46 lines
1.2 KiB
Ruby
46 lines
1.2 KiB
Ruby
module Vagrant
|
|
module Util
|
|
# This allows for hash options to be overridden by a scope key
|
|
# prefix. An example speaks best here. Imagine the following hash:
|
|
#
|
|
# original = {
|
|
# :id => "foo",
|
|
# :mitchellh__id => "bar",
|
|
# :mitchellh__other => "foo"
|
|
# }
|
|
#
|
|
# scoped = scoped_hash_override(original, "mitchellh")
|
|
#
|
|
# scoped == {
|
|
# :id => "bar",
|
|
# :other => "foo"
|
|
# }
|
|
#
|
|
module ScopedHashOverride
|
|
def scoped_hash_override(original, scope)
|
|
# Convert the scope to a string in case a symbol was given since
|
|
# we use string comparisons for everything.
|
|
scope = scope.to_s
|
|
|
|
# Shallow copy the hash for the result
|
|
result = original.dup
|
|
|
|
original.each do |key, value|
|
|
parts = key.to_s.split("__", 2)
|
|
|
|
# If we don't have the proper parts, then bail
|
|
next if parts.length != 2
|
|
|
|
# If this is our scope, then override
|
|
if parts[0] == scope
|
|
result[parts[1].to_sym] = value
|
|
result.delete(key)
|
|
end
|
|
end
|
|
|
|
result
|
|
end
|
|
end
|
|
end
|
|
end
|