guilt-pop

   1 #!/bin/sh
   2 #
   3 # Copyright (c) Josef "Jeff" Sipek, 2006-2011
   4 #
   5
   6 USAGE="[-f] [-a | --all | -n <num> | <patchname>]"
   7 if [ -z "$GUILT_VERSION" ]; then
   8         echo "Invoking `basename $0` directly is no longer supported." >&2
   9         exit 1
  10 fi
  11
  12 _main() {
  13
  14 while [ $# -gt 0 ]; do
  15         case "$1" in
  16                 -f)
  17                         force=t
  18                         ;;
  19                 -a|--all)
  20                         all=t
  21                         ;;
  22                 -n)
  23                         num=t
  24                         ;;
  25                 *)
  26                         break
  27                         ;;
  28         esac
  29         shift
  30 done
  31
  32 # "guilt-pop" or "guilt-pop foo" or "guilt-pop -n foo"
  33 if [ -z "$all" ] && [ $# -gt 1 ]; then
  34         usage
  35 fi
  36
  37 # "guilt-pop -n foo"
  38 if [ ! -z "$num" ]; then
  39         if [ $# -gt 1 ] || [ $# -eq 0 ]; then
  40                 usage
  41         fi
  42 fi
  43
  44 # "guilt-pop -a"
  45 if [ ! -z "$all" ] && [ $# -gt 0 ]; then
  46         usage
  47 fi
  48
  49 patch="$1"
  50 [ ! -z "$all" ] && patch="-a"
  51
  52 if [ ! -s "$applied" ]; then
  53         disp "No patches applied."
  54         exit 0
  55 elif [ "$patch" = "-a" ]; then
  56         # we are supposed to pop all patches
  57
  58         sidx=`wc -l < $applied`
  59         eidx=0
  60 elif [ ! -z "$num" ]; then
  61         # we are supposed to pop a set number of patches
  62
  63         [ "$patch" -lt 0 ] && die "Invalid number of patches to pop."
  64
  65         sidx=`wc -l < $applied`
  66         eidx=`expr $sidx - $patch`
  67
  68         # catch underflow
  69         [ $eidx -lt 0 ] && eidx=0
  70         [ $eidx -eq $sidx ] && die "No patches requested to be removed."
  71 elif [ -z "$patch" ]; then
  72         # we are supposed to pop only the current patch on the stack
  73
  74         sidx=`wc -l < $applied`
  75         eidx=`expr $sidx - 1`
  76 else
  77         # we're supposed to pop only up to a patch, make sure the patch is
  78         # in the series
  79
  80         eidx=`cat $applied | grep -ne "^$patch$" | cut -d: -f 1`
  81         if [ -z "$eidx" ]; then
  82                 die "Patch $patch is not in the series/is not applied"
  83         fi
  84
  85         eidx=`expr $eidx - 1`
  86         sidx=`wc -l < $applied`
  87 fi
  88
  89 # make sure that there are no unapplied changes
  90 # if we are forcing the pop, reset first
  91 if [ ! -z "$force" ]; then
  92         git reset --hard
  93 elif ! must_commit_first; then
  94         die "Uncommited changes detected. Refresh first."
  95 fi
  96
  97 l=`awk "BEGIN{n=0}(n==$eidx){print \\$0; exit}{n=n+1}END{}" < $applied`
  98
  99 pop_many_patches `git rev-parse refs/patches/$branch/$l^` `expr $sidx - $eidx`
 100
 101 p=`get_top`
 102 [ ! -z "$p" ] && disp "Now at $p." || disp "All patches popped."
 103
 104 }