Adding upstream version 0.2.upstream/0.2

Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>

1 files changed, 171 insertions, 0 deletions

diff --git a/zdiff.in b/zdiff.in
new file mode 100644
index 0000000..4be41d8
--- /dev/null
+++ b/zdiff.in
@@ -0,0 +1,171 @@
+#! /bin/sh
+# Zdiff - Diff/cmp wrapper for compressed files.
+# Copyright (C) 2008, 2009 Antonio Diaz Diaz.
+#
+# This script is free software: you have unlimited permission
+# to copy, distribute and modify it.
+
+LC_ALL=C
+export LC_ALL
+invocation_name=$0
+args=
+default_ext=.lz
+diff_prog=diff
+file1=
+file2=
+
+# Loop over args
+while [ x"$1" != x ] ; do
+
+	case "$1" in
+	--help | --he* | -h)
+		echo "Zdiff - Diff/cmp wrapper for compressed files."
+		echo
+		echo "Zdiff is a wrapper script around the diff and cmp commands that allows"
+		echo "transparent comparison of any combination of compressed and"
+		echo "non-compressed files. If any given file is compressed, its uncompressed"
+		echo "content is used. The supported compressors are gzip, bzip2, lzip and xz."
+		echo
+		echo "Zcmp is a shortcut for \"zdiff --cmp\""
+		echo
+		echo "Usage: ${invocation_name} [OPTIONS] [DIFF_OPTIONS] FILE1 [FILE2]"
+		echo
+		echo "Compares FILE1 to FILE2. If FILE2 is omitted, compares FILE1 to the"
+		echo "uncompressed contents of FILE1.[gz|bz2|lz] (depending on the default"
+		echo "compressor selected). DIFF_OPTIONS are passed directly to diff or cmp."
+		echo "The exit status from diff or cmp is preserved."
+		echo
+		echo "Options:"
+		echo "  -h, --help          display this help and exit"
+		echo "  -V, --version       output version information and exit"
+		echo "      --gzip          use gzip as default decompressor"
+		echo "      --bzip2         use bzip2 as default decompressor"
+		echo "      --lzip          use lzip as default decompressor (default)"
+		echo "      --xz            use xz as default decompressor"
+		echo "      --diff          use diff to compare files (default)"
+		echo "      --cmp           use cmp to compare files"
+		echo
+		echo "Report bugs to lzip-bug@nongnu.org"
+		echo "Lzip home page: http://www.nongnu.org/lzip/lzip.html"
+		exit 0 ;;
+	--version | --ve* | -V)
+		echo "Zdiff VERSION"
+		echo "Copyright (C) 2009 Antonio Diaz Diaz."
+		echo "This script is free software: you have unlimited permission"
+		echo "to copy, distribute and modify it."
+		exit 0 ;;
+	--gz*)
+		default_ext=.gz ;;
+	--bz*)
+		default_ext=.bz2 ;;
+	--lz*)
+		default_ext=.lz ;;
+	--xz*)
+		default_prog=xz ;;
+	--diff)
+		diff_prog=diff ;;
+	--cmp)
+		diff_prog=cmp ;;
+	-)
+		echo "${invocation_name}: reading from stdin not supported"
+		exit 1 ;;
+	--)
+		shift; break ;;
+	-?*)
+		args="${args} $1" ;;
+	*)
+		break ;;
+	esac
+	shift
+done
+
+# Loop over files
+while [ x"$1" != x ] ; do
+	if [ "$1" != "--" ] ; then
+		if test -f "$1"; then
+			if test -z "${file1}"; then file1="$1"
+			else
+				if test -z "${file2}"; then file2="$1"
+				else
+					echo "${invocation_name}: Too many files; use --help for usage." 1>&2
+				fi
+			fi
+		else
+			echo "${invocation_name}: File \"$1\" not found or not a regular file" 1>&2
+			exit 1
+		fi
+	fi
+	shift
+done
+
+if test -z "${file1}"; then
+	echo "${invocation_name}: No files given; use --help for usage." 1>&2
+	exit 1
+fi
+
+if test -z "${file2}"; then
+	case "${file1}" in
+	*.gz)
+		file2=`printf "%s" "${file1}" | sed 's/.gz$//'` ;;
+	*.tgz)
+		file2=`printf "%s" "${file1}" | sed 's/tgz$/tar/'` ;;
+	*.bz2)
+		file2=`printf "%s" "${file1}" | sed 's/.bz2$//'` ;;
+	*.tbz)
+		file2=`printf "%s" "${file1}" | sed 's/tbz$/tar/'` ;;
+	*.tbz2)
+		file2=`printf "%s" "${file1}" | sed 's/tbz2$/tar/'` ;;
+	*.lz)
+		file2=`printf "%s" "${file1}" | sed 's/.lz$//'` ;;
+	*.tlz)
+		file2=`printf "%s" "${file1}" | sed 's/tlz$/tar/'` ;;
+	*.xz)
+		file2=`printf "%s" "${file1}" | sed 's/.xz$//'` ;;
+	*.txz)
+		file2=`printf "%s" "${file1}" | sed 's/txz$/tar/'` ;;
+	*)
+		file2="${file1}${default_ext}" ;;
+	esac
+fi
+
+prog1=
+prog2=
+case "${file1}" in
+*.gz | *.tgz)		prog1=gzip ;;
+*.bz2 | *.tbz | *.tbz2)	prog1=bzip2 ;;
+*.lz | *.tlz)		prog1=lzip ;;
+*.xz | *.txz)		prog1=xz ;;
+esac
+case "${file2}" in
+*.gz | *.tgz)		prog2=gzip ;;
+*.bz2 | *.tbz | *.tbz2)	prog2=bzip2 ;;
+*.lz | *.tlz)		prog2=lzip ;;
+*.xz | *.txz)		prog2=xz ;;
+esac
+
+retval=0
+if test -n "${prog1}"; then
+	if test -n "${prog2}"; then
+		tmp_file=`mktemp "${TMPDIR:-/tmp}"/zdiff.XXXXXXXXXX` || {
+			echo 'cannot create a temporary file' 1>&2
+			exit 1
+		}
+		${prog2} -cdfq -- "${file2}" > "${tmp_file}" || exit 1
+		${prog1} -cdfq -- "${file1}" | ${diff_prog} ${args} - -- "${tmp_file}"
+		retval=$?
+		rm -f "${tmp_file}" || retval=$?
+	else
+		${prog1} -cdfq -- "${file1}" | ${diff_prog} ${args} - -- "${file2}"
+		retval=$?
+	fi
+else
+	if test -n "${prog2}"; then
+		${prog2} -cdfq -- "${file2}" | ${diff_prog} ${args} -- "${file1}" -
+		retval=$?
+	else
+		${diff_prog} ${args} -- "${file1}" "${file2}"
+		retval=$?
+	fi
+fi
+
+exit ${retval}