Reintegrate

   1 #!/bin/sh
   2
   3 accept_rerere=t generate=no update= diff=
   4 while case "$#,$1" in 0,*) break;; *,-*) ;; esac
   5 do
   6         case "$1" in
   7         -n)     accept_rerere= ;;
   8         -d)     update=${2?"diff with what?"}
   9                 diff=yes
  10                 generate=yes
  11                 shift ;;
  12         -u)     update=${2?"update what?"}
  13                 generate=yes
  14                 shift ;;
  15         *)      generate=yes
  16                 break ;;
  17         esac
  18         shift
  19 done
  20
  21 case "$generate" in
  22 no)
  23         accept_rerere () {
  24                 if test -z "$accept_rerere"
  25                 then
  26                         return 1
  27                 fi
  28                 if git diff |
  29                    grep -e "^.+" -e "^+." |
  30                    grep -e "^..<<<<<<<" -e "^..=======" -e "^..>>>>>>>" >/dev/null
  31                 then
  32                         return 1
  33                 else
  34                         EDITOR=: git commit -a --no-verify
  35                         echo "Accepted previous resolution"
  36                         return 0
  37                 fi
  38         }
  39
  40         while read branch eh
  41         do
  42                 case "$branch" in '#'* | '') continue ;; esac
  43                 case "$eh" in
  44                 "" | "#"*)
  45                         save=$(git rev-parse --verify HEAD)
  46
  47                         echo >&2 "* $branch"
  48                         git merge "$branch" || accept_rerere || exit
  49
  50                         this=$(git rev-parse --verify HEAD)
  51                         if test "$this" = "$save"
  52                         then
  53                                 :
  54                         elif git show-ref -q --verify "refs/merge-fix/$branch"
  55                         then
  56                                 echo >&2 "Fixing up the merge"
  57                                 git cherry-pick --no-commit "refs/merge-fix/$branch" &&
  58                                 EDITOR=: git commit --amend -a || exit
  59                         fi
  60                         ;;
  61                 pick" "*)
  62                         echo >&2 "* $eh"
  63                         git cherry-pick "$branch" || exit ;;
  64                 *) echo >&2 "Eh? $branch $eh"; exit ;;
  65                 esac
  66         done
  67         exit
  68 esac
  69
  70 if test -n "$update" && test $# = 0
  71 then
  72         set x $(sed -n -e '2s/^# //p' <"$update") &&
  73         shift
  74 fi
  75
  76 # Generation (or updating)
  77
  78 x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
  79 x40="$x40$x40$x40$x40$x40$x40$x40$x40"
  80 LF='
  81 '
  82
  83 show_merge () {
  84         case "$msg" in
  85         "Merge branch '"*"'"*)
  86                 branch=$(expr "$msg" : "Merge branch '\(.*\)'")
  87                 merge_hier=heads/
  88                 ;;
  89         "Merge remote branch '"*"'"*)
  90                 branch=$(expr "$msg" : "Merge remote branch '\(.*\)'")
  91                 merge_hier=
  92                 ;;
  93         *)
  94                 echo 2>&1 "Huh?: $msg"
  95                 return
  96                 ;;
  97         esac &&
  98         tip=$(git rev-parse --verify "refs/$merge_hier$branch" 2>/dev/null) &&
  99         merged=$(git name-rev --refs="refs/$merge_hier$branch" "$other" 2>/dev/null) &&
 100         merged=$(expr "$merged" : "$x40 \(.*\)") &&
 101         test "$merged" != undefined || {
 102                 other=$(git log -1 --pretty='format:%s' $other) &&
 103                 merged="$branch :rebased? $other"
 104         }
 105 }
 106
 107 show_pick () {
 108         merged="$(git rev-parse --verify "$commit") pick $msg"
 109 }
 110
 111 generate () {
 112         PROGRAM=$1
 113         shift
 114         echo '#!/bin/sh'
 115         echo "# $1"
 116         echo 'case "$#,$1" in'
 117         echo '1,-u|1,-d)'
 118         echo "  exec $PROGRAM" '"$1" "$0"'
 119         echo 'esac'
 120         echo "$PROGRAM" '"$@" <<\EOF'
 121         git log --pretty=oneline --first-parent "$1" |
 122         {
 123                 series=
 124                 while read commit msg
 125                 do
 126                         if other=$(git rev-parse -q --verify "$commit^2")
 127                         then
 128                                 show_merge
 129                         else
 130                                 show_pick
 131                         fi
 132
 133                         if test -z "$series"
 134                         then
 135                                 series="$merged"
 136                         else
 137                                 series="$merged$LF$series"
 138                         fi
 139                 done
 140                 echo "$series"
 141         }
 142         echo EOF
 143 }
 144
 145 if test -z "$update"
 146 then
 147         generate "$0" "$@"
 148 elif test -z "$diff"
 149 then
 150         generate "$0" "$@" | diff -u "$update" -
 151         if test $? = 0
 152         then
 153                 echo >&2 "No changes."
 154         else
 155                 echo >&2 -n "Update [y/N]? "
 156                 read yesno
 157                 case "$yesno" in
 158                 [Yy]*)
 159                         generate "$0" "$@" |
 160                         sed -e 's/ :rebased?.*//' >"$update" ;;
 161                 *)
 162                         echo >&2 "No update then." ;;
 163                 esac
 164         fi
 165 else
 166         generate "$0" "$@" | diff -u "$update" -
 167 fi