git-rebase--merge.sh

   1 # This shell script fragment is sourced by git-rebase to implement
   2 # its merge-based non-interactive mode that copes well with renamed
   3 # files.
   4 #
   5 # Copyright (c) 2010 Junio C Hamano.
   6 #
   7
   8 prec=4
   9
  10 read_state () {
  11         onto_name=$(cat "$state_dir"/onto_name) &&
  12         end=$(cat "$state_dir"/end) &&
  13         msgnum=$(cat "$state_dir"/msgnum)
  14 }
  15
  16 continue_merge () {
  17         test -d "$state_dir" || die "$state_dir directory does not exist"
  18
  19         unmerged=$(git ls-files -u)
  20         if test -n "$unmerged"
  21         then
  22                 echo "You still have unmerged paths in your index"
  23                 echo "did you forget to use git add?"
  24                 die "$resolvemsg"
  25         fi
  26
  27         cmt=`cat "$state_dir/current"`
  28         if ! git diff-index --quiet --ignore-submodules HEAD --
  29         then
  30                 if ! git commit ${gpg_sign_opt:+"$gpg_sign_opt"} --no-verify -C "$cmt"
  31                 then
  32                         echo "Commit failed, please do not call \"git commit\""
  33                         echo "directly, but instead do one of the following: "
  34                         die "$resolvemsg"
  35                 fi
  36                 if test -z "$GIT_QUIET"
  37                 then
  38                         printf "Committed: %0${prec}d " $msgnum
  39                 fi
  40                 echo "$cmt $(git rev-parse HEAD^0)" >> "$state_dir/rewritten"
  41         else
  42                 if test -z "$GIT_QUIET"
  43                 then
  44                         printf "Already applied: %0${prec}d " $msgnum
  45                 fi
  46         fi
  47         test -z "$GIT_QUIET" &&
  48         GIT_PAGER='' git log --format=%s -1 "$cmt"
  49
  50         # onto the next patch:
  51         msgnum=$(($msgnum + 1))
  52         echo "$msgnum" >"$state_dir/msgnum"
  53 }
  54
  55 call_merge () {
  56         msgnum="$1"
  57         echo "$msgnum" >"$state_dir/msgnum"
  58         cmt="$(cat "$state_dir/cmt.$msgnum")"
  59         echo "$cmt" > "$state_dir/current"
  60         hd=$(git rev-parse --verify HEAD)
  61         cmt_name=$(git symbolic-ref HEAD 2> /dev/null || echo HEAD)
  62         eval GITHEAD_$cmt='"${cmt_name##refs/heads/}~$(($end - $msgnum))"'
  63         eval GITHEAD_$hd='$onto_name'
  64         export GITHEAD_$cmt GITHEAD_$hd
  65         if test -n "$GIT_QUIET"
  66         then
  67                 GIT_MERGE_VERBOSITY=1 && export GIT_MERGE_VERBOSITY
  68         fi
  69         test -z "$strategy" && strategy=recursive
  70         eval 'git-merge-$strategy' $strategy_opts '"$cmt^" -- "$hd" "$cmt"'
  71         rv=$?
  72         case "$rv" in
  73         0)
  74                 unset GITHEAD_$cmt GITHEAD_$hd
  75                 return
  76                 ;;
  77         1)
  78                 git rerere $allow_rerere_autoupdate
  79                 die "$resolvemsg"
  80                 ;;
  81         2)
  82                 echo "Strategy: $strategy failed, try another" 1>&2
  83                 die "$resolvemsg"
  84                 ;;
  85         *)
  86                 die "Unknown exit code ($rv) from command:" \
  87                         "git-merge-$strategy $cmt^ -- HEAD $cmt"
  88                 ;;
  89         esac
  90 }
  91
  92 finish_rb_merge () {
  93         move_to_original_branch
  94         if test -s "$state_dir"/rewritten
  95         then
  96                 git notes copy --for-rewrite=rebase <"$state_dir"/rewritten
  97                 if test -x "$GIT_DIR"/hooks/post-rewrite
  98                 then
  99                         "$GIT_DIR"/hooks/post-rewrite rebase <"$state_dir"/rewritten
 100                 fi
 101         fi
 102         say All done.
 103 }
 104
 105 # The whole contents of this file is run by dot-sourcing it from
 106 # inside a shell function.  It used to be that "return"s we see
 107 # below were not inside any function, and expected to return
 108 # to the function that dot-sourced us.
 109 #
 110 # However, FreeBSD /bin/sh misbehaves on such a construct and
 111 # continues to run the statements that follow such a "return".
 112 # As a work-around, we introduce an extra layer of a function
 113 # here, and immediately call it after defining it.
 114 git_rebase__merge () {
 115
 116 case "$action" in
 117 continue)
 118         read_state
 119         continue_merge
 120         while test "$msgnum" -le "$end"
 121         do
 122                 call_merge "$msgnum"
 123                 continue_merge
 124         done
 125         finish_rb_merge
 126         return
 127         ;;
 128 skip)
 129         read_state
 130         git rerere clear
 131         msgnum=$(($msgnum + 1))
 132         while test "$msgnum" -le "$end"
 133         do
 134                 call_merge "$msgnum"
 135                 continue_merge
 136         done
 137         finish_rb_merge
 138         return
 139         ;;
 140 esac
 141
 142 mkdir -p "$state_dir"
 143 echo "$onto_name" > "$state_dir/onto_name"
 144 write_basic_state
 145
 146 msgnum=0
 147 for cmt in `git rev-list --reverse --no-merges "$revisions"`
 148 do
 149         msgnum=$(($msgnum + 1))
 150         echo "$cmt" > "$state_dir/cmt.$msgnum"
 151 done
 152
 153 echo 1 >"$state_dir/msgnum"
 154 echo $msgnum >"$state_dir/end"
 155
 156 end=$msgnum
 157 msgnum=1
 158
 159 while test "$msgnum" -le "$end"
 160 do
 161         call_merge "$msgnum"
 162         continue_merge
 163 done
 164
 165 finish_rb_merge
 166
 167 }
 168 # ... and then we call the whole thing.
 169 git_rebase__merge