1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
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
164
165
166
167
168
169
170
171
172
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
209
210
211
212
213
214
215
216
217
218
219
|
/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala
package sys
package process
import processInternal._
import Process._
import java.io.{ FileInputStream, FileOutputStream }
import BasicIO.{ Uncloseable, Streamed }
import Uncloseable.protect
private[process] trait ProcessBuilderImpl {
self: ProcessBuilder.type =>
private[process] class DaemonBuilder(underlying: ProcessBuilder) extends AbstractBuilder {
final def run(io: ProcessIO): Process = underlying.run(io.daemonized())
}
private[process] class Dummy(override val toString: String, exitValue: => Int) extends AbstractBuilder {
override def run(io: ProcessIO): Process = new DummyProcess(exitValue)
override def canPipeTo = true
}
private[process] class URLInput(url: URL) extends IStreamBuilder(url.openStream, url.toString)
private[process] class FileInput(file: File) extends IStreamBuilder(new FileInputStream(file), file.getAbsolutePath)
private[process] class FileOutput(file: File, append: Boolean) extends OStreamBuilder(new FileOutputStream(file, append), file.getAbsolutePath)
private[process] class OStreamBuilder(
stream: => OutputStream,
label: String
) extends ThreadBuilder(label, _ writeInput protect(stream)) {
override def hasExitValue = false
}
private[process] class IStreamBuilder(
stream: => InputStream,
label: String
) extends ThreadBuilder(label, _ processOutput protect(stream)) {
override def hasExitValue = false
}
private[process] abstract class ThreadBuilder(
override val toString: String,
runImpl: ProcessIO => Unit
) extends AbstractBuilder {
override def run(io: ProcessIO): Process = {
val success = new SyncVar[Boolean]
def go(): Unit = {
var ok = false
try {
runImpl(io)
ok = true
} finally success.put(ok)
}
val t = Spawn(go(), io.daemonizeThreads)
new ThreadProcess(t, success)
}
}
/** Represents a simple command without any redirection or combination. */
private[process] class Simple(p: JProcessBuilder) extends AbstractBuilder {
override def run(io: ProcessIO): Process = {
val process = p.start() // start the external process
import io._
// spawn threads that process the input, output, and error streams using the functions defined in `io`
val inThread = Spawn(writeInput(process.getOutputStream), daemon = true)
val outThread = Spawn(processOutput(process.getInputStream), daemonizeThreads)
val errorThread =
if (p.redirectErrorStream) Nil
else List(Spawn(processError(process.getErrorStream), daemonizeThreads))
new SimpleProcess(process, inThread, outThread :: errorThread)
}
override def toString = p.command.toString
override def canPipeTo = true
}
private[scala] abstract class AbstractBuilder extends ProcessBuilder with Sink with Source {
protected def toSource = this
protected def toSink = this
def #|(other: ProcessBuilder): ProcessBuilder = {
require(other.canPipeTo, "Piping to multiple processes is not supported.")
new PipedBuilder(this, other, false)
}
def #||(other: ProcessBuilder): ProcessBuilder = new OrBuilder(this, other)
def #&&(other: ProcessBuilder): ProcessBuilder = new AndBuilder(this, other)
def ###(other: ProcessBuilder): ProcessBuilder = new SequenceBuilder(this, other)
def run(): Process = run(connectInput = false)
def run(connectInput: Boolean): Process = run(BasicIO.standard(connectInput))
def run(log: ProcessLogger): Process = run(log, connectInput = false)
def run(log: ProcessLogger, connectInput: Boolean): Process = run(BasicIO(connectInput, log))
def !! = slurp(None, withIn = false)
def !!(log: ProcessLogger) = slurp(Some(log), withIn = false)
def !!< = slurp(None, withIn = true)
def !!<(log: ProcessLogger) = slurp(Some(log), withIn = true)
def lineStream: Stream[String] = lineStream(withInput = false, nonZeroException = true, None)
def lineStream(log: ProcessLogger): Stream[String] = lineStream(withInput = false, nonZeroException = true, Some(log))
def lineStream_! : Stream[String] = lineStream(withInput = false, nonZeroException = false, None)
def lineStream_!(log: ProcessLogger): Stream[String] = lineStream(withInput = false, nonZeroException = false, Some(log))
def ! = run(connectInput = false).exitValue()
def !(io: ProcessIO) = run(io).exitValue()
def !(log: ProcessLogger) = runBuffered(log, connectInput = false)
def !< = run(connectInput = true).exitValue()
def !<(log: ProcessLogger) = runBuffered(log, connectInput = true)
/** Constructs a new builder which runs this command with all input/output threads marked
* as daemon threads. This allows the creation of a long running process while still
* allowing the JVM to exit normally.
