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https://issues.apache.org/jira/browse/MSHADE-345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17684326#comment-17684326
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Javier Neira Sanchez edited comment on MSHADE-345 at 2/6/23 6:49 AM:
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Hi! i am trying to reproduce the issue but i am not able to reproduce.
>From my tests i would say that the plugin is relocating scala code correctly.
{{package}} sentences are not included as a bytecode when compiling any jvm
lang to bytecode.
So i think that maybe the ide is interfering in the result and it is showing a
wrong package, cause it still think the class is the original and not the
shaded one. In fact my ide is showing me a similar decompilaed class file with
the wrong package.
My tests so far:
* I have this pom.xml:
{noformat}
<project>
<modelVersion>4.0.0</modelVersion>
<groupId>org.apache.maven.its.shade.rie</groupId>
<artifactId>test</artifactId>
<version>1.0</version>
<packaging>jar</packaging>
<name>MSHADE-345</name>
<description>
Test handling scala package relocation.
</description>
<dependencies>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api-scala_2.11</artifactId>
<version>12.0</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api-scala_2.12</artifactId>
<version>12.0</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api-scala_2.13</artifactId>
<version>12.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.2.4</version>
<executions>
<execution>
<id>attach-shade-211</id>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<shadedArtifactAttached>false</shadedArtifactAttached>
<artifactSet>
<includes>
<include>org.apache.logging.log4j:log4j-api-scala_2.11</include>
<include>org.scala-lang:scala-library</include>
</includes>
</artifactSet>
<relocations>
<relocation>
<pattern>org.apache.logging.log4j.scala</pattern>
<shadedPattern>relocated.scala211</shadedPattern>
</relocation>
<relocation>
<pattern>scala</pattern>
<shadedPattern>relocated.scala211</shadedPattern>
</relocation>
</relocations>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
{noformat}
* And i have a Main class using the classes being relocated:
{noformat}
import org.apache.logging.log4j.scala.Logger;
import org.apache.logging.log4j.scala.Logging;
import org.apache.logging.log4j.spi.ExtendedLogger;
public class Main {
public static void main(String[] args) {
System.out.println("Test" + Logger.FQCN());
Test t = new Test();
System.out.println("Logger: " + t.logger());
}
public static class Test implements Logging{
public ExtendedLogger logger() {
return null;
}
public void
org$apache$logging$log4j$scala$Logging$_setter_$logger_$eq(ExtendedLogger arg0)
{
return;
}
}
}
{noformat}
* The bytecode genetated for Main.class inside the shaded jar is:
||
{noformat}
Compiled from "Main.java"
public class Main {
public Main();
Code:
0: aload_0
1: invokespecial #12 // Method
java/lang/Object."<init>":()V
4: return public static void main(java.lang.String[]);
Code:
0: getstatic #22 // Field
java/lang/System.out:Ljava/io/PrintStream;
3: new #24 // class java/lang/StringBuilder
6: dup
7: invokespecial #25 // Method
java/lang/StringBuilder."<init>":()V
10: ldc #26 // String Test
12: invokevirtual #30 // Method
java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
15: invokestatic #36 // Method
relocated/scala211/Logger.FQCN:()Ljava/lang/String;
18: invokevirtual #30 // Method
java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
21: invokevirtual #39 // Method
java/lang/StringBuilder.toString:()Ljava/lang/String;
24: invokevirtual #45 // Method
java/io/PrintStream.println:(Ljava/lang/String;)V
27: new #7 // class Main$Test
30: dup
31: invokespecial #46 // Method Main$Test."<init>":()V
34: astore_1
35: getstatic #22 // Field
java/lang/System.out:Ljava/io/PrintStream;
38: new #24 // class java/lang/StringBuilder
41: dup
42: invokespecial #25 // Method
java/lang/StringBuilder."<init>":()V
45: ldc #48 // String Logger:
47: invokevirtual #30 // Method
java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
50: aload_1
51: invokevirtual #52 // Method
Main$Test.logger:()Lorg/apache/logging/log4j/spi/ExtendedLogger;
54: invokevirtual #55 // Method
java/lang/StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
57: invokevirtual #39 // Method
java/lang/StringBuilder.toString:()Ljava/lang/String;
60: invokevirtual #45 // Method
java/io/PrintStream.println:(Ljava/lang/String;)V
63: return
}{noformat}
As you can check in the bytecode
{{org.apache.logging.log4j.scala.Logger.FQCN()}} has been relocated to
{{Method relocated/scala211/Logger.FQCN)Ljava/lang/String;}}
{color:#569cd6} {color}
was (Author: jneira):
Hi! i am trying to reproduce the issue but i am not sure on how do it:
I have this pom.xml:
{noformat}
<project>
<modelVersion>4.0.0</modelVersion>
<groupId>org.apache.maven.its.shade.rie</groupId>
<artifactId>test</artifactId>
<version>1.0</version>
<packaging>jar</packaging>
<name>MSHADE-345</name>
<description>
Test handling scala package relocation.
