update-hook: show the contents of the tag message for annotated tags

The annotated tag points at a commit, for which we show the short log. However, the tag itself contains a message, possibly release notes or hand-written change log - whatever it contains is worth showing. The tag message is extracted with

git cat-file tag $newrev | tail -q -n +5

Which is dangerously reliant on the format of the tag object being four header lines then the message. I don't like it, but I don't know of any other way of extracting the message. It's also missing any kind of support for the GPG signature.

---
 templates/hooks--update |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

index 1a60773..31e72ca 100644
@@ -231,8 +231,14 @@ case "$refname_type" in
 
 		echo ""
 		echo $LOGBEGIN
-		echo ""
 
+		# Show the content of the tag message; this might contain a change log
+		# or release notes so is worth displaying.  "tail -n +5" is there to
+		# remove the first 4 lines of the tag object, those details have
+		# already been summarised above
+		git cat-file tag $newrev | tail -q -n +5
+
+		echo ""
 		if [ -n "$prevtag" ]; then
 			git rev-list --pretty=short "$prevtag..$newrev" | git shortlog
 		else

1.5.0.3.402.g0c48

hoi :)

I think you can split at the blank line after the header.

Martin Waitz

That's a good idea; I can't think of an efficient way of doing that in shell script though. What I need is a

grep --everything-after "^$"

:-)

Andy

Dr Andy Parkins, M Eng (hons), MIET
[email protected]

	sed -e '1,/^$/d'

Portable too. ;-)

Shawn.