guilt-repair

   1 #!/bin/sh
   2 #
   3 # Copyright (c) Josef "Jeff" Sipek, 2008-2011
   4 #
   5
   6 DO_NOT_CHECK_STATUS_FILE_FORMAT=1
   7
   8 USAGE="--full | --status"
   9 if [ -z "$GUILT_VERSION" ]; then
  10         echo "Invoking `basename $0` directly is no longer supported." >&2
  11         exit 1
  12 fi
  13
  14 safety_abort()
  15 {
  16         die "Please read the man page first. (you need to specify repair mode to proceed)."
  17 }
  18
  19 #
  20 # Check whether status file needs fixing/upgrading. If not, just return,
  21 # otherwise proceed to rewrite the status file and set up proper refs
  22 #
  23 repair_status()
  24 {
  25         _disp "Checking status file format..."
  26         if ! grep "^[0-9a-f]\{40\}:" "$applied" > /dev/null ; then
  27                 disp "ok; no upgrade necessary."
  28                 return 0
  29         fi
  30         disp "old; about to upgrade."
  31
  32         # we got an old format status file
  33
  34         printf "" > "$applied.new"
  35
  36         cat "$applied" | while read line ; do
  37                 hash=`echo "$line" | cut -d: -f1`
  38                 pname=`echo "$line" | cut -d: -f2-`
  39
  40                 npname=`echo "$pname" | sed -e 's/ /-/g'`
  41                 [ "$pname" != "$npname" -a -e "$npname" ] && die "Patch name collision"
  42
  43                 git update-ref "refs/patches/$branch/$npname" "$hash"
  44                 echo "$npname" >> "$applied.new"
  45
  46                 if [ "$pname" != "$npname" ]; then
  47                         series_rename_patch "$pname" "$npname"
  48
  49                         mv "$GUILT_DIR/$branch/$pname" "$GUILT_DIR/$branch/$npname"
  50                 fi
  51         done
  52
  53         # replace the status file
  54         mv "$applied" "$applied~"
  55         mv "$applied.new" "$applied"
  56
  57         disp "Upgrade complete."
  58
  59         return 0
  60 }
  61
  62 #
  63 # Pop all patches - forcefully.
  64 #
  65 repair_pushed()
  66 {
  67         if [ -s "$applied" ]; then
  68                 # there were some patches applied
  69                 newrev=`git rev-parse refs/patches/$branch/$(head_n 1 < "$applied")^`
  70         else
  71                 # no patches were applied, but let's do all the work anyway
  72                 newrev="$oldrev"
  73         fi
  74
  75         disp "Current  HEAD commit $oldrev"
  76         disp "New      HEAD commit $newrev"
  77
  78         disp "About to forcefully pop all patches..."
  79         _disp "Are you sure you want to proceed? [y/N] "
  80         read n
  81         if [ "$n" != "y" ] && [ "$n" != "Y" ]; then
  82                 die "Aborting..."
  83         fi
  84
  85         # blow away any commits
  86         git reset --hard "$newrev" > /dev/null
  87
  88         # blow away the applied stack
  89         remove_patch_refs < "$applied"
  90         printf "" > "$applied"
  91
  92         disp "Patches should be popped."
  93         return 0
  94 }
  95
  96 _main() {
  97
  98 [ $# -ne 1 ] && safety_abort
  99
 100 case "$1" in
 101         --full)
 102                 repair="full"
 103                 ;;
 104         --status)
 105                 repair="status"
 106                 ;;
 107         --autotag)
 108                 echo "Autotagging is no longer supported" >&2
 109                 ;;
 110         *)
 111                 usage
 112                 ;;
 113 esac
 114
 115 oldrev=`git show-ref -s "refs/heads/$branch"`
 116
 117 case "$repair" in
 118         full)
 119                 repair_status
 120                 repair_pushed
 121                 ;;
 122         status)
 123                 repair_status
 124                 ;;
 125         *)
 126                 die "Internal error"
 127                 ;;
 128 esac
 129
 130 disp "Repair complete."
 131 exit 0
 132
 133 }