GRADUATED

   1 #!/bin/sh
   2
   3 base=
   4 while :
   5 do
   6         case "$1" in
   7         --base=*)
   8                 base=${1#*=} ;;
   9         -*)
  10                 echo >&2 "Eh? $1"
  11                 exit 1 ;;
  12         *)
  13                 break ;;
  14         esac
  15         shift
  16 done
  17
  18 if test -z "$base"
  19 then
  20         describe=$(git describe "master")
  21         base=$(expr "$describe" : '\(.*\)-\([0-9]*\)-g[0-9a-f]*$') ||
  22         base="$describe"
  23
  24         git rev-parse --verify "$base^0" >/dev/null 2>/dev/null || {
  25             echo >&2 "Eh? where is your base?"
  26             exit 1
  27         }
  28 fi
  29
  30 topics=
  31 leftover=
  32 dothis=
  33 LF='
  34 '
  35
  36 defer () {
  37         leftover="$leftover$1$LF"
  38 }
  39
  40 dothis () {
  41         dothis="$1$LF$LF$dothis"
  42 }
  43
  44 one_topic () {
  45         topic="$1" tip="$2" date="$3"
  46         case " $topics" in *" $topic "*) return ;; esac
  47         topics="$topic$topic "
  48
  49         mergeable=no ready=no label=
  50
  51         master_count=$(git rev-list "$base..$tip" | wc -l)
  52         maint_count=$(git rev-list "maint..$tip" | wc -l)
  53
  54         test $master_count = $maint_count && mergeable=yes
  55
  56         if current=$(git rev-parse --verify -q "$topic^0") &&
  57            test "$current" = "$tip"
  58         then
  59                 ready=yes
  60                 label="$topic"
  61         elif test -z "$current"
  62         then
  63                 ready=yes
  64                 label="$tip"
  65         fi
  66
  67         case "$mergeable,$ready" in
  68         no,*)
  69                 defer "# $topic: not mergeable ($master_count vs $maint_count)"
  70                 ;;
  71         yes,no)
  72                 topic_count=$(git rev-list "$base..$current" | wc -l)
  73                 defer "# $topic: not ready ($master_count vs $topic_count)"
  74                 ;;
  75         yes,yes)
  76                 insn="$label # $master_count ($date)"
  77                 insn="$insn$LF$(git log --oneline "maint..$tip" | sed -e "s/^/# /")"
  78                 dothis "$insn"
  79                 ;;
  80         esac
  81 }
  82
  83 git log --first-parent --min-parents=2 --max-parents=2 \
  84         --format='%ci %H %P %s' "$base..master" | {
  85         while read date time zone commit parent tip subject
  86         do
  87                 topic=$(expr "$subject" : "Merge branch '\(.*\)'$") || {
  88                         echo >&2 "Cannot parse $commit ($subject)"
  89                         continue
  90                 }
  91                 one_topic "$topic" "$tip" "$date"
  92         done
  93         echo "$leftover"
  94         echo "$dothis"
  95 }