utils/scripts/schdiff

   1 #! /bin/sh
   2
   3 usage ()
   4 {
   5   cat <<EOF
   6 Usage: schdiff old new
   7
   8 View a graphical diff of gEDA schematics using gschem and ImageMagick.
   9
  10 Usage with git:
  11   git difftool -x schdiff ...
  12
  13 Usage with Mercurial:
  14   Add the following to .hgrc:
  15
  16     [extensions]
  17     hgext.extdiff =
  18     [extdiff]
  19     cmd.schdiff = /path/to/schdiff
  20
  21   Then use: hg schdiff ...
  22
  23 Usage with Subversion:
  24   svn diff --diff-cmd schdiff
  25
  26 Report bugs to <http://bugs.launchpad.net/geda>
  27 gEDA/gaf homepage <http://www.geda-project.org/>
  28 EOF
  29
  30 }
  31
  32 for PROG in gschem composite display
  33 do
  34   if which $PROG > /dev/null
  35   then
  36     true
  37   else
  38     echo "$PROG is not found.  Either it is not installed, or not in your PATH"
  39     exit 1
  40   fi
  41 done
  42
  43 if test $# -lt 2
  44   then usage; exit 1
  45 fi
  46
  47 #In case the script was invoked with extra option arguments, throw them away
  48 shift `expr $# - 2`
  49
  50 if test -d $1 -o -d $2
  51   then echo "ERROR: schdiff cannot diff entire directories"
  52   exit 1
  53 fi
  54
  55 LEFTFILE=$1
  56 RIGHTFILE=$2
  57
  58 GEDASCHEMEDIR=share/gEDA/scheme
  59 SCHEMEFILE=`dirname $0`/../${GEDASCHEMEDIR}/schdiff-image.scm
  60 LEFTPNG=`mktemp --tmpdir schdiff.XXXXXXXXXX`
  61 RIGHTPNG=`mktemp --tmpdir schdiff.XXXXXXXXXX`
  62 DIFFPNG=`mktemp --tmpdir schdiff.XXXXXXXXXX`
  63
  64 gschem -p -o $LEFTPNG -q -c '(image-size 1344 1008) (image-color "disabled") (gschem-use-rc-values) (gschem-image "dummyfilename") (gschem-exit)' $LEFTFILE && \
  65 gschem -p -o $RIGHTPNG -q -c '(image-size 1344 1008) (image-color "disabled") (gschem-use-rc-values) (gschem-image "dummyfilename") (gschem-exit)' $RIGHTFILE && \
  66 composite -stereo 0 $LEFTPNG $RIGHTPNG $DIFFPNG && \
  67 display $DIFFPNG
  68 rm $LEFTPNG
  69 rm $RIGHTPNG
  70 rm $DIFFPNG