</description>
<dependencies>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api-scala_2.11</artifactId>
<version>12.0</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api-scala_2.12</artifactId>
<version>12.0</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api-scala_2.13</artifactId>
<version>12.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.2.4</version>
<executions>
<execution>
<id>attach-shade-211</id>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<shadedArtifactAttached>false</shadedArtifactAttached>
<artifactSet>
<includes>
<include>org.apache.logging.log4j:log4j-api-scala_2.11</include>
<include>org.scala-lang:scala-library</include>
</includes>
</artifactSet>
<relocations>
<relocation>
<pattern>org.apache.logging.log4j.scala</pattern>
<shadedPattern>relocated.scala211</shadedPattern>
</relocation>
<relocation>
<pattern>scala</pattern>
<shadedPattern>relocated.scala211</shadedPattern>
</relocation>
</relocations>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
{noformat}
An i have a Main class using the classes being relocated:
As you can check in the bytecode
org{color:#d4d4d4}.{color}{color:#4ec9b0}apache{color}{color:#d4d4d4}.{color}{color:#4ec9b0}logging{color}{color:#d4d4d4}.{color}{color:#4ec9b0}log4j{color}{color:#d4d4d4}.{color}{color:#4ec9b0}scala{color}{color:#d4d4d4}.{color}{color:#4ec9b0}Logger{color}{color:#d4d4d4}.{color}{color:#dcdcaa}FQCN{color}{color:#d4d4d4}(){color}
has been relocated to {color:#569cd6}Method{color}{color:#6a9955}
{color}{color:#4ec9b0}relocated/scala211/Logger{color}{color:#569cd6}.{color}{color:#dcdcaa}FQCN{color}{color:#569cd6}:()L{color}{color:#4ec9b0}java/lang/String{color}{color:#569cd6};{color}
{color:#569cd6} {color}
> Package relocation appears not to work with Scala
> -------------------------------------------------
>
> Key: MSHADE-345
> URL: https://issues.apache.org/jira/browse/MSHADE-345
> Project: Maven Shade Plugin
> Issue Type: Bug
> Reporter: Graham Pople
> Priority: Major
> Attachments: image (4).png
>
>
> (Apologies if this is a known issue, I searched but couldn't find it.)
> I have a small pom.xml that's simply pulling in two dependent libraries from
> Maven, and shading them:
> {code:java}
> <?xml version="1.0" encoding="UTF-8"?>
> <project xmlns="http://maven.apache.org/POM/4.0.0";
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
> http://maven.apache.org/maven-v4_0_0.xsd";>
> <modelVersion>4.0.0</modelVersion>
> <groupId>com.couchbase.client</groupId>
> <artifactId>scala-deps</artifactId>
> <version>1.1.1-SNAPSHOT</version>
> <packaging>jar</packaging>
> <name>Couchbase Scala Dependencies</name>
> <description>Shadowing dependencies for Scala prokect</description>
> <dependencies>
> <dependency>
> <groupId>com.github.plokhotnyuk.jsoniter-scala</groupId>
> <artifactId>jsoniter-scala-core_2.12</artifactId>
> <version>1.0.0</version>
> </dependency>
> <dependency>
> <groupId>com.github.plokhotnyuk.jsoniter-scala</groupId>
> <artifactId>jsoniter-scala-macros_2.12</artifactId>
> <version>1.0.0</version>
> </dependency>
> </dependencies>
> <build>
> <plugins>
> <plugin>
> <groupId>org.apache.maven.plugins</groupId>
> <artifactId>maven-shade-plugin</artifactId>
> <version>3.2.1</version>
> <configuration>
> <relocations>
> <relocation>
> <pattern>com.github.plokhotnyuk</pattern>
>
> <shadedPattern>com.couchbase.client.scala.deps.plokhotnyuk</shadedPattern>
> </relocation>
> </relocations>
> <createSourcesJar>true</createSourcesJar>
> <shadeSourcesContent>true</shadeSourcesContent>
> <shadedArtifactAttached>true</shadedArtifactAttached>
> </configuration>
> <executions>
> <execution>
> <phase>package</phase>
> <goals>
> <goal>shade</goal>
> </goals>
> </execution>
> </executions>
> </plugin>
> </plugins>
> </build>
> </project> {code}
> From this I expect to get an uber-jar containing those dependencies, with
> classfiles inside
> com/couchbase/client/scala/deps/plokhotnyuk/jsoniter_scala/..., and with
> those files starting "package com.couchbase.client.scala.deps.plokhotnyuk...".
> However, while the files are moved to the correct file structure, the package
> names aren't adjusted. Here's a screenshot from the sources jar:
> !image (4).png!
>
> And my experiments with the binary jar itself seem to indicate that the same
> issue exists at the bytecode level in the regular jar too, e.g. the
> classfiles are in the right place but the package hasn't been changed.
>
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