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Use an agent to support processes launched with redirected io, fixes a…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| <!-- | ||
| Copyright 2021 the original author or authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| --> | ||
| <project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0" | ||
| xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> | ||
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| <modelVersion>4.0.0</modelVersion> | ||
| <parent> | ||
| <groupId>org.mvndaemon.mvnd</groupId> | ||
| <artifactId>mvnd</artifactId> | ||
| <version>0.2.1-SNAPSHOT</version> | ||
| </parent> | ||
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| <artifactId>mvnd-agent</artifactId> | ||
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| <packaging>jar</packaging> | ||
| <name>Maven Daemon - Agent</name> | ||
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| <dependencies> | ||
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| <dependency> | ||
| <groupId>org.javassist</groupId> | ||
| <artifactId>javassist</artifactId> | ||
| </dependency> | ||
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| </dependencies> | ||
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| <build> | ||
| <plugins> | ||
| <plugin> | ||
| <groupId>org.apache.maven.plugins</groupId> | ||
| <artifactId>maven-jar-plugin</artifactId> | ||
| <configuration> | ||
| <archive> | ||
| <manifestEntries> | ||
| <Premain-Class>org.mvndaemon.mvnd.agent.Agent</Premain-Class> | ||
| <Boot-Class-Path>mvnd-pump-${version}.jar</Boot-Class-Path> | ||
| </manifestEntries> | ||
| </archive> | ||
| </configuration> | ||
| </plugin> | ||
| </plugins> | ||
| </build> | ||
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| </project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| /* | ||
| * Copyright 2021 the original author or authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.mvndaemon.mvnd.agent; | ||
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| import java.lang.instrument.ClassFileTransformer; | ||
| import java.lang.instrument.IllegalClassFormatException; | ||
| import java.lang.instrument.Instrumentation; | ||
| import java.security.ProtectionDomain; | ||
| import javassist.ClassPool; | ||
| import javassist.CtClass; | ||
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| public class Agent { | ||
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| public static final String START_WITH_PIPES = "if (redirects != null\n" | ||
| + " && redirects[1] == ProcessBuilder$Redirect.INHERIT\n" | ||
| + " && redirects[2] == ProcessBuilder$Redirect.INHERIT) {\n" | ||
| + " redirects[1] = redirects[2] = ProcessBuilder$Redirect.PIPE;" | ||
| + " Process p = start(redirects);\n" | ||
| + " PumpThread.start(p.getInputStream(), System.out);\n" | ||
| + " PumpThread.start(p.getErrorStream(), System.err);\n" | ||
| + " return p;\n" | ||
| + "}"; | ||
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| public static void premain(String args, Instrumentation instrumentation) throws Exception { | ||
| instrumentation.addTransformer(new ClassFileTransformer() { | ||
| @Override | ||
| public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, | ||
| ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException { | ||
| if ("java/lang/ProcessBuilder".equals(className)) { | ||
| try { | ||
| ClassPool pool = ClassPool.getDefault(); | ||
| CtClass clazz = pool.get("java.lang.ProcessBuilder"); | ||
| pool.importPackage("org.mvndaemon.mvnd.pump"); | ||
| clazz.getDeclaredMethod("start", | ||
| new CtClass[] { clazz.getClassPool().get("java.lang.ProcessBuilder$Redirect[]") }) | ||
| .insertBefore(START_WITH_PIPES); | ||
| byte[] data = clazz.toBytecode(); | ||
| clazz.detach(); | ||
| return data; | ||
| } catch (Throwable e) { | ||
| throw new IllegalClassFormatException(e.toString()); | ||
| } | ||
| } else { | ||
| return classfileBuffer; | ||
| } | ||
| } | ||
| }); | ||
| } | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| <!-- | ||
| Copyright 2021 the original author or authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| --> | ||
| <project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0" | ||
| xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> | ||
|
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| <modelVersion>4.0.0</modelVersion> | ||
| <parent> | ||
| <groupId>org.mvndaemon.mvnd</groupId> | ||
| <artifactId>mvnd</artifactId> | ||
| <version>0.2.1-SNAPSHOT</version> | ||
| </parent> | ||
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| <artifactId>mvnd-pump</artifactId> | ||
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| <packaging>jar</packaging> | ||
| <name>Maven Daemon - Pump</name> | ||
|
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| </project> |
56 changes: 56 additions & 0 deletions
56
pump/src/main/java/org/mvndaemon/mvnd/pump/PumpThread.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| /* | ||
| * Copyright 2021 the original author or authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.mvndaemon.mvnd.pump; | ||
|
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| import java.io.BufferedReader; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.io.InputStreamReader; | ||
| import java.io.PrintStream; | ||
| import java.io.UncheckedIOException; | ||
|
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| public class PumpThread extends Thread { | ||
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| private final InputStream stream; | ||
| private final PrintStream out; | ||
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| public static void start(InputStream stream, PrintStream out) { | ||
| new PumpThread(stream, out).start(); | ||
| } | ||
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| public PumpThread(InputStream stream, PrintStream out) { | ||
| this.stream = stream; | ||
| this.out = out; | ||
| } | ||
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| @Override | ||
| public void run() { | ||
| try { | ||
| BufferedReader reader = new BufferedReader(new InputStreamReader(stream)); | ||
| try { | ||
| String line; | ||
| while ((line = reader.readLine()) != null) { | ||
| out.println(line); | ||
| } | ||
| } finally { | ||
| reader.close(); | ||
| } | ||
| } catch (IOException e) { | ||
| throw new UncheckedIOException(e); | ||
| } | ||
| } | ||
|
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| } |