Reintegrate

   1 #!/bin/sh
   2
   3 accept_rerere="--rerere-autoupdate" generate=no update= diff= edit= stop_at_cut=
   4 while case "$#,$1" in 0,*) break;; *,-*) ;; esac
   5 do
   6         case "$1" in
   7         -n)     accept_rerere= ;;
   8         -e)     edit=t ;;
   9         -c)     stop_at_cut=1 ;;
  10         -c?*)   stop_at_cut=${1#-c} ;;
  11         -d)     update=${2?"diff with what?"}
  12                 diff=yes
  13                 generate=yes
  14                 shift ;;
  15         -u)     update=${2?"update what?"}
  16                 generate=yes
  17                 shift ;;
  18         *)      generate=yes
  19                 break ;;
  20         esac
  21         shift
  22 done
  23
  24 annotate_merge () {
  25         test -f Meta/whats-cooking.txt || return 0
  26
  27         perl -e '
  28                 sub wildo_match {
  29                         s/^\s*//;
  30                         if (/^Will (?:\S+ ){0,2}(fast-track|keep|merge|drop|discard|cook|kick|defer|be re-?rolled)[,. ]/ ||
  31                             /^Not urgent/ || /^Not ready/ || /^Waiting for / ||
  32                             /^Can wait in / ||
  33                             /^Needs? / || /^Expecting / || /^May want to /) {
  34                                 return 1;
  35                         }
  36                         return 0;
  37                 }
  38
  39                 my ($branch) = $ARGV[0];
  40                 my ($in_section, $in_desc);
  41                 my @msg = ();
  42                 while (<STDIN>) {
  43                         chomp;
  44                         if (/^\* $branch /) {
  45                                 $in_section = 1;
  46                                 next;
  47                         }
  48                         last if (/^[-*\[]/ && $in_section);
  49                         next unless $in_section;
  50                         s/^\s+//;
  51                         if (/^$/) {
  52                                 $in_desc = 1;
  53                         }
  54                         next unless ($in_section && $in_desc);
  55                         next if (/Originally merged to '\''next'\'' on ([-0-9]+)/);
  56                         next if (wildo_match($_));
  57                         push @msg, "$_\n";
  58                 }
  59
  60                 if ($in_section && @msg) {
  61                         open(my $fh, "-|", qw(git cat-file commit HEAD));
  62                         my @original = (<$fh>);
  63                         close $fh;
  64                         my @final;
  65                         $in_section = 0;
  66                         for (@original) {
  67                                 if (!$in_section) {
  68                                         $in_section = 1 if (/^$/);
  69                                         next;
  70                                 }
  71                                 if (/^Conflicts:$/ && $in_section == 2) {
  72                                         $in_section = 3;
  73                                 }
  74
  75                                 if ($in_section == 3) {
  76                                         $_ = "# $_";
  77                                 }
  78                                 push @final, $_;
  79                                 if (/^$/ && $in_section == 1) {
  80                                         push @final, @msg;
  81                                         push @final, "\n";
  82                                         $in_section = 2;
  83                                 }
  84                         }
  85                         open($fh, "|-", qw(git commit --amend -F -));
  86                         print $fh @final;
  87                         close $fh;
  88                 }
  89         ' <Meta/whats-cooking.txt "$1"
  90 }
  91
  92 case "$generate" in
  93 no)
  94         accept_rerere () {
  95                 if ! git write-tree 2>/dev/null >/dev/null
  96                 then
  97                         git rerere remaining
  98                         return 1
  99                 else
 100                         EDITOR=: git commit --no-verify
 101                         echo "Accepted previous resolution"
 102                         return 0
 103                 fi
 104         }
 105
 106         mark_cut () {
 107                 test -n "$stop_at_cut" && return
 108
 109                 count_since_last_cut=$(( $count_since_last_cut + 1 ))
 110                 test -z "$prev_cut" && return
 111                 git commit --allow-empty -m "$prev_cut"
 112                 prev_cut=
 113         }
 114
 115         cut_seen=0 prev_cut= count_since_last_cut=0
 116         while read branch eh
 117         do
 118                 case "$branch" in '###') cut_seen=$(( $cut_seen + 1 )) ;; esac
 119                 if test -n "$stop_at_cut" && test $stop_at_cut -le $cut_seen
 120                 then
 121                         continue ;# slurp the remainder and skip
 122                 fi
 123
 124                 case "$branch" in
 125                 '###')
 126                         if test "$count_since_last_cut" = 0
 127                         then
 128                                 prev_cut=
 129                         else
 130                                 echo >&2 "$branch $eh"
 131                                 prev_cut="$branch $eh"
