参考那篇回答,我试图使用OptionParser
解析rake
参数。我从中简化了示例,并不得不添加两个ARGV.shift
才能使其正常工作。
require 'optparse'
namespace :user do |args|
# Fix I hate to have here
puts "ARGV: #{ARGV}"
ARGV.shift
ARGV.shift
puts "ARGV: #{ARGV}"
desc 'Creates user account with given credentials: rake user:create'
# environment is required to have access to Rails models
task :create => :environment do
options = {}
OptionParser.new(args) do |opts|
opts.banner = "Usage: rake user:create [options]"
opts.on("-u", "--user {username}","Username") { |user| options[:user] = user }
end.parse!
puts "user: #{options[:user]}"
exit 0
end
end
以下是输出结果:
$ rake user:create -- -u foo
ARGV: ["user:create", "--", "-u", "foo"]
ARGV: ["-u", "foo"]
user: foo
我认为ARGV.shift
不是正确的方法。我想知道为什么没有它就无法正常工作,以及如何以正确的方式修复它。
exit(0)
,并且在使用rake user:create -- -u foo
时,rake
不会抛出“Don't know how to build task 'foo'”?如果您不想让rake
在那里停止怎么办?OptionParser#parse
不允许使用-u = foo
... - rellampec