guilt-repair

   1 #!/bin/sh
   2 #
   3 # Copyright (c) Josef "Jeff" Sipek, 2008
   4 #
   5
   6 DO_NOT_CHECK_STATUS_FILE_FORMAT=1
   7
   8 USAGE="--full | --status | --autotag"
   9 . `dirname $0`/guilt
  10
  11 safety_abort()
  12 {
  13         die "Please read the man page first. (you need to specify repair mode to proceed)."
  14 }
  15
  16 [ $# -ne 1 ] && safety_abort
  17
  18 case "$1" in
  19         --full)
  20                 repair="full"
  21                 ;;
  22         --status)
  23                 repair="status"
  24                 ;;
  25         --autotag)
  26                 repair="autotag"
  27                 ;;
  28         *)
  29                 usage
  30                 ;;
  31 esac
  32
  33 oldrev=`git show-ref -s "refs/heads/$branch"`
  34
  35 #
  36 # Check whether status file needs fixing/upgrading. If not, just return,
  37 # otherwise proceed to rewrite the status file and set up proper refs
  38 #
  39 repair_status()
  40 {
  41         printf "Checking status file format..."
  42         if ! grep "^[0-9a-f]\{40\}:" "$applied" > /dev/null ; then
  43                 echo "ok; no upgrade necessary."
  44                 return 0
  45         fi
  46         echo "old; about to upgrade."
  47
  48         # we got an old format status file
  49
  50         printf "" > "$applied.new"
  51
  52         cat "$applied" | while read line ; do
  53                 hash=`echo "$line" | cut -d: -f1`
  54                 pname=`echo "$line" | cut -d: -f2-`
  55
  56                 npname=`echo "$pname" | sed -e 's/ /-/g'`
  57                 [ "$pname" != "$npname" -a -e "$npname" ] && die "Patch name collision"
  58
  59                 git update-ref "refs/patches/$branch/$npname" "$hash"
  60                 echo "$npname" >> "$applied.new"
  61
  62                 if [ "$pname" != "$npname" ]; then
  63                         series_rename_patch "$pname" "$npname"
  64
  65                         mv "$GUILT_DIR/$branch/$pname" "$GUILT_DIR/$branch/$npname"
  66                 fi
  67         done
  68
  69         # replace the status file
  70         mv "$applied" "$applied~"
  71         mv "$applied.new" "$applied"
  72
  73         echo "Upgrade complete."
  74
  75         return 0
  76 }
  77
  78 #
  79 # Pop all patches - forcefully.
  80 #
  81 repair_pushed()
  82 {
  83         if [ -s "$applied" ]; then
  84                 # there were some patches applied
  85                 newrev=`git rev-parse refs/patches/$branch/$(head -1 < "$applied")^`
  86         else
  87                 # no patches were applied, but let's do all the work anyway
  88                 newrev="$oldrev"
  89         fi
  90
  91         echo "Current  HEAD commit $oldrev"
  92         echo "New      HEAD commit $newrev"
  93
  94         echo "About to forcefully pop all patches..."
  95         echo -n "Are you sure you want to proceed? [y/N] "
  96         read n
  97         if [ "$n" != "y" ] && [ "$n" != "Y" ]; then
  98                 die "Aborting..."
  99         fi
 100
 101         # blow away any commits
 102         git reset --hard "$newrev" > /dev/null
 103
 104         # blow away the applied stack
 105         remove_patch_refs < "$applied"
 106         printf "" > "$applied"
 107
 108         # remove the ${branch}_{top,bottom,base} tags
 109         update_stack_tags "force"
 110
 111         echo "Patches should be popped."
 112         return 0
 113 }
 114
 115 # update the top/bottom/base tags
 116 repair_autotag()
 117 {
 118         update_stack_tags
 119 }
 120
 121 case "$repair" in
 122         full)
 123                 repair_status
 124                 repair_pushed
 125                 ;;
 126         status)
 127                 repair_status
 128                 ;;
 129         autotag)
 130                 repair_autotag
 131                 ;;
 132         *)
 133                 die "Internal error"
 134                 ;;
 135 esac
 136
 137 echo "Repair complete."
 138 exit 0