configuring existing eclipse java project to build using gradle

Question

I have an existing Java project in Eclipse. I want to implement builds using gradle. I tried using the gradle eclipse plugin as given here but ran into numerous errors in Eclipse.

I am using gradle 1.3, and I tried running gradle from command prompt, but I get compilation errors.

So my question is, does anyone know of some good resource which offers a how-to for converting an existing java project in Eclipse to compile using gradle. I also have some dependencies on other projects. The link to the tutorial I have given is not really helpful.

UPDATE: I can get gradle to work if my project doesn't have dependencies on other projects. However, if it does refer to some other project, I can't figure out how to reference another project? I have added the referenced project dir to repositories but I still get "class does not exist" errors. My gradle file is as below:

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

version='1.0-SNAPSHOT'

def repositoryPath = 'C:/Users/AMoody/workspace/temp/temp-protocols/'

repositories{
    mavenCentral()
    flatDir {
        dirs repositoryPath
    }
}

dependencies{

    compile 'org.slf4j:slf4j-api:1.+'
    compile 'junit:junit:4.+'
     testCompile 'junit:junit:4.+'

}

Answer 1

Okay, So if you have simple java project which has dir/file structure as below

Step-1: create file name build.gradle in project root directory as below

Step-2: add following gradle script in build.gradle

apply plugin: 'java'
apply plugin: 'eclipse'
archivesBaseName = 'someJar'
version = '1.0-SNAPSHOT' 

repositories {
    mavenCentral()
}

jar {
    manifest {
        attributes 'Main-Class': 'com.test.Run'
    }
}

dependencies {
   compile  'log4j:log4j:1.2.16'
} 

Step-3: close or delete from eclipse this project and import it again while selecting Gradle project as below

Now your project hierarchy will look like this. (Also note its added Gradle Dependencies while importing project)

Step-4: Create source foler src/main/java in project and move your all packages in that source folder.

Step-5 last but not the least: Cheers :)

So now your Simple Java project has converted into Gradle project!