contrib/rerere-train.sh

   1 #!/bin/sh
   2 # Copyright (c) 2008, Nanako Shiraishi
   3 # Prime rerere database from existing merge commits
   4
   5 me=rerere-train
   6 USAGE="$me rev-list-args"
   7
   8 SUBDIRECTORY_OK=Yes
   9 OPTIONS_SPEC=
  10 . git-sh-setup
  11 require_work_tree
  12 cd_to_toplevel
  13
  14 # Remember original branch
  15 branch=$(git symbolic-ref -q HEAD) ||
  16 original_HEAD=$(git rev-parse --verify HEAD) || {
  17         echo >&2 "Not on any branch and no commit yet?"
  18         exit 1
  19 }
  20
  21 mkdir -p "$GIT_DIR/rr-cache" || exit
  22
  23 git rev-list --parents "$@" |
  24 while read commit parent1 other_parents
  25 do
  26         if test -z "$other_parents"
  27         then
  28                 # Skip non-merges
  29                 continue
  30         fi
  31         git checkout -q "$parent1^0"
  32         if git merge $other_parents >/dev/null 2>&1
  33         then
  34                 # Cleanly merges
  35                 continue
  36         fi
  37         if test -s "$GIT_DIR/MERGE_RR"
  38         then
  39                 git show -s --pretty=format:"Learning from %h %s" "$commit"
  40                 git rerere
  41                 git checkout -q $commit -- .
  42                 git rerere
  43         fi
  44         git reset -q --hard
  45 done
  46
  47 if test -z "$branch"
  48 then
  49         git checkout "$original_HEAD"
  50 else
  51         git checkout "${branch#refs/heads/}"
  52 fi