Question

我先说两件事。

1）我已经在Stack Overflow和Google上搜索了这个答案 2）今天是我曾经试图弄乱Ruby的第一天。

好冷。所以我正在尝试构建一个Ruby脚本，我可以使用Homebrew通过一个命令来安装MySQL，PHP，Redis和xdebug。此命令类似于：

./phpserver.rb --with-php --with-mysql --with-xdebug --with-redis

然而，我收到了＃34;缺少论据：--with-redis＆＃34;当我运行以上。如果我通过＆＃34; - with-redis = 1.0＆＃34;强制使用Redis版本，则此错误消失。或者如果我不包括该选项。

这些选项都不是强制性的（是的，我知道脚本还没有处理零选项）。

我完全难倒了，如果有一个明显的答案，你想把我链接到那就好了。我为我缺乏Ruby知识而道歉，这是一个帮助我首先进入Ruby的副项目。

这是我的剧本：

#!/usr/bin/ruby
prefix = `brew --prefix`.gsub("\n", "");
$LOAD_PATH << prefix+"/Library/Homebrew/"

# Required scripts
require 'optparse'
require 'global'

# Handle Ctrl+C
trap('INT') {
  opoo "Installation failed. Please try again!"
  exit!
}

# Start big try statement
begin

# Options
options = {}
OptionParser.new do |opts|
  banner = "\nUsage: phpserver.rb [options]\n\n"

  opts.banner = banner
  opts.on("--with-mysql=VERSION", "Install MySQL with VERSION",
          "Run `brew versions mysql` to see available versions.") do |v|
    options[:mysql] = v
  end
  opts.on("--with-php", "Install PHP") do |v|
    options[:php] = v
  end
  opts.on("--with-xdebug", "Install xdebug for PHP debugging") do |v|
    options[:xdebug] = v
  end
  opts.on("--with-redis=VERSION", "Install Redis with VERSION",
          "Run `brew versions redis` to see available versions.") do |v|
    options[:redis] = v
  end
  opts.on_tail("-h", "--help", "Show this message") do
    puts opts
    puts "\n"
    exit
  end
end.parse!

# Need to run brew update first?
ohai "Making sure Homebrew is up to do."
versions = `brew versions --compact a2ps`
if versions.include? "Please `brew install git` first"
  ohai "Need to install Git before the script can run; we'll do that for you."
  system 'brew install git'

  ohai "Now we need to pull down the Homebrew repository, we'll do that for you as well."
  system 'brew update'
elsif versions.include? "Please `brew update"
  ohai "Homebrew needs to be updated, we'll take care of that."
  system 'brew update'
end

# Tap them kegs!
if !File.directory?("#{prefix}/Library/Taps/josegonzalez-php")
  ohai "Tapping josegonzalez/homebrew-php"
  if system 'brew tap josegonzalez/homebrew-php'
    oh1 "Success!"
  else
    opoo "Failed to tap the keg. Please report this."
  end
else
  oh1 "The josegonzalez/homebrew-php keg has already been tapped. Continuing..."
end

# Installing MySQL?
if options[:mysql] != nil
  ohai "Installing MySQL."

  revert = false
  command = false
  if options[:mysql] != true
    versions = `brew versions mysql`

    errors = []
    versions.each do |version|
      if version.start_with? options[:mysql]
        revert = true
        command = version.gsub(options[:mysql], "").gsub(prefix+"/", "").strip!
        break
      else
        errors << "- "+version
      end
    end

    if command == false
      error = "Invalid MySQL version. The available versions for MySQL are:\n\n"
      error += errors.join()
      opoo error
    else
      %x(cd #{prefix} && #{command})
    end
  end

  system 'brew install mysql'

  if revert
    command = command.split(" ").last
    %x(cd #{prefix} && #{command})
  end
end

# Installing PHP?
if options[:php] != nil
  ohai "Installing PHP."

  install = 'brew install php';
  if options[:mysql] != nil
    install += ' --with-mysql';
  end
  if options[:php] == true or options[:php].to_f < 5.4
    install += ' --with-suhosin';
  end

  system install
end

# Installing xdebug?
if options[:xdebug] != nil
  ohai "Installing xdebug."
  system 'brew install xdebug-php'
end

# Installing Redis?
if options[:redis] != nil
  ohai "Installing Redis."
  system 'brew install redis'
end

rescue OptionParser::NeedlessArgument
  opoo "Invalid arguments. Run `./phpserver.php -h` for help."
rescue StandardError => message
  if !["exit"].include? message
    opoo message
  end
end

Answer 1

您应该收到有关--with-mysql缺少参数的投诉。来自fine manual：

长款开关：

指定长样式开关，它采用强制，可选或无参数。它是以下形式的字符串：
"--switch=MANDATORY" or "--switch MANDATORY"
"--switch[=OPTIONAL]"
"--switch"

所以你想使用--with-mysql[=VERSION]和类似的东西：

opts.on("--with-mysql[=VERSION]", "Install MySQL with VERSION",
        "Run `brew versions mysql` to see available versions.") do |v|
  options[:mysql] = v
end
#...
opts.on("--with-redis[=VERSION]", "Install Redis with VERSION",
        "Run `brew versions redis` to see available versions.") do |v|
  options[:redis] = v
end

如果您说options[:redis] = nil，--with-redis会options[:redis] = '1.0'，如果您说--with-redis=1.0，则会{{1}}。

Ruby OptionParser抛出MissingArgument

1 个答案: