6ff61909a9
Ordinarily variable assignments in Makefiles are done simply with an unconditional assignment: the equals sign. There are variants of this: FOO := $(BAR) Avoid recursively expand variables. FOO ?= bar Assign only if $(FOO) is not already set. FOO += bar Add more to a variable. FOO != bar Execute a shell script and assign result to $(FOO). See also https://www.gnu.org/software/make/manual/html_node/Conditional-Example.html https://www.gnu.org/software/make/manual/html_node/Flavors.html
64 lines
1.7 KiB
Ruby
64 lines
1.7 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require "active_support/core_ext/object/blank"
|
|
|
|
class String
|
|
# String.chomp, but if result is empty: returns nil instead.
|
|
# Allows `chuzzle || foo` short-circuits.
|
|
# TODO: Deprecate.
|
|
def chuzzle
|
|
s = chomp
|
|
s unless s.empty?
|
|
end
|
|
end
|
|
|
|
class NilClass
|
|
# TODO: Deprecate.
|
|
def chuzzle; end
|
|
end
|
|
|
|
# Used by the inreplace function (in `utils.rb`).
|
|
module StringInreplaceExtension
|
|
attr_accessor :errors
|
|
|
|
def self.extended(str)
|
|
str.errors = []
|
|
end
|
|
|
|
def sub!(before, after)
|
|
result = super
|
|
errors << "expected replacement of #{before.inspect} with #{after.inspect}" unless result
|
|
result
|
|
end
|
|
|
|
# Warn if nothing was replaced
|
|
def gsub!(before, after, audit_result = true)
|
|
result = super(before, after)
|
|
errors << "expected replacement of #{before.inspect} with #{after.inspect}" if audit_result && result.nil?
|
|
result
|
|
end
|
|
|
|
# Looks for Makefile style variable definitions and replaces the
|
|
# value with "new_value", or removes the definition entirely.
|
|
def change_make_var!(flag, new_value)
|
|
return if gsub!(/^#{Regexp.escape(flag)}[ \t]*[\\?\+\:\!]?=[ \t]*(.*)$/, "#{flag}=#{new_value}", false)
|
|
|
|
errors << "expected to change #{flag.inspect} to #{new_value.inspect}"
|
|
end
|
|
|
|
# Removes variable assignments completely.
|
|
def remove_make_var!(flags)
|
|
Array(flags).each do |flag|
|
|
# Also remove trailing \n, if present.
|
|
if gsub!(/^#{Regexp.escape(flag)}[ \t]*[\\?\+\:\!]?=.*$\n?/, "", false)
|
|
errors << "expected to remove #{flag.inspect}"
|
|
end
|
|
end
|
|
end
|
|
|
|
# Finds the specified variable
|
|
def get_make_var(flag)
|
|
self[/^#{Regexp.escape(flag)}[ \t]*[\\?\+\:\!]?=[ \t]*(.*)$/, 1]
|
|
end
|
|
end
|