contrib/bacman.in

   1 #!/bin/bash
   2 #
   3 #   bacman: recreate a package from a running system
   4 #   This script rebuilds an already installed package using metadata
   5 #   stored into the pacman database and system files
   6 #
   7 #   (c) 2008 - locci <carlocci_at_gmail_dot_com>
   8 #
   9 #   This program is free software; you can redistribute it and/or modify
  10 #   it under the terms of the GNU General Public License as published by
  11 #   the Free Software Foundation; either version 2 of the License, or
  12 #   (at your option) any later version.
  13 #
  14 #   This program is distributed in the hope that it will be useful,
  15 #   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 #   GNU General Public License for more details.
  18 #
  19 #   You should have received a copy of the GNU General Public License
  20 #   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 #
  22
  23 readonly progname="bacman"
  24 readonly progver="0.2.1"
  25
  26 #
  27 # User Friendliness
  28 #
  29 function usage(){
  30     echo "This program recreates a package using pacman's db and system files"
  31     echo "Usage:   $progname <installed package name>"
  32     echo "Example: $progname kernel26"
  33 }
  34
  35 if [ $# -ne 1 ] ; then
  36     usage
  37     exit 1
  38 fi
  39
  40 if [ "$1" = "--help" -o "$1" = "-h" ] ; then
  41     usage
  42     exit 0
  43 fi
  44
  45 if [ "$1" = "--version" -o "$1" = "-v" ]; then
  46     echo "$progname version $progver"
  47     echo "Copyright (C) 2008 locci"
  48     exit 0
  49 fi
  50
  51 #
  52 # Fakeroot support
  53 #
  54 if [ $EUID -gt 0 ]; then
  55     if [ -f /usr/bin/fakeroot ]; then
  56         echo "Entering fakeroot environment"
  57         export INFAKEROOT="1"
  58         /usr/bin/fakeroot -u -- $0 $1
  59         exit $?
  60     else
  61         echo "WARNING: installing fakeroot or running ${progname} as root is required to"
  62         echo "         preserve the ownership permissions of files in some packages"
  63         echo ""
  64     fi
  65 fi
  66
  67 #
  68 # Setting environmental variables
  69 #
  70 if [ ! -r @sysconfdir@/pacman.conf ]; then
  71     echo "ERROR: unable to read @sysconfdir@/pacman.conf"
  72     exit 1
  73 fi
  74
  75 eval $(awk '/DBPath/ {print $1$2$3}' @sysconfdir@/pacman.conf)
  76 pac_db="${DBPath:-@localstatedir@/lib/pacman/}/local"
  77
  78 if [ ! -r @sysconfdir@/makepkg.conf ]; then
  79     echo "ERROR: unable to read @sysconfdir@/makepkg.conf"
  80     exit 1
  81 fi
  82
  83 source "@sysconfdir@/makepkg.conf"
  84 if [ -r ~/.makepkg.conf ]; then
  85     source ~/.makepkg.conf
  86 fi
  87
  88 pkg_arch=${CARCH:-'unknown'}
  89 pkg_dest="${PKGDEST:-$PWD}"
  90 pkg_pkger=${PACKAGER:-'Unknown Packager'}
  91
  92 pkg_name="$1"
  93 pkg_dir="$(echo $pac_db/$pkg_name-[0-9]*)"
  94 pkg_namver="${pkg_dir##*/}"
  95
  96 #
  97 # Checks everything is in place
  98 #
  99 if [ ! -d "$pac_db" ] ; then
 100     echo "ERROR: pacman database directory ${pac_db} not found"
 101     exit 1
 102 fi
 103
 104 if [ ! -d "$pkg_dir" ] ; then
 105     echo "ERROR: package ${pkg_name} not found in pacman database"
 106     exit 1
 107 fi
 108
 109 #
 110 # Begin
 111 #
 112 echo Package: ${pkg_namver}
 113 work_dir=$(mktemp -d -p /tmp)
 114 cd "$work_dir" || exit 1
 115
 116 #
 117 # File copying
 118 #
 119 echo "Copying package files..."
 120
 121 cat "$pkg_dir"/files |
 122 while read i; do
 123     if [ -z "$i" ] ; then
 124         continue
 125     fi
 126
 127     if [[ "$i" =~ %[A-Z]*% ]] ; then
 128         current=$i
 129         continue
 130     fi
 131
 132     case $current in
 133         %FILES%)
 134             ret=0
 135             if [ -e "/$i" ]; then
 136                 bsdtar -cnf - "/$i" 2> /dev/null | bsdtar -xpf -
 137
 138                 # Workaround to bsdtar not reporting a missing file as an error
 139                 if [ ! -e "$work_dir/$i" -a ! -L "$work_dir/$i" ]; then
 140                     echo ""
 141                     echo "ERROR: unable to add /$i to the package"
 142                     echo "       If your user does not have permssion to read this file then"
 143                     echo "       you will need to run $progname as root"
 144                     rm -rf "$work_dir"
 145                     exit 1
 146                 fi
 147             else
 148                 echo ""
 149                 echo "WARNING: package file /$i is missing"
 150                 echo ""
 151             fi
 152
 153
 154         ;;
 155     esac
 156 done
 157
 158 ret=$?
