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  • !12093

[Java] maven-compiler-plugin only once, because duplicates cause warnings

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Merged Administrator requested to merge github/fork/mikkomaunu/compiler-plugin-only-once-in-pom into master Apr 09, 2022
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Created by: mikkomaunu

Plugins must be unique. Formerly maven-compiler-plugin was configured twice. That produces warnings with following:

mvn clean install -f samples/client/petstore/java/jersey1/pom.xml (similar for mvn clean install -f samples/client/petstore/java/apache-httpclient/pom.xml)

[WARNING] Some problems were encountered while building the effective model for org.openapitools:petstore-java-client-jersey1:jar:1.0.0 [WARNING] 'build.plugins.plugin.(groupId:artifactId)' must be unique but found duplicate declaration of plugin org.apache.maven.plugins:maven-compiler-plugin @ line 150, column 21 [WARNING] [WARNING] It is highly recommended to fix these problems because they threaten the stability of your build. [WARNING] [WARNING] For this reason, future Maven versions might no longer support building such malformed projects.

Now configuration (target and source) is embedded to first one (which also happens to be newer version).

PR checklist

  • Read the contribution guidelines.
  • Pull Request title clearly describes the work in the pull request and Pull Request description provides details about how to validate the work. Missing information here may result in delayed response from the community.
  • Run the following to build the project and update samples:
    ./mvnw clean package 
    ./bin/generate-samples.sh
    ./bin/utils/export_docs_generators.sh
    Commit all changed files. This is important, as CI jobs will verify all generator outputs of your HEAD commit as it would merge with master. These must match the expectations made by your contribution. You may regenerate an individual generator by passing the relevant config(s) as an argument to the script, for example ./bin/generate-samples.sh bin/configs/java*. For Windows users, please run the script in Git BASH.
  • If your PR is targeting a particular programming language, @mention the technical committee members, so they are more likely to review the pull request. @bbdouglas (2017/07) @sreeshas (2017/08) @jfiala (2017/08) @lukoyanov (2017/09) @cbornet (2017/09) @jeff9finger (2018/01) @karismann (2019/03) @Zomzog (2019/04) @lwlee2608 (2019/10)
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Source branch: github/fork/mikkomaunu/compiler-plugin-only-once-in-pom