config: Add description of --local option

diff --git a/templates/hooks--update.sample b/templates/hooks--update.sample
index f8bf490cffa2d41d19ffc9a31839ca3c2686df16..71ab04edc09be7aeefa1e8a0f609a974ffd55a9f 100755 (executable)
--- a/templates/hooks--update.sample
+++ b/templates/hooks--update.sample
@@ -1,7 +1,7 @@
 #!/bin/sh
 #
 # An example hook script to blocks unannotated tags from entering.
-# Called by git-receive-pack with arguments: refname sha1-old sha1-new
+# Called by "git receive-pack" with arguments: refname sha1-old sha1-new
 #
 # To enable this hook, rename this file to "update".
 #
@@ -13,6 +13,9 @@
 # hooks.allowdeletetag
 #   This boolean sets whether deleting tags will be allowed in the
 #   repository.  By default they won't be.
+# hooks.allowmodifytag
+#   This boolean sets whether a tag may be modified after creation. By default
+#   it won't be.
 # hooks.allowdeletebranch
 #   This boolean sets whether deleting branches will be allowed in the
 #   repository.  By default they won't be.
@@ -44,6 +47,7 @@ allowunannotated=$(git config --bool hooks.allowunannotated)
 allowdeletebranch=$(git config --bool hooks.allowdeletebranch)
 denycreatebranch=$(git config --bool hooks.denycreatebranch)
 allowdeletetag=$(git config --bool hooks.allowdeletetag)
+allowmodifytag=$(git config --bool hooks.allowmodifytag)
 
 # check for no description
 projectdesc=$(sed -e '1q' "$GIT_DIR/description")
@@ -60,7 +64,7 @@ zero="0000000000000000000000000000000000000000"
 if [ "$newrev" = "$zero" ]; then
        newrev_type=delete
 else
-       newrev_type=$(git-cat-file -t $newrev)
+       newrev_type=$(git cat-file -t $newrev)
 fi
 
 case "$refname","$newrev_type" in
@@ -82,6 +86,12 @@ case "$refname","$newrev_type" in
                ;;
        refs/tags/*,tag)
                # annotated tag
+               if [ "$allowmodifytag" != "true" ] && git rev-parse $refname > /dev/null 2>&1
+               then
+                       echo "*** Tag '$refname' already exists." >&2
+                       echo "*** Modifying a tag is not allowed in this repository." >&2
+                       exit 1
+               fi
                ;;
        refs/heads/*,commit)
                # branch