 132                                 count_since_last_cut=0
 133                         fi
 134                         continue ;;
 135                 '#'* | '')
 136                         continue ;;
 137                 esac
 138
 139                 case "$eh" in
 140                 "" | "#"*)
 141                         echo >&2 "* $branch"
 142
 143                         save=$(git rev-parse --verify HEAD) &&
 144                         tip=$(git rev-parse --verify "$branch^0") &&
 145                         mb=$(git merge-base "$tip" "$save") ||
 146                         exit
 147
 148                         test "$mb" = "$tip" && continue
 149
 150                         mark_cut
 151
 152                         EDITOR=: git merge $accept_rerere --edit "$branch" ||
 153                         accept_rerere ||
 154                         exit
 155
 156                         annotate_merge "$branch" || exit
 157                         test -z "$edit" ||
 158                         git commit --amend || exit
 159
 160                         this=$(git rev-parse --verify HEAD)
 161                         if test "$this" = "$save"
 162                         then
 163                                 :
 164                         elif git show-ref -q --verify "refs/merge-fix/$branch"
 165                         then
 166                                 echo >&2 "Fixing up the merge"
 167                                 git cherry-pick --no-commit "refs/merge-fix/$branch" &&
 168                                 EDITOR=: git commit --amend -a || exit
 169                         fi
 170                         ;;
 171                 pick" "*)
 172                         echo >&2 "* $eh"
 173
 174                         mark_cut
 175
 176                         git cherry-pick "$branch" || exit ;;
 177                 *) echo >&2 "Eh? $branch $eh"; exit ;;
 178                 esac
 179         done
 180         exit
 181 esac
 182
 183 if test -n "$update" && test $# = 0
 184 then
 185         set x $(sed -n -e '2s/^# //p' <"$update") &&
 186         shift
 187 fi
 188
 189 # Generation (or updating)
 190
 191 x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
 192 x40="$x40$x40$x40$x40$x40$x40$x40$x40"
 193 LF='
 194 '
 195
 196 show_merge () {
 197         case "$msg" in
 198         "Merge branch '"*"'"*)
 199                 branch=$(expr "$msg" : "Merge branch '\(.*\)'")
 200                 merge_hier=heads/
 201                 ;;
 202         "Merge remote branch '"*"'"*)
 203                 branch=$(expr "$msg" : "Merge remote branch '\(.*\)'")
 204                 merge_hier=
 205                 ;;
 206         *)
 207                 echo 2>&1 "Huh?: $msg"
 208                 return
 209                 ;;
 210         esac &&
 211         tip=$(git rev-parse --verify "refs/$merge_hier$branch" 2>/dev/null) &&
 212         merged=$(git name-rev --refs="refs/$merge_hier$branch" "$other" 2>/dev/null) &&
 213         merged=$(expr "$merged" : "$x40 \(.*\)") &&
 214         test "$merged" != undefined || {
 215                 other=$(git log -1 --pretty='format:%s' $other) &&
 216                 merged="$branch :rebased? $other"
 217         }
 218 }
 219
 220 show_pick () {
 221         case "$msg" in
 222         "### "* | "###")
 223                 merged="$msg"
 224                 ;;
 225         *)
 226                 merged="$(git rev-parse --verify "$commit") pick $msg"
 227                 ;;
 228         esac
 229
 230 }
 231
 232 generate () {
 233         PROGRAM=$1
 234         shift
 235         echo '#!/bin/sh'
 236         echo "# $1"
 237         echo 'case "$#,$1" in'
 238         echo '1,-u|1,-d)'
 239         echo "  exec $PROGRAM" '"$1" "$0"'
 240         echo 'esac'
 241         echo "$PROGRAM" '"$@" <<\EOF'
 242         git log --no-decorate --pretty=oneline --first-parent "$1" |
 243         {
 244                 series=
 245                 while read commit msg
 246                 do
 247                         if other=$(git rev-parse -q --verify "$commit^2")
 248                         then
 249                                 show_merge
 250                         else
 251                                 show_pick
 252                         fi
 253
 254                         if test -z "$series"
 255                         then
 256                                 series="$merged"
 257                         else
 258                                 series="$merged$LF$series"
 259                         fi
 260                 done
 261                 echo "$series"
 262         }
 263         echo EOF
 264 }
 265
 266 if test -z "$update"
 267 then
 268         generate "$0" "$@"
 269 elif test -z "$diff"
 270 then
 271         generate "$0" "$@" | diff -w -u "$update" -
 272         if test $? = 0
 273         then
 274                 echo >&2 "No changes."
 275         else
 276                 echo >&2 -n "Update [y/N]? "
 277                 read yesno
 278                 case "$yesno" in
 279                 [Yy]*)
 280                         generate "$0" "$@" |
 281                         sed -e 's/ :rebased?.*//' >"$update" ;;
 282                 *)
 283                         echo >&2 "No update then." ;;
 284                 esac
 285         fi
 286 else
 287         generate "$0" "$@" | diff -w -u "$update" -
 288 fi