How to download dependency sources for Gradle proj

Question

It appears that the eclipse plugin uses the following mechanism to do this:

apply plugin: 'java'
apply plugin: 'eclipse'

eclipse {
    classpath {
       downloadSources=true
    }
}

but I can't find a corresponding option for the idea plugin. What am I missing?

Here's the build.gradle file:

apply plugin: 'groovy'
apply plugin: 'idea'

repositories {
    mavenCentral()
    mavenRepo name: "Grails", url: "http://repo.grails.org/grails/repo/"
}

dependencies {
    groovy 'org.codehaus.groovy:groovy-all:2.0.4'
    compile 'org.slf4j:slf4j-log4j12:1.6.6', 'postgresql:postgresql:9.1-901.jdbc4', 'net.sourceforge.nekohtml:nekohtml:1.9.16'
    ['core', 'hibernate', 'plugin-datasource', 'plugin-domain-class'].each { plugin ->
        compile "org.grails:grails-$plugin:2.1.0"
    }
}

idea {
    module {
        downloadJavadoc = true
        downloadSources = true
    }
}

// Fat Jar Option (http://docs.codehaus.org/display/GRADLE/Cookbook#Cookbook-Creatingafatjar)
jar {
    from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
}

task wrapper(type: Wrapper) {
    gradleVersion = '1.0'
}

Answer 1

I've got problems with the following configuration:

idea {
    module {
        // if you hate browsing Javadoc
        downloadJavadoc = false

        // and love reading sources :)
        downloadSources = true
    }
}

repositories {
    mavenLocal()
    mavenCentral()
}

When removed mavenLocal() sources were downloaded and attached.

Answer 2

If you need to keep mavenLocal() repository due to dependencies on snapshot jars (or some other reasons), you can get the source jar using maven.

mvn dependency:get -Dartifact=GROUP_ID:ARTIFACT_ID:VERSION:jar:sources

For example,

mvn dependency:get -Dartifact=org.springframework:spring-core:5.1.2.RELEASE:jar:sources

Answer 3

I noticed that when you already have a jar downloaded then its sources and not downloading after changing build.gradle.

Removing .m2 from my home directory and calling gradle helped.