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git/contrib/examples/git-notes.sh
Johan Herland cd067d3bf4 Builtin-ify git-notes
The builtin-ification includes some minor behavioural changes to the
command-line interface: It is no longer allowed to mix the -m and -F
arguments, and it is not allowed to use multiple -F options.

As part of the builtin-ification, we add the commit_notes() function
to the builtin API. This function (together with the notes.h API) can
be easily used from other builtins to manipulate the notes tree.

Also includes needed changes to t3301.

This patch has been improved by the following contributions:
- Stephen Boyd: Use die() instead of fprintf(stderr, ...) followed by exit(1)

Cc: Stephen Boyd <bebarino@gmail.com>
Signed-off-by: Johan Herland <johan@herland.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-13 19:36:13 -08:00

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#!/bin/sh
USAGE="(edit [-F <file> | -m <msg>] | show) [commit]"
. git-sh-setup
test -z "$1" && usage
ACTION="$1"; shift
test -z "$GIT_NOTES_REF" && GIT_NOTES_REF="$(git config core.notesref)"
test -z "$GIT_NOTES_REF" && GIT_NOTES_REF="refs/notes/commits"
MESSAGE=
while test $# != 0
do
case "$1" in
-m)
test "$ACTION" = "edit" || usage
shift
if test "$#" = "0"; then
die "error: option -m needs an argument"
else
if [ -z "$MESSAGE" ]; then
MESSAGE="$1"
else
MESSAGE="$MESSAGE
$1"
fi
shift
fi
;;
-F)
test "$ACTION" = "edit" || usage
shift
if test "$#" = "0"; then
die "error: option -F needs an argument"
else
if [ -z "$MESSAGE" ]; then
MESSAGE="$(cat "$1")"
else
MESSAGE="$MESSAGE
$(cat "$1")"
fi
shift
fi
;;
-*)
usage
;;
*)
break
;;
esac
done
COMMIT=$(git rev-parse --verify --default HEAD "$@") ||
die "Invalid commit: $@"
case "$ACTION" in
edit)
if [ "${GIT_NOTES_REF#refs/notes/}" = "$GIT_NOTES_REF" ]; then
die "Refusing to edit notes in $GIT_NOTES_REF (outside of refs/notes/)"
fi
MSG_FILE="$GIT_DIR/new-notes-$COMMIT"
GIT_INDEX_FILE="$MSG_FILE.idx"
export GIT_INDEX_FILE
trap '
test -f "$MSG_FILE" && rm "$MSG_FILE"
test -f "$GIT_INDEX_FILE" && rm "$GIT_INDEX_FILE"
' 0
CURRENT_HEAD=$(git show-ref "$GIT_NOTES_REF" | cut -f 1 -d ' ')
if [ -z "$CURRENT_HEAD" ]; then
PARENT=
else
PARENT="-p $CURRENT_HEAD"
git read-tree "$GIT_NOTES_REF" || die "Could not read index"
fi
if [ -z "$MESSAGE" ]; then
GIT_NOTES_REF= git log -1 $COMMIT | sed "s/^/#/" > "$MSG_FILE"
if [ ! -z "$CURRENT_HEAD" ]; then
git cat-file blob :$COMMIT >> "$MSG_FILE" 2> /dev/null
fi
core_editor="$(git config core.editor)"
${GIT_EDITOR:-${core_editor:-${VISUAL:-${EDITOR:-vi}}}} "$MSG_FILE"
else
echo "$MESSAGE" > "$MSG_FILE"
fi
grep -v ^# < "$MSG_FILE" | git stripspace > "$MSG_FILE".processed
mv "$MSG_FILE".processed "$MSG_FILE"
if [ -s "$MSG_FILE" ]; then
BLOB=$(git hash-object -w "$MSG_FILE") ||
die "Could not write into object database"
git update-index --add --cacheinfo 0644 $BLOB $COMMIT ||
die "Could not write index"
else
test -z "$CURRENT_HEAD" &&
die "Will not initialise with empty tree"
git update-index --force-remove $COMMIT ||
die "Could not update index"
fi
TREE=$(git write-tree) || die "Could not write tree"
NEW_HEAD=$(echo Annotate $COMMIT | git commit-tree $TREE $PARENT) ||
die "Could not annotate"
git update-ref -m "Annotate $COMMIT" \
"$GIT_NOTES_REF" $NEW_HEAD $CURRENT_HEAD
;;
show)
git rev-parse -q --verify "$GIT_NOTES_REF":$COMMIT > /dev/null ||
die "No note for commit $COMMIT."
git show "$GIT_NOTES_REF":$COMMIT
;;
*)
usage
esac