oo_rezip

#! /bin/bash
#
# (c) 2008 Sergio Callegari
#
# Rewrites a zip archive, possibly changing the compression level

USAGE='Usage: rezip [options] [file]
with options:
  [-h | --help]            Gives help
  [-p ?]                   Lists known profiles
  [--unzip_opts options]   Pass options to unzip helper to read zip file
  [--zip_opts options]     Pass options to zip helper to write zip file
  [-p | --profile profile] Get options for helpers from profile

Rewrites a zip archive, possibily changing the compression level.
If the archive name is unspecified, then the command operates like a filter,
reading from standard input and writing to standard output.
Options can be manually provided to the unzip process doing the read and to
the zip process doing the write. Alternatively a profile can be used to set
options automatically.'

PROFILES="ODF_UNCOMPRESS ODF_COMPRESS"

PROFILE_UNZIP_ODF_UNCOMPRESS='-b -qq'
PROFILE_ZIP_ODF_UNCOMPRESS='-q -r -D -0 -X'
PROFILE_UNZIP_ODF_COMPRESS='-b -qq'
PROFILE_ZIP_ODF_COMPRESS='-q -r -D -6 -X'

die()
{
    echo "$1" >&$2
    exit $3
}

UNZIP_OPTS=""
ZIP_OPTS=""

echo "PAAAF : $*" 1>&2

while true ; do
    case "$1" in
        -h | --help)
            die "$USAGE" 1 0 ;;
        -p | --profile)
            if [ "$2" = "?" ] ; then
                die "Avalilable profiles: ${PROFILES}" 1 0 ;
            else
                profile=$2
                shift
                profile_unzip=PROFILE_UNZIP_${profile}
                profile_zip=PROFILE_ZIP_${profile}
                UNZIP_OPTS=${!profile_unzip}
                ZIP_OPTS=${!profile_zip}
            fi ;;
        --unzip_opts)
            UNZIP_OPTS=${UNZIP_OPTS} $2
            shift ;;
        --zip_opts)
            ZIP_OPTS=${ZIP_OPTS} $2
            shift ;;
        -*)
            die "$USAGE" 2 1 ;;
        *)
            break ;;
    esac
    shift
done

if [ $# = 0 ] ; then
    tmpcopy=$(mktemp rezip.zip.XXXXXX)
    cat > $tmpcopy
    filename="$tmpcopy"
else
    tmpcopy=""
    filename="$1"
fi

workdir=$(mktemp -d -t rezip.workdir.XXXXXX)
curdir=$(pwd)

cd $workdir
unzip $UNZIP_OPTS "$curdir/$filename"
zip $ZIP_OPTS "$curdir/$filename" .
cd $curdir
rm -fr $workdir
if [ ! -z "$tmpcopy" ] ; then
  cat $filename
  rm $tmpcopy
fi