/* Title: Pure/System/isabelle_system.scala
Author: Makarius
Isabelle system support (settings environment etc.).
*/
package isabelle
import java.util.regex.Pattern
import java.util.Locale
import java.io.{BufferedWriter, OutputStreamWriter, FileOutputStream,
BufferedInputStream, FileInputStream, BufferedReader, InputStreamReader,
File, IOException}
import java.awt.{GraphicsEnvironment, Font}
import scala.io.Source
import scala.util.matching.Regex
import scala.collection.mutable
class Isabelle_System extends Standard_System
{
/** Isabelle environment **/
private val environment: Map[String, String] =
{
import scala.collection.JavaConversions._
val env0 = Map(java.lang.System.getenv.toList: _*) +
("THIS_JAVA" -> this_java())
val isabelle_home =
env0.get("ISABELLE_HOME") match {
case None | Some("") =>
val path = java.lang.System.getProperty("isabelle.home")
if (path == null || path == "") error("Unknown Isabelle home directory")
else path
case Some(path) => path
}
Standard_System.with_tmp_file("settings") { dump =>
val shell_prefix =
if (Platform.is_windows) List(platform_root + "\\bin\\bash", "-l") else Nil
val cmdline =
shell_prefix ::: List(isabelle_home + "/bin/isabelle", "getenv", "-d", dump.toString)
val (output, rc) = Standard_System.raw_exec(null, env0, true, cmdline: _*)
if (rc != 0) error(output)
val entries =
for (entry <- Source.fromFile(dump).mkString split "\0" if entry != "") yield {
val i = entry.indexOf('=')
if (i <= 0) (entry -> "")
else (entry.substring(0, i) -> entry.substring(i + 1))
}
Map(entries: _*) +
("HOME" -> java.lang.System.getenv("HOME")) +
("PATH" -> java.lang.System.getenv("PATH"))
}
}
/* external processes */
def execute(redirect: Boolean, args: String*): Process =
{
val cmdline =
if (Platform.is_windows) List(platform_root + "\\bin\\env.exe") ++ args
else args
Standard_System.raw_execute(null, environment, redirect, cmdline: _*)
}
/* getenv */
def getenv(name: String): String =
environment.getOrElse(if (name == "HOME") "HOME_JVM" else name, "")
def getenv_strict(name: String): String =
{
val value = getenv(name)
if (value != "") value else error("Undefined environment variable: " + name)
}
override def toString = getenv("ISABELLE_HOME")
/** file path specifications **/
/* expand_path */
private val Root = new Regex("(//+[^/]*|/)(.*)")
private val Only_Root = new Regex("//+[^/]*|/")
def expand_path(isabelle_path: String): String =
{
val result_path = new StringBuilder
def init(path: String): String =
{
path match {
case Root(root, rest) =>
result_path.clear
result_path ++= root
rest
case _ => path
}
}
def append(path: String)
{
val rest = init(path)
for (p <- rest.split("/") if p != "" && p != ".") {
if (p == "..") {
val result = result_path.toString
if (!Only_Root.pattern.matcher(result).matches) {
val i = result.lastIndexOf("/")
if (result == "")
result_path ++= ".."
else if (result.substring(i + 1) == "..")
result_path ++= "/.."
else if (i < 0)
result_path.length = 0
else
result_path.length = i
}
}
else {
val len = result_path.length
if (len > 0 && result_path(len - 1) != '/')
result_path += '/'
result_path ++= p
}
}
}
val rest = init(isabelle_path)
for (p <- rest.split("/")) {
if (p.startsWith("$")) append(getenv_strict(p.substring(1)))
else if (p == "~") append(getenv_strict("HOME"))
else if (p == "~~") append(getenv_strict("ISABELLE_HOME"))
else append(p)
}
result_path.toString
}
/* platform_path */
def platform_path(isabelle_path: String): String =
jvm_path(expand_path(isabelle_path))
def platform_file(path: String) = new File(platform_path(path))
/* source files */
private def try_file(file: File) = if (file.isFile) Some(file) else None
def source_file(path: String): Option[File] =
{
if (path.startsWith("/") || path == "")
try_file(platform_file(path))
else {
val pure_file = platform_file("$ISABELLE_HOME/src/Pure/" + path)
if (pure_file.isFile) Some(pure_file)
else if (getenv("ML_SOURCES") != "")
try_file(platform_file("$ML_SOURCES/" + path))
else None
}
}
/** system tools **/
def bash_output(script: String): (String, Int) =
{
Standard_System.with_tmp_file("isabelle_script") { script_file =>
Standard_System.with_tmp_file("isabelle_pid") { pid_file =>
Standard_System.with_tmp_file("isabelle_output") { output_file =>
Standard_System.write_file(script_file, script)
val proc = execute(true, expand_path("$ISABELLE_HOME/lib/scripts/bash"), "group",
script_file.getPath, pid_file.getPath, output_file.getPath)
def kill(strict: Boolean) =
{
val pid =
try { Some(Standard_System.read_file(pid_file)) }
catch { case _: IOException => None }
if (pid.isDefined) {
var running = true
var count = 10
while (running && count > 0) {
if (execute(true, "kill", "-INT", "-" + pid.get).waitFor != 0)
running = false
else {
Thread.sleep(100)
if (!strict) count -= 1
}
}
}
}
val shutdown_hook = new Thread { override def run = kill(true) }
Runtime.getRuntime.addShutdownHook(shutdown_hook) // FIXME tmp files during shutdown?!?
