git/t/t4011-diff-symlink.sh
Johannes Schindelin 418566b6fd Fix 'git diff --no-index' with a non-existing symlink target
When trying to find out mode changes, we should not access the symlink
targets using stat(); instead we use lstat() so that the diff does
not fail trying to find a non-existing symlink target.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-30 21:11:24 -08:00

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#!/bin/sh
#
# Copyright (c) 2005 Johannes Schindelin
#
test_description='Test diff of symlinks.
'
. ./test-lib.sh
. "$TEST_DIRECTORY"/diff-lib.sh
cat > expected << EOF
diff --git a/frotz b/frotz
new file mode 120000
index 0000000..7c465af
--- /dev/null
+++ b/frotz
@@ -0,0 +1 @@
+xyzzy
\ No newline at end of file
EOF
test_expect_success \
'diff new symlink' \
'ln -s xyzzy frotz &&
git update-index &&
tree=$(git write-tree) &&
git update-index --add frotz &&
GIT_DIFF_OPTS=--unified=0 git diff-index -M -p $tree > current &&
compare_diff_patch current expected'
test_expect_success \
'diff unchanged symlink' \
'tree=$(git write-tree) &&
git update-index frotz &&
test -z "$(git diff-index --name-only $tree)"'
cat > expected << EOF
diff --git a/frotz b/frotz
deleted file mode 120000
index 7c465af..0000000
--- a/frotz
+++ /dev/null
@@ -1 +0,0 @@
-xyzzy
\ No newline at end of file
EOF
test_expect_success \
'diff removed symlink' \
'rm frotz &&
git diff-index -M -p $tree > current &&
compare_diff_patch current expected'
cat > expected << EOF
diff --git a/frotz b/frotz
EOF
test_expect_success \
'diff identical, but newly created symlink' \
'sleep 3 &&
ln -s xyzzy frotz &&
git diff-index -M -p $tree > current &&
compare_diff_patch current expected'
cat > expected << EOF
diff --git a/frotz b/frotz
index 7c465af..df1db54 120000
--- a/frotz
+++ b/frotz
@@ -1 +1 @@
-xyzzy
\ No newline at end of file
+yxyyz
\ No newline at end of file
EOF
test_expect_success \
'diff different symlink' \
'rm frotz &&
ln -s yxyyz frotz &&
git diff-index -M -p $tree > current &&
compare_diff_patch current expected'
test_expect_success \
'diff symlinks with non-existing targets' \
'ln -s narf pinky &&
ln -s take\ over brain &&
test_must_fail git diff --no-index pinky brain > output 2> output.err &&
grep narf output &&
! grep error output.err'
test_done