author | wenzelm |
Sun, 26 Sep 2010 22:54:37 +0200 | |
changeset 39705 | 41e9f69c553d |
parent 39582 | a873158542d0 |
child 39706 | 6e74fb2d4374 |
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.util.zip.GZIPInputStream |
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import java.net.URL |
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import java.io.{BufferedWriter, OutputStreamWriter, FileOutputStream, BufferedOutputStream, |
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BufferedInputStream, InputStream, 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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/* UTF-8 charset */ |
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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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def string_bytes(s: String): Array[Byte] = s.getBytes(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 slurp(reader: BufferedReader): String = |
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{ |
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val output = new StringBuilder(100) |
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var c = -1 |
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while ({ c = reader.read; c != -1 }) output += c.toChar |
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reader.close |
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output.toString |
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} |
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def slurp(stream: InputStream): String = |
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slurp(new BufferedReader(new InputStreamReader(stream, charset))) |
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def read_file(file: File): String = slurp(new FileInputStream(file)) |
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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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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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file.deleteOnExit |
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try { body(file) } finally { file.delete } |
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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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/* 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) |
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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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proc.start |
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} |
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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 = slurp(proc.getInputStream) |
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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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|
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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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|
160 |
||
161 |
/* unpack tar.gz */ |
|
162 |
||
163 |
def raw_untar(url: URL, root: File, |
|
164 |
tar: String = "tar", progress: Int => Unit = _ => ()): String = |
|
165 |
{ |
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166 |
if (!root.isDirectory && !root.mkdirs) error("Failed to create root directory: " + root) |
|
167 |
||
168 |
val connection = url.openConnection |
|
169 |
||
170 |
val length = connection.getContentLength.toLong |
|
171 |
require(length >= 0L) |
|
172 |
||
173 |
val buffered_stream = new BufferedInputStream(connection.getInputStream) |
|
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val progress_stream = new InputStream { |
|
175 |
private val total = length max 1L |
|
176 |
private var index = 0L |
|
177 |
private var percentage = 0L |
|
178 |
override def read(): Int = |
|
179 |
{ |
|
180 |
val c = buffered_stream.read |
|
181 |
if (c != -1) { |
|
182 |
index += 100 |
|
183 |
val p = index / total |
|
184 |
if (percentage != p) { percentage = p; progress(percentage.toInt) } |
|
185 |
} |
|
186 |
c |
|
187 |
} |
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override def close() { buffered_stream.close } |
|
189 |
} |
|
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val gzip_stream = new GZIPInputStream(progress_stream) |
|
191 |
||
192 |
val proc = raw_execute(null, null, false, tar, "-C", root.getCanonicalPath, "-x", "-f", "-") |
|
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val stdout = Simple_Thread.future("tar_stdout") { slurp(proc.getInputStream) } |
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194 |
val stderr = Simple_Thread.future("tar_stderr") { slurp(proc.getErrorStream) } |
|
195 |
val stdin = new BufferedOutputStream(proc.getOutputStream) |
|
196 |
||
197 |
try { |
|
198 |
var c = -1 |
|
199 |
while ({ c = gzip_stream.read; c != -1 }) stdin.write(c) |
|
200 |
stdin.close |
|
201 |
||
202 |
val rc = try { proc.waitFor } finally { Thread.interrupted } |
|
203 |
if (rc != 0) error(stderr.join.trim) else stdout.join |
|
204 |
} |
|
205 |
finally { |
|
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gzip_stream.close |
|
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stdin.close |
|
208 |
proc.destroy |
|
209 |
} |
|
210 |
} |
|
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} |
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212 |
|
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213 |
|
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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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218 |
|
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219 |
|
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/* jvm_path */ |
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221 |
|
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private val Cygdrive = new Regex("/cygdrive/([a-zA-Z])($|/.*)") |
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223 |
private val Named_Root = new Regex("//+([^/]*)(.*)") |
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224 |
|
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def jvm_path(posix_path: String): String = |
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226 |
if (Platform.is_windows) { |
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val result_path = new StringBuilder |
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228 |
val rest = |
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229 |
posix_path match { |
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230 |
case Cygdrive(drive, rest) => |
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231 |
result_path ++= (drive + ":" + File.separator) |
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|
