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class UsageError <RuntimeError; end
class FormulaUnspecifiedError <UsageError; end
class KegUnspecifiedError <UsageError; end
class MultipleVersionsInstalledError <RuntimeError
attr :name
def initialize name
@name = name
super "#{name} has multiple installed versions"
end
end
class NoSuchKegError <RuntimeError
attr :name
def initialize name
@name = name
super "No such keg: #{HOMEBREW_CELLAR}/#{name}"
end
end
module HomebrewArgvExtension
def named
@named ||= reject{|arg| arg[0..0] == '-'}
end
def options_only
select {|arg| arg[0..0] == '-'}
end
def formulae
require 'formula'
@formulae ||= downcased_unique_named.map{ |name| Formula.factory(Formula.resolve_alias(name)) }
raise FormulaUnspecifiedError if @formulae.empty?
@formulae
end
def kegs
require 'keg'
require 'formula'
@kegs ||= downcased_unique_named.collect do |name|
d = HOMEBREW_CELLAR + Formula.resolve_alias(name)
dirs = d.children.select{ |pn| pn.directory? } rescue []
raise NoSuchKegError.new(name) if not d.directory? or dirs.length == 0
raise MultipleVersionsInstalledError.new(name) 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 build_head?
flag? '--HEAD'
end
def flag? flag
options_only.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 [-v|--version] [--prefix [formula]] [--cache [formula]]
[--cellar [formula]] [--config] [--env] [--repository]
[-h|--help] COMMAND [formula] ...
Principle Commands:
install formula ... [--ignore-dependencies] [--HEAD]
list [--unbrewed|--versions] [formula] ...
search [/regex/] [substring]
uninstall formula ...
update
Other Commands:
info formula [--github]
options formula
deps formula
uses formula [--installed]
home formula ...
cleanup [formula]
link formula ...
unlink formula ...
outdated
missing
prune
doctor
Informational:
--version
--config
--prefix [formula]
--cache [formula]
Commands useful when contributing:
create URL
edit [formula]
audit [formula]
log formula
install formula [-vd|-i]
For more information:
man brew
To visit the Homebrew homepage type:
brew home
EOS
end
private
def downcased_unique_named
# Only lowercase names, not paths or URLs
@downcased_unique_named ||= named.map do |arg|
arg.include?("/") ? arg : arg.downcase
end.uniq
end
end
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