index : cgit

#!/bin/sh

# Regression tests from the audits of September and October 2026. Each case
# is a config, repository or request that used to crash cgit, end it inside
# git, or hand a visitor something other than what was asked for.

test_description='Check the audit regressions'
. ./setup.sh

test_expect_success 'set up a repository and a config to vary' '
	mkrepo repos/rob 3 &&
	sha=$(git -C repos/rob rev-parse HEAD~1) &&
	cgitrc_repo robrc rob snapshots=tar.gz
'

test_expect_success 'a repository without a path answers 404' '
	{
		echo "virtual-root=/" &&
		echo "cache-size=0" &&
		echo "repo.url=nopath" &&
		echo "repo.url=emptypath" &&
		echo "repo.path="
	} >nopathrc &&
	for r in nopath emptypath
	do
		cgit_rc nopathrc "url=$r/log/" >tmp &&
		grep "^Status: 404 Not Found" tmp &&
		grep "Failed to open $r: Not a valid git repository" tmp || return 1
	done
'

# The index dates a repository from files under its path, and one without a
# path has none, whatever sits in the working directory.
test_expect_success 'a repository without a path has no age on the index' '
	mkdir -p "(null)/refs/heads" &&
	>"(null)/refs/heads/master" &&
	cgit_rc nopathrc "url=" >tmp &&
	grep "</html>" tmp &&
	! grep "<time " tmp
'

test_expect_success 'a repository with an empty url is skipped with a warning' '
	{
		echo "virtual-root=/" &&
		echo "cache-size=0" &&
		echo "repo.url=" &&
		echo "repo.path=$PWD/repos/rob/.git" &&
		echo "repo.desc=nourl" &&
		echo "repo.url=rob" &&
		echo "repo.path=$PWD/repos/rob/.git"
	} >nourlrc &&
	cgit_rc nourlrc "url=rob/" >tmp 2>err &&
	grep "^Status: 200" tmp &&
	grep "Ignoring repository with an empty url" err &&
	cgit_rc nourlrc "url=" >tmp &&
	! grep nourl tmp &&
	cgit_rc nourlrc "r=" >tmp &&
	! grep nourl tmp
'

test_expect_success 'a scan path that is itself a repository is named after it' '
	{
		echo "virtual-root=/" &&
		echo "cache-size=0" &&
		echo "remove-suffix=1" &&
		echo "scan-path=$PWD/repos/rob"
	} >rootrc &&
	cgit_rc rootrc "url=" >tmp &&
	grep "toplevel-repo.><a href=./rob/.>rob</a>" tmp
'

test_expect_success 'a repo key after scan-path is reported instead of applied' '
	{
		echo "virtual-root=/" &&
		echo "cache-size=0" &&
		echo "repo.url=first" &&
		echo "repo.path=$PWD/repos/rob/.git" &&
		echo "scan-path=$PWD/repos" &&
		echo "repo.desc=misplaced"
	} >stalerc &&
	cgit_rc stalerc "url=" >tmp 2>err &&
	! grep "misplaced" tmp &&
	grep "Ignoring repo.desc before any repo.url" err
'

test_expect_success 'a valueless or broken git config in a scanned repository is skipped' '
	git clone -q --bare repos/rob/.git scan/a.git &&
	printf "[cgit]\n\thide\n[cgit\n" >>scan/a.git/config &&
	{
		echo "virtual-root=/" &&
		echo "cache-size=0" &&
		echo "enable-git-config=1" &&
		echo "scan-path=$PWD/scan"
	} >gitcfgrc &&
	cgit_rc gitcfgrc "url=" >tmp 2>err &&
	grep "toplevel-repo.><a href=./a.git/.>" tmp &&
	grep "Ignoring unreadable config in $PWD/scan/a.git/config" err
'

test_expect_success 'only descriptive keys are taken from a scanned repository' '
	git clone -q --bare repos/rob/.git scan/b.git &&
	{
		echo "desc=from the repo" &&
		echo "readme=master:file-1" &&
		echo "head-content=<script>alert(1)</script>" &&
		echo "logo-link=javascript:alert(2)"
	} >scan/b.git/cgitrc &&
	cgit_rc gitcfgrc "url=b.git/about/" >tmp 2>err &&
	grep "from the repo" tmp &&
	grep "pre class=.plaintext." tmp &&
	! grep "alert(" tmp &&
	grep "Ignoring head-content in $PWD/scan/b.git/: trust-scan-config is not set" err &&
	grep "Ignoring logo-link in " err
'

test_expect_success 'a filesystem readme from a scanned repository is refused' '
	echo "readme=/etc/hosts" >scan/b.git/cgitrc &&
	cgit_rc gitcfgrc "url=b.git/about/" >tmp 2>err &&
	grep "Ignoring readme in " err
'

