#!/bin/sh

# The patch page serves mail ready patches, compared line for line against
# git format-patch for a single commit, the root commit, a range and a
# renamed file, once the CGI headers are stripped. Further checks cover the
# headers, max-patch-count, a path, a merge in a range, the signature and the
# format used when addresses are hidden.

test_description='Check content on patch page'
. ./setup.sh

# The signature sits on the second-to-last line, above the trailing blank,
# and names the version only when enable-version-info asks for it.
check_cgit_signature() {
	tail -n 2 tmp | head -n 1 | grep -x -F "cgit${1:+ $1}"
}

test_expect_success 'a commit is patched as git format-patch writes it' '
	cgit_ok_url "foo/patch" >tmp &&
	git -C repos/foo format-patch --subject-prefix="" \
		--signature="cgit" --stdout HEAD^ >expect &&
	strip_headers <tmp >actual &&
	test_cmp expect actual
'

# A commit is named as the range from its parent, which the root commit lacks.
test_expect_success 'the patch is plain text named after the commit' '
	id=$(git -C repos/foo rev-parse HEAD) &&
	parent=$(git -C repos/foo rev-parse HEAD~1) &&
	cgit_ok_url "foo/patch" >tmp &&
	sed "/^$/q" tmp >headers &&
	grep "^Content-Type: text/plain" headers &&
	grep "^Content-Disposition: inline; filename=\"$parent..$id.patch\"$" headers
'

test_expect_success 'the root commit is patched whole' '
	root=$(git -C repos/foo rev-list --max-parents=0 HEAD) &&
	cgit_ok_url "foo/patch&id=$root" >tmp &&
	git -C repos/foo format-patch --root -1 --subject-prefix="" \
		--signature="cgit" --stdout "$root" >expect &&
	strip_headers <tmp >actual &&
	test_cmp expect actual &&
	sed "/^$/q" tmp >headers &&
	grep "^Content-Disposition: inline; filename=\"$root.patch\"$" headers
'

test_expect_success 'a range matches git format-patch and names the range' '
	id=$(git -C repos/foo rev-parse HEAD) &&
	id2=$(git -C repos/foo rev-parse HEAD~3) &&
	cgit_ok_url "foo/patch&id=$id&id2=$id2" >tmp &&
	git -C repos/foo format-patch --subject-prefix="" \
		-N --signature="cgit" --stdout HEAD~3..HEAD >expect &&
	strip_headers <tmp >actual &&
	test_cmp expect actual &&
	sed "/^$/q" tmp >headers &&
	grep "^Content-Disposition: inline; filename=\"$id2..$id.patch\"$" headers
'

# git cuts the walk short before it reverses it, so the newest commits are
# the ones kept.
test_expect_success 'max-patch-count keeps the newest commits of a range' '
	root=$(git -C repos/foo rev-list --max-parents=0 HEAD) &&
	cgitrc_repo patchcountrc foo max-patch-count=2 &&
	cgit_ok patchcountrc "url=foo/patch&id2=$root" >tmp &&
	grep "^Subject: " tmp >actual &&
	test_write_lines "Subject: commit 4" "Subject: commit 5" >expect &&
	test_cmp expect actual
'

# The range below holds one commit more than the default bound.
test_expect_success 'max-patch-count defaults to 50 and 0 lifts it' '
	mkrepo repos/many 52 >/dev/null &&
	root=$(git -C repos/many rev-list --max-parents=0 HEAD) &&
	cgitrc_repo manyrc many &&
	cgit_ok manyrc "url=many/patch&id2=$root" >tmp &&
	test $(grep -c "^From [0-9a-f]* Mon Sep 17 00:00:00 2001$" tmp) -eq 50 &&
	cgitrc_repo manyrc many max-patch-count=0 &&
	cgit_ok manyrc "url=many/patch&id2=$root" >tmp &&
	test $(grep -c "^From [0-9a-f]* Mon Sep 17 00:00:00 2001$" tmp) -eq 51
'

test_expect_success 'a path limits a range to the commits touching it' '
	id2=$(git -C repos/foo rev-parse HEAD~3) &&
	cgit_ok_url "foo/patch/file-4&id2=$id2" >tmp &&
	grep "^Subject: " tmp >actual &&
	test_write_lines "Subject: commit 4" >expect &&
	test_cmp expect actual &&
	grep "^(limited to .file-4.)$" tmp &&
	! grep "file-5" tmp
'

# A merge has no single patch to give, so it drops out of a range, signature
# and all, while the commits it brought in stay.
test_expect_success 'a merge drops out of a range' '
	mkrepo repos/merged 1 &&
	(
		cd repos/merged &&
		git checkout -b side &&
		echo side >side.txt &&
		git add side.txt &&
		git commit -m side &&
		git checkout - &&
		echo main >main.txt &&
		git add main.txt &&
		git commit -m main &&
		git merge --no-ff -m merge side
	) &&
	root=$(git -C repos/merged rev-list --max-parents=0 HEAD) &&
	cgitrc_repo mergedrc merged &&
	cgit_ok mergedrc "url=merged/patch&id2=$root" >tmp &&
	git -C repos/merged format-patch --subject-prefix="" \
		-N --signature="cgit" --stdout "$root..HEAD" >expect &&
	strip_headers <tmp >actual &&
	test_cmp expect actual &&
	grep "^Subject: side$" actual &&
	grep "^Subject: main$" actual
'

# The version comes from the build, less the v of the tag, as git writes its
# own.
test_expect_success 'the signature names the version when asked to' '
	version=$(sed -n "s/^CGIT_VERSION = v\{0,1\}//p" "$TEST_OUTPUT_DIRECTORY/../build/VERSION") &&
	test -n "$version" &&
	cgitrc_copy versionrc enable-version-info=1 &&
	cgit_ok versionrc "url=foo/patch" >tmp &&
	check_cgit_signature "$version"
'

# Without plain email the patch is written from a format of cgit's own, whose
# From line carries the name alone.
test_expect_success 'enable-plain-email=0 leaves the address off the patch' '
	cgitrc_copy plainrc enable-plain-email=0 &&
	cgit_ok plainrc "url=foo/patch" >tmp &&
	grep "^From: A U Thor$" tmp &&
	grep "^Subject: commit 5$" tmp &&
	! grep "author@example.com" tmp
'

# The old name of a file renamed in the commit joins the limit, so the patch
# carries the rename rather than a file added whole. It matches git given both
# names, but for the note naming the limit.
test_expect_success 'a renamed file is patched as the rename' '
	mkrepo_renamed repos/moved &&
	cgitrc_repo movedrc moved &&
	cgit_ok movedrc "url=moved/patch/new.txt" >tmp &&
	git -C repos/moved format-patch -1 -M --subject-prefix="" \
		--signature="cgit" --stdout HEAD -- new.txt old.txt >expect &&
	strip_headers <tmp >body &&
	sed "/^(limited to .new.txt.)$/,/^$/d" body >actual &&
	test_cmp expect actual &&
	grep "^similarity index 100%$" actual &&
	grep "^rename from old.txt$" actual
'

test_done