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#!/bin/bash |
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# lzme re-compress gzip, zip, bzip2 ... files into xz |
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#============================================================================== |
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# Copyright (C) 1999-2002 MandrakeSoft (tvignaud@mandrakesoft.com) |
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# By Thierry Vignaud <tvignaud@mandrakesoft.com> |
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# |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2, or (at your option) |
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# any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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# |
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# The GNU General Public License can be read at |
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# http://www.fsf.org/copyleft/gpl.html |
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#============================================================================== |
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# |
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# Know bugs: |
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# ---------- |
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# - bash getopt isn't gnu style aware, ie cmd opt1 file1 file2 opt2 |
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# will result in ignoring opt2 option |
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# |
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#============================================================================== |
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# |
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# Changelog: |
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# ---------- |
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# v1.0: original release |
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# v1.1: fix space usage (use pipe rather than temp file) |
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# v1.2: keep source file, not bz2 one if eof while decompressing |
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# v1.3: reduce used cpu time (decompressing only one time; |
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# source crc error 're detected through PIPESTATUS) |
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# v1.4: add zip support on popular^h^h^h^h^hGwenole request |
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# v1.5: |
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# - make zip method acting as z one (remove original file, |
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# keeping only smallest file, displaying size gain, ...) |
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# thus giving occasion to factorize some common code |
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# - check that the source file does exists |
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# - handle corrupted zip source file |
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# - comment the script and verbos-ize() some old changes |
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# - use cheaper shell tests |
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# - add GPL reference |
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# - update online help to reflect optional options and newer |
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# supported formats |
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# - remove dependency on sed by using ${1%old}new_extension |
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# v1.6: |
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# - print error message on stderr rather than on stdin |
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# - factorize/simplify zip method (fix erase temp files on bzip2ing |
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# error) |
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# - typo fixes |
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# - simplify for_each(file) loop |
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# - add "Know bugs" and TODO sections |
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# - add -h and -k options |
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# - if -k (keep) option is used, keep all files |
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# v1.7: handle file names with spaces |
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# |
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# v1.7a: added support for lzmash (Giuseppe Ghibò, <ghibo@mandriva.com>) |
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# |
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# v1.7b: updated to use new lzma command line tool which replaces old lzmash wrapper |
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# (Per Øyvind Karlsen <pkarlsen@mandriva.com>) |
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# |
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# v1.7c: use default compression level as -9 will take too much time and use too much |
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# memory for decompression to make it worthwhile (Per Øyvind Karlsen <pkarlsen@mandriva.com> |
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# |
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# v1.7d: us new xz format rather than old lzma_alone format (Per Øyvind Karlsen <peroyvind@mandriva.org> |
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# |
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# TODO: |
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# - retrieve my patch for solaris file utils |
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# - add trap for zip method (is it really useful?) |
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# - add a man page |
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# - move bzme in its own package that requires tar too |
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|
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|
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# Defaults |
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force= |
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keep= |
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|
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# Corrupted source error message |
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src_err_msg () |
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{ if [ "$2" != 0 ]; then |
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echo "Corrupted source file ($1) !" 1>&2 |
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rm -f "$TARGET" |
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STATUS=1 |
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fi |
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} |
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|
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gz_compr () |
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{ zcat "$1" | xz > "$TARGET" |
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# Keep PIPESTATUS |
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MY_STATUS=( ${PIPESTATUS[*]} ) |
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src_err_msg "$1" ${MY_STATUS[0]} |
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if [[ "${MY_STATUS[1]}" != "0" ]]; then |
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echo "error while xz'ing !" 1>&2 |
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STATUS=1 |
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fi |
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} |
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|
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bzip2_compr () |
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{ bzcat "$1" | xz > "$TARGET" |
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# Keep PIPESTATUS |
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MY_STATUS=( ${PIPESTATUS[*]} ) |
