Improved support for multi-module maven projects #210
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| <groupId>com.diffplug.spotless</groupId> | ||
| <artifactId>spotless-maven-plugin-tests-parent</artifactId> | ||
| <version>1.0.0-SNAPSHOT</version> | ||
| <relativePath>..</relativePath> |
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This is the default anyway. No need to specify it.
nedtwigg
approved these changes
Feb 23, 2018
|
Thanks for reviewing! I'll fix |
Some steps in the maven plugin require paths to configuration files. For example eclipse formatter and scalafmt. In multi-module maven projects it is desirable to specify paths only once and not duplicate configs in multiple modules. Each sub-project should not assume anything about the general project structure and should not refer to files in parent modules using relative paths. It is recommended to create a separate module with configuration files and depend on it in the plugin. This approach is taken by the Checkstyle and PMD plugins: http://maven.apache.org/plugins/maven-checkstyle-plugin/examples/multi-module-config.html https://maven.apache.org/plugins/maven-pmd-plugin/examples/multi-module-config.html Such approach means configuration files no longer live within the project and might be inside a JAR. Thus specified value of `<file>` require special resolution. Both Checkstyle and PMD use builtin plexus `ResourceManager` which is able to locate files from regular file system, URL or JAR. Located file is then copied to the output directory (usually `./target/`) and used as a regular file. This commit makes spotless plugin also use `ResourceManager` in order to support multi-module configuration with config files in a dedicated module. Every step that contains `<file>` is updated to perform the resolution. It is also possible to specify configuration file URLs, though this feature is not tested.
It's default value is `..` so no need to be explicit about it.
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Some steps in the maven plugin require paths to configuration files. For example eclipse formatter and scalafmt. In multi-module maven projects it is desirable to specify paths only once and not duplicate configs in multiple modules. Each sub-project should not assume anything about the general project structure and should not refer to files in parent modules using relative paths. It is recommended to create a separate module with configuration files and depend on it in the plugin. This approach is taken by the Checkstyle and PMD plugins:
http://maven.apache.org/plugins/maven-checkstyle-plugin/examples/multi-module-config.html
https://maven.apache.org/plugins/maven-pmd-plugin/examples/multi-module-config.html
Such approach means configuration files no longer live within the project and might be inside a JAR. Thus specified value of
<file>require special resolution.Both Checkstyle and PMD use builtin plexus
ResourceManagerwhich is able to locate files from regular file system, URL or JAR. Located file is then copied to the output directory (usually./target/) and used as a regular file.This commit makes spotless plugin also use
ResourceManagerin order to support multi-module configuration with config files in a dedicated module. Every step that contains<file>is updated to perform the resolution. It is also possible to specify configuration file URLs, though this feature is not tested.