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class UsageError <RuntimeError; end
class FormulaUnspecifiedError <UsageError; end
class KegUnspecifiedError <UsageError; end
module HomebrewArgvExtension
def named
@named ||= reject{|arg| arg[0..0] == '-'}
end
def options
select {|arg| arg[0..0] == '-'}
end
def formulae
require 'formula'
@formulae ||= downcased_unique_named.collect {|name| Formula.factory name}
raise FormulaUnspecifiedError if @formulae.empty?
@formulae
end
def kegs
require 'keg'
@kegs ||= downcased_unique_named.collect do |name|
d=HOMEBREW_CELLAR+name
dirs = d.children.select{ |pn| pn.directory? } rescue []
raise "#{name} is not installed" if not d.directory? or dirs.length == 0
raise "#{name} has multiple installed versions" if dirs.length > 1
Keg.new dirs.first
end
raise KegUnspecifiedError if @kegs.empty?
@kegs
end
# self documenting perhaps?
def include? arg
@n=index arg
end
def next
at @n+1 or raise UsageError
end
def force?
flag? '--force'
end
def verbose?
flag? '--verbose' or ENV['HOMEBREW_VERBOSE']
end
def debug?
flag? '--debug' or ENV['HOMEBREW_DEBUG']
end
def quieter?
flag? '--quieter'
end
def interactive?
flag? '--interactive'
end
def flag? flag
options.each do |arg|
return true if arg == flag
next if arg[1..1] == '-'
return true if arg.include? flag[2..2]
end
return false
end
def usage; <<-EOS.undent
Usage: brew command [formula] ...
Usage: brew [--prefix] [--cache] [--version|-v]
Usage: brew [--verbose|-v]
Principle Commands:
install formula ... [--ignore-dependencies] [--HEAD|-H]
list [--unbrewed] [formula] ...
search [/regex/] [substring]
uninstall formula ...
update
Other Commands:
cleanup [formula]
home formula ...
info [formula] [--github]
link formula ...
outdated
prune
unlink formula ...
Commands useful when contributing:
create URL
edit [formula]
log formula
install formula [--debug|-d] [--interactive|-i] [--verbose|-v]
To visit the Homebrew homepage type:
brew home
EOS
end
private
def downcased_unique_named
@downcased_unique_named ||= named.collect{|arg| arg.downcase}.uniq
end
end
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