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module Fission
class UI
# Internal: Returns the stdout value.
attr_reader :stdout
# Internal: Initialize a UI object.
#
# stdout - The object to use for stdout (default: $stdout). This provides
# an easy way to capture/silence output if needed.
#
# Examples
#
# Fission::UI.new
#
# str_io = StringIO.new
# Fission::UI.new str_io
def initialize(stdout=$stdout)
@stdout = stdout
end
# Internal: Outputs the specified argument to the configured stdout object.
# The 'puts' method will be called on the stdout object.
#
# s - The String to output.
#
# Examples
#
# ui.output "foo bar\n"
#
# Returns nothing.
def output(s)
@stdout.puts s
end
# Internal: Outputs the specified arguments printf style. The 'printf'
# method will be called on the stdout object. Currently, this assuems there
# are two data items.
#
# string - The printf String.
# key - The String for the first data item.
# value - The String for the second data item.
#
# Examples
#
# ui.output_printf "%s %s\n", 'foo', bar
#
# Returns nothing.
def output_printf(string, key, value)
@stdout.send :printf, string, key, value
end
# Internal: Outputs the specified argument to the configured stdout object
# and exits with the specified exit code.
#
# s - The String to output.
# exit_code - The Integer exit code.
#
# Examples
#
# ui.output_and_exit 'something went wrong', 99
#
# ui.output_and_exit 'all done', 0
#
# Returns nothing.
def output_and_exit(s, exit_code)
output s
exit exit_code
end
end
end
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