/* Title: Pure/System/isabelle_system.scala
Author: Makarius
Fundamental Isabelle system environment: quasi-static module with
optional init operation.
*/
package isabelle
import java.io.{File => JFile, IOException, BufferedReader, InputStreamReader}
import java.nio.file.{Path => JPath, Files, SimpleFileVisitor, FileVisitResult}
import java.nio.file.attribute.BasicFileAttributes
import scala.collection.mutable
object Isabelle_System
{
/** bootstrap information **/
def jdk_home(): String =
{
val java_home = System.getProperty("java.home", "")
val home = new JFile(java_home)
val parent = home.getParent
if (home.getName == "jre" && parent != null &&
(new JFile(new JFile(parent, "bin"), "javac")).exists) parent
else java_home
}
def bootstrap_directory(
preference: String, envar: String, property: String, description: String): String =
{
def check(s: String): Option[String] =
if (s != null && s != "") Some(s) else None
val value =
check(preference) orElse // explicit argument
check(System.getenv(envar)) orElse // e.g. inherited from running isabelle tool
check(System.getProperty(property)) getOrElse // e.g. via JVM application boot process
error("Unknown " + description + " directory")
if ((new JFile(value)).isDirectory) value
else error("Bad " + description + " directory " + quote(value))
}
/** implicit settings environment **/
@volatile private var _settings: Option[Map[String, String]] = None
def settings(): Map[String, String] =
{
if (_settings.isEmpty) init() // unsynchronized check
_settings.get
}
def init(isabelle_root: String = "", cygwin_root: String = ""): Unit = synchronized {
if (_settings.isEmpty) {
import scala.collection.JavaConversions._
val isabelle_root1 =
bootstrap_directory(isabelle_root, "ISABELLE_ROOT", "isabelle.root", "Isabelle root")
val cygwin_root1 =
if (Platform.is_windows)
bootstrap_directory(cygwin_root, "CYGWIN_ROOT", "cygwin.root", "Cygwin root")
else ""
if (Platform.is_windows) Cygwin.init(isabelle_root1, cygwin_root1)
def set_cygwin_root()
{
if (Platform.is_windows)
_settings = Some(_settings.getOrElse(Map.empty) + ("CYGWIN_ROOT" -> cygwin_root1))
}
set_cygwin_root()
def default(env: Map[String, String], entry: (String, String)): Map[String, String] =
if (env.isDefinedAt(entry._1) || entry._2 == "") env
else env + entry
val env =
{
val temp_windows =
{
val temp = if (Platform.is_windows) System.getenv("TEMP") else null
if (temp != null && temp.contains('\\')) temp else ""
}
val user_home = System.getProperty("user.home", "")
val isabelle_app = System.getProperty("isabelle.app", "")
default(
default(
default(sys.env + ("ISABELLE_JDK_HOME" -> File.standard_path(jdk_home())),
"TEMP_WINDOWS" -> temp_windows),
"HOME" -> user_home),
"ISABELLE_APP" -> "true")
}
val settings =
{
val dump = JFile.createTempFile("settings", null)
dump.deleteOnExit
try {
val cmd1 =
if (Platform.is_windows)
List(cygwin_root1 + "\\bin\\bash", "-l",
File.standard_path(isabelle_root1 + "\\bin\\isabelle"))
else
List(isabelle_root1 + "/bin/isabelle")
val cmd = cmd1 ::: List("getenv", "-d", dump.toString)
val (output, rc) = process_output(process(cmd, env = env, redirect = true))
if (rc != 0) error(output)
val entries =
(for (entry <- File.read(dump).split("\u0000") if entry != "") yield {
val i = entry.indexOf('=')
if (i <= 0) entry -> ""
else entry.substring(0, i) -> entry.substring(i + 1)
}).toMap
entries + ("PATH" -> entries("PATH_JVM")) - "PATH_JVM"
}
finally { dump.delete }
}
_settings = Some(settings)
set_cygwin_root()
}
}
/* getenv */
def getenv(name: String, env: Map[String, String] = settings()): String =
env.getOrElse(name, "")
def getenv_strict(name: String, env: Map[String, String] = settings()): String =
proper_string(getenv(name, env)) getOrElse
error("Undefined Isabelle environment variable: " + quote(name))
def cygwin_root(): String = getenv_strict("CYGWIN_ROOT")
/** file-system operations **/
/* directories */
def mkdirs(path: Path): Unit =
if (!path.is_dir) {
bash("perl -e \"use File::Path make_path; make_path('" + File.standard_path(path) + "');\"")
if (!path.is_dir) error("Failed to create directory: " + quote(File.platform_path(path)))
}
def copy_dir(dir1: Path, dir2: Path): Unit =
bash("cp -a " + File.bash_path(dir1) + " " + File.bash_path(dir2)).check
/* tmp files */
private def isabelle_tmp_prefix(): JFile =
{
val path = Path.explode("$ISABELLE_TMP_PREFIX")
path.file.mkdirs // low-level mkdirs
File.platform_file(path)
}
def tmp_file(name: String, ext: String = ""): JFile =
{
val suffix = if (ext == "") "" else "." + ext
val file = Files.createTempFile(isabelle_tmp_prefix().toPath, name, suffix).toFile
file.deleteOnExit
file
}
def with_tmp_file[A](name: String, ext: String = "")(body: Path => A): A =
{
val file = tmp_file(name, ext)
try { body(File.path(file)) } finally { file.delete }
}
/* tmp dirs */
def rm_tree(root: Path): Unit = rm_tree(root.file)
def rm_tree(root: JFile)
{
root.delete
if (root.isDirectory) {
Files.walkFileTree(root.toPath,
new SimpleFileVisitor[JPath] {
override def visitFile(file: JPath, attrs: BasicFileAttributes): FileVisitResult =
{
Files.deleteIfExists(file)
FileVisitResult.CONTINUE
}
override def postVisitDirectory(dir: JPath, e: IOException): FileVisitResult =
{
if (e == null) {
Files.deleteIfExists(dir)
FileVisitResult.CONTINUE
}
else throw e
}
}
)
}
}
def tmp_dir(name: String): JFile =
{
val dir = Files.createTempDirectory(isabelle_tmp_prefix().toPath, name).toFile
dir.deleteOnExit
dir
}
def with_tmp_dir[A](name: String)(body: Path => A): A =
{
val dir = tmp_dir(name)
try { body(File.path(dir)) } finally { rm_tree(dir) }
}
/* quasi-atomic update of directory */
def update_directory(dir: Path, f: Path => Unit)
{
val new_dir = dir.ext("new")
val old_dir = dir.ext("old")
rm_tree(new_dir)
rm_tree(old_dir)
f(new_dir)
if (dir.is_dir) File.move(dir, old_dir)
File.move(new_dir, dir)
rm_tree(old_dir)
}
/** external processes **/
/* raw process */
def process(command_line: List[String],
cwd: JFile = null,
env: Map[String, String] = settings(),
redirect: Boolean = false): Process =
{
val proc = new ProcessBuilder
proc.command(command_line:_*) // fragile on Windows
if (cwd != null) proc.directory(cwd)
if (env != null) {
proc.environment.clear
for ((x, y) <- env) proc.environment.put(x, y)
}
proc.redirectErrorStream(redirect)
proc.start
}
def process_output(proc: Process): (String, Int) =
{
proc.getOutputStream.close
val output = File.read_stream(proc.getInputStream)
val rc =
try { proc.waitFor }
finally {
proc.getInputStream.close
proc.getErrorStream.close
proc.destroy
Thread.interrupted
}
(output, rc)
}
def kill(signal: String, group_pid: String): (String, Int) =
{
val bash =
if (Platform.is_windows) List(cygwin_root() + "\\bin\\bash.exe")
else List("/usr/bin/env", "bash")
process_output(process(bash ::: List("-c", "kill -" + signal + " -" + group_pid)))
}
/* GNU bash */
def bash(script: String,
cwd: JFile = null,
env: Map[String, String] = settings(),
redirect: Boolean = false,
progress_stdout: String => Unit = (_: String) => (),
progress_stderr: String => Unit = (_: String) => (),
progress_limit: Option[Long] = None,
strict: Boolean = true,
cleanup: () => Unit = () => ()): Process_Result =
{
Bash.process(script, cwd = cwd, env = env, redirect = redirect, cleanup = cleanup).
result(progress_stdout, progress_stderr, progress_limit, strict)
}
private lazy val gnutar_check: Boolean =
try { bash("tar --version").check.out.containsSlice("GNU tar") || error("") }
catch { case ERROR(_) => false }
def gnutar(args: String, cwd: JFile = null, redirect: Boolean = false): Process_Result =
{
if (gnutar_check) bash("tar " + args, cwd = cwd, redirect = redirect)
else error("Expected to find GNU tar executable")
}
def hostname(): String = bash("hostname -s").check.out
def open(arg: String): Unit =
bash("exec \"$ISABELLE_OPEN\" " + Bash.string(arg) + " >/dev/null 2>/dev/null &")
def pdf_viewer(arg: Path): Unit =
bash("exec \"$PDF_VIEWER\" " + File.bash_path(arg) + " >/dev/null 2>/dev/null &")
def export_isabelle_identifier(isabelle_identifier: String): String =
if (isabelle_identifier == "") ""
else "export ISABELLE_IDENTIFIER=" + Bash.string(isabelle_identifier) + "\n"
/** Isabelle resources **/
/* repository clone with Admin */
def admin(): Boolean = Path.explode("~~/Admin").is_dir
/* components */
def components(): List[Path] =
Path.split(getenv_strict("ISABELLE_COMPONENTS"))
/* fonts */
def fonts(html: Boolean = false): List[Path] =
{
val variables =
if (html) List("ISABELLE_FONTS", "ISABELLE_FONTS_HTML") else List("ISABELLE_FONTS")
for {
variable <- variables
path <- Path.split(Isabelle_System.getenv_strict(variable))
} yield path
}
/* default logic */
def default_logic(args: String*): String =
{
args.find(_ != "") match {
case Some(logic) => logic
case None => Isabelle_System.getenv_strict("ISABELLE_LOGIC")
}
}
}