &&
		test_grep "^drwxrw[xs]" mode
	'

	# The web server reads what the hooks write, so the pusher's own umask
	# must not keep it out.
	test_expect_success "the age hook writes a file anyone can read under a tight umask under $shell" '
		git init -q --bare private-$shell.git &&
		git -C work push -q ../private-$shell.git main &&
		(cd private-$shell.git && umask 077 && $shell "$HOOK_DIRECTORY/post-receive.cgit-age" 2>../err) &&
		test_must_be_empty err &&
		ls -ld private-$shell.git/info/web private-$shell.git/info/web/last-modified >mode &&
		test_grep "^drwxr-xr-x" mode &&
		test_grep "^-rw-r--r--" mode
	'

	test_expect_success "the age hook reads core.sharedRepository as git does under $shell" '
		git -C private-$shell.git config core.sharedRepository FALSE &&
		rm private-$shell.git/info/web/last-modified &&
		(cd private-$shell.git && umask 077 && $shell "$HOOK_DIRECTORY/post-receive.cgit-age" 2>../err) &&
		test_must_be_empty err &&
		ls -l private-$shell.git/info/web/last-modified >mode &&
		test_grep "^-rw-r--r--" mode &&
		git -C private-$shell.git config core.sharedRepository 0660 &&
		rm private-$shell.git/info/web/last-modified &&
		(cd private-$shell.git && umask 077 && $shell "$HOOK_DIRECTORY/post-receive.cgit-age" 2>../err) &&
		test_must_be_empty err &&
		ls -l private-$shell.git/info/web/last-modified >mode &&
		test_grep "^-rw-rw-r--" mode
	'

	test_expect_success "the commit-graph hook writes a graph with path filters under $shell" '
		git init -q --bare graph-$shell.git &&
		git -C work push -q ../graph-$shell.git main &&
		(cd graph-$shell.git && $shell "$HOOK_DIRECTORY/post-receive.commit-graph" 2>../err) &&
		test_must_be_empty err &&
		test_path_is_file graph-$shell.git/objects/info/commit-graphs/commit-graph-chain &&
		grep -q BDAT graph-$shell.git/objects/info/commit-graphs/*.graph &&
		git -C graph-$shell.git commit-graph verify
	'

	test_expect_success "the commit-graph hook writes a graph anyone can read under a tight umask under $shell" '
		git init -q --bare private-graph-$shell.git &&
		git -C work push -q ../private-graph-$shell.git main &&
		(cd private-graph-$shell.git && umask 077 && $shell "$HOOK_DIRECTORY/post-receive.commit-graph" 2>../err) &&
		test_must_be_empty err &&
		ls -l private-graph-$shell.git/objects/info/commit-graphs >modes &&
		test_grep "commit-graph-chain" modes &&
		test_grep "\.graph" modes &&
		test_grep ! "^-r-------" modes
	'

	test_expect_success "a later push moves the graph on under $shell" '
		cat graph-$shell.git/objects/info/commit-graphs/commit-graph-chain >chain-$shell &&
		test_commit -C work graph-$shell &&
		git -C work push -q ../graph-$shell.git HEAD:main &&
		(cd graph-$shell.git && $shell "$HOOK_DIRECTORY/post-receive.commit-graph" 2>../err) &&
		test_must_be_empty err &&
		! test_cmp chain-$shell graph-$shell.git/objects/info/commit-graphs/commit-graph-chain &&
		git -C graph-$shell.git commit-graph verify
	'
done

test_done