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Contents
module Nugrant
module Helper
module Env
##
# A namer is a lambda taking as argument an array of segments
# that should return a string representation of those segments.
# How the segments are transformed to a string is up to the
# namer. By using various namer, we can change how a bag key
# is transformed into and environment variable name. This is
# like the strategy pattern.
#
module Namer
##
# Returns the default namer, which join segments together
# using a character and upcase the result.
#
# @param `char` The character used to join segments together, default to `"_"`.
#
# @return A lambda that will simply joins segment using the `char` argument
# and upcase the result.
#
def self.default(char = "_")
lambda do |segments|
segments.join(char).upcase()
end
end
##
# Returns the prefix namer, which add a prefix to segments
# and delegate its work to another namer.
#
# @param prefix The prefix to add to segments.
# @param delegate_namer A namer that will be used to transform the prefixed segments.
#
# @return A lambda that will simply add prefix to segments and will call
# the delegate_namer with those new segments.
#
def self.prefix(prefix, delegate_namer)
lambda do |segments|
delegate_namer.call([prefix] + segments)
end
end
end
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems