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 shopt -s extglob
  24 shopt -s nullglob
  25
  26 declare -r myname='bacman'
  27 declare -r myver='@PACKAGE_VERSION@'
  28
  29 #
  30 # User Friendliness
  31 #
  32 usage() {
  33         echo "This program recreates a package using pacman's db and system files"
  34         echo "Usage:   $myname <installed package name>"
  35         echo "Example: $myname kernel26"
  36 }
  37
  38 version() {
  39         printf "%s %s\n" "$myname" "$myver"
  40         echo 'Copyright (C) 2008 locci <carlocci_at_gmail_dot_com>'
  41 }
  42
  43 if (( $# != 1 )); then
  44         usage
  45         exit 1
  46 fi
  47
  48 if [[ $1 = -@(h|-help) ]]; then
  49         usage
  50         exit 0
  51 elif [[ $1 = -@(V|-version) ]]; then
  52         version
  53         exit 0
  54 fi
  55
  56 #
  57 # Fakeroot support
  58 #
  59 if (( EUID )); then
  60         if [[ -f /usr/bin/fakeroot ]]; then
  61                 echo "Entering fakeroot environment"
  62                 export INFAKEROOT="1"
  63                 /usr/bin/fakeroot -u -- "$0" "$@"
  64                 exit $?
  65         else
  66                 echo "WARNING: installing fakeroot or running $myname as root is required to"
  67                 echo "         preserve the ownership permissions of files in some packages"
  68                 echo ""
  69         fi
  70 fi
  71
  72 #
  73 # Setting environmental variables
  74 #
  75 if [[ ! -r @sysconfdir@/pacman.conf ]]; then
  76         echo "ERROR: unable to read @sysconfdir@/pacman.conf"
  77         exit 1
  78 fi
  79
  80 eval $(awk '/DBPath/ {print $1$2$3}' @sysconfdir@/pacman.conf)
  81 pac_db="${DBPath:-@localstatedir@/lib/pacman/}/local"
  82
  83 if [[ ! -r @sysconfdir@/makepkg.conf ]]; then
  84         echo "ERROR: unable to read @sysconfdir@/makepkg.conf"
  85         exit 1
  86 fi
  87
  88 source "@sysconfdir@/makepkg.conf"
  89 if [[ -r ~/.makepkg.conf ]]; then
  90         source ~/.makepkg.conf
  91 fi
  92
  93 pkg_arch=${CARCH:-'unknown'}
  94 pkg_dest="${PKGDEST:-$PWD}"
  95 pkg_pkger=${PACKAGER:-'Unknown Packager'}
  96
  97 pkg_name="$1"
  98 pkg_dir=("$pac_db/$pkg_name"-+([^-])-+([^-]))
  99 pkg_namver=("${pkg_dir[@]##*/}")
 100
 101 #
 102 # Checks everything is in place
 103 #
 104 if [[ ! -d $pac_db ]]; then
 105         echo "ERROR: pacman database directory ${pac_db} not found"
 106         exit 1
 107 fi
 108
 109 if (( ${#pkg_dir[@]} != 1 )); then
 110         printf "ERROR: %d entries for package %s found in pacman database\n" \
 111                 ${#pkg_dir[@]} "${pkg_name}"
 112         printf "%s\n" "${pkg_dir[@]}"
 113         exit 1
 114 fi
 115
 116 if [[ ! -d $pkg_dir ]]; then
 117         printf "ERROR: package %s is found in pacman database,\n" "${pkg_name}"
 118         printf "       but \`%s' is not a directory\n" "${pkg_dir}"
 119         exit 1
 120 fi
 121
 122 #
 123 # Begin
 124 #
 125 echo "Package: ${pkg_namver}"
 126 work_dir=$(mktemp -d --tmpdir bacman.XXXXXXXXXX)
 127 cd "$work_dir" || exit 1
 128
 129 #
 130 # File copying
 131 #
 132 echo "Copying package files..."
 133
 134 cat "$pkg_dir"/files |
 135 while read i; do
 136         if [[ -z $i ]]; then
 137                 continue
 138         fi
 139
 140         if [[ $i == %+([A-Z])% ]]; then
 141                 current=$i
 142                 continue
 143         fi
 144
 145         case "$current" in
 146                 %FILES%)
 147                         ret=0
 148                         if [[ -e /$i ]]; then
 149                                 bsdtar -cnf - "/$i" 2> /dev/null | bsdtar -xpf -
 150
 151                                 # Workaround to bsdtar not reporting a missing file as an error
 152                                 if ! [[ -e $work_dir/$i || -L $work_dir/$i ]]; then
 153                                         echo ""
 154                                         echo "ERROR: unable to add /$i to the package"
 155                                         echo "       If your user does not have permssion to read this file then"
 156                                         echo "       you will need to run $myname as root"
 157                                         rm -rf "$work_dir"
 158                                         exit 1
 159                                 fi
 160                         else
 161                                 echo ""
 162                                 echo "WARNING: package file /$i is missing"
 163                                 echo ""
 164                         fi
 165                         ;;
 166         esac
 167 done
 168
 169 ret=$?
 170 if (( ret )); then
 171         rm -rf "$work_dir"
 172         exit 1
 173 fi
 174
 175 pkg_size=$(du -sk | awk '{print $1 * 1024}')
 176
 177 #
 178 # .PKGINFO stuff
 179 # TODO adopt makepkg's write_pkginfo() into this or scripts/library
 180 #
 181 echo Generating .PKGINFO metadata...
 182 echo "# Generated by $myname $myver"    > .PKGINFO
 183 if [[ $INFAKEROOT == "1" ]]; then
 184         echo "# Using $(fakeroot -v)"    >> .PKGINFO
 185 fi
 186 echo "# $(LC_ALL=C date)"            >> .PKGINFO
 187 echo "#"                    >> .PKGINFO
 188
 189 cat "$pkg_dir"/{desc,files} |
 190 while read i; do
 191         if [[ -z $i ]]; then
 192                 continue;
 193         fi
 194
 195         if [[ $i == %+([A-Z])% ]]; then
 196                 current=$i
 197                 continue
 198         fi
 199
 200         case "$current" in
 201                 # desc
 202                 %NAME%)
 203                         echo "pkgname = $i"    >> .PKGINFO
 204                         ;;
 205                 %VERSION%)
 206                         echo "pkgver = $i"    >> .PKGINFO
 207                         ;;
 208                 %DESC%)
 209                         echo "pkgdesc = $i"    >> .PKGINFO
 210                         ;;
 211                 %URL%)
 212                         echo "url = $i"    >> .PKGINFO
 213                         ;;
 214                 %LICENSE%)
 215                         echo "license = $i"    >> .PKGINFO
 216                         ;;
 217                 %ARCH%)
 218                         echo "arch = $i"    >> .PKGINFO
 219                         ;;
 220                 %BUILDDATE%)
 221                         echo "builddate = $(date -u "+%s")"    >> .PKGINFO
 222                         ;;
 223                 %PACKAGER%)
 224                         echo "packager = $pkg_pkger"        >> .PKGINFO
 225                         ;;
 226                 %SIZE%)
 227                         echo "size = $pkg_size"        >> .PKGINFO
 228                         ;;
 229                 %GROUPS%)
 230                         echo "group = $i"    >> .PKGINFO
 231                         ;;
 232                 %REPLACES%)
 233                         echo "replaces = $i"    >> .PKGINFO
 234                         ;;
 235                 %DEPENDS%)
 236                         echo "depend = $i"   >> .PKGINFO
 237                         ;;
 238                 %OPTDEPENDS%)
 239                         echo "optdepend = $i" >> .PKGINFO
 240                         ;;
 241                 %CONFLICTS%)
 242                         echo "conflict = $i" >> .PKGINFO
 243                         ;;
 244                 %PROVIDES%)
 245                         echo "provides = $i"  >> .PKGINFO
 246                         ;;
 247
 248                 # files
 249                 %BACKUP%)
 250                         # strip the md5sum after the tab
 251                         echo "backup = ${i%%$'\t'*}"   >> .PKGINFO
 252                         ;;
 253         esac
 254 done
 255
 256 comp_files=".PKGINFO"
 257
 258 if [[ -f $pkg_dir/install ]]; then
 259         cp "$pkg_dir/install" "$work_dir/.INSTALL"
 260         comp_files+=" .INSTALL"
 261 fi
 262 if [[ -f $pkg_dir/changelog ]]; then
 263         cp "$pkg_dir/changelog" "$work_dir/.CHANGELOG"
 264         comp_files+=" .CHANGELOG"
 265 fi
 266
 267 #
 268 # Fixes owner:group and permissions for .PKGINFO, .CHANGELOG, .INSTALL
 269 #
 270 chown root:root "$work_dir"/{.PKGINFO,.CHANGELOG,.INSTALL} 2> /dev/null
 271 chmod 644 "$work_dir"/{.PKGINFO,.CHANGELOG,.INSTALL} 2> /dev/null
 272
 273 #
 274 # Generate the package
 275 #
 276 echo "Generating the package..."
 277
 278 pkg_file="$pkg_dest/$pkg_namver-$pkg_arch${PKGEXT}"
 279 ret=0
 280
 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.Z)   compress -c -f ;;
 289         *tar)     cat ;;
 290         *) echo "WARNING: '%s' is not a valid archive extension." \
 291         "$PKGEXT" >&2; cat ;;
 292 esac > "${pkg_file}"; ret=$?
 293
 294 if (( ret )); then
 295         echo "ERROR: unable to write package to $pkg_dest"
 296         echo "       Maybe the disk is full or you do not have write access"
 297         rm -rf "$work_dir"
 298         exit 1
 299 fi
 300
 301 rm -rf "$work_dir"
 302
 303 echo Done
 304
 305 exit 0
 306
 307 # vim: set ts=2 sw=2 noet:
 308