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https://issues.apache.org/jira/browse/MBUILDCACHE-35?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17676971#comment-17676971
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Alexander Ashitkin commented on MBUILDCACHE-35:
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I will try to reproduce it, but so far looks like attaching the shaded artifact
with a different classifier could be a working workaround.
> Incorrect pom is put to local repo for module with maven-shade-plugin
> ---------------------------------------------------------------------
>
> Key: MBUILDCACHE-35
> URL: https://issues.apache.org/jira/browse/MBUILDCACHE-35
> Project: Maven Build Cache Extension
> Issue Type: Bug
> Reporter: Maximilian Novikov
> Priority: Major
>
> Original reporter: spirin.an...@gmail.com
> There is an issue with maven incremental build if module uses maven-shade
> plugin. If user executes mvnw clean install command and module is not changed
> then wrong pom file will be put into local maven repository and it will break
> module dependencies.
> Steps to reproduce:
> # create a module with dependencies and with maven-shade plugin (see below)
> # build module using incremental build: mvnw clean install (install command
> is required to put artifact into local maven repo)
> # change something in module to trigger incremental build (for instance some
> symbols here <exclude>META-INF/test-run-01.txt</exclude>)
> # build module again: mvnw clean install
> # check that local repo has correct dependency reduced pom (ie pom file
> loaded into the repo does not have dependencies
> org.apache.commons:commons-lang3)
> {code:java}
> [devbox ~/.m2/repository/com/db/test/mvnbuild/mvnbuild-test/1.0]$ ll
> -rw-r--r--. 1 devbox users 716 Dec 13 09:49 maven-metadata-local.xml
> -rw-r--r--. 1 devbox users 584570 Dec 13 09:49 mvnbuild-test-1.0.jar
> -rw-r--r--. 1 devbox users 1512 Dec 13 09:49 mvnbuild-test-1.0.pom
> -rw-r--r--. 1 devbox users 208 Dec 13 09:49 _remote.repositories
> [devbox ~/.m2/repository/com/db/test/mvnbuild/mvnbuild-test/1.0]$ less
> mvnbuild-test-1.0.pom
> {code}
> # do not change module and build it again: mvnw clean install
> *Expected:* local repositiry should have dependency reduced pom
> *Actual:* local repo has a pom file taken from source code ie with all
> dependencies
> As a result in class path there will be duplicated set of class files:
> # from shaded module
> # due to this defect from org.apache.commons:commons-lang3
> *Original POM*
> {code:java}
> <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/xsd/maven-4.0.0.xsd";>
> <modelVersion>4.0.0</modelVersion>
> <groupId>com.db.test.mvnbuild</groupId>
> <artifactId>mvnbuild-test</artifactId>
> <version>1.0</version>
> <packaging>jar</packaging>
> <name>MvnTest</name>
> <dependencies>
> <dependency>
> <groupId>org.apache.commons</groupId>
> <artifactId>commons-lang3</artifactId>
> <version>3.11</version>
> </dependency>
> </dependencies>
> <build>
> <plugins>
> <plugin>
> <groupId>org.apache.maven.plugins</groupId>
> <artifactId>maven-shade-plugin</artifactId>
> <version>3.4.1</version>
> <executions>
> <execution>
> <phase>package</phase>
> <goals>
> <goal>shade</goal>
> </goals>
> </execution>
> </executions>
> <configuration>
>
> <createDependencyReducedPom>true</createDependencyReducedPom>
> <artifactSet>
> <includes>
>
> <include>org.apache.commons:commons-lang3</include>
> </includes>
> </artifactSet>
> <filters>
> <filter>
> <artifact>*:*</artifact>
> <excludes>
> <exclude>META-INF/test-run-01.txt</exclude>
> </excludes>
> </filter>
> </filters>
> </configuration>
> </plugin>
> </plugins>
> </build>
> </project>
> {code}
> *Dependency reduced POM*
> {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.db.test.mvnbuild</groupId>
> <artifactId>mvnbuild-test</artifactId>
> <name>MvnTest</name>
> <version>1.0</version>
> <build>
> <plugins>
> <plugin>
> <artifactId>maven-shade-plugin</artifactId>
> <version>3.4.1</version>
> <executions>
> <execution>
> <phase>package</phase>
> <goals>
> <goal>shade</goal>
> </goals>
> </execution>
> </executions>
> <configuration>
> <createDependencyReducedPom>true</createDependencyReducedPom>
> <artifactSet>
> <includes>
> <include>org.apache.commons:commons-lang3</include>
> </includes>
> </artifactSet>
> <filters>
> <filter>
> <artifact>*:*</artifact>
> <excludes>
> <exclude>META-INF/test-run-01.txt</exclude>
> </excludes>
> </filter>
> </filters>
> </configuration>
> </plugin>
> </plugins>
> </build>
> </project>{code}
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