# A colon with nothing after it names no ref, so the setting is a path on
# disk and has to wait on trust like any other.
test_expect_success 'a readme ending in a colon is refused like a path on disk' '
	echo "outside the repository" >"scan/outside:" &&
	echo "readme=../outside:" >scan/b.git/cgitrc &&
	cgit_rc gitcfgrc "url=b.git/about/" >tmp 2>err &&
	grep "Ignoring readme in " err &&
	! grep "outside the repository" tmp
'

# The readme list is read as a page is served rather than copied at the
# scan-path line, so a readme set after the scan still applies.
test_expect_success 'a readme set after scan-path reaches a scanned repository' '
	rm scan/b.git/cgitrc &&
	cat gitcfgrc >laterrc &&
	echo "readme=master:file-1" >>laterrc &&
	cgit_rc laterrc "url=b.git/about/" >tmp &&
	grep "<pre class=.plaintext.>1$" tmp
'

# A repository served as html runs its pages on the site's own origin, so
# the switch waits on trust like the keys that place markup. The warning has
# to name the repository, which it did not for a key read from git config.
test_expect_success 'html serving from a scanned repository waits on trust' '
	(
		cd repos/rob &&
		printf "<p>page</p>\n" >page.html &&
		git add page.html &&
		git commit -m html
	) &&
	mkdir -p scan2 &&
	git clone -q --bare repos/rob/.git scan2/c.git &&
	git -C scan2/c.git config cgit.enable-html-serving 1 &&
	{
		echo "virtual-root=/" &&
		echo "cache-size=0" &&
		echo "enable-git-config=1" &&
		echo "mimetype.html=text/html" &&
		echo "scan-path=$PWD/scan2"
	} >htmlrc &&
	cgit_rc htmlrc "url=c.git/plain/page.html" >tmp 2>err &&
	grep "^Content-Type: text/plain" tmp &&
	grep "^X-Content-Type-Options: nosniff" tmp &&
	grep "Ignoring enable-html-serving in $PWD/scan2/c.git/: trust-scan-config is not set" err
'

test_expect_success 'with trust-scan-config the same repository serves html' '
	{
		echo "trust-scan-config=1" &&
		cat htmlrc
	} >htmltrustrc &&
	cgit_rc htmltrustrc "url=c.git/plain/page.html" >tmp &&
	grep "^Content-Type: text/html" tmp &&
	! grep "^X-Content-Type-Options" tmp
'

test_expect_success SYMLINKS 'a symlink cycle under the scan path is entered once' '
	ln -s . scan/loop &&
	cgit_rc gitcfgrc "url=" >tmp &&
	test $(grep -c "toplevel-repo" tmp) = 2
'

test_expect_success 'a bare query parameter does not swallow the next one' '
	cgit_rc robrc "url=rob/commit/&x&id=$sha" >tmp &&
	grep "<div class=.commit-subject.>commit 2" tmp
'

# Whether cgit first sees the filter's exit status or its closed pipe
# depends on which side runs first, so either message will do.
test_expect_success 'a filter that cannot run answers one error page' '
	{
		echo "commit-filter=exec:$PWD/no/such/filter" &&
		cat robrc
	} >badfilterrc &&
	cgit_rc badfilterrc "url=rob/commit/" >tmp 2>err &&
	test $(grep -c "^Status:" tmp) = 1 &&
	grep "Unable to complete the request" tmp &&
	grep -e "Unable to run filter $PWD/no/such/filter" -e "Unable to write the page" err &&
	grep "Unable to exec filter" err
'

