/usr/lib/python2.7/dist-packages/charmtools/templates/chef/files/hooks/stub is in charm-tools 2.1.2-0ubuntu4.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | #!/bin/bash
set -e
HOOK_NAME=\$(basename \$0)
CHARM_NAME=$metadata.package
if [[ "\$HOOK_NAME" == *-relation-* ]]; then
COOKBOOK_NAME="\${HOOK_NAME%-relation*}-relation"
RECIPE_NAME=\${HOOK_NAME\#*relation-}
else
COOKBOOK_NAME=\$CHARM_NAME
RECIPE_NAME=\$HOOK_NAME
fi
cd "\$(dirname \$0)" && bundle exec chef-solo -o "recipe[\$COOKBOOK_NAME::\$RECIPE_NAME]"
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