def cleanup() =
try { Runtime.getRuntime.removeShutdownHook(shutdown_hook) }
catch { case _: IllegalStateException => }
val rc =
try {
try { proc.waitFor } // FIXME read stderr (!??)
catch { case e: InterruptedException => Thread.interrupted; kill(false); throw e }
}
finally {
proc.getOutputStream.close
proc.getInputStream.close
proc.getErrorStream.close
proc.destroy
cleanup()
}
val output =
try { Standard_System.read_file(output_file) }
catch { case _: IOException => "" }
(output, rc)
}
}
}
}
def isabelle_tool(name: String, args: String*): (String, Int) =
{
getenv_strict("ISABELLE_TOOLS").split(":").find { dir =>
val file = platform_file(dir + "/" + name)
try { file.isFile && file.canRead && file.canExecute }
catch { case _: SecurityException => false }
} match {
case Some(dir) =>
Standard_System.process_output(
execute(true, (List(expand_path(dir + "/" + name)) ++ args): _*))
case None => ("Unknown Isabelle tool: " + name, 2)
}
}
/* named pipes */
def mk_fifo(): String =
{
val (result, rc) = isabelle_tool("mkfifo")
if (rc == 0) result.trim
else error(result)
}
def rm_fifo(fifo: String)
{
val (result, rc) = isabelle_tool("rmfifo", fifo)
if (rc != 0) error(result)
}
def fifo_stream(fifo: String): BufferedInputStream =
{
// blocks until writer is ready
val stream =
if (Platform.is_windows) {
val proc = execute(false, "cat", fifo)
proc.getOutputStream.close
proc.getErrorStream.close
proc.getInputStream
}
else new FileInputStream(fifo)
new BufferedInputStream(stream)
}
/** Isabelle resources **/
/* components */
def components(): List[String] =
getenv("ISABELLE_COMPONENTS").split(":").toList
/* find logics */
def find_logics(): List[String] =
{
val ml_ident = getenv_strict("ML_IDENTIFIER")
val logics = new mutable.ListBuffer[String]
for (dir <- getenv_strict("ISABELLE_PATH").split(":")) {
val files = platform_file(dir + "/" + ml_ident).listFiles()
if (files != null) {
for (file <- files if file.isFile) logics += file.getName
}
}
logics.toList.sortWith(_ < _)
}
/* symbols */
private def read_symbols(path: String): List[String] =
{
val file = platform_file(path)
if (file.isFile) Source.fromFile(file).getLines().toList
else Nil
}
val symbols = new Symbol.Interpretation(
read_symbols("$ISABELLE_HOME/etc/symbols") :::
read_symbols("$ISABELLE_HOME_USER/etc/symbols"))
/* fonts */
val font_family = "IsabelleText"
def get_font(bold: Boolean): Font =
new Font(font_family, if (bold) Font.BOLD else Font.PLAIN, 1)
def install_fonts()
{
def create_font(bold: Boolean): Font =
{
val name =
if (bold) "$ISABELLE_HOME/lib/fonts/IsabelleTextBold.ttf"
else "$ISABELLE_HOME/lib/fonts/IsabelleText.ttf"
Font.createFont(Font.TRUETYPE_FONT, platform_file(name))
}
def check_font() = get_font(false).getFamily == font_family
if (!check_font()) {
val font = create_font(false)
val bold_font = create_font(true)
val ge = GraphicsEnvironment.getLocalGraphicsEnvironment()
ge.registerFont(font)
// workaround strange problem with Apple's Java 1.6 font manager
if (bold_font.getFamily == font_family) ge.registerFont(bold_font)
if (!check_font()) error("Failed to install IsabelleText fonts")
}
}
}