构建gradle插件

Question

I'm developing a gradle plugin alongside with a project:

plugin_consumer
  |
  + build.gradle
  + src/

plugin
  |
  + build.gradle 
  + libs/
  + src/

All jars are moved to plugin/libs after built, and plugin consumer module uses plugin like so:

buildscript {
  repositories {
  // ...
  }
  dependencies {
    classpath fileTree(dir:'../plugin/libs', include: ['*.jar'])
  }
} 

apply plugin: 'my.custom.plugin'

I tested and this setup worked fine, however the plugin .jar is being built without dependencies, and as soon as I add some dependencies to the project the consumer buildscript started crashing because of NoClassDefFoundError exceptions. The problem is when I build a fat jar instead the script no longer finds plugin:

// from plugin/build.gradle 
// Configurations to build jar with dependencies
configurations {
  jar.archiveName = 'plugin.jar'
}
jar {
  archiveName = 'plugin.jar'
  baseName = project.name + '-all'
  from { configurations.compile.collect {
    println it
    it.isDirectory() ? it : zipTree(it)
  } }
}

Running commands on plugin_consumer project throws error:

> Failed to apply plugin [id 'my.custom.plugin']
   > Plugin with id 'my.custom.plugin' not found.

Answer 1

I haven't identified the problem, but have found a solution. Somehow the jar instruction to package all of the sources have messed up the plugin jar file. The following configurations have worked on plugin side instead:

//...
jar {
  from {
    configurations.compileWithDependencies.collect { it.isDirectory() ? it : zipTree(it) }
  }
}

configurations {
  compileWithDependencies
}

dependencies {
  compile gradleApi()
  compileWithDependencies 'my.dependency1'
  compileWithDependencies 'my.dependency1'
  testCompile 'test.dependency'

  configurations.compile.extendsFrom(configurations.compileWithDependencies)
}

From the looks of it I would guess that gradleApi() dependencies should not be compiled into the plugin jar.