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 <"$state_dir"/rewritten
  97                 hook="$(git rev-parse --git-path hooks/post-rewrite)"
  98                 test -x "$hook" && "$hook" rebase <"$state_dir"/rewritten
  99         fi
 100         say All done.
 101 }
 102
 103 # The whole contents of this file is run by dot-sourcing it from
 104 # inside a shell function.  It used to be that "return"s we see
 105 # below were not inside any function, and expected to return
 106 # to the function that dot-sourced us.
 107 #
 108 # However, FreeBSD /bin/sh misbehaves on such a construct and
 109 # continues to run the statements that follow such a "return".
 110 # As a work-around, we introduce an extra layer of a function
 111 # here, and immediately call it after defining it.
 112 git_rebase__merge () {
 113
 114 case "$action" in
 115 continue)
 116         read_state
 117         continue_merge
 118         while test "$msgnum" -le "$end"
 119         do
 120                 call_merge "$msgnum"
 121                 continue_merge
 122         done
 123         finish_rb_merge
 124         return
 125         ;;
 126 skip)
 127         read_state
 128         git rerere clear
 129         msgnum=$(($msgnum + 1))
 130         while test "$msgnum" -le "$end"
 131         do
 132                 call_merge "$msgnum"
 133                 continue_merge
 134         done
 135         finish_rb_merge
 136         return
 137         ;;
 138 esac
 139
 140 mkdir -p "$state_dir"
 141 echo "$onto_name" > "$state_dir/onto_name"
 142 write_basic_state
 143
 144 msgnum=0
 145 for cmt in $(git rev-list --reverse --no-merges "$revisions")
 146 do
 147         msgnum=$(($msgnum + 1))
 148         echo "$cmt" > "$state_dir/cmt.$msgnum"
 149 done
 150
 151 echo 1 >"$state_dir/msgnum"
 152 echo $msgnum >"$state_dir/end"
 153
 154 end=$msgnum
 155 msgnum=1
 156
 157 while test "$msgnum" -le "$end"
 158 do
 159         call_merge "$msgnum"
 160         continue_merge
 161 done
 162
 163 finish_rb_merge
 164
 165 }
 166 # ... and then we call the whole thing.
 167 git_rebase__merge