# The filter may exit before or after cgit writes to it, so the page either
# completes or ends where the write failed. Either way cgit answers once and
# exits cleanly rather than dying of SIGPIPE.
test_expect_success 'a filter that exits without reading does not end cgit' '
	{
		echo "email-filter=exec:true" &&
		cat robrc
	} >truerc &&
	cgit_rc truerc "url=rob/log/" >tmp &&
	test $(grep -c "^Status:" tmp) = 1
'

test_expect_success 'a commit encoding header is read without its newline' '
	(
		cd repos/rob &&
		echo more >file-1 &&
		git add file-1 &&
		git -c i18n.commitEncoding=ISO-8859-1 commit -m "$(printf "caf\351")"
	) &&
	cgit_rc robrc "url=rob/commit/" >tmp &&
	grep "<div class=.commit-subject.>caf$(printf "\303\251")<" tmp
'

# The about page shows the readme alone and its links lead into the tree,
# so a path below it names nothing, the site about page included.
test_expect_success 'a path below the about page answers 404' '
	(
		cd repos/rob &&
		git update-index --add --cacheinfo 160000,$sha,sub &&
		git commit -m gitlink
	) &&
	{
		echo "mimetype.png=image/png" &&
		cat robrc &&
		echo "repo.readme=master:file-1"
	} >aboutrc &&
	for path in sub sub/ missing.png file-1 ../robrc
	do
		cgit_rc aboutrc "url=rob/about/$path" >tmp 2>err &&
		grep "^Status: 404" tmp &&
		grep "^Content-Type: text/html" tmp &&
		! grep fatal err || return 1
	done &&
	cgit_rc aboutrc "p=about&path=x" >tmp &&
	grep "^Status: 404" tmp
'

test_expect_success 'a snapshot name holding a slash is refused' '
	cgit_rc robrc "url=rob/snapshot/:/../../...tar.gz" >tmp &&
	grep "^Status: 404" tmp &&
	cgit_rc robrc "url=rob/snapshot/rob-master.tar.gz" >tmp &&
	grep "^Status: 200" tmp
'

test_expect_success 'a path opening with a colon is refused on the log and patch pages' '
	cgit_rc robrc "url=rob/log/:%25x" >tmp &&
	grep "^Status: 400" tmp &&
	cgit_rc robrc "url=rob/patch/:%25x" >tmp &&
	grep "^Status: 400" tmp &&
	test $(grep -c "^Status:" tmp) = 1
'

test_expect_success 'a revision spelled like an option is refused' '
	git -C repos/rob update-ref refs/heads/--stdin HEAD &&
	cgit_rc robrc "url=rob/log/&h=--stdin" >tmp &&
	grep "^Status: 404" tmp &&
	cgit_rc robrc "url=rob/blame/file-1&id=--stdin" >tmp &&
	grep "^Status: 400" tmp &&
	cgit_rc robrc "url=rob/atom/&h=--stdin" >tmp &&
	grep "^Status: 404" tmp
'

test_expect_success 'the blob page reads a file through an annotated tag' '
	git -C repos/rob -c tag.gpgsign=false tag -a -m note ann HEAD &&
	cgit_rc robrc "url=rob/blob/&h=ann&path=file-1" >tmp &&
	strip_headers <tmp >body &&
	printf "more\n" >want &&
	test_cmp want body
'

# The plain page walks a path out of whatever commit the id names, and the
# blob page used to answer such a request with the raw commit object.
test_expect_success 'the blob page walks a path out of the commit or tag the id names' '
	tip=$(git -C repos/rob rev-parse HEAD) &&
	cgit_rc robrc "url=rob/blob/file-1&id=$tip" >tmp &&
	strip_headers <tmp >body &&
	test_cmp want body &&
	tag=$(git -C repos/rob rev-parse ann) &&
	cgit_rc robrc "url=rob/blob/file-1&id=$tag" >tmp &&
	strip_headers <tmp >body &&
	test_cmp want body &&
	cgit_rc robrc "url=rob/blob/missing&id=$tip" >tmp &&
	grep "^Status: 404" tmp
'

test_expect_success 'the commit page shows a message whole when text follows its trailers' '
	(
		cd repos/rob &&
		echo again >file-1 &&
		git add file-1 &&
		git commit -F - <<-\EOF
		Subject

		Body text.

