Build Target Pattern
visibilityargument of a build rule.
A build target is also a valid build target pattern that matches the build target of same name:
# Matches '//apps/myapp:app'. '//apps/myapp:app'
A build target pattern that ends with a colon matches build targets that identify other rules in the same directory:
# Matches '//apps/myapp:app_debug' and '//apps/myapp:app_release'. '//apps/myapp:'
A build target pattern that ends with
/... matches any build target that identifies a rule in a build file in or under that directory:
# Matches '//apps:common' and '//apps/myapp:app'. '//apps/...'