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|
#!/bin/sh
#
# $NetBSD: doc-compress,v 1.3 2006/01/19 17:22:26 jlam Exp $
#
# This script is derived from software contributed to The NetBSD Foundation
# by Alistair Crooks.
#
# This script compresses or decompresses files listed in standard input.
# It handles symlinks by recreating the symlinks to point to the
# compressed or uncompressed targets.
#
######################################################################
#
# NAME
# doc-compress -- handle compression of PLIST entries
#
# SYNOPSIS
# doc-compress [-v] [-z] prefix
#
# DESCRIPTION
# doc-compress handles compression of files passed in via standard
# input. The file paths must be relative to the specified prefix.
# doc-compress handles symlinks to compressed files intelligently by
# symlinking to the compressed target if compression is desired, and
# similarly for decompression.
#
# OPTIONS
# The following command line arguments are supported.
#
# -v Output the action taken for each file (compressing,
# decompressing, or symlinking) to standard output.
#
# -z Compress the files. By default, the files are decompressed.
#
# ENVIRONMENT
# MANZ This variable controls the default action taken. If "yes",
# then this is equivalent to specifying the "-z" option.
#
# PKG_VERBOSE
# This controls the default verbosity of the output. If
# non-empty, then this is equivalent to specifying the "-v"
# option.
#
######################################################################
: ${ECHO=echo}
: ${EXPR=expr}
: ${GZIP_CMD=gzip}
: ${GUNZIP_CMD=gunzip}
: ${LN=ln}
: ${LS=ls}
: ${RM=rm}
: ${TEST=test}
self="${0##*/}"
usage() {
${ECHO} 1>&2 "usage: $self [-v] [-z] prefix"
}
compress=no
verbose=no
prefix=/nonexistent
case "$MANZ" in
[yY][eE][sS]) compress=yes ;;
esac
case "$PKG_VERBOSE" in
"") ;;
*) verbose=yes ;;
esac
# Process optional arguments
while ${TEST} $# -gt 0; do
case "$1" in
-v) verbose=yes; shift ;;
-z) compress=yes; shift ;;
--) shift; break ;;
-*) ${ECHO} 1>&2 "$self: unknown option -- ${1#-}"
usage
exit 1
;;
*) break ;;
esac
done
${TEST} $# -gt 0 || { usage; exit 1; }
# Process required arguments
prefix="$1"
while read file; do
file="${file%.gz}"
path="$prefix/$file"
pathgz="$path.gz"
case "$compress" in
yes)
# If compressed pages were requested and we find an
# uncompressed page, then compress it, but if it was
# a symlink, then remove it and create a "compressed"
# symlink by symlinking to the compressed target.
#
if ${TEST} -h "$path"; then
target=`${LS} -l $path`
target="${target##*-> }"
${RM} -f $pathgz
${LN} -s $target.gz $pathgz
${RM} -f $path
${TEST} "$verbose" = no ||
${ECHO} "Symlinking: $file"
elif ${TEST} -f "$path"; then
${GZIP_CMD} -nf $path
${TEST} "$verbose" = no ||
${ECHO} "Compressing: $file"
fi
;;
no)
# If uncompressed pages were requested and we find a
# compressed page, then decompress it, but if it was
# a symlink, then remove it and create an "uncompressed"
# symlink by symlinking to the uncompressed target.
#
if ${TEST} -h "$pathgz"; then
target=`${LS} -l $pathgz`
target="${target##*-> }"
target="${target%.gz}"
${RM} -f $path
${LN} -s $target $path
${RM} -f $pathgz
${TEST} "$verbose" = no ||
${ECHO} "Symlinking: $file.gz"
elif ${TEST} -f "$pathgz"; then
${GUNZIP_CMD} -f $pathgz
${TEST} "$verbose" = no ||
${ECHO} "Decompressing: $file.gz"
fi
;;
esac
done
|