 159 if [ $ret -ne 0 ]; then
 160     rm -rf "$work_dir"
 161     exit 1
 162 fi
 163
 164 pkg_size=$(du -sk | awk '{print $1 * 1024}')
 165
 166 #
 167 # .PKGINFO stuff
 168 #
 169 echo Generating .PKGINFO metadata...
 170 echo "# Generated by $progname $progver"    > .PKGINFO
 171 if [ "$INFAKEROOT" = "1" ]; then
 172     echo "# Using $(fakeroot -v)"    >> .PKGINFO
 173 fi
 174 echo "# $(LC_ALL=C date)"            >> .PKGINFO
 175 echo "#"                    >> .PKGINFO
 176
 177 cat "$pkg_dir"/{desc,files} |
 178 while read i; do
 179     if [[ -z "$i" ]]; then
 180         continue;
 181     fi
 182
 183     if [[ "$i" =~ %[A-Z]*% ]] ; then
 184         current=$i
 185         continue
 186     fi
 187
 188     case "$current" in
 189         # desc
 190         %NAME%)
 191             echo "pkgname = $i"    >> .PKGINFO
 192         ;;
 193         %VERSION%)
 194             echo "pkgver = $i"    >> .PKGINFO
 195         ;;
 196         %DESC%)
 197             echo "pkgdesc = $i"    >> .PKGINFO
 198         ;;
 199         %URL%)
 200             echo "url = $i"    >> .PKGINFO
 201         ;;
 202         %LICENSE%)
 203             echo "license = $i"    >> .PKGINFO
 204         ;;
 205         %ARCH%)
 206             echo "arch = $i"    >> .PKGINFO
 207         ;;
 208         %BUILDDATE%)
 209             echo "builddate = $(date -u "+%s")"    >> .PKGINFO
 210         ;;
 211         %PACKAGER%)
 212             echo "packager = $pkg_pkger"        >> .PKGINFO
 213         ;;
 214         %SIZE%)
 215             echo "size = $pkg_size"        >> .PKGINFO
 216         ;;
 217         %GROUPS%)
 218             echo "group = $i"    >> .PKGINFO
 219         ;;
 220         %REPLACES%)
 221             echo "replaces = $i"    >> .PKGINFO
 222         ;;
 223         %DEPENDS%)
 224             echo "depend = $i"   >> .PKGINFO
 225         ;;
 226         %OPTDEPENDS%)
 227             echo "optdepend = $i" >> .PKGINFO
 228         ;;
 229         %CONFLICTS%)
 230             echo "conflict = $i" >> .PKGINFO
 231         ;;
 232         %PROVIDES%)
 233             echo "provides = $i"  >> .PKGINFO
 234         ;;
 235
 236         # files
 237         %BACKUP%)
 238             # strip the md5sum after the tab
 239             echo "backup = ${i%%$'\t'*}"   >> .PKGINFO
 240         ;;
 241     esac
 242 done
 243
 244 comp_files=".PKGINFO"
 245
 246 if [ -f "$pkg_dir/install" ] ; then
 247     cp "$pkg_dir/install" "$work_dir/.INSTALL"
 248     comp_files+=" .INSTALL"
 249 fi
 250 if  [ -f $pkg_dir/changelog ] ; then
 251     cp "$pkg_dir/changelog" "$work_dir/.CHANGELOG"
 252     comp_files+=" .CHANGELOG"
 253 fi
 254
 255 #
 256 # Fixes owner:group and permissions for .PKGINFO, .CHANGELOG, .INSTALL
 257 #
 258 chown root:root "$work_dir"/{.PKGINFO,.CHANGELOG,.INSTALL} 2> /dev/null
 259 chmod 644 "$work_dir"/{.PKGINFO,.CHANGELOG,.INSTALL} 2> /dev/null
 260
 261 #
 262 # Generate the package
 263 #
 264 echo "Generating the package..."
 265
 266 case "$PKGEXT" in
 267         *tar.gz)  EXT=${PKGEXT%.gz} ;;
 268         *tar.bz2) EXT=${PKGEXT%.bz2} ;;
 269         *tar.xz)  EXT=${PKGEXT%.xz} ;;
 270         *tar)     EXT=${PKGEXT} ;;
 271         *) echo "WARNING: '%s' is not a valid archive extension." \
 272         "$PKGEXT" ; EXT=$PKGEXT ;;
 273 esac
 274
 275 pkg_file="$pkg_dest/$pkg_namver-$pkg_arch${PKGEXT}"
 276 ret=0
 277
 278 # when fileglobbing, we want * in an empty directory to expand to
 279 # the null string rather than itself
 280 shopt -s nullglob
 281 # TODO: Maybe this can be set globally for robustness
 282 shopt -s -o pipefail
 283 bsdtar -cf - $comp_files * |
 284 case "$PKGEXT" in
 285     *tar.gz)  gzip -c -f -n ;;
 286     *tar.bz2) bzip2 -c -f ;;
 287     *tar.xz)  xz -c -z - ;;
 288     *tar)     cat ;;
 289 esac > ${pkg_file} || ret=$?
 290
 291 if [ $ret -ne 0 ]; then
 292     echo "ERROR: unable to write package to $pkg_dest"
 293     echo "       Maybe the disk is full or you do not have write access"
 294     rm -rf "$work_dir"
 295     exit 1
 296 fi
 297
 298 rm -rf "$work_dir"
 299
 300 echo Done
 301
 302 exit 0
 303
 304 # vim: set ts=2 sw=2 noet:
 305