guilt-pop

   1 #!/bin/sh
   2 #
   3 # Copyright (c) Josef "Jeff" Sipek, 2006, 2007
   4 #
   5
   6 USAGE="[-f] [-a | --all | -n <num> | <patchname>]"
   7 . `dirname $0`/guilt
   8
   9 while [ $# -gt 0 ]; do
  10         case "$1" in
  11                 -f)
  12                         force=t
  13                         ;;
  14                 -a|--all)
  15                         all=t
  16                         ;;
  17                 -n)
  18                         num=t
  19                         ;;
  20                 *)
  21                         break
  22                         ;;
  23         esac
  24         shift
  25 done
  26
  27 # "guilt-pop" or "guilt-pop foo" or "guilt-pop -n foo"
  28 if [ -z "$all" ] && [ $# -gt 1 ]; then
  29         usage
  30 fi
  31
  32 # "guilt-pop -n foo"
  33 if [ ! -z "$num" ]; then
  34         if [ $# -gt 1 ] || [ $# -eq 0 ]; then
  35                 usage
  36         fi
  37 fi
  38
  39 # "guilt-pop -a"
  40 if [ ! -z "$all" ] && [ $# -gt 0 ]; then
  41         usage
  42 fi
  43
  44 patch="$1"
  45 [ ! -z "$all" ] && patch="-a"
  46
  47 if [ ! -s "$applied" ]; then
  48         echo "No patches applied."
  49         exit 0
  50 elif [ "$patch" = "-a" ]; then
  51         # we are supposed to pop all patches
  52
  53         sidx=`wc -l < $applied`
  54         eidx=0
  55 elif [ ! -z "$num" ]; then
  56         # we are supposed to pop a set number of patches
  57
  58         [ "$patch" -lt 0 ] && die "Invalid number of patches to pop."
  59
  60         sidx=`wc -l < $applied`
  61         eidx=`expr $sidx - $patch`
  62
  63         # catch underflow
  64         [ $eidx -lt 0 ] && eidx=0
  65         [ $eidx -eq $sidx ] && die "No patches requested to be removed."
  66 elif [ -z "$patch" ]; then
  67         # we are supposed to pop only the current patch on the stack
  68
  69         sidx=`wc -l < $applied`
  70         eidx=`expr $sidx - 1`
  71 else
  72         # we're supposed to pop only up to a patch, make sure the patch is
  73         # in the series
  74
  75         eidx=`cat $applied | grep -ne "^[0-9a-f]\{40\}:$patch\$" | cut -d: -f 1`
  76         if [ -z "$eidx" ]; then
  77                 die "Patch $patch is not in the series/is not applied"
  78         fi
  79
  80         eidx=`expr $eidx - 1`
  81         sidx=`wc -l < $applied`
  82 fi
  83
  84 # make sure that there are no unapplied changes
  85 # if we are forcing the pop, reset first
  86 if [ ! -z "$force" ]; then
  87         cd "$TOP_DIR" >&2 >/dev/null
  88         git-reset --hard
  89         cd - >&2 >/dev/null
  90 elif ! must_commit_first; then
  91         die "Uncommited changes detected. Refresh first."
  92 fi
  93
  94 l=`awk "BEGIN{n=0}(n==$eidx){print \\$0; exit}{n=n+1}END{}" < $applied`
  95
  96 pop_many_patches `echo $l | cut -d: -f1`^ `expr $sidx - $eidx`
  97
  98 p=`get_top`
  99 [ ! -z "$p" ] && echo "Now at $p." || echo "All patches popped."
 100