[PATCH v6 2/6] t0060: Add test for prefix_path on symlinks via absolute paths

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When symlinks in the working tree are manipulated using the absolute
path, git dereferences them, and tries to manipulate the link target
instead.

This applies to most high-level commands but prefix_path is the common
denominator for all of them.

Add a known-breakage tests using the prefix_path function, which
currently uses real_path, causing the dereference.

Signed-off-by: Martin Erik Werner <martinerikwerner@xxxxxxxxx>
Reviewed-by: Duy Nguyen <pclouds@xxxxxxxxx>
---
 t/t0060-path-utils.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/t/t0060-path-utils.sh b/t/t0060-path-utils.sh
index 07c10c8..0bba988 100755
--- a/t/t0060-path-utils.sh
+++ b/t/t0060-path-utils.sh
@@ -190,6 +190,11 @@ test_expect_success SYMLINKS 'real path works on symlinks' '
 	test "$sym" = "$(test-path-utils real_path "$dir2/syml")"
 '
 
+test_expect_failure SYMLINKS 'prefix_path works with absolute paths to work tree symlinks' '
+	ln -s target symlink &&
+	test "$(test-path-utils prefix_path prefix "$(pwd)/symlink")" = "symlink"
+'
+
 relative_path /foo/a/b/c/	/foo/a/b/	c/
 relative_path /foo/a/b/c/	/foo/a/b	c/
 relative_path /foo/a//b//c/	///foo/a/b//	c/		POSIX
-- 
1.8.5.2

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