232 |
rest |
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|
233 |
case Named_Root(root, rest) => |
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|
234 |
result_path ++= File.separator |
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changeset
|
235 |
result_path ++= File.separator |
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changeset
|
236 |
result_path ++= root |
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|
237 |
rest |
34201
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|
238 |
case path if path.startsWith("/") => |
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|
239 |
result_path ++= platform_root |
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|
240 |
path |
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changeset
|
241 |
case path => path |
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|
242 |
} |
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changeset
|
243 |
for (p <- rest.split("/") if p != "") { |
c95dcd12f48a
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|
244 |
val len = result_path.length |
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|
245 |
if (len > 0 && result_path(len - 1) != File.separatorChar) |
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|
246 |
result_path += File.separatorChar |
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|
247 |
result_path ++= p |
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changeset
|
248 |
} |
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|
249 |
result_path.toString |
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|
250 |
} |
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|
251 |
else posix_path |
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|
252 |
|
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|
253 |
|
c95dcd12f48a
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|
254 |
/* posix_path */ |
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|
255 |
|
c95dcd12f48a
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diff
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|
256 |
private val Platform_Root = new Regex("(?i)" + |
c95dcd12f48a
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parents:
diff
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|
257 |
Pattern.quote(platform_root) + """(?:\\+|\z)(.*)""") |
c95dcd12f48a
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parents:
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changeset
|
258 |
|
c95dcd12f48a
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parents:
diff
changeset
|
259 |
private val Drive = new Regex("""([a-zA-Z]):\\*(.*)""") |
c95dcd12f48a
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changeset
|
260 |
|
c95dcd12f48a
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wenzelm
parents:
diff
changeset
|
261 |
def posix_path(jvm_path: String): String = |
c95dcd12f48a
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wenzelm
parents:
diff
changeset
|
262 |
if (Platform.is_windows) { |
c95dcd12f48a
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wenzelm
parents:
diff
changeset
|
263 |
jvm_path.replace('/', '\\') match { |
c95dcd12f48a
separate Standard_System (Cygwin/Posix compatibility) vs. Isabelle_System (settings environment etc.);
wenzelm
parents:
diff
changeset
|
264 |
case Platform_Root(rest) => "/" + rest.replace('\\', '/') |
c95dcd12f48a
separate Standard_System (Cygwin/Posix compatibility) vs. Isabelle_System (settings environment etc.);
wenzelm
parents:
diff
changeset
|
265 |
case Drive(letter, rest) => |
c95dcd12f48a
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parents:
diff
changeset
|
266 |
"/cygdrive/" + letter.toLowerCase(Locale.ENGLISH) + |
c95dcd12f48a
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parents:
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changeset
|
267 |
(if (rest == "") "" else "/" + rest.replace('\\', '/')) |
c95dcd12f48a
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parents:
diff
changeset
|
268 |
case path => path.replace('\\', '/') |
c95dcd12f48a
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parents:
diff
changeset
|
269 |
} |
c95dcd12f48a
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parents:
diff
changeset
|
270 |
} |
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changeset
|
271 |
else jvm_path |
36193
067a01827fca
improved ISABELLE_JAVA, based on THIS_JAVA of the actually running JVM;
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changeset
|
272 |
|
067a01827fca
improved ISABELLE_JAVA, based on THIS_JAVA of the actually running JVM;
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changeset
|
273 |
|
067a01827fca
improved ISABELLE_JAVA, based on THIS_JAVA of the actually running JVM;
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|
274 |
/* this_java executable */ |
067a01827fca
improved ISABELLE_JAVA, based on THIS_JAVA of the actually running JVM;
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36136
diff
changeset
|
275 |
|
067a01827fca
improved ISABELLE_JAVA, based on THIS_JAVA of the actually running JVM;
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|
276 |
def this_java(): String = |
067a01827fca
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changeset
|
277 |
{ |
067a01827fca
improved ISABELLE_JAVA, based on THIS_JAVA of the actually running JVM;
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36136
diff
changeset
|
278 |
val java_home = System.getProperty("java.home") |
067a01827fca
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36136
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changeset
|
279 |
val java_exe = |
067a01827fca
improved ISABELLE_JAVA, based on THIS_JAVA of the actually running JVM;
wenzelm
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36136
diff
changeset
|
280 |
if (Platform.is_windows) new File(java_home + "\\bin\\java.exe") |
067a01827fca
improved ISABELLE_JAVA, based on THIS_JAVA of the actually running JVM;
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36136
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|
281 |
else new File(java_home + "/bin/java") |
067a01827fca
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36136
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changeset
|
282 |
if (!java_exe.isFile) error("Expected this Java executable: " + java_exe.toString) |
067a01827fca
improved ISABELLE_JAVA, based on THIS_JAVA of the actually running JVM;
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36136
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changeset
|
283 |
posix_path(java_exe.getAbsolutePath) |
067a01827fca
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36136
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changeset
|
284 |
} |
34201
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|
285 |
} |