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package cbt;
import java.io.*;
import java.lang.reflect.*;
import java.net.*;
import java.security.*;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
import static cbt.Stage0Lib.*;
import static java.io.File.pathSeparator;
/**
* This launcher allows to start the JVM without loading anything else permanently into its
* classpath except for the launcher itself. That's why it is written in Java without
* dependencies outside the JDK.
*/
public class NailgunLauncher{
/** Persistent cache for caching classloaders for the JVM life time. */
private final static ClassLoaderCache2<ClassLoader> classLoaderCache = new ClassLoaderCache2<ClassLoader>(
new ConcurrentHashMap<String,Object>(),
new ConcurrentHashMap<Object,ClassLoader>()
);
public final static SecurityManager initialSecurityManager
= System.getSecurityManager();
public final static ThreadLocal<Boolean> trapExitCode =
new ThreadLocal<Boolean>() {
@Override protected Boolean initialValue() {
return false;
}
};
public static String TARGET = System.getenv("TARGET");
private static String NAILGUN = "nailgun_launcher/";
private static String STAGE1 = "stage1/";
@SuppressWarnings("unchecked")
public static Object getBuild( Object context ) throws Throwable{
BuildStage1Result res = buildStage1(
(Boolean) get(context, "cbtHasChangedCompat"),
(Long) get(context, "startCompat"),
((File) get(context, "cache")).toString() + "/",
((File) get(context, "cbtHome")).toString(),
((File) get(context, "compatibilityTarget")).toString() + "/",
new ClassLoaderCache2<ClassLoader>(
(ConcurrentHashMap<String,Object>) get(context, "permanentKeys"),
(ConcurrentHashMap<Object,ClassLoader>) get(context, "permanentClassLoaders")
)
);
return
res
.classLoader
.loadClass("cbt.Stage1")
.getMethod( "getBuild", Object.class, Boolean.class )
.invoke(null, context, res.changed);
}
public static void main( String[] args ) throws Throwable {
Long _start = System.currentTimeMillis();
if(args[0].equals("check-alive")){
System.exit(33);
return;
}
System.setSecurityManager( new TrapSecurityManager() );
installProxySettings();
String[] diff = args[0].split("\\.");
long start = _start - (Long.parseLong(diff[0]) * 1000L) - Long.parseLong(diff[1]);
_assert(System.getenv("CBT_HOME") != null, "environment variable CBT_HOME not defined");
String CBT_HOME = System.getenv("CBT_HOME");
String cache = CBT_HOME + "/cache/";
String compatibilityTarget = CBT_HOME + "/compatibility/" + TARGET;
BuildStage1Result res = buildStage1(
false, start, cache, CBT_HOME, compatibilityTarget, classLoaderCache
);
try{
System.exit(
(Integer) res
.classLoader
.loadClass("cbt.Stage1")
.getMethod(
"run",
String[].class, File.class, File.class, Boolean.class,
File.class, Long.class, ConcurrentHashMap.class, ConcurrentHashMap.class
)
.invoke(
null,
(Object) args, new File(cache), new File(CBT_HOME), res.changed,
new File(compatibilityTarget), start, classLoaderCache.keys, classLoaderCache.values
)
);
} catch (java.lang.reflect.InvocationTargetException e) {
throw unwrapInvocationTargetException(e);
}
}
public static Throwable unwrapInvocationTargetException(Throwable e){
if(e instanceof java.lang.reflect.InvocationTargetException){
return unwrapInvocationTargetException(((java.lang.reflect.InvocationTargetException) e).getCause());
} else{
return e;
}
}
public static BuildStage1Result buildStage1(
Boolean changed, long start, String cache, String cbtHome, String compatibilityTarget, ClassLoaderCache2<ClassLoader> classLoaderCache
) throws Throwable {
_assert(TARGET != null, "environment variable TARGET not defined");
String nailgunTarget = cbtHome + "/" + NAILGUN + TARGET;
String stage1Sources = cbtHome + "/" + STAGE1;
String stage1Target = stage1Sources + TARGET;
File compatibilitySources = new File(cbtHome + "/compatibility");
String mavenCache = cache + "maven";
String mavenUrl = "https://repo1.maven.org/maven2";
ClassLoader rootClassLoader = new CbtURLClassLoader( new URL[]{}, ClassLoader.getSystemClassLoader().getParent() ); // wrap for caching
EarlyDependencies earlyDeps = new EarlyDependencies(mavenCache, mavenUrl, classLoaderCache, rootClassLoader);
ClassLoader compatibilityClassLoader;
if(!compatibilityTarget.startsWith(cbtHome)){
compatibilityClassLoader = classLoaderCache.get( compatibilityTarget );
} else {
List<File> compatibilitySourceFiles = new ArrayList<File>();
for( File f: compatibilitySources.listFiles() ){
if( f.isFile() && (f.toString().endsWith(".scala") || f.toString().endsWith(".java")) ){
compatibilitySourceFiles.add(f);
}
}
changed = compile(changed, start, "", compatibilityTarget, earlyDeps, compatibilitySourceFiles);
if( classLoaderCache.contains( compatibilityTarget ) ){
compatibilityClassLoader = classLoaderCache.get( compatibilityTarget );
} else {
compatibilityClassLoader = classLoaderCache.put( classLoader(compatibilityTarget, rootClassLoader), compatibilityTarget );
}
}
String[] nailgunClasspathArray = append( earlyDeps.classpathArray, nailgunTarget );
String nailgunClasspath = classpath( nailgunClasspathArray );
ClassLoader nailgunClassLoader = new CbtURLClassLoader( new URL[]{}, NailgunLauncher.class.getClassLoader() ); // wrap for caching
if( !classLoaderCache.contains( nailgunClasspath ) ){
nailgunClassLoader = classLoaderCache.put( nailgunClassLoader, nailgunClasspath );
}
String[] stage1ClasspathArray =
append( append( nailgunClasspathArray, compatibilityTarget ), stage1Target );
String stage1Classpath = classpath( stage1ClasspathArray );
List<File> stage1SourceFiles = new ArrayList<File>();
for( File f: new File(stage1Sources).listFiles() ){
if( f.isFile() && f.toString().endsWith(".scala") ){
stage1SourceFiles.add(f);
}
}
changed = compile(changed, start, stage1Classpath, stage1Target, earlyDeps, stage1SourceFiles);
ClassLoader stage1classLoader;
if( !changed && classLoaderCache.contains( stage1Classpath ) ){
stage1classLoader = classLoaderCache.get( stage1Classpath );
} else {
stage1classLoader =
classLoaderCache.put(
classLoader(
stage1Target,
new MultiClassLoader2(
nailgunClassLoader,
compatibilityClassLoader,
earlyDeps.classLoader
)
),
stage1Classpath
);
}
return new BuildStage1Result(
changed,
stage1classLoader
);
}
}
class BuildStage1Result{
Boolean changed;
ClassLoader classLoader;
BuildStage1Result( Boolean changed, ClassLoader classLoader ){
this.changed = changed;
this.classLoader = classLoader;
}
}
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