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src_err_msg "$1" ${MY_STATUS[0]} |
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if [[ "${MY_STATUS[1]}" != "0" ]]; then |
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echo "error while xz'ing !" 1>&2 |
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STATUS=1 |
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fi |
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} |
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|
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lzma_compr () |
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{ xzcat "$1" | xz > "$TARGET" |
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# Keep PIPESTATUS |
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MY_STATUS=( ${PIPESTATUS[*]} ) |
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src_err_msg "$1" ${MY_STATUS[0]} |
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if [[ "${MY_STATUS[1]}" != "0" ]]; then |
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echo "error while xz'ing !" 1>&2 |
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STATUS=1 |
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fi |
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} |
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|
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zip_compr () |
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{ |
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[[ -z "$TMPDIR" ]] && TMPDIR=$TMP |
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MY_TMP=$(mktemp -d $TMPDIR/xzme.XXXXXX) |
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unzip -qd $MY_TMP "$1" |
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src_err_msg "$1" $? |
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tar cfj "$TARGET" -C $MY_TMP . |
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if [[ $? != 0 ]]; then |
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echo "error while taring !" 1>&2 |
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STATUS=1 |
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fi |
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# Removing temporary files |
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rm -fr $MY_TMP |
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} |
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|
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compress () |
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{ echo -n "Compressing $1 ... " |
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if [[ ! -f "$1" ]]; then |
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echo "Source file doesn't exist" 1>&2 |
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return |
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fi |
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STATUS=0 |
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SIZE=$(du -k "$1"|cut -f 1 -d " ") |
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if [[ -f "$TARGET" ]]; then |
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if [[ -n $force ]];then |
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rm -f "$TARGET" |
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else |
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echo "$TARGET already exists !!" 1>&2 |
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echo "Use -f to force it" |
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return |
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fi |
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fi |
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# Do the real compression job |
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$METHOD "$1" |
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# if there was an error |
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if [[ $STATUS = 1 ]]; then |
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[[ -z $keep ]] && rm -f "$TARGET" |
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return |
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fi |
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# Compare size in order to only keep the smallest file |
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SIZE2=$(du -k "$TARGET"|cut -f 1 -d " ") |
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if [[ $SIZE -lt $SIZE2 && -z $force_compress ]] |
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then |
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echo "=> $TARGET is bigger than $1 ($SIZE"kb" => $SIZE2"kb") !!!" |
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echo "Use -F to force the recompression" |
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[[ -z $keep ]] && rm -f "$TARGET" |
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else |
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echo "=> $TARGET ($SIZE"kb" => $SIZE2"kb")" |
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|
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[[ -z $keep ]] && rm -f "$1" |
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fi |
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} |
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|
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while getopts Ffhk opt; do |
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case "$opt" in |
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F) force_compress="yes";; |
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f) force="yes";; |
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k) keep="yes";; |
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h) |
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echo "Usage: xzme [-Ffhk] file.*.({,t}gz|bz2|lzma|Z|zip)" |
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exit 1;; |
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*) |
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echo "See xzme -h for usage" |
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exit 1;; |
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esac |
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done |
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shift $((OPTIND - 1)) |
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|
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echo keeping: $keep |
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|
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while [[ "$1" != "" ]] |
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do |
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#default method is .lzma,.bz2,.gz,.Z,.z,.. |
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METHOD=gz_compr |
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case "$1" in |
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*.xz) echo "$1: already compressed!"; shift;continue;; |
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*.lzma) METHOD=lzma_compr |
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TARGET=${1%.lzma}.xz;; |
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*.bz2) METHOD=bzip2_compr |
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TARGET=${1%.tar.bz2}.tar.xz |
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;; |
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*.tgz) TARGET=${1%.tgz}.txz;; |
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*.Z) TARGET=${1%.Z}.xz;; |
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*.gz) TARGET=${1%.gz}.xz;; |
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*.zip) |
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METHOD=zip_compr |
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TARGET=${1%.zip}.tar.xz |
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;; |
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*) echo "$1: unknown file extension => ignored"; shift; continue;; |
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esac |
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compress "$1" |
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shift |
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done |
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