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"} $allow_empty_message \
  31                         --no-verify -C "$cmt"
  32                 then
  33                         echo "Commit failed, please do not call \"git commit\""
  34                         echo "directly, but instead do one of the following: "
  35                         die "$resolvemsg"
  36                 fi
  37                 if test -z "$GIT_QUIET"
  38                 then
  39                         printf "Committed: %0${prec}d " $msgnum
  40                 fi
  41                 echo "$cmt $(git rev-parse HEAD^0)" >> "$state_dir/rewritten"
  42         else
  43                 if test -z "$GIT_QUIET"
  44                 then
  45                         printf "Already applied: %0${prec}d " $msgnum
  46                 fi
  47         fi
  48         test -z "$GIT_QUIET" &&
  49         GIT_PAGER='' git log --format=%s -1 "$cmt"
  50
  51         # onto the next patch:
  52         msgnum=$(($msgnum + 1))
  53         echo "$msgnum" >"$state_dir/msgnum"
  54 }
  55
  56 call_merge () {
  57         msgnum="$1"
  58         echo "$msgnum" >"$state_dir/msgnum"
  59         cmt="$(cat "$state_dir/cmt.$msgnum")"
  60         echo "$cmt" > "$state_dir/current"
  61         git update-ref REBASE_HEAD "$cmt"
  62         hd=$(git rev-parse --verify HEAD)
  63         cmt_name=$(git symbolic-ref HEAD 2> /dev/null || echo HEAD)
  64         eval GITHEAD_$cmt='"${cmt_name##refs/heads/}~$(($end - $msgnum))"'
  65         eval GITHEAD_$hd='$onto_name'
  66         export GITHEAD_$cmt GITHEAD_$hd
  67         if test -n "$GIT_QUIET"
  68         then
  69                 GIT_MERGE_VERBOSITY=1 && export GIT_MERGE_VERBOSITY
  70         fi
  71         test -z "$strategy" && strategy=recursive
  72         # If cmt doesn't have a parent, don't include it as a base
  73         base=$(git rev-parse --verify --quiet $cmt^)
  74         eval 'git-merge-$strategy' $strategy_opts $base ' -- "$hd" "$cmt"'
  75         rv=$?
  76         case "$rv" in
  77         0)
  78                 unset GITHEAD_$cmt GITHEAD_$hd
  79                 return
  80                 ;;
  81         1)
  82                 git rerere $allow_rerere_autoupdate
  83                 die "$resolvemsg"
  84                 ;;
  85         2)
  86                 echo "Strategy: $strategy failed, try another" 1>&2
  87                 die "$resolvemsg"
  88                 ;;
  89         *)
  90                 die "Unknown exit code ($rv) from command:" \
  91                         "git-merge-$strategy $cmt^ -- HEAD $cmt"
  92                 ;;
  93         esac
  94 }
  95
  96 finish_rb_merge () {
  97         move_to_original_branch
  98         if test -s "$state_dir"/rewritten
  99         then
 100                 git notes copy --for-rewrite=rebase <"$state_dir"/rewritten
 101                 hook="$(git rev-parse --git-path hooks/post-rewrite)"
 102                 test -x "$hook" && "$hook" rebase <"$state_dir"/rewritten
 103         fi
 104         say All done.
 105 }
 106
 107 # The whole contents of this file is run by dot-sourcing it from
 108 # inside a shell function.  It used to be that "return"s we see
 109 # below were not inside any function, and expected to return
 110 # to the function that dot-sourced us.
 111 #
 112 # However, older (9.x) versions of FreeBSD /bin/sh misbehave on such a
 113 # construct and continue to run the statements that follow such a "return".
 114 # As a work-around, we introduce an extra layer of a function
 115 # here, and immediately call it after defining it.
 116 git_rebase__merge () {
 117
 118 case "$action" in
 119 continue)
 120         read_state
 121         continue_merge
 122         while test "$msgnum" -le "$end"
 123         do
 124                 call_merge "$msgnum"
 125                 continue_merge
 126         done
 127         finish_rb_merge
 128         return
 129         ;;
 130 skip)
 131         read_state
 132         git rerere clear
 133         msgnum=$(($msgnum + 1))
 134         while test "$msgnum" -le "$end"
 135         do
 136                 call_merge "$msgnum"
 137                 continue_merge
 138         done
 139         finish_rb_merge
 140         return
 141         ;;
 142 show-current-patch)
 143         exec git show REBASE_HEAD --
 144         ;;
 145 esac
 146
 147 mkdir -p "$state_dir"
 148 echo "$onto_name" > "$state_dir/onto_name"
 149 write_basic_state
 150 rm -f "$(git rev-parse --git-path REBASE_HEAD)"
 151
 152 msgnum=0
 153 for cmt in $(git rev-list --reverse --no-merges "$revisions")
 154 do
 155         msgnum=$(($msgnum + 1))
 156         echo "$cmt" > "$state_dir/cmt.$msgnum"
 157 done
 158
 159 echo 1 >"$state_dir/msgnum"
 160 echo $msgnum >"$state_dir/end"
 161
 162 end=$msgnum
 163 msgnum=1
 164
 165 while test "$msgnum" -le "$end"
 166 do
 167         call_merge "$msgnum"
 168         continue_merge
 169 done
 170
 171 finish_rb_merge
 172
 173 }
 174 # ... and then we call the whole thing.
 175 git_rebase__merge