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