8e0158b4d7
I'm tired of not remembering if start_with?/end_with? are portable, so just add them both if they're not defined.
82 lines
2.6 KiB
Ruby
82 lines
2.6 KiB
Ruby
class String
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def undent
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gsub(/^.{#{slice(/^ +/).length}}/, '')
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end
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# eg:
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# if foo then <<-EOS.undent_________________________________________________________72
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# Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do
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# eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad
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# minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip
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# ex ea commodo consequat. Duis aute irure dolor in reprehenderit in
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# voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur
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# sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt
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# mollit anim id est laborum.
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# EOS
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alias_method :undent_________________________________________________________72, :undent
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def start_with?(*prefixes)
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prefixes.any? do |prefix|
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if prefix.respond_to?(:to_str)
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prefix = prefix.to_str
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self[0, prefix.length] == prefix
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end
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end
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end unless method_defined?(:start_with?)
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def end_with?(*suffixes)
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suffixes.any? do |suffix|
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if suffix.respond_to?(:to_str)
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suffix = suffix.to_str
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self[-suffix.length, suffix.length] == suffix
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end
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end
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end unless method_defined?(:end_with?)
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# String.chomp, but if result is empty: returns nil instead.
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# Allows `chuzzle || foo` short-circuits.
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def chuzzle
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s = chomp
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s unless s.empty?
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end
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end
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class NilClass
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def chuzzle; end
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end
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# used by the inreplace function (in utils.rb)
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module StringInreplaceExtension
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# Warn if nothing was replaced
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def gsub! before, after, audit_result=true
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sub = super(before, after)
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if audit_result and sub.nil?
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opoo "inreplace: replacement of '#{before}' with '#{after}' failed"
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end
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return sub
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end
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# Looks for Makefile style variable defintions and replaces the
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# value with "new_value", or removes the definition entirely.
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def change_make_var! flag, new_value
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new_value = "#{flag}=#{new_value}"
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sub = gsub! Regexp.new("^#{flag}[ \\t]*=[ \\t]*(.*)$"), new_value, false
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opoo "inreplace: changing '#{flag}' to '#{new_value}' failed" if sub.nil?
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end
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# Removes variable assignments completely.
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def remove_make_var! flags
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Array(flags).each do |flag|
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# Also remove trailing \n, if present.
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sub = gsub! Regexp.new("^#{flag}[ \\t]*=(.*)$\n?"), "", false
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opoo "inreplace: removing '#{flag}' failed" if sub.nil?
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end
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end
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# Finds the specified variable
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def get_make_var flag
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m = match Regexp.new("^#{flag}[ \\t]*=[ \\t]*(.*)$")
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return m[1] if m
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end
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end
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