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
|
/* NSC -- new Scala compiler
* Copyright 2006-2011 LAMP/EPFL
* @author Lex Spoon
*/
package scala.tools.nsc
import java.io.IOException
import java.net.URL
import scala.tools.util.PathResolver
import io.{ File }
import util.{ ClassPath, ScalaClassLoader }
import Properties.{ versionString, copyrightString }
import interpreter.{ ILoop }
/** An object that runs Scala code. It has three possible
* sources for the code to run: pre-compiled code, a script file,
* or interactive entry.
*/
object MainGenericRunner {
def errorFn(ex: Throwable): Boolean = {
ex.printStackTrace()
false
}
def errorFn(str: String): Boolean = {
Console println str
false
}
def main(args: Array[String]) {
if (!process(args))
sys.exit(1)
}
def process(args: Array[String]): Boolean = {
val command = new GenericRunnerCommand(args.toList, (x: String) => errorFn(x))
import command.settings
def sampleCompiler = new Global(settings) // def so its not created unless needed
if (!command.ok) return errorFn("\n" + command.shortUsageMsg)
else if (settings.version.value) return errorFn("Scala code runner %s -- %s".format(versionString, copyrightString))
else if (command.shouldStopWithInfo) return errorFn(command getInfoMessage sampleCompiler)
def isE = !settings.execute.isDefault
def dashe = settings.execute.value
def isI = !settings.loadfiles.isDefault
def dashi = settings.loadfiles.value
def combinedCode = {
val files = if (isI) dashi map (file => File(file).slurp()) else Nil
val str = if (isE) List(dashe) else Nil
files ++ str mkString "\n\n"
}
val classpath: List[URL] = new PathResolver(settings) asURLs
/** Was code given in a -e argument? */
if (isE) {
/** If a -i argument was also given, we want to execute the code after the
* files have been included, so they are read into strings and prepended to
* the code given in -e. The -i option is documented to only make sense
* interactively so this is a pretty reasonable assumption.
*
* This all needs a rewrite though.
*/
val fullArgs = command.thingToRun.toList ::: command.arguments
return ScriptRunner.runCommand(settings, combinedCode, fullArgs)
}
else command.thingToRun match {
case None =>
// We start the repl when no arguments are given.
new ILoop process settings
case Some(thingToRun) =>
val isObjectName =
settings.howtorun.value match {
case "object" => true
case "script" => false
case "guess" => ScalaClassLoader.classExists(classpath, thingToRun)
}
val result = try {
if (isObjectName) ObjectRunner.runAndCatch(classpath, thingToRun, command.arguments)
else ScriptRunner.runScriptAndCatch(settings, thingToRun, command.arguments)
}
catch { case ex => Left(ex) }
result match {
case Left(ex) => errorFn(ex)
case Right(b) => b
}
}
}
}
|
