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" >"$state_dir/msgnum"
  53 }
  54
  55 call_merge () {
  56         cmt="$(cat "$state_dir/cmt.$1")"
  57         echo "$cmt" > "$state_dir/current"
  58         hd=$(git rev-parse --verify HEAD)
  59         cmt_name=$(git symbolic-ref HEAD 2> /dev/null || echo HEAD)
  60         msgnum=$(cat "$state_dir/msgnum")
  61         eval GITHEAD_$cmt='"${cmt_name##refs/heads/}~$(($end - $msgnum))"'
  62         eval GITHEAD_$hd='$onto_name'
  63         export GITHEAD_$cmt GITHEAD_$hd
  64         if test -n "$GIT_QUIET"
  65         then
  66                 GIT_MERGE_VERBOSITY=1 && export GIT_MERGE_VERBOSITY
  67         fi
  68         test -z "$strategy" && strategy=recursive
  69         eval 'git-merge-$strategy' $strategy_opts '"$cmt^" -- "$hd" "$cmt"'
  70         rv=$?
  71         case "$rv" in
  72         0)
  73                 unset GITHEAD_$cmt GITHEAD_$hd
  74                 return
  75                 ;;
  76         1)
  77                 git rerere $allow_rerere_autoupdate
  78                 die "$resolvemsg"
  79                 ;;
  80         2)
  81                 echo "Strategy: $strategy failed, try another" 1>&2
  82                 die "$resolvemsg"
  83                 ;;
  84         *)
  85                 die "Unknown exit code ($rv) from command:" \
  86                         "git-merge-$strategy $cmt^ -- HEAD $cmt"
  87                 ;;
  88         esac
  89 }
  90
  91 finish_rb_merge () {
  92         move_to_original_branch
  93         if test -s "$state_dir"/rewritten
  94         then
  95                 git notes copy --for-rewrite=rebase <"$state_dir"/rewritten
  96                 if test -x "$GIT_DIR"/hooks/post-rewrite
  97                 then
  98                         "$GIT_DIR"/hooks/post-rewrite rebase <"$state_dir"/rewritten
  99                 fi
 100         fi
 101         say All done.
 102 }
 103
 104 # The whole contents of this file is run by dot-sourcing it from
 105 # inside a shell function.  It used to be that "return"s we see
 106 # below were not inside any function, and expected to return
 107 # to the function that dot-sourced us.
 108 #
 109 # However, FreeBSD /bin/sh misbehaves on such a construct and
 110 # continues to run the statements that follow such a "return".
 111 # As a work-around, we introduce an extra layer of a function
 112 # here, and immediately call it after defining it.
 113 git_rebase__merge () {
 114
 115 case "$action" in
 116 continue)
 117         read_state
 118         continue_merge
 119         while test "$msgnum" -le "$end"
 120         do
 121                 call_merge "$msgnum"
 122                 continue_merge
 123         done
 124         finish_rb_merge
 125         return
 126         ;;
 127 skip)
 128         read_state
 129         git rerere clear
 130         msgnum=$(($msgnum + 1))
 131         while test "$msgnum" -le "$end"
 132         do
 133                 call_merge "$msgnum"
 134                 continue_merge
 135         done
 136         finish_rb_merge
 137         return
 138         ;;
 139 esac
 140
 141 mkdir -p "$state_dir"
 142 echo "$onto_name" > "$state_dir/onto_name"
 143 write_basic_state
 144
 145 msgnum=0
 146 for cmt in `git rev-list --reverse --no-merges "$revisions"`
 147 do
 148         msgnum=$(($msgnum + 1))
 149         echo "$cmt" > "$state_dir/cmt.$msgnum"
 150 done
 151
 152 echo 1 >"$state_dir/msgnum"
 153 echo $msgnum >"$state_dir/end"
 154
 155 end=$msgnum
 156 msgnum=1
 157
 158 while test "$msgnum" -le "$end"
 159 do
 160         call_merge "$msgnum"
 161         continue_merge
 162 done
 163
 164 finish_rb_merge
 165
 166 }
 167 # ... and then we call the whole thing.
 168 git_rebase__merge