git-notes.sh

   1 #!/bin/sh
   2
   3 USAGE="(edit | show) [commit]"
   4 . git-sh-setup
   5
   6 test -n "$3" && usage
   7
   8 test -z "$1" && usage
   9 ACTION="$1"; shift
  10
  11 test -z "$GIT_NOTES_REF" && GIT_NOTES_REF="$(git config core.notesref)"
  12 test -z "$GIT_NOTES_REF" && GIT_NOTES_REF="refs/notes/commits"
  13
  14 COMMIT=$(git rev-parse --verify --default HEAD "$@") ||
  15 die "Invalid commit: $@"
  16
  17 MESSAGE="$GIT_DIR"/new-notes-$COMMIT
  18 trap '
  19         test -f "$MESSAGE" && rm "$MESSAGE"
  20 ' 0
  21
  22 case "$ACTION" in
  23 edit)
  24         GIT_NOTES_REF= git log -1 $COMMIT | sed "s/^/#/" > "$MESSAGE"
  25
  26         GIT_INDEX_FILE="$MESSAGE".idx
  27         export GIT_INDEX_FILE
  28
  29         CURRENT_HEAD=$(git show-ref "$GIT_NOTES_REF" | cut -f 1 -d ' ')
  30         if [ -z "$CURRENT_HEAD" ]; then
  31                 PARENT=
  32         else
  33                 PARENT="-p $CURRENT_HEAD"
  34                 git read-tree "$GIT_NOTES_REF" || die "Could not read index"
  35                 git cat-file blob :$COMMIT >> "$MESSAGE" 2> /dev/null
  36         fi
  37
  38         ${VISUAL:-${EDITOR:-vi}} "$MESSAGE"
  39
  40         grep -v ^# < "$MESSAGE" | git stripspace > "$MESSAGE".processed
  41         mv "$MESSAGE".processed "$MESSAGE"
  42         if [ -s "$MESSAGE" ]; then
  43                 BLOB=$(git hash-object -w "$MESSAGE") ||
  44                         die "Could not write into object database"
  45                 git update-index --add --cacheinfo 0644 $BLOB $COMMIT ||
  46                         die "Could not write index"
  47         else
  48                 test -z "$CURRENT_HEAD" &&
  49                         die "Will not initialise with empty tree"
  50                 git update-index --force-remove $COMMIT ||
  51                         die "Could not update index"
  52         fi
  53
  54         TREE=$(git write-tree) || die "Could not write tree"
  55         NEW_HEAD=$(echo Annotate $COMMIT | git commit-tree $TREE $PARENT) ||
  56                 die "Could not annotate"
  57         git update-ref -m "Annotate $COMMIT" \
  58                 "$GIT_NOTES_REF" $NEW_HEAD $CURRENT_HEAD
  59 ;;
  60 show)
  61         git show "$GIT_NOTES_REF":$COMMIT
  62 ;;
  63 *)
  64         usage
  65 esac