author | wenzelm |
Mon, 19 Apr 2010 16:04:42 +0200 | |
changeset 36204 | 16c371c6ff86 |
parent 36193 | 067a01827fca |
child 38264 | 205b74a1bb18 |
permissions | -rw-r--r-- |
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/* Title: Pure/System/standard_system.scala |
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Author: Makarius |
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Standard system operations, with basic Cygwin/Posix compatibility. |
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*/ |
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package isabelle |
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import java.util.regex.Pattern |
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import java.util.Locale |
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import java.io.{BufferedWriter, OutputStreamWriter, FileOutputStream, |
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BufferedInputStream, FileInputStream, BufferedReader, InputStreamReader, |
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File, FileFilter, IOException} |
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adapted to Scala 2.8.0 Beta1 -- with notable changes to scala.collection;
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import scala.io.{Source, Codec} |
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import scala.util.matching.Regex |
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import scala.collection.mutable |
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object Standard_System |
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{ |
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val charset = "UTF-8" |
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def codec(): Codec = Codec(charset) |
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/* permissive UTF-8 decoding */ |
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// see also http://en.wikipedia.org/wiki/UTF-8#Description |
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// overlong encodings enable byte-stuffing |
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def decode_permissive_utf8(text: CharSequence): String = |
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{ |
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val buf = new java.lang.StringBuilder(text.length) |
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var code = -1 |
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var rest = 0 |
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def flush() |
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{ |
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if (code != -1) { |
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if (rest == 0 && Character.isValidCodePoint(code)) |
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buf.appendCodePoint(code) |
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else buf.append('\uFFFD') |
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code = -1 |
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rest = 0 |
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} |
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} |
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def init(x: Int, n: Int) |
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{ |
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flush() |
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code = x |
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rest = n |
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} |
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def push(x: Int) |
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{ |
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if (rest <= 0) init(x, -1) |
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else { |
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code <<= 6 |
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code += x |
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rest -= 1 |
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} |
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} |
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for (i <- 0 until text.length) { |
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val c = text.charAt(i) |
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if (c < 128) { flush(); buf.append(c) } |
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else if ((c & 0xC0) == 0x80) push(c & 0x3F) |
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else if ((c & 0xE0) == 0xC0) init(c & 0x1F, 1) |
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else if ((c & 0xF0) == 0xE0) init(c & 0x0F, 2) |
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else if ((c & 0xF8) == 0xF0) init(c & 0x07, 3) |
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} |
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flush() |
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buf.toString |
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} |
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/* basic file operations */ |
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def with_tmp_file[A](prefix: String)(body: File => A): A = |
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{ |
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val file = File.createTempFile(prefix, null) |
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try { body(file) } finally { file.delete } |
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} |
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def read_file(file: File): String = |
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{ |
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val buf = new StringBuilder(file.length.toInt) |
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val reader = new BufferedReader(new InputStreamReader(new FileInputStream(file), charset)) |
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var c = reader.read |
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while (c != -1) { |
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buf.append(c.toChar) |
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c = reader.read |
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} |
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reader.close |
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buf.toString |
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} |
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def write_file(file: File, text: CharSequence) |
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{ |
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val writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), charset)) |
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try { writer.append(text) } |
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finally { writer.close } |
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} |
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// FIXME handle (potentially cyclic) directory graph |
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def find_files(start: File, ok: File => Boolean): List[File] = |
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{ |
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val files = new mutable.ListBuffer[File] |
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val filter = new FileFilter { def accept(entry: File) = entry.isDirectory || ok(entry) } |
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def find_entry(entry: File) |
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{ |
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if (ok(entry)) files += entry |
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if (entry.isDirectory) entry.listFiles(filter).foreach(find_entry) |
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} |
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find_entry(start) |
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files.toList |
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} |
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||
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/* shell processes */ |
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def raw_execute(cwd: File, env: Map[String, String], redirect: Boolean, args: String*): Process = |
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{ |
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val cmdline = new java.util.LinkedList[String] |
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for (s <- args) cmdline.add(s) |
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val proc = new ProcessBuilder(cmdline) |
34219 | 125 |
if (cwd != null) proc.directory(cwd) |
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if (env != null) { |
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proc.environment.clear |
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for ((x, y) <- env) proc.environment.put(x, y) |
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} |
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proc.redirectErrorStream(redirect) |
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try { proc.start } |
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catch { case e: IOException => error(e.getMessage) } |
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} |
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135 |
|
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def process_output(proc: Process): (String, Int) = |
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{ |
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proc.getOutputStream.close |
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val output = Source.fromInputStream(proc.getInputStream)(codec()).mkString // FIXME |
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val rc = |
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try { proc.waitFor } |
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finally { |
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proc.getInputStream.close |
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proc.getErrorStream.close |
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proc.destroy |
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Thread.interrupted |
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} |
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(output, rc) |
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} |
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def raw_exec(cwd: File, env: Map[String, String], redirect: Boolean, args: String*): |
|
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(String, Int) = process_output(raw_execute(cwd, env, redirect, args: _*)) |
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} |
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154 |
|
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155 |
|
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class Standard_System |
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{ |
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val platform_root = if (Platform.is_windows) Cygwin.check_root() else "/" |
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override def toString = platform_root |
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160 |
|
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161 |
|
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/* jvm_path */ |
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163 |
|
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private val Cygdrive = new Regex("/cygdrive/([a-zA-Z])($|/.*)") |
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private val Named_Root = new Regex("//+([^/]*)(.*)") |
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166 |
|
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def jvm_path(posix_path: String): String = |
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if (Platform.is_windows) { |
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val result_path = new StringBuilder |
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val rest = |
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posix_path match { |
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case Cygdrive(drive, rest) => |
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result_path ++= (drive + ":" + File.separator) |
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174 |
rest |
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case Named_Root(root, rest) => |
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result_path ++= File.separator |
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result_path ++= File.separator |
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result_path ++= root |
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179 |
rest |
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case path if path.startsWith("/") => |
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result_path ++= platform_root |
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182 |
path |
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183 |
case path => path |
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184 |
} |
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185 |
for (p <- rest.split("/") if p != "") { |
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186 |
val len = result_path.length |
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if (len > 0 && result_path(len - 1) != File.separatorChar) |
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188 |
result_path += File.separatorChar |
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189 |
result_path ++= p |
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|
190 |
} |
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191 |
result_path.toString |
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192 |
} |
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193 |
else posix_path |
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|
194 |
|
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|
195 |
|
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196 |
/* posix_path */ |
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|
197 |
|
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|
198 |
private val Platform_Root = new Regex("(?i)" + |
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|
199 |
Pattern.quote(platform_root) + """(?:\\+|\z)(.*)""") |
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|
200 |
|
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201 |
private val Drive = new Regex("""([a-zA-Z]):\\*(.*)""") |
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|
202 |
|
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|
203 |
def posix_path(jvm_path: String): String = |
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|
204 |
if (Platform.is_windows) { |
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|
205 |
jvm_path.replace('/', '\\') match { |
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|
206 |
case Platform_Root(rest) => "/" + rest.replace('\\', '/') |
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|
207 |
case Drive(letter, rest) => |
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|
208 |
"/cygdrive/" + letter.toLowerCase(Locale.ENGLISH) + |
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|
209 |
(if (rest == "") "" else "/" + rest.replace('\\', '/')) |
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|
210 |
case path => path.replace('\\', '/') |
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|
211 |
} |
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|
212 |
} |
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|
213 |
else jvm_path |
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214 |
|
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|
215 |
|
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216 |
/* this_java executable */ |
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|
217 |
|
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218 |
def this_java(): String = |
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219 |
{ |
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220 |
val java_home = System.getProperty("java.home") |
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221 |
val java_exe = |
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222 |
if (Platform.is_windows) new File(java_home + "\\bin\\java.exe") |
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223 |
else new File(java_home + "/bin/java") |
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224 |
if (!java_exe.isFile) error("Expected this Java executable: " + java_exe.toString) |
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225 |
posix_path(java_exe.getAbsolutePath) |
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|
226 |
} |
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227 |
} |