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Merge pull request #991 from coursier/topic/bootstrap-library
Move bootstrap generation to separate library
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59 changes: 59 additions & 0 deletions
59
...-launcher/src/main/java/coursier/bootstrap/launcher/BootstrapURLStreamHandlerFactory.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| package coursier.bootstrap.launcher; | ||
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|
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| import java.io.FileNotFoundException; | ||
| import java.io.IOException; | ||
| import java.net.URL; | ||
| import java.net.URLConnection; | ||
| import java.net.URLStreamHandler; | ||
| import java.net.URLStreamHandlerFactory; | ||
| import java.util.Random; | ||
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| // JARs from JARs can't be used directly, see: | ||
| // http://stackoverflow.com/questions/183292/classpath-including-jar-within-a-jar/2326775#2326775 | ||
| // Loading them via a custom protocol, inspired by: | ||
| // http://stackoverflow.com/questions/26363573/registering-and-using-a-custom-java-net-url-protocol/26409796#26409796 | ||
| public class BootstrapURLStreamHandlerFactory implements URLStreamHandlerFactory { | ||
| private final String bootstrapProtocol; | ||
| private final String basePath; | ||
| private final ClassLoader loader; | ||
| private boolean registered = false; | ||
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| public BootstrapURLStreamHandlerFactory(String bootstrapProtocol, String basePath, ClassLoader loader) { | ||
| this.bootstrapProtocol = bootstrapProtocol; | ||
| this.basePath = basePath; | ||
| this.loader = loader; | ||
| } | ||
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| public BootstrapURLStreamHandlerFactory(String basePath, ClassLoader loader) { | ||
| Random rng = new Random(); | ||
| this.bootstrapProtocol = "bootstrap" + rng.nextLong(); | ||
| this.basePath = basePath; | ||
| this.loader = loader; | ||
| } | ||
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| public URLStreamHandler createURLStreamHandler(String protocol) { | ||
| return bootstrapProtocol.equals(protocol) ? new URLStreamHandler() { | ||
| protected URLConnection openConnection(URL url) throws IOException { | ||
| String path = url.getPath(); | ||
| URL resURL = loader.getResource(basePath + path); | ||
| if (resURL == null) | ||
| throw new FileNotFoundException("Resource " + basePath + path); | ||
| return resURL.openConnection(); | ||
| } | ||
| } : null; | ||
| } | ||
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| public String getProtocol() { | ||
| registerIfNeeded(); | ||
| return bootstrapProtocol; | ||
| } | ||
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| public void register() { | ||
| URL.setURLStreamHandlerFactory(this); | ||
| registered = true; | ||
| } | ||
| public void registerIfNeeded() { | ||
| if (!registered) | ||
| register(); | ||
| } | ||
| } |
2 changes: 1 addition & 1 deletion
2
...ursier/bootstrap/IsolatedClassLoader.java → ...otstrap/launcher/IsolatedClassLoader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| scala_library( | ||
| name = "bootstrap", | ||
| dependencies = [ | ||
| ], | ||
| sources = rglobs("*.scala"), | ||
| ) |
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