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class String
def undent
gsub(/^.{#{slice(/^ +/).length}}/, '')
end
# eg:
# if foo then <<-EOS.undent_________________________________________________________72
# Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do
# eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad
# minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip
# ex ea commodo consequat. Duis aute irure dolor in reprehenderit in
# voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur
# sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt
# mollit anim id est laborum.
# EOS
alias_method :undent_________________________________________________________72, :undent
unless String.method_defined?(:start_with?)
def start_with? prefix
prefix = prefix.to_s
self[0, prefix.length] == prefix
end
end
# String.chomp, but if result is empty: returns nil instead.
# Allows `chuzzle || foo` short-circuits.
def chuzzle
s = chomp
s unless s.empty?
end
end
class NilClass
def chuzzle; end
end
# used by the inreplace function (in utils.rb)
module StringInreplaceExtension
# Warn if nothing was replaced
def gsub! before, after, audit_result=true
sub = super(before, after)
if audit_result and sub.nil?
opoo "inreplace: replacement of '#{before}' with '#{after}' failed"
end
return sub
end
# Looks for Makefile style variable defintions and replaces the
# value with "new_value", or removes the definition entirely.
def change_make_var! flag, new_value
new_value = "#{flag}=#{new_value}"
sub = gsub! Regexp.new("^#{flag}[ \\t]*=[ \\t]*(.*)$"), new_value, false
opoo "inreplace: changing '#{flag}' to '#{new_value}' failed" if sub.nil?
end
# Removes variable assignments completely.
def remove_make_var! flags
Array(flags).each do |flag|
# Also remove trailing \n, if present.
sub = gsub! Regexp.new("^#{flag}[ \\t]*=(.*)$\n?"), "", false
opoo "inreplace: removing '#{flag}' failed" if sub.nil?
end
end
# Finds the specified variable
def get_make_var flag
m = match Regexp.new("^#{flag}[ \\t]*=[ \\t]*(.*)$")
return m[1] if m
end
end
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