Class: SystemUniversal

Inherits:
Object show all
Defined in:
lib/vendor/systemu/lib/systemu.rb,
lib/vendor/systemu/lib/systemu.rb

Defined Under Namespace

Classes: StreamReader

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(argv, opts = {}, &block) ⇒ SystemUniversal

instance methods



49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
 
# File 'lib/vendor/systemu/lib/systemu.rb', line 49

def initialize argv, opts = {}, &block
  getopt = getopts opts

  @argv = argv
  @block = block

  @stdin = getopt[ ['stdin', 'in', '0', 0] ]
  @stdout = getopt[ ['stdout', 'out', '1', 1] ]
  @stderr = getopt[ ['stderr', 'err', '2', 2] ]
  @env = getopt[ 'env' ]
  @cwd = getopt[ 'cwd' ]

  @host = getopt[ 'host', self.class.host ]
  @ppid = getopt[ 'ppid', self.class.ppid ]
  @pid = getopt[ 'pid', self.class.pid ]
  @ruby = getopt[ 'ruby', self.class.ruby ]
end

Class Method Details

.quote(*words) ⇒ Object 



40
41
42
 
# File 'lib/vendor/systemu/lib/systemu.rb', line 40

def quote(*words)
  words.map{|word| word.inspect}.join(' ')
end

.version ⇒ Object 



18
 
# File 'lib/vendor/systemu/lib/systemu.rb', line 18

def SystemUniversal.version() SystemUniversal::VERSION end

Instance Method Details

#child_program(config) ⇒ Object 



173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
 
# File 'lib/vendor/systemu/lib/systemu.rb', line 173

def child_program config
  <<-program
    # encoding: utf-8

    PIPE = STDOUT.dup
    begin
      config = Marshal.load(IO.read('#{ config }'))

      argv = config['argv']
      env = config['env']
      cwd = config['cwd']
      stdin = config['stdin']
      stdout = config['stdout']
      stderr = config['stderr']

      Dir.chdir cwd if cwd
      env.each{|k,v| ENV[k.to_s] = v.to_s} if env

      STDIN.reopen stdin
      STDOUT.reopen stdout
      STDERR.reopen stderr

      PIPE.puts "pid: \#{ Process.pid }"
      PIPE.flush                        ### the process is ready yo!
      PIPE.close
      if RUBY_VERSION >= "1.9"
        exec *argv
      else
        exec argv
      end
    rescue Exception => e
      PIPE.write Marshal.dump(e) rescue nil
      exit 42
    end
  program
end

#child_setup(tmp) ⇒ Object 



135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
 
# File 'lib/vendor/systemu/lib/systemu.rb', line 135

def child_setup tmp
  stdin = File.expand_path(File.join(tmp, 'stdin'))
  stdout = File.expand_path(File.join(tmp, 'stdout'))
  stderr = File.expand_path(File.join(tmp, 'stderr'))
  program = File.expand_path(File.join(tmp, 'program'))
  config = File.expand_path(File.join(tmp, 'config'))

  if @stdin
    open(stdin, 'w'){|f| relay @stdin => f}
  else
    FileUtils.touch stdin
  end
  FileUtils.touch stdout
  FileUtils.touch stderr

  c = {}
  c['argv'] = @argv
  c['env'] = @env
  c['cwd'] = @cwd
  c['stdin'] = stdin
  c['stdout'] = stdout
  c['stderr'] = stderr
  c['program'] = program
  open(config, 'w'){|f| Marshal.dump(c, f)}

  open(program, 'w'){|f| f.write child_program(config)}

  c
end

#getopts(opts = {}) ⇒ Object 



250
251
252
253
254
255
256
257
258
259
260
261
262
 
# File 'lib/vendor/systemu/lib/systemu.rb', line 250

def getopts opts = {}
  lambda do |*args|
    keys, default, ignored = args
    catch(:opt) do
      [keys].flatten.each do |key|
        [key, key.to_s, key.to_s.intern].each do |key|
          throw :opt, opts[key] if opts.has_key?(key)
        end
      end
      default
    end
  end
end

#new_thread(cid, block) ⇒ Object 



124
125
126
127
128
129
130
131
132
133
 
# File 'lib/vendor/systemu/lib/systemu.rb', line 124

def new_thread cid, block
  q = Queue.new
  Thread.new(cid) do |cid|
    current = Thread.current
    current.abort_on_exception = true
    q.push current
    block.call cid
  end
  q.pop
end

#quietly ⇒ Object 



165
166
167
168
169
170
171
 
# File 'lib/vendor/systemu/lib/systemu.rb', line 165

def quietly
  v = $VERBOSE
  $VERBOSE = nil
  yield
ensure
  $VERBOSE = v
end

#quote(*args, &block) ⇒ Object 



120
121
122
 
# File 'lib/vendor/systemu/lib/systemu.rb', line 120

def quote *args, &block
  SystemUniversal.quote(*args, &block)
end

#relay(srcdst) ⇒ Object 



210
211
212
213
214
215
216
217
218
219
220
221
 
# File 'lib/vendor/systemu/lib/systemu.rb', line 210

def relay srcdst
  src, dst, ignored = srcdst.to_a.first
  if src.respond_to? 'read'
    while((buf = src.read(8192))); dst << buf; end
  else
    if src.respond_to?(:each_line)
      src.each_line{|buf| dst << buf}
    else
      src.each{|buf| dst << buf}
    end
  end
end

#systemu ⇒ Object 



67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
 
# File 'lib/vendor/systemu/lib/systemu.rb', line 67

def systemu
  tmpdir do |tmp|
    c = child_setup tmp
    status = nil

    begin
      thread = nil

      quietly{
        IO.popen "#{ quote(@ruby) } #{ quote(c['program']) }", 'r+' do |pipe|
          line = pipe.gets
          case line
            when %r/^pid: \d+$/
              cid = Integer line[%r/\d+/]
            else
              begin
                buf = pipe.read
                buf = "#{ line }#{ buf }"
                e = Marshal.load buf
                raise unless Exception === e
                raise e
              rescue
                raise "wtf?\n#{ buf }\n"
              end
          end
          thread = new_thread cid, @block if @block
          pipe.read rescue nil
        end
      }
      status = $?
    ensure
      if thread
        begin
          class << status
            attr 'thread'
          end
          status.instance_eval{ @thread = thread }
        rescue
          42
        end
      end
    end

    if @stdout or @stderr
      open(c['stdout']){|f| relay f => @stdout} if @stdout
      open(c['stderr']){|f| relay f => @stderr} if @stderr
      status
    else
      [status, IO.read(c['stdout']), IO.read(c['stderr'])]
    end
  end
end

#tmpdir(d = Dir.tmpdir, max = 42, &b) ⇒ Object 



223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
 
# File 'lib/vendor/systemu/lib/systemu.rb', line 223

def tmpdir d = Dir.tmpdir, max = 42, &b
  i = -1 and loop{
    i += 1

    tmp = File.join d, "systemu_#{ @host }_#{ @ppid }_#{ @pid }_#{ rand }_#{ i += 1 }"

    begin
      Dir.mkdir tmp
    rescue Errno::EEXIST
      raise if i >= max
      next
    end

    break(
      if b
        begin
          b.call tmp
        ensure
          FileUtils.rm_rf tmp unless SystemU.turd
        end
      else
        tmp
      end
    )
  }
end

#version ⇒ Object 



19
 
# File 'lib/vendor/systemu/lib/systemu.rb', line 19

def version() SystemUniversal::VERSION end