		Signed-off-by: A U Thor <author@example.com>

		Conflicts:
			file-1
		EOF
	) &&
	{
		echo "enable-commit-trailers=1" &&
		cat robrc
	} >trailrc &&
	cgit_rc trailrc "url=rob/commit/" >tmp &&
	! grep "commit-trailers" tmp &&
	grep "Conflicts:" tmp
'

test_expect_success 'a revision expression that walks the history is refused' '
	cgit_rc robrc "url=rob/log/&h=:/zzzz" >tmp &&
	grep "^Status: 404" tmp &&
	cgit_rc robrc "url=rob/commit/&id=HEAD^{/zzzz}" >tmp &&
	grep "^Status: 400" tmp &&
	cgit_rc robrc "url=rob/log/&qt=range&q=:/zzzz" >tmp &&
	grep "^Status: 400" tmp &&
	cgit_rc robrc "url=rob/log/&qt=range&q=master~1..master" >tmp &&
	grep "^Status: 400" tmp &&
	cgit_rc robrc "url=rob/log/&qt=range&q=$sha..master" >tmp &&
	grep "^Status: 200" tmp
'

test_expect_success 'a commit with a broken tree line does not crash the blob page' '
	git clone -q repos/rob broken &&
	(
		cd broken &&
		bad=$(git cat-file commit HEAD | sed "s/^tree .*/tree not-a-hash/" |
			git hash-object -t commit -w --stdin --literally) &&
		echo $bad >.git/refs/heads/bad
	) &&
	cgitrc_repo brokenrc broken "repo.path=$PWD/broken/.git" repo.readme=:file-1 &&
	cgit_rc brokenrc "url=broken/blob/&h=bad&path=file-1" >tmp &&
	grep "^Status: 404" tmp
'

test_expect_success 'a die inside git answers one 500 page and logs the reason' '
	printf "[core\n" >>broken/.git/config &&
	cgit_rc brokenrc "url=broken/log/" >tmp 2>err &&
	grep "^Status: 500" tmp &&
	test $(grep -c "^Status:" tmp) = 1 &&
	grep "bad config line" err &&
	! grep "bad config line" tmp
'

test_expect_success 'a history with a missing parent renders up to the gap' '
	git clone -q repos/rob gap &&
	older=$(git -C gap rev-parse HEAD~3) &&
	parent=$(git -C gap rev-parse HEAD~2) &&
	rm gap/.git/objects/$(echo $parent | cut -c1-2)/$(echo $parent | cut -c3-) &&
	cgitrc_repo gaprc gap "repo.path=$PWD/gap/.git" &&
	cgit_rc gaprc "url=gap/log/" >tmp 2>err &&
	test $(grep -c "^Status:" tmp) = 1 &&
	grep "Unable to complete the request" tmp &&
	grep "Failed to traverse parents" err &&
	cgit_rc gaprc "url=gap/patch/&id2=$older" >tmp &&
	test $(grep -c "^Status:" tmp) = 1 &&
	grep "^Status: 500" tmp
'

# The commit page collects each file's diff body before printing it, so a
# die while one is collected has to reach the page rather than the body.
test_expect_success 'a corrupt blob in a collected diff answers the error' '
	git init -q corrupt &&
	(
		cd corrupt &&
		test_seq 2000 >f &&
		git add f &&
		git commit -q -m one &&
		test_seq 2000 | sed "s/^5/X/" >f &&
		git commit -q -a -m two &&
		blob=$(git rev-parse HEAD:f) &&
		obj=.git/objects/$(echo $blob | cut -c1-2)/$(echo $blob | cut -c3-) &&
		size=$(wc -c <$obj) &&
		chmod u+w $obj &&
		test_copy_bytes $((size / 2)) <$obj >half &&
		mv half $obj
	) &&
	cgitrc_repo corruptrc corrupt "repo.path=$PWD/corrupt/.git" &&
	cgit_rc corruptrc "url=corrupt/commit/" >tmp 2>err &&
	grep "is corrupt" err &&
	grep "Unable to complete the request" tmp
'

# Shells word the failed write differently, and dash names no broken pipe at
# all, so the test looks at whether the writer outlived the closed pipe. It
# puts out more than a pipe holds, so it meets the closed end whatever the
# timing, and it is a script of its own because a subshell of ksh stops at
# the failed write even with the signal ignored.
test_expect_success 'a filter pipeline sees the default SIGPIPE disposition' '
	write_script writer.sh <<-\EOF &&
	n=0
	while test $n -lt 20000
	do
		echo line
		n=$((n + 1))
	done
	echo outlived >"$PWD/outlived"
	EOF
	write_script pipe.sh <<-EOF &&
	"$PWD/writer.sh" | head -n 1
	EOF
	cgitrc_repo piperc rob "source-filter=exec:$PWD/pipe.sh" &&
	cgit_ok piperc "url=rob/tree/file-1" >tmp &&
	test_grep "<pre><code>line$" tmp &&
	test_path_is_missing outlived
'

test_expect_success 'the fallback branch skips a name spelled like an option' '
	git -C repos/rob update-ref refs/heads/-first HEAD &&
	git -C repos/rob symbolic-ref HEAD refs/heads/gone &&
	cgit_rc robrc "url=rob/" >tmp &&
	git -C repos/rob symbolic-ref HEAD refs/heads/master &&
	grep "^Status: 200" tmp
'

# Such a branch is refused as a head, so the switcher must not offer a
# choice that can only lead to an error page.
test_expect_success 'the branch switcher leaves out a name spelled like an option' '
	grep "<option value=.master." tmp &&
	! grep "<option value=.-first." tmp
'

test_expect_success 'a blank line in the mimetype file is skipped' '
	(
		cd repos/rob &&
		echo note >note.cgt &&
		git add note.cgt &&
		git commit -m note
	) &&
	printf "\n   \nimage/x-cgit cgt\n" >mime.types &&
	{
		echo "mimetype-file=$PWD/mime.types" &&
		cat robrc
	} >mimerc &&
	cgit_rc mimerc "url=rob/plain/note.cgt" >tmp &&
	grep "^Content-Type: image/x-cgit" tmp
'

test_expect_success 'an indented comment in the mimetype file is skipped' '
	printf "  # cgt used to be image/x-old\nimage/x-cgit cgt\n" >mime.types &&
	cgit_rc mimerc "url=rob/plain/note.cgt" >tmp &&
	grep "^Content-Type: image/x-cgit" tmp
'

test_expect_success 'a refs page named with an id is not cached for ever' '
	{
		echo "cache-size=10" &&
		echo "cache-root=$PWD/cache" &&
		echo "cache-static-ttl=-1" &&
		echo "cache-dynamic-ttl=0" &&
		echo "cache-summary-ttl=0" &&
		grep -v "^cache-size" robrc
	} >ttlrc &&
	full=$(git -C repos/rob rev-parse HEAD) &&
	cgit_rc ttlrc "url=rob/refs/&id=$full" >tmp &&
	git -C repos/rob tag later HEAD &&
	cgit_rc ttlrc "url=rob/refs/&id=$full" >tmp &&
	grep ">later<" tmp
'

test_expect_success 'the diff caps hold when the path names a directory' '
	(
		cd repos/rob &&
		mkdir -p dir &&
		for n in 1 2 3
		do
			echo $n >dir/f$n || return 1
		done &&
		git add dir &&
		git commit -m dir
	) &&
	{
		echo "max-diff-files=2" &&
		cat robrc
	} >caprc &&
	cgit_rc caprc "url=rob/diff/dir" >tmp &&
	grep "too large to be rendered inline" tmp &&
	cgit_rc caprc "url=rob/diff/dir/f1" >tmp &&
	! grep "too large to be rendered inline" tmp
'

test_expect_success 'a snapshot of a tag spelled like an option is archived' '
	git -C repos/rob update-ref refs/tags/-l HEAD &&
	cgit_rc robrc "url=rob/snapshot/-l.tar.gz" >tmp &&
	grep "^Status: 200" tmp &&
	strip_headers <tmp | gzip -dc | tar -tf - >list &&
	grep "file-1" list
'

test -n "$CGIT_VALGRIND" || test_set_prereq NO_VALGRIND

test_expect_success NO_VALGRIND 'a snapshot format whose compressor is missing answers 500' '
	{
		echo "snapshots=tar.xz" &&
		grep -v "^snapshots" robrc
	} >xzrc &&
	cgitbin=$(command -v cgit) &&
	mkdir -p nobin &&
	PATH="$PWD/nobin" CGIT_CONFIG="$PWD/xzrc" \
		QUERY_STRING="url=rob/snapshot/rob-master.tar.xz" $cgitbin >tmp &&
	grep "^Status: 500" tmp &&
	test $(grep -c "^Status:" tmp) = 1
'

test_expect_success 'a disk readme in the repository directory serves no sibling' '
	echo hello >repos/rob/.git/README &&
	{
		cat robrc &&
		echo "repo.readme=README"
	} >diskrc &&
	cgit_rc diskrc "url=rob/about/" >tmp &&
	grep "hello" tmp &&
	cgit_rc diskrc "url=rob/about/config" >tmp &&
	grep "^Status: 404" tmp &&
	! grep "repositoryformatversion" tmp
'

