Adding upstream version 0.2.
Signed-off-by: Daniel Baumann <daniel@debian.org>
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18 changed files with 2018 additions and 0 deletions
171
zdiff.in
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171
zdiff.in
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#! /bin/sh
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# Zdiff - Diff/cmp wrapper for compressed files.
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# Copyright (C) 2008, 2009 Antonio Diaz Diaz.
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#
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# This script is free software: you have unlimited permission
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# to copy, distribute and modify it.
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LC_ALL=C
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export LC_ALL
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invocation_name=$0
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args=
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default_ext=.lz
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diff_prog=diff
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file1=
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file2=
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# Loop over args
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while [ x"$1" != x ] ; do
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case "$1" in
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--help | --he* | -h)
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echo "Zdiff - Diff/cmp wrapper for compressed files."
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echo
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echo "Zdiff is a wrapper script around the diff and cmp commands that allows"
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echo "transparent comparison of any combination of compressed and"
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echo "non-compressed files. If any given file is compressed, its uncompressed"
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echo "content is used. The supported compressors are gzip, bzip2, lzip and xz."
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echo
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echo "Zcmp is a shortcut for \"zdiff --cmp\""
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echo
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echo "Usage: ${invocation_name} [OPTIONS] [DIFF_OPTIONS] FILE1 [FILE2]"
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echo
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echo "Compares FILE1 to FILE2. If FILE2 is omitted, compares FILE1 to the"
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echo "uncompressed contents of FILE1.[gz|bz2|lz] (depending on the default"
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echo "compressor selected). DIFF_OPTIONS are passed directly to diff or cmp."
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echo "The exit status from diff or cmp is preserved."
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echo
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echo "Options:"
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echo " -h, --help display this help and exit"
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echo " -V, --version output version information and exit"
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echo " --gzip use gzip as default decompressor"
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echo " --bzip2 use bzip2 as default decompressor"
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echo " --lzip use lzip as default decompressor (default)"
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echo " --xz use xz as default decompressor"
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echo " --diff use diff to compare files (default)"
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echo " --cmp use cmp to compare files"
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echo
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echo "Report bugs to lzip-bug@nongnu.org"
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echo "Lzip home page: http://www.nongnu.org/lzip/lzip.html"
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exit 0 ;;
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--version | --ve* | -V)
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echo "Zdiff VERSION"
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echo "Copyright (C) 2009 Antonio Diaz Diaz."
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echo "This script is free software: you have unlimited permission"
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echo "to copy, distribute and modify it."
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exit 0 ;;
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--gz*)
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default_ext=.gz ;;
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--bz*)
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default_ext=.bz2 ;;
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--lz*)
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default_ext=.lz ;;
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--xz*)
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default_prog=xz ;;
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--diff)
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diff_prog=diff ;;
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--cmp)
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diff_prog=cmp ;;
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-)
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echo "${invocation_name}: reading from stdin not supported"
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exit 1 ;;
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--)
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shift; break ;;
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-?*)
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args="${args} $1" ;;
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*)
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break ;;
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esac
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shift
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done
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# Loop over files
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while [ x"$1" != x ] ; do
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if [ "$1" != "--" ] ; then
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if test -f "$1"; then
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if test -z "${file1}"; then file1="$1"
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else
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if test -z "${file2}"; then file2="$1"
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else
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echo "${invocation_name}: Too many files; use --help for usage." 1>&2
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fi
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fi
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else
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echo "${invocation_name}: File \"$1\" not found or not a regular file" 1>&2
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exit 1
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fi
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fi
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shift
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done
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if test -z "${file1}"; then
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echo "${invocation_name}: No files given; use --help for usage." 1>&2
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exit 1
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fi
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if test -z "${file2}"; then
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case "${file1}" in
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*.gz)
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file2=`printf "%s" "${file1}" | sed 's/.gz$//'` ;;
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*.tgz)
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file2=`printf "%s" "${file1}" | sed 's/tgz$/tar/'` ;;
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*.bz2)
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file2=`printf "%s" "${file1}" | sed 's/.bz2$//'` ;;
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*.tbz)
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file2=`printf "%s" "${file1}" | sed 's/tbz$/tar/'` ;;
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*.tbz2)
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file2=`printf "%s" "${file1}" | sed 's/tbz2$/tar/'` ;;
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*.lz)
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file2=`printf "%s" "${file1}" | sed 's/.lz$//'` ;;
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*.tlz)
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file2=`printf "%s" "${file1}" | sed 's/tlz$/tar/'` ;;
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*.xz)
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file2=`printf "%s" "${file1}" | sed 's/.xz$//'` ;;
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*.txz)
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file2=`printf "%s" "${file1}" | sed 's/txz$/tar/'` ;;
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*)
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file2="${file1}${default_ext}" ;;
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esac
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fi
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prog1=
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prog2=
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case "${file1}" in
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*.gz | *.tgz) prog1=gzip ;;
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*.bz2 | *.tbz | *.tbz2) prog1=bzip2 ;;
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*.lz | *.tlz) prog1=lzip ;;
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*.xz | *.txz) prog1=xz ;;
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esac
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case "${file2}" in
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*.gz | *.tgz) prog2=gzip ;;
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*.bz2 | *.tbz | *.tbz2) prog2=bzip2 ;;
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*.lz | *.tlz) prog2=lzip ;;
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*.xz | *.txz) prog2=xz ;;
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esac
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retval=0
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if test -n "${prog1}"; then
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if test -n "${prog2}"; then
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tmp_file=`mktemp "${TMPDIR:-/tmp}"/zdiff.XXXXXXXXXX` || {
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echo 'cannot create a temporary file' 1>&2
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exit 1
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}
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${prog2} -cdfq -- "${file2}" > "${tmp_file}" || exit 1
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${prog1} -cdfq -- "${file1}" | ${diff_prog} ${args} - -- "${tmp_file}"
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retval=$?
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rm -f "${tmp_file}" || retval=$?
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else
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${prog1} -cdfq -- "${file1}" | ${diff_prog} ${args} - -- "${file2}"
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retval=$?
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fi
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else
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if test -n "${prog2}"; then
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${prog2} -cdfq -- "${file2}" | ${diff_prog} ${args} -- "${file1}" -
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retval=$?
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else
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${diff_prog} ${args} -- "${file1}" "${file2}"
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retval=$?
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fi
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fi
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exit ${retval}
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