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Contents
module Startback
module Support
# This method provides the `env` and `env!` methods that
# help querying environment variables easily.
module Env
# Returns an environment variable or raise an error if
# not set.
#
# The result is always a String with no leading/trailing
# spaces.
#
# If a block is given, the environment variable is yield
# and the result of the block returned.
def env!(key, default = nil, &bl)
v = ENV[key].to_s.strip
raise Startback::Error, "Missing ENV var `#{key}`" if v.empty?
env(key, default, &bl)
end
module_function :env!
# Returns an environment variable or the default value
# passed as second argument.
#
# The result is always a String with no leading/trailing
# spaces.
#
# If a block is given, the environment variable is yield
# and the result of the block returned.
def env(key, default = nil, &bl)
v = ENV[key].to_s.strip
v = v.empty? ? default : v
v = bl.call(v) if bl && v
v
end
module_function :env
end # module Env
end # module Support
end # module Startback
Version data entries
29 entries across 29 versions & 3 rubygems