test_expect_success 'a tag pointing at a tag links the inner tag by id' '
	git -C repos/rob -c tag.gpgsign=false tag -a -m outer outer ann &&
	inner=$(git -C repos/rob rev-parse ann) &&
	cgit_rc robrc "url=rob/tag/&id=$inner" >tmp &&
	grep "^Status: 200" tmp &&
	grep "tagged object" tmp
'

test_expect_success 'the dumb transport serves an empty repository' '
	git init -q --bare empty.git &&
	cgitrc_repo emptyrc empty "repo.path=$PWD/empty.git" &&
	cgit_rc emptyrc "url=empty/info/refs" >tmp &&
	grep "^Status: 200" tmp &&
	grep "^Content-Type: text/plain" tmp &&
	cgit_rc emptyrc "url=empty/objects/info" >tmp &&
	grep "^Status: 404" tmp
'

# A pack is handed over as it sits on the disk, so the client can be told
# its size up front and compare what arrived against it.
test_expect_success 'the dumb transport sends a file with its size' '
	git -C repos/rob repack -q -d &&
	cgit_rc robrc "url=rob/objects/info/packs" >tmp &&
	pack=$(strip_headers <tmp | sed -n "s/^P //p" | head -1) &&
	test -n "$pack" &&
	cgit_rc robrc "url=rob/objects/pack/$pack" >tmp &&
	grep "^Status: 200" tmp &&
	size=$(wc -c <repos/rob/.git/objects/pack/$pack | tr -d " ") &&
	grep "^Content-Length: $size$" tmp &&
	strip_headers <tmp >body &&
	cmp body repos/rob/.git/objects/pack/$pack
'

# The alternates file lists object directories by their path on the server,
# which a client fetching over http cannot use and should not learn.
test_expect_success 'the dumb transport withholds the alternates file' '
	mkdir -p repos/rob/.git/objects/info &&
	echo "$PWD/repos/foo/.git/objects" >repos/rob/.git/objects/info/alternates &&
	for path in info/alternates info//alternates info/./alternates ./info/alternates \
		info/Alternates /info/alternates
	do
		cgit_rc robrc "url=rob/objects/$path" >tmp &&
		grep "^Status: 404" tmp &&
		! grep "repos/foo" tmp || return 1
	done &&
	rm repos/rob/.git/objects/info/alternates &&
	cgit_rc robrc "url=rob/objects/info/packs" >tmp &&
	grep "^Status: 200" tmp
'

# A reftable repository keeps only a placeholder in its HEAD file, so the
# branch a client is to check out has to come from the refs instead.
test_expect_success 'the dumb transport answers HEAD from the refs' '
	cgit_rc robrc "url=rob/HEAD" >tmp &&
	grep "^Status: 200" tmp &&
	strip_headers <tmp >head &&
	echo "ref: refs/heads/master" >expect &&
	test_cmp expect head &&
	git init -q --bare --ref-format=reftable -b trunk rt.git &&
	git -C repos/rob push -q "$PWD/rt.git" master:trunk &&
	cgitrc_repo rtrc rt "repo.path=$PWD/rt.git" &&
	cgit_rc rtrc "url=rt/HEAD" >tmp &&
	strip_headers <tmp >head &&
	echo "ref: refs/heads/trunk" >expect &&
	test_cmp expect head &&
	cgit_rc emptyrc "url=empty/HEAD" >tmp &&
	strip_headers <tmp >head &&
	echo "ref: refs/heads/master" >expect &&
	test_cmp expect head
'

test_expect_success 'a reftable repository shows its age on the index' '
	cgit_rc rtrc "url=" >tmp &&
	grep "<td class=.col-idle.><time " tmp
'

# A client that goes away mid-page leaves nobody to send an error page to,
# so the request ends quietly instead of dying twice into the log. The page
# has to outgrow the pipe for the write after the reader has gone to fail.
test_expect_success 'a client that disconnects ends the request quietly' '
	(
		cd repos/rob &&
		awk "BEGIN{for(i=0;i<20000;i++) print \"line \" i}" >long.txt &&
		git add long.txt &&
		git commit -m long
	) &&
	{ cgit_rc robrc "url=rob/tree/long.txt" 2>err; echo $? >status; } | head -c 1 >/dev/null &&
	test "$(cat status)" = 0 &&
	! grep -i "broken pipe" err &&
	! grep "die()" err
'

# A page an auth filter let a visitor see is theirs alone, so a cache
# shared with other visitors has to be told, while a site without a filter
# keeps its pages free of any such header.
test_expect_success 'pages behind an auth filter are marked private' '
	write_script letin.sh <<-\EOF &&
	exit 1
	EOF
	{
		echo "auth-filter=exec:$PWD/letin.sh" &&
		cat robrc
	} >letinrc &&
	cgit_rc letinrc "url=rob/log/" >tmp &&
	grep "^Status: 200" tmp &&
	grep "^Cache-Control: private$" tmp &&
	grep "^Vary: Cookie$" tmp &&
	cgit_rc robrc "url=rob/log/" >tmp &&
	! grep "^Cache-Control" tmp &&
	! grep "^Vary" tmp
'

# A repository without a readme sends its about page to the summary, and
# the branch asked for has to survive that hop.
test_expect_success 'the about redirect keeps the query string' '
	git -C repos/rob branch other HEAD &&
	cgit_rc robrc "url=rob/about&h=other&x=1" >tmp &&
	grep "^Status: 302" tmp &&
	grep "^Location: /rob/?h=other&x=1$" tmp &&
	cgit_rc aboutrc "url=rob/about&h=other" >tmp &&
	grep "^Status: 200" tmp
'

# A readme named without a branch is read from the head being browsed, and an
# annotated tag reaches its commit only through the tag object.
test_expect_success 'the readme follows an annotated tag as the head' '
	git -C repos/rob tag -a -m release v1 HEAD &&
	{
		cat robrc &&
		echo "repo.readme=:file-1"
	} >tagreadmerc &&
	cgit_rc tagreadmerc "url=rob/about/&h=v1" >tmp &&
	grep "^Status: 200" tmp &&
	cgit_rc tagreadmerc "url=rob/tree/&h=v1" >tmp &&
	grep ">about<" tmp
'

test_expect_success 'the about redirect encodes the repository url once' '
	cgit_url "foo%2Bbar/about/" >tmp &&
	grep "^Status: 302" tmp &&
	grep "^Location: /foo%2Bbar/$" tmp
'

test_expect_success 'a symlink whose target is a large blob is listed without it' '
	big=$(head -c 5000 /dev/zero | tr "\0" a | git -C repos/rob hash-object -w --stdin) &&
	(
		cd repos/rob &&
		git update-index --add --cacheinfo 120000,$big,biglink &&
		git commit -m biglink
	) &&
	cgit_rc robrc "url=rob/tree/" >tmp &&
	grep "biglink" tmp &&
	! grep "aaaaaaaaaa" tmp
'

test_expect_success 'a chain of single directories is followed a bounded number of levels' '
	(
		cd repos/rob &&
		deep=$(printf "d/%.0s" $(seq 1 40))leaf &&
		mkdir -p $(dirname $deep) &&
		echo x >$deep &&
		git add d &&
		git commit -m deep
	) &&
	cgit_rc robrc "url=rob/tree/" >tmp &&
	test $(grep -o "class=.ls-dir." tmp | wc -l) -le 17
'

# The line has to carry the read error rather than the flag ferror returns.
# A system may open a directory and fail the read, or refuse the open, so the
# same error text is expected from either path.
test_expect_success 'an unreadable project list is named with its error' '
	mkdir -p projdir &&
	{
		echo "virtual-root=/" &&
		echo "cache-size=0" &&
		echo "project-list=$PWD/projdir" &&
		echo "scan-path=$PWD/repos"
	} >projrc &&
	cgit_rc projrc "url=" >tmp 2>err &&
	grep "project list .*projdir: Is a directory" err
'

test_expect_success SANITY 'a scan entry that cannot be searched is named in full' '
	mkdir -p scanperm/locked &&
	test_when_finished "chmod 755 scanperm/locked" &&
	chmod 644 scanperm/locked &&
	{
		echo "virtual-root=/" &&
		echo "cache-size=0" &&
		echo "scan-path=$PWD/scanperm"
	} >scanpermrc &&
	cgit_rc scanpermrc "url=" >tmp 2>err &&
	grep "Unable to stat .*scanperm/locked/objects: Permission denied" err
'

