[PATCH] t7810: test git grep --no-index from a bare repository

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

From: Jonathan Nieder <jrnieder@gmail.com>

If git grep --no-index is to be a general-purpose replacement for
standard grep, then it should work even for examining the content of a
.git directory.  The current implementation has some problems:

 * .git/info/exclude is honored though it shouldn’t be
 * when run from within a .git directory, grep --no-index searches
   the entire .git directory instead of just directories below
   the current working directory.

The last few tests (which demonstrate that grep --no-index looks for
.git/info/exclude even when no repository is involved) are by Duy.
Any bugs in the other tests are my fault.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
---
 The original version. Good thing anyway, with or without tp/setup series.

 t/t7810-grep.sh |  116 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 116 insertions(+), 0 deletions(-)

diff --git a/t/t7810-grep.sh b/t/t7810-grep.sh
index 8a63227..7329433 100755
--- a/t/t7810-grep.sh
+++ b/t/t7810-grep.sh
@@ -494,6 +494,98 @@ test_expect_success 'inside git repository but with --no-index' '
 	)
 '
 
+test_expect_success 'set up bare repository' '
+
+	rm -fr bare &&
+	mkdir -p bare/basis/sub &&
+	echo hello >bare/basis/file1 &&
+	echo world >bare/basis/sub/file2 &&
+	echo ".*o*" >bare/basis/.gitignore &&
+	(
+		cd bare/basis &&
+		git init &&
+		git ls-files --other | git update-index --add --stdin &&
+		tree=$(git write-tree) &&
+		commit=$(printf "basis\n" | git commit-tree "$tree") &&
+		git update-ref -m init refs/heads/master "$commit" &&
+		git update-index --refresh &&
+		git diff-index --exit-code HEAD
+	) &&
+	git clone --no-checkout --bare bare/basis bare/d.git &&
+	mkdir -p bare/d.git/sub &&
+	echo olleh >bare/d.git/fich1 &&
+	echo dlrow >bare/d.git/sub/file2 &&
+	echo "file2" >bare/d.git/.gitignore &&
+	echo "o*" >>bare/d.git/.gitignore
+	{
+		echo "HEAD:.gitignore:.*o*" &&
+		echo HEAD:file1:hello &&
+		echo HEAD:sub/file2:world
+	} >bare/expect.full &&
+	: >bare/expect.empty &&
+	echo file2:dlrow >bare/expect.sub
+'
+
+test_expect_success 'in bare repo, grep without --no-index or --cached fails' '
+	(
+		cd bare/d.git &&
+		test_must_fail git grep o >../actual.plain 2>../actual.msg &&
+		grep "work tree" ../actual.msg &&
+		test_cmp ../expect.empty ../actual.plain &&
+		cd sub &&
+		test_must_fail git grep o >../../actual.sub 2>../../actual.msg &&
+		test_cmp ../../expect.empty ../../actual.sub &&
+		grep "work tree" ../../actual.msg
+	)
+'
+
+test_expect_success 'in bare repo, --cached and HEAD ignore working dir' '
+
+	(
+		cd bare/d.git &&
+		test_must_fail git grep --cached o >../actual.cached 2>../actual.msg &&
+		test_cmp ../expect.empty ../actual.cached &&
+		! grep fatal ../actual.msg &&
+		git grep -e o HEAD >../actual.full &&
+		test_cmp ../expect.full ../actual.full &&
+		cd sub &&
+		test_must_fail git grep o >../../actual.sub 2>../../actual.msg &&
+		test_cmp ../../expect.empty ../../actual.sub &&
+		git grep -e o HEAD >../../actual.full-sub &&
+		test_cmp ../../expect.full ../../actual.full-sub
+	)
+'
+
+test_expect_success '--no-index from a bare repository' '
+	rm -f bare/d.git/info/exclude &&
+	(
+		cd bare/d.git &&
+		git grep --no-index o >../actual.noindex &&
+		grep "^fich1:olleh\$" ../actual.noindex &&
+		grep "^.gitignore:o[*]\$" ../actual.noindex &&
+		! grep file2 ../actual.noindex
+	)
+'
+
+test_expect_failure '--no-index from a subdirectory of a bare repository' '
+	(
+		cd bare/d.git/sub &&
+		git grep --no-index o >../../actual.sub &&
+		test_cmp ../../expect.sub ../../actual.sub
+	)
+'
+
+test_expect_failure '--no-index neglects info/exclude in bare repo' '
+	echo "fich1" >bare/d.git/info/exclude &&
+	(
+		cd bare/d.git &&
+		git grep --no-index o >../actual.noindex &&
+		grep "^fich1:olleh\$" ../actual.noindex &&
+		grep "^.gitignore:o[*]\$" ../actual.noindex &&
+		! grep file2 ../actual.noindex
+	)
+'
+
 test_expect_success 'setup double-dash tests' '
 cat >double-dash <<EOF &&
 --
@@ -527,4 +619,28 @@ test_expect_success 'grep -e -- -- path' '
 	test_cmp expected actual
 '
 
+test_expect_success 'Setup fake .git' '
+	cd t &&
+	GIT_CEILING_DIRECTORIES="`pwd`" &&
+	export GIT_CEILING_DIRECTORIES &&
+	cd a &&
+	mkdir -p .git/info &&
+	cd ../..
+
+'
+
+test_expect_failure 'Ignore fake .git/info/exclude' '
+	(
+		cd t/a &&
+		echo v > .git/info/exclude &&
+		git grep --no-index vvv . &&
+		rm .git/info/exclude
+	)
+'
+
+test_expect_success 'Unsetup fake .git' '
+	rm -rf t/a &&
+	unset GIT_CEILING_DIRECTORIES
+'
+
 test_done
-- 
1.7.1.rc1.69.g24c2f7