# Copyright (C) 2009, 2011-2012 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.

# LF vs. CRLF line endings

. $srcdir/test-lib.sh

require gnu_diff
require sed
use_local_patch
use_tmpdir

lf2crlf() {
    while read l; do printf "%s\r\n" "$l"; done
}

echo 1 > a
echo 1b > b

diff a b | lf2crlf > ab.diff
echo 1 > c
check 'patch c < ab.diff' <<EOF
(Stripping trailing CRs from patch; use --binary to disable.)
patching file c
EOF

diff -c a b | lf2crlf > ab.diff
echo 1 > c
check 'patch c < ab.diff' <<EOF
(Stripping trailing CRs from patch; use --binary to disable.)
patching file c
EOF

diff -u a b | lf2crlf > ab.diff
echo 1 > c
check 'patch c < ab.diff' <<EOF
(Stripping trailing CRs from patch; use --binary to disable.)
patching file c
EOF

if ! have_ed ; then
    echo "The ed utility is not available; skipping ed related tests"
else
    diff -e a b > ab.ed | lf2crlf > ab.ed
    echo 1 > c
    ncheck 'patch c < ab.ed'
fi

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

echo 1 | lf2crlf > a
echo 1b | lf2crlf > b

diff a b > ab.diff
cp a c
check 'patch c < ab.diff' <<EOF
patching file c
EOF

check 'cat -ve c' <<EOF
1b^M$
EOF

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

diff -u a b > ab.diff
cp a c
check 'patch c < ab.diff' <<EOF
patching file c
EOF

check 'cat -ve c' <<EOF
1b^M$
EOF

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

diff -c a b > ab.diff
cp a c
check 'patch c < ab.diff' <<EOF
patching file c
EOF

check 'cat -ve c' <<EOF
1b^M$
EOF

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

if ! have_ed ; then
    echo "The ed utility is not available; skipping ed related tests"
else
    diff -e a b > ab.diff
    cp a c
    ncheck 'patch c < ab.diff'
fi

check 'cat -ve c' <<EOF
1b^M$
EOF

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

echo 1 > a
echo 1b > b

diff a b | lf2crlf > ab.diff
cp a c

check 'patch --binary c < ab.diff || echo status: $?' <<EOF
patching file c
Hunk #1 FAILED at 1 (different line endings).
1 out of 1 hunk FAILED -- saving rejects to file c.rej
status: 1
EOF

check 'patch c < ab.diff' <<EOF
(Stripping trailing CRs from patch; use --binary to disable.)
patching file c
EOF

check 'cat -ve c' <<EOF
1b$
EOF

lf2crlf < a > c
check 'patch --binary c < ab.diff' <<EOF
patching file c
EOF

check 'cat -ve c' <<EOF
1b^M$
EOF

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

diff -u a b | lf2crlf > ab.diff
cp a c
check 'patch c < ab.diff' <<EOF
(Stripping trailing CRs from patch; use --binary to disable.)
patching file c
EOF

check 'cat -ve c' <<EOF
1b$
EOF

lf2crlf < a > c
check 'patch --binary c < ab.diff' <<EOF
patching file c
EOF

check 'cat -ve c' <<EOF
1b^M$
EOF

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

diff -c a b | lf2crlf > ab.diff
cp a c
check 'patch c < ab.diff' <<EOF
(Stripping trailing CRs from patch; use --binary to disable.)
patching file c
EOF

check 'cat -ve c' <<EOF
1b$
EOF

lf2crlf < a > c
check 'patch --binary c < ab.diff' <<EOF
patching file c
EOF

check 'cat -ve c' <<EOF
1b^M$
EOF

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

# NOTE: ed does not fix up CRLF mangled input, so mangled ed-style
# patches will break.  (We could fix up things in patch and pipe
# the result to ed, but this is not what we do so far.)

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

# Line endings of @@ lines are not used for guessing if a patch needs CR
# stripping: if the -p / --show-c-function option of GNU diff is used, these
# lines can have different line endings than the rest of the patch.

echo 1 > a
echo 2 > b
diff -u a b | sed -e 's,@@$,@@ context\r,' > ab.diff

echo 1 > c
check 'patch c < ab.diff' <<EOF
patching file c
EOF

check 'cat -ve c' <<EOF
2$
EOF