# Copyright (C) 2010-2012 Free Software Foundation, Inc.
#
# Copying and distribution of this file, with or without modification,
# in any medium, are permitted without royalty provided the copyright
# notice and this notice are preserved.

# Symlink related tests

. $srcdir/test-lib.sh

require_cat
use_local_patch
use_tmpdir

# ==============================================================

cat > create.diff <<EOF
--- /dev/null
+++ l
@@ -0,0 +1 @@
+one
EOF

rm -f f l
echo f > f
ncheck 'ln -s f l'

check 'patch < create.diff || echo "Status: $?"' <<EOF
File l is not a regular file -- can't patch
1 out of 1 hunk ignored -- saving rejects to file l.rej
Status: 1
EOF

check 'cat f' <<EOF
f
EOF

# --------------------------------------------------------------

rm -f f l
echo f > f
ncheck 'ln -s f l'

cat > modify.diff <<EOF
--- l
+++ l
@@ -1 +1 @@
-one
+two
EOF

check 'patch < modify.diff || echo "Status: $?"' <<EOF
File l is not a regular file -- can't patch
1 out of 1 hunk ignored -- saving rejects to file l.rej
Status: 1
EOF
# --------------------------------------------------------------

rm -f f l
echo f > f
ncheck 'ln -s f l'

cat > delete.diff <<EOF
--- l
+++ /dev/null
@@ -1 +0,0 @@
-one
EOF

check 'patch < delete.diff || echo "Status: $?"' <<EOF
File l is not a regular file -- can't patch
1 out of 1 hunk ignored -- saving rejects to file l.rej
Status: 1
EOF

# --------------------------------------------------------------

cat > create-symlink.diff <<EOF
diff --git a/symlink b/symlink
new file mode 120000
index 0000000..12a8d8a
--- /dev/null
+++ b/symlink
@@ -0,0 +1 @@
+target1
\ No newline at end of file
EOF

check 'patch -p1 < create-symlink.diff || echo "Status: $?"' <<EOF
patching symbolic link symlink
EOF

check 'echo a > target1 && cat symlink' <<EOF
a
EOF
check 'echo b > target1 && cat symlink' <<EOF
b
EOF
rm -f target1

cat > modify-symlink.diff <<EOF
diff --git a/symlink b/symlink
index 12a8d8a..3b7781e 120000
--- a/symlink
+++ b/symlink
@@ -1 +1 @@
-target1
\ No newline at end of file
+target2
\ No newline at end of file
EOF

check 'patch -p1 < modify-symlink.diff || echo "Status: $?"' <<EOF
patching symbolic link symlink
EOF

check 'echo a > target2 && cat symlink' <<EOF
a
EOF
check 'echo b > target2 && cat symlink' <<EOF
b
EOF
rm -f target2

cat > delete-symlink.diff <<EOF
diff --git a/symlink b/symlink
deleted file mode 120000
index 3b7781e..0000000
--- a/symlink
+++ /dev/null
@@ -1 +0,0 @@
-target2
\ No newline at end of file
EOF

check 'patch -p1 < delete-symlink.diff || echo "Status: $?"' <<EOF
patching symbolic link symlink
EOF

ncheck 'test ! -L symlink'

# --------------------------------------------------------------

# The backup file of a new symlink is an empty regular file.

check 'patch -p1 --backup < create-symlink.diff || echo "Status: $?"' <<EOF
patching symbolic link symlink
EOF

ncheck 'test -f symlink.orig && test ! -s symlink.orig'

# The backup file of a modified symlink is the old symlink.

check 'patch -p1 --backup < modify-symlink.diff || echo "Status: $?"' <<EOF
patching symbolic link symlink
EOF

check 'echo a > symlink.orig && cat target1' <<EOF
a
EOF
check 'echo b > symlink.orig && cat target1' <<EOF
b
EOF
rm -f target1

# The backup file of a deleted symlink is the old symlink.

check 'patch -p1 --backup < delete-symlink.diff || echo "Status: $?"' <<EOF
patching symbolic link symlink
EOF

check 'echo a > symlink.orig && cat target2' <<EOF
a
EOF
check 'echo b > symlink.orig && cat target2' <<EOF
b
EOF
rm -f target2

# --------------------------------------------------------------

# Delete and then recreate the same symlink: make sure the original
# symlink is backed up

ncheck 'ln -s target2 symlink'
rm -f symlink.orig

check 'cat delete-symlink.diff create-symlink.diff | patch -p1 --backup || echo "Status: $?"' <<EOF
patching symbolic link symlink
patching symbolic link symlink
EOF

check 'echo a > symlink.orig && cat target2' <<EOF
a
EOF
check 'echo b > symlink.orig && cat target2' <<EOF
b
EOF
rm -f target2