# A readme past max-blob-size is never read, so the about page says why it
# has nothing to show.
test_expect_success 'a readme past max-blob-size is reported on the about page' '
	test_seq 1 1000 >repos/rob/big-readme &&
	git -C repos/rob add big-readme &&
	git -C repos/rob commit -q -m "big readme" &&
	{
		echo "max-blob-size=1" &&
		cat robrc &&
		echo "repo.readme=:big-readme"
	} >bigreadmerc &&
	cgit_rc bigreadmerc "url=rob/about/" >tmp &&
	grep "The readme is larger than max-blob-size (1 KB)" tmp
'

# The chrome names a pinned commit in the title, and on an error page the id
# that was just refused must not be looked up to get there, since the wider
# revision syntax walks the whole history for a match.
test_expect_success 'the error page does not resolve the id it refused' '
	cgit_rc robrc "url=rob/log/&id=$sha" >tmp &&
	grep "<title>.* @ " tmp &&
	cgit_rc robrc "url=rob/log/&id=%3A/commit" >tmp &&
	grep "^Status: 400" tmp &&
	! grep "<title>.* @ " tmp
'

# A pushed date or zone outside what git's date code accepts used to end the
# summary, refs and log pages inside git. Each is now shown as the epoch or
# as UTC, the way git's own log shows them.
test_expect_success 'odd dates and zones in pushed objects render' '
	test_create_repo repos/dates &&
	(
		cd repos/dates &&
		test_commit base &&
		c=$(git rev-parse HEAD) &&
		t=$(printf "object %s\\ntype commit\\ntag early\\ntagger E <e@x> 1 -0100\\n\\nearly\\n" $c |
			git hash-object -t tag -w --stdin) &&
		git update-ref refs/tags/early $t &&
		tree=$(git rev-parse HEAD^{tree}) &&
		far=$(printf "tree %s\\nauthor A <a@x> 9223372036854775808 +0000\\ncommitter A <a@x> 9223372036854775808 +0000\\n\\nfar\\n" $tree |
			git hash-object -t commit -w --literally --stdin) &&
		git update-ref refs/heads/far $far &&
		zone=$(printf "tree %s\\nauthor A <a@x> 1700000000 -2147483648\\ncommitter A <a@x> 1700000000 +99999999999\\n\\nzone\\n" $tree |
			git hash-object -t commit -w --literally --stdin) &&
		git update-ref refs/heads/zone $zone
	) &&
	cgitrc_repo datesrc dates &&
	for q in "url=dates/" "url=dates/refs/" "url=dates/tag/&h=early" \
		"url=dates/log/&h=far" "url=dates/commit/&h=far" "url=dates/commit/&h=zone" \
		"url=dates/atom/&h=far"
	do
		cgit_rc datesrc "$q" >tmp 2>err &&
		grep "^Status: 200" tmp &&
		! grep "Unable to complete" tmp &&
		! grep "Timestamp" err || return 1
	done &&
	cgit_rc datesrc "url=dates/commit/&h=far" >tmp &&
	grep "1970-01-01" tmp
'

# A notes ref a pusher pointed at something other than a tree made git die on
# loading it, which took every page of the repository down with it.
test_expect_success 'a notes ref that names no tree is passed over' '
	blob=$(echo not-a-tree | git -C repos/dates hash-object -w --stdin) &&
	git -C repos/dates update-ref refs/notes/commits $blob &&
	git -C repos/dates update-ref refs/notes/signatures/tar $blob &&
	{
		echo "snapshots=tar" &&
		cat datesrc
	} >notesrc &&
	for q in "url=dates/" "url=dates/log/" "url=dates/refs/" "url=dates/tree/" \
		"url=dates/snapshot/dates-base.tar.asc"
	do
		cgit_rc notesrc "$q" >tmp 2>err &&
		! grep "Unable to complete" tmp &&
		! grep "notes tree" err || return 1
	done &&
	grep "^Status: 404" tmp
'

# A scanned repository names its own default branch, which the index stats
# below the repository to date it, so the name is held to what a ref may be.
test_expect_success 'a scanned defbranch cannot name a path outside the repository' '
	mkdir -p secret &&
	touch -t 200001010000 secret/file &&
	echo "defbranch=../../../../secret/file" >scan/b.git/cgitrc &&
	cgit_rc gitcfgrc "url=" >tmp &&
	grep ">b.git</a>" tmp &&
	! grep "data-ut=.946" tmp
'

test_done