archives2git

   1 #!/bin/sh
   2 # Copyright © 2013,2014 Géraud Meyer <graud@gmx.com>
   3 #
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License version 2 as
   6 # published by the Free Software Foundation.
   7 #
   8 # This program is distributed in the hope that it will be useful, but
   9 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  10 # or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11 # for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License along
  14 # with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 PROGRAM_NAME="archives2git"
  17 PROGRAM_VERSION="0.1+"
  18 help_message () {
  19 cat <<HelpMessage
  20 NAME
  21         $PROGRAM_NAME - generate a Git history from a series of release tarballs
  22 USAGE
  23         $PROGRAM_NAME [<options>] [--] <archives_and_dirs>
  24 OPTIONS
  25         --repo <work_tree_subdir>
  26         --rename <sh_code>
  27         --keep-filter <sh_code>
  28         --date <sh_code>
  29         --title <sh_code>
  30         --body <message>
  31         --gitadd-arg <arg>
  32         --gitci-arg <arg>
  33         --gitfilter <nl_separated_args>
  34         --tag
  35         --tagname <sh_code>
  36         --debug
  37         --help
  38         --version
  39 SHELL VARIABLES
  40         The following shell variables are usable if appropriate in the shell code
  41         snippets passed as command line options: \$arch, \$archname, \$archdir,
  42         \$file.
  43 ENVIRONMENT
  44         GIT_AUTHOR_NAME
  45         GIT_AUTHOR_EMAIL
  46         GIT_COMMITTER_NAME
  47         GIT_COMMITTER_EMAIL
  48 FILES
  49         ~/.archives2gitrc
  50                 An example file is distributed.
  51 EXAMPLES
  52         See the README.
  53 SEE ALSO
  54         git-commit-tree(1), git_load_dirs(1)
  55 HelpMessage
  56 }
  57
  58 # default parameters
  59 RENAME='echo "$file"' # $file $arch $archname
  60 FILTER='false' # $file $arch $archname
  61 DATE='' # $arch $archname
  62 TITLE='echo "$arch"' # $arch $archname
  63 BODY="" # message taken as is
  64 ADDARGS=
  65 CIARGS=
  66 FILTERHEAD= # line separated arguments
  67 TAG=
  68 TAGDEF='printf version/; printf "%s\n" "$archname" |
  69   LC_ALL=C sed -e '\''s/^.*[-_]\([0-9][-0-9.ab]*\)$/\1/'\'
  70 # config (file, environment, command line)
  71 [ -f "$HOME"/.archives2gitrc ] && . "$HOME"/.archives2gitrc
  72 GIT_WORK_TREE=${GIT_WORK_TREE-.}
  73   # may be a subdir of the top level
  74 while [ $# -gt 0 ]
  75 do
  76         case $1 in
  77         --repo)
  78                 shift; GIT_WORK_TREE=$1 ;;
  79         --rename)
  80                 shift; RENAME=$1 ;;
  81         --keep-filter)
  82                 shift; FILTER=$1 ;;
  83         --date)
  84                 shift; DATE=$1 ;;
  85         --title)
  86                 shift; TITLE=$1 ;;
  87         --body)
  88                 shift; BODY=$1 ;;
  89         --gitadd-arg)
  90                 shift; ADDARGS="$ADDARGS $1" ;;
  91         --gitci-arg)
  92                 shift; CIARGS="$CIARGS $1" ;;
  93         --gitfilter)
  94                 shift; FILTERHEAD=$1 ;;
  95         --tag)
  96                 TAG=$TAGDEF ;;
  97         --tagname)
  98                 shift; TAG=$1 ;;
  99         --debug)
 100                 set -x ;;
 101         --help|-h)
 102                 help_message
 103                 exit ;;
 104         --version)
 105                 echo "$PROGRAM_NAME version $PROGRAM_VERSION"
 106                 exit ;;
 107         --?*)
 108                 echo >&2 "$PROGRAM_NAME: error: unknown option $1"
 109                 exit 255 ;;
 110         --)
 111                 shift; break ;;
 112         *)
 113                 break ;;
 114         esac
 115         shift
 116 done
 117 # setup
 118 NL='
 119 '
 120 TMPDIR=$(mktemp -d)
 121 WRKDIR=$(pwd)
 122 # git repository check
 123 cd "$GIT_WORK_TREE" &&
 124 { test -d .git || git rev-parse --git-dir >/dev/null; } ||
 125 {
 126         echo >&2 "$PROGRAM_NAME: error: not in a git repository ($(pwd))"
 127         exit 255
 128 }
 129 test -z "$(git status --porcelain)" &&
 130 git update-index -q --refresh ||
 131 {
 132         echo >&2 "$PROGRAM_NAME: error: unstaged files or dirty index"
 133         exit 254
 134 }
 135
 136 # main
 137 set -e
 138 OLDIFS=$IFS
 139 for arch
 140 do
 141         # put the files in the archive dir
 142         cd "$WRKDIR"
 143         if [ -d "$arch" ]
 144         then
 145                 cp -R "$arch" "$TMPDIR"
 146         else
 147                 aunpack -X "$TMPDIR" "$arch"
 148         fi
 149         archdir=$TMPDIR
 150         archname=$( printf "%s\n" "$arch" | LC_ALL=C sed \
 151           -e 's;^\([^/]*/\)*\([^/]\{1,\}\)/\{0,1\}$;\2;' \
 152           -e 's;\.\([Zz]\|lzo\|bz\|gz\|bz2\|xz\|lzma\|7z\|lz\|rz\|lrz\)$;;' \
 153           -e 's;\.\(tar\|t[Zz]\|tzo\|tbz\|tgz\|tbz2\|txz\|t7z\|tlz\|lha\|lzh\|7z\|alz\|arj\|zip\|rar\|jar\|war\|ace\|cab\|a\|cpio\|shar\|rpm\|deb\)$;;' \
 154           -e 's;\.\(orig\)$;;' )
 155         # remove (almost) everything from the repository dir
 156         cd "$GIT_WORK_TREE"
 157         for file in * .*
 158         do
 159                 [ -e "$file" ] || continue
 160                 [ x"$file" = x"." ] || [ x"$file" = x".." ] || [ x"$file" = x".git" ] && continue
 161                 eval "$FILTER" || { git rm -r "$file" || rm -R "$file"; }
 162         done
 163         # move the content of the temp dir to the repository and stage it
 164         for file in "$archdir"/* "$archdir"/.*
 165         do
 166                 [ -e "$file" ] || continue
 167                 file=${file#$archdir/}
 168                 [ x"$file" = x"." ] || [ x"$file" = x".." ] && continue
 169                 name=$(eval "$RENAME")
 170                 if [ -n "$name" ]
 171                 then
 172                         [ ! -e ./"$name" ] || rm -R ./"$name"
 173                           # remove conflicting file (previously kept or renamed to the same name)
 174                         mv "$archdir"/"$file" ./"$name"
 175                         git add $ADDARGS ./"$name"
 176                 else
 177                         rm -R "$archdir"/"$file"
 178                 fi
 179         done
 180         # commit, filter and clean up
 181         file=
 182         git commit -m "$(eval "$TITLE")${BODY:+$NL$BODY}" \
 183           ${DATE:+--date "$(eval "$DATE")"} $CIARGS
 184         if [ -n "$FILTERHEAD" ]
 185         then
 186                 IFS=$NL
 187                 git filter-branch $FILTERHEAD -- HEAD^..HEAD
 188                 rm -R "$(git rev-parse --git-dir)"/refs/original/
 189                 IFS=$OLDIFS
 190         fi
 191         if [ -n "$TAG" ]
 192         then
 193                 tagmessage=$(eval "$TAG" | LC_ALL=C tail -n +2)
 194                 tagname=$(eval "$TAG" | LC_ALL=C head -1)
 195                 git tag ${tagmessage:+-m "$tagmessage"} "$tagname"
 196         fi
 197 done
 198
 199 # cleanup
 200 rmdir "$TMPDIR"