*
* Note: not in the public API because it's not fully baked, but I need the capability
* for fsc.
*/
def daemonized(): ProcessBuilder = new DaemonBuilder(this)
private[this] def slurp(log: Option[ProcessLogger], withIn: Boolean): String = {
val buffer = new StringBuffer
val code = this ! BasicIO(withIn, buffer, log)
if (code == 0) buffer.toString
else scala.sys.error("Nonzero exit value: " + code)
}
private[this] def lineStream(
withInput: Boolean,
nonZeroException: Boolean,
log: Option[ProcessLogger]
): Stream[String] = {
val streamed = Streamed[String](nonZeroException)
val process = run(BasicIO(withInput, streamed.process, log))
Spawn(streamed done process.exitValue())
streamed.stream()
}
private[this] def runBuffered(log: ProcessLogger, connectInput: Boolean) =
log buffer run(log, connectInput).exitValue()
def canPipeTo = false
def hasExitValue = true
}
private[process] class URLImpl(url: URL) extends URLBuilder with Source {
protected def toSource = new URLInput(url)
}
private[process] class FileImpl(base: File) extends FileBuilder with Sink with Source {
protected def toSource = new FileInput(base)
protected def toSink = new FileOutput(base, false)
def #<<(f: File): ProcessBuilder = #<<(new FileInput(f))
def #<<(u: URL): ProcessBuilder = #<<(new URLInput(u))
def #<<(s: => InputStream): ProcessBuilder = #<<(new IStreamBuilder(s, "<input stream>"))
def #<<(b: ProcessBuilder): ProcessBuilder = new PipedBuilder(b, new FileOutput(base, true), false)
}
private[process] abstract class BasicBuilder extends AbstractBuilder {
protected[this] def checkNotThis(a: ProcessBuilder) = require(a != this, "Compound process '" + a + "' cannot contain itself.")
final def run(io: ProcessIO): Process = {
val p = createProcess(io)
p.start()
p
}
protected[this] def createProcess(io: ProcessIO): BasicProcess
}
private[process] abstract class SequentialBuilder(
a: ProcessBuilder,
b: ProcessBuilder,
operatorString: String
) extends BasicBuilder {
checkNotThis(a)
checkNotThis(b)
override def toString = " ( " + a + " " + operatorString + " " + b + " ) "
}
private[process] class PipedBuilder(
first: ProcessBuilder,
second: ProcessBuilder,
toError: Boolean
) extends SequentialBuilder(first, second, if (toError) "#|!" else "#|") {
override def createProcess(io: ProcessIO) = new PipedProcesses(first, second, io, toError)
}
private[process] class AndBuilder(
first: ProcessBuilder,
second: ProcessBuilder
) extends SequentialBuilder(first, second, "#&&") {
override def createProcess(io: ProcessIO) = new AndProcess(first, second, io)
}
private[process] class OrBuilder(
first: ProcessBuilder,
second: ProcessBuilder
) extends SequentialBuilder(first, second, "#||") {
override def createProcess(io: ProcessIO) = new OrProcess(first, second, io)
}
private[process] class SequenceBuilder(
first: ProcessBuilder,
second: ProcessBuilder
) extends SequentialBuilder(first, second, "###") {
override def createProcess(io: ProcessIO) = new ProcessSequence(first, second, io)
}
}
|
