lib-src/vcdiff

   1 #! /bin/sh
   2 #
   3 # Enhanced sccs diff utility for use with vc mode.
   4 # This version is more compatible with rcsdiff(1).
   5 #
   6 # Copyright (C) 1992, 1993, 1995, 1997, 2001, 2002, 2003, 2004,
   7 #               2005, 2006, 2007, 2008 Free Software Foundation, Inc.
   8 #
   9 # This file is part of GNU Emacs.
  10 #
  11 # GNU Emacs is free software; you can redistribute it and/or modify
  12 # it under the terms of the GNU General Public License as published by
  13 # the Free Software Foundation; either version 3, or (at your option)
  14 # any later version.
  15 #
  16 # GNU Emacs is distributed in the hope that it will be useful,
  17 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 # GNU General Public License for more details.
  20 #
  21 # You should have received a copy of the GNU General Public License
  22 # along with GNU Emacs; see the file COPYING.  If not, write to the
  23 # Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  24 # Boston, MA 02110-1301, USA.
  25 #
  26
  27 DIFF="diff"
  28 usage="$0: Usage: vcdiff [--brief] [-q] [-r<sid1>] [-r<sid2>] [diffopts] sccsfile..."
  29
  30 PATH=$PATH:/usr/ccs/bin:/usr/sccs:/usr/xpg4/bin # common SCCS hangouts
  31
  32 echo="echo"
  33 sid1= sid2=
  34
  35 for f
  36 do
  37         case $f in
  38         -*)
  39                 case $f in
  40                 --brief)
  41                         DIFF=cmp;;
  42                 -q)
  43                         echo=:;;
  44                 -r?*)
  45                         case $sid1 in
  46                         '')
  47                                 sid1=$f
  48                                 ;;
  49                         *)
  50                                 case $sid2 in
  51                                 ?*) echo "$usage" >&2; exit 2 ;;
  52                                 esac
  53                                 sid2=$f
  54                                 ;;
  55                         esac
  56                         ;;
  57                 *)
  58                         options="$options $f"
  59                         ;;
  60                 esac
  61                 shift
  62                 ;;
  63         *)
  64                 break
  65                 ;;
  66         esac
  67 done
  68
  69 case $# in
  70 0)
  71         echo "$usage" >&2
  72         exit 2
  73 esac
  74
  75
  76 rev1= rev2= status=0
  77 trap 'status=2; exit' 1 2 13 15
  78 trap 'rm -f $rev1 $rev2 || status=2; exit $status' 0
  79
  80 for f
  81 do
  82         s=2
  83
  84         case $f in
  85         s.* | */s.*)
  86                 if
  87                         rev1=/tmp/geta$$
  88                         get -s -p -k $sid1 "$f" > $rev1 &&
  89                         case $sid2 in
  90                         '')
  91                                 workfile=`expr " /$f" : '.*/s.\(.*\)'`
  92                                 ;;
  93                         *)
  94                                 rev2=/tmp/getb$$
  95                                 get -s -p -k $sid2 "$f" > $rev2
  96                                 workfile=$rev2
  97                         esac
  98                 then
  99                         $echo $DIFF $options $rev1 $workfile >&2
 100                         $DIFF $options $rev1 $workfile
 101                         s=$?
 102                 fi
 103                 ;;
 104         *)
 105                 echo "$0: $f is not an SCCS file" >&2
 106         esac
 107
 108         if test $status -lt $s
 109         then status=$s
 110         fi
 111 done
 112
 113 # arch-tag: 4344ba3a-bcbe-4f77-971c-f43c1606953a