guilt-graph

   1 #!/bin/sh
   2 #
   3 # Copyright (c) Josef "Jeff" Sipek, 2007
   4 #
   5
   6 USAGE="[<patchname>]"
   7 . `dirname $0`/guilt
   8
   9 if [ $# -gt 1 ]; then
  10         usage
  11 fi
  12
  13 patchname="$1"
  14
  15 bottom=`git rev-parse refs/patches/$branch/$(head -1 < "$applied")`
  16 base=`git rev-parse $bottom^`
  17
  18 if [ -z "$patchname" ]; then
  19         top=`git rev-parse HEAD`
  20 else
  21         top=`grep "^$patchname$" "$applied"`
  22         if [ -z "$top" ]; then
  23                 die "Cannot find patch '$patchname'. Is it applied?"
  24         fi
  25 fi
  26
  27 getfiles()
  28 {
  29         git diff-tree -r "$1^" "$1" | tr '\t' ' ' | cut -d' ' -f6
  30 }
  31
  32 cache="$GUILT_DIR/$branch/.graphcache.$$"
  33 mkdir "$cache"
  34 trap "rm -rf \"$cache\"" 0
  35
  36 disp "digraph G {"
  37
  38 current="$top"
  39
  40 while [ "$current" != "$base" ]; do
  41         pname=`git show-ref | sed -n -e "
  42 /^$current refs\/patches\/$branch/ {
  43         s,^$current refs/patches/$branch/,,
  44         p
  45         q
  46 }"`
  47         [ -z "$pname" ] && pname="?"
  48
  49         disp "# checking rev $current"
  50         disp "  \"$current\" [label=\"$pname\"]"
  51
  52         # new "hash table"
  53         rm -f "$cache/dep"
  54         touch "$cache/dep"
  55
  56         getfiles $current | while read f; do
  57                 # hash the filename
  58                 fh=`echo "$f" | sha1sum | cut -d' ' -f1`
  59                 if [ -e "$cache/$fh" ]; then
  60                         # ok, something already touched this file before us
  61                         cat "$cache/$fh" >> "$cache/dep"
  62                 fi
  63                 echo "$current" > "$cache/$fh"
  64         done
  65
  66         sort -u "$cache/dep" | while read h; do
  67                 disp "  \"$h\" -> \"$current\"; // ?"
  68         done
  69
  70         current=`git rev-parse $current^`
  71 done
  72
  73 disp "}"