android {
    defaultConfig {
        //optional
        roboVersioningFlavor {
            versioningCalculator TAG_DESCRIBE_DIGIT_RC
        }
    }
    buildTypes {
        release {
            //optional
            roboVersioningFlavor {
                versioningCalculator TAG_DIGIT
            }
        }
    }

    flavorDimensions 'dimension'

    productFlavors {
        flavor {
            dimension "dimension"
            //optional
            roboVersioningFlavor {
                versioningCalculator TAG_DIGIT_RC
            }
        }
        flavor2{
            dimension "dimension"
        }
    }
}

roboVersioning {
    //configure git
    git {
        //change path to the git executable file
        gitPath = 'path_to_git'
        //add additional params to get tags command
        tagsParams = '--first-parent'
        //add additional params to describe command
        describeParams = '--first-parent'
    }
    //or you can set your own Git implementation
    git new Git() {
        @Override
        List<Git.Tag> tags() {
            return null
        }

        @Override
        String describe(String s) {
            return null
        }
    }
    
    //use it to disable plugin's logger
    quiet()
    //or to set your own logger
    logger {message -> println(message)}
}

android {}

roboVersioningFlavor {
    versioningCalculator customDigitTag {
        //you can customize standard digit versioning calculator
        
        //required. Regex pