archives2git

   1 #!/bin/sh
   2 # archives2git - generate a Git history from a series of release tarballs
   3 # Copyright © 2013 Géraud Meyer <graud@gmx.com>
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License version 2 as
   7 # published by the Free Software Foundation.
   8 #
   9 # This program is distributed in the hope that it will be useful, but
  10 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11 # or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 # for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License along
  15 # with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 PROGRAM_NAME="archives2git"
  18 PROGRAM_VERSION="0"
  19 # Usage:
  20 #   archives2git [<options>] [--] <archives>
  21
  22 # parameters
  23 RENAME='echo "$file"'
  24 GIT_WORK_TREE=${GIT_WORK_TREE-.}
  25 FILTER='false $file'
  26 DATE=''
  27 TITLE='echo "$arch"'
  28 BODY=
  29 ARGS=
  30 while [ $# -gt 0 ]
  31 do
  32         case $1 in
  33         --rename)
  34                 shift; RENAME=$1 ;;
  35         --repo)
  36                 shift; GIT_WORK_TREE=$1 ;;
  37         --keep-filter)
  38                 shift; FILTER=$1 ;;
  39         --date)
  40                 shift; DATE=$1 ;;
  41         --title)
  42                 shift; TITLE=$1 ;;
  43         --body)
  44                 shift; BODY=$1 ;;
  45         --git-arg)
  46                 shift; ARGS="$ARGS $1" ;;
  47         --version)
  48                 echo "$PROGRAM_NAME version $PROGRAM_VERSION"
  49                 exit ;;
  50         --?*)
  51                 echo "$0: unknown option $1" >&2
  52                 exit 255 ;;
  53         --)
  54                 shift; break ;;
  55         *)
  56                 break ;;
  57         esac
  58         shift
  59 done
  60 # setup
  61 NL='
  62 '
  63 TMPDIR=$(mktemp -d)
  64 WRKDIR=$(pwd)
  65 # git repository check
  66 cd "$GIT_WORK_TREE" &&
  67 { test -d .git || git rev-parse --git-dir >/dev/null; } ||
  68 {
  69         echo "$0: error not in a git repository" >&2
  70         exit 255
  71 }
  72 test -z "$(git status --porcelain)" &&
  73 git update-index -q --refresh ||
  74 {
  75         echo "$0: unstaged files or dirty index" >&2
  76         exit 254
  77 }
  78
  79 # main
  80 set -e
  81 for arch
  82 do
  83         cd "$WRKDIR"
  84         aunpack -X "$TMPDIR" "$arch"
  85         cd "$GIT_WORK_TREE"
  86         for file in * .*
  87         do
  88                 [ -e "$file" ] || continue
  89                 [ "$file" = "." -o "$file" = ".." -o "$file" = ".git" ] && continue
  90                 eval "$FILTER" || ( git rm -r "$file" || rm -R "$file" )
  91         done
  92         for file in "$TMPDIR"/* "$TMPDIR"/.*
  93         do
  94                 [ -e "$file" ] || continue
  95                 file=${file#$TMPDIR/}
  96                 [ "$file" = "." -o "$file" = ".." ] && continue
  97                 name=$(eval "$RENAME")
  98                 if [ -n "$name" ]
  99                 then
 100                         [ ! -e ./"$name" ] || rm -R ./"$name"
 101                         mv "$TMPDIR"/"$file" ./"$name"
 102                         git add ./"$name"
 103                 else
 104                         rm -R "$TMPDIR"/"$file"
 105                 fi
 106         done
 107         git commit -m "$(eval "$TITLE")${BODY:+$NL$BODY}" \
 108           ${DATE:+--date "$(eval "$DATE")"} $ARGS
 109 done
 110
 111 #
 112 rmdir "$TMPDIR"