Class: Reposh::Commands

Inherits:
Object
  • Object
show all
Defined in:
lib/reposh.rb

Instance Method Summary collapse

Constructor Details

#initialize(binpath, default_cmd, pathext) ⇒ Commands

Returns a new instance of Commands.



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# File 'lib/reposh.rb', line 119

def initialize(binpath, default_cmd, pathext)
  @binpath, @default_cmd, @pathext = binpath, default_cmd, pathext
  @commands = []
  register_builtin_commands
end

Instance Method Details

#add_ext(cmd, ext) ⇒ Object 



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# File 'lib/reposh.rb', line 222

def add_ext(cmd, ext)
  exe, *args = cmd.split(' ')
  "#{exe}#{ext} #{args.join ' '}"
end

#dispatch(cmd, sys) ⇒ Object 



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# File 'lib/reposh.rb', line 188

def dispatch(cmd, sys)
  @commands.each do |pattern, systems, task|
    next if systems && !systems.include?(sys)

    if (match = match?(pattern, cmd))
      return task.call(match)
    end
  end
  raise "must not happen"
end

#execute(cmd) ⇒ Object 



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# File 'lib/reposh.rb', line 210

def execute(cmd)
  stat = false
  ([""] + @pathext).each do |ext|
    command = add_ext(cmd, ext)
    puts command if @trace_mode
    result = system(command)
    return if result
    stat = $?
  end
  puts "reposh: failed to exec '#{cmd}': status #{stat.exitstatus}"
end

#match?(pat, value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/reposh.rb', line 199

def match?(pat, value)
  case pat
  when Regexp
    pat.match(value)
  when nil
    value == nil
  else
    pat.strip == value
  end
end

#register(pattern, systems = nil, &task) ⇒ Object 



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# File 'lib/reposh.rb', line 184

def register(pattern, systems = nil, &task)
  @commands.unshift [pattern, systems, task]
end

#register_builtin_commands ⇒ Object 



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# File 'lib/reposh.rb', line 125

def register_builtin_commands
  # default command
  register(/.*/){|match|
    cmd = (match[0] == "") ? @default_cmd : match[0]
    execute "#{@binpath} #{cmd}"
  }

  # system commands
  register("%reload"){ 
    load __FILE__ 
  }
  register("%env"){
    require 'pp'
    pp ENV
  }
  register("%version"){
    puts VERSION 
  }
  register(/\A%ruby (.*)/){|match|
    puts "reposh: result is " + eval(match[1]).inspect
  }
  @trace_mode = false
  register("%trace"){
    @trace_mode = (not @trace_mode)
    puts "set trace_mode to #{@trace_mode}"
  }

  # exit commands
  exit_task = lambda{
    puts ""
    exit
  }
  register(nil,    &exit_task)
  register("exit", &exit_task)
  register("quit", &exit_task)

  # shell execution command
  register(/^:(.*)/){|match|
    execute match[1]
  }
end

#register_custom_commands(commands) ⇒ Object 



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# File 'lib/reposh.rb', line 167

def register_custom_commands(commands)
  commands.each do |hash|
    if hash["for"] 
      systems = hash["for"].split(/,/).map{|s| s.strip}
    else
      systems = nil
    end
    register(Regexp.new(hash["pattern"]), systems){|match|
      cmd = hash["rule"].
              gsub(/\{system\}/, @binpath).
              gsub(/\{\$(\d+)\}/){ match[$1.to_i] }
      puts cmd
      execute cmd
    }
  end
end