# gnu-patch-test: test for a version of (GNU) patch that accepts the --posix switch
#
################################################################
## Copyright (C) 2004 Andreas Fuchs
# 
# See the file "COPYING" for further information about
# the copyright and warranty status of this work.
# 

if test $# -eq 0 ; then

  diff_option_name=
  diff3_option_name=
  PATCHPROG=patch

elif test $# -eq 1 ; then

  patch_option_name="$1"
  PATCHPROG="`$srcdir/build-tools/scripts/option \"$patch_option_name\"`"

else

  printf "config script error in %s\n" "$0" 1>&2
  printf "usage: library-test [patch-option-name]\n" 1>&2
  exit 1

fi

CMP='cmp'    # we require a working 'cmp' utility
TMPDIR="/tmp/,patch-test.$$"

ORIG_A="$TMPDIR/to-patch_a"
ORIG_PRISTINE_A="$TMPDIR/to-patch_a.the-original"
PATCHED_A="$TMPDIR/patched_a"
EXPECTED_A="$TMPDIR/expected_a"
PATCH_A="$TMPDIR/patch_a"

ORIG_B="$TMPDIR/to-patch_b"
ORIG_PRISTINE_B="$TMPDIR/to-patch_b.the-original"
PATCHED_B="$TMPDIR/patched_b"
EXPECTED_B="$TMPDIR/expected_b"
PATCH_B="$TMPDIR/patch_b"

## set up files we need

mkdir "$TMPDIR"

for i in "$ORIG_A" "$ORIG_B"; do
    cat >"$i" <<EOF
bla
bla
bla
blub
EOF
done

cp "$ORIG_A" "$ORIG_PRISTINE_A"
cp "$ORIG_B" "$ORIG_PRISTINE_B"


cat >"$EXPECTED_A" <<EOF
bla
bla
blaubaaa
blub
EOF

cp "$ORIG_B" "$EXPECTED_B"
printf "bla" >>"$EXPECTED_B"

cat >"$PATCH_A" <<EOF
--- label_a
+++ label_b
@@ -1,4 +1,4 @@
 bla
 bla
-bla
+blaubaaa
 blub
EOF

cat >"$PATCH_B" <<EOF
--- label_a
+++ label_b
@@ -2,3 +2,4 @@
 bla
 bla
 blub
+bla
\ No newline at end of file
EOF

testresults () {
    ORIG="$1"
    PATCHED="$2"
    EXPECTED="$3"
    PRISTINE="$4"
    PATCH="$5"

    if "$PATCHPROG" --forward -f -s --posix -i "$PATCH" -o "$PATCHED" "$ORIG" 2>/dev/null ; then
	true
    else
	FAIL="yes"
    fi
    if "$CMP" "$PATCHED" "$EXPECTED" 2>/dev/null >/dev/null ; then
	true
    else
	FAIL="yes"
    fi
    if "$CMP" "$ORIG" "$PRISTINE" 2>/dev/null >/dev/null ; then
	true
    else
	FAIL="yes"
    fi
}


FAIL=""
if [ -x "`which "$PATCHPROG"  2>/dev/null`" ] ; then
    
    testresults "$ORIG_A" "$PATCHED_A" "$EXPECTED_A" "$ORIG_PRISTINE_A" "$PATCH_A"
    testresults "$ORIG_B" "$PATCHED_B" "$EXPECTED_B" "$ORIG_PRISTINE_B" "$PATCH_B"
    
    if [ x"$FAIL" = x ] ; then
	echo "$PATCHPROG"
	rm -rf "$TMPDIR"
	exit 0
    fi
fi

rm -rf "$TMPDIR"

printf "\n" 1>&2
printf "The configured version of patch does not handle the --posix switch\n" 1>&2
printf "correctly.\n" 1>&2
printf "\n" 1>&2
printf "  configured patch = %s.\n" "$PATCHPROG" 1>&2
printf "\n" 1>&2

if test ! -z "$patch_option_name" ; then
  printf "\n" 1>&2
  printf "Use config options\n  --with-%s PROG\n" "$patch_option_name" 1>&2
  printf "\n" 1>&2
  printf "  NOTE: You will want to grab a recent version of the GNU patch\n" 1>&2
  printf "   distribution.  On BSD systems, you can just install the\n" 1>&2
  printf "   devel/patch port or package.\n" 1>&2
  printf "\n" 1>&2
fi

exit 1


# arch-tag: Andreas Fuchs Sun Jan 25 02:12:45 2004 (auto-conf-lib/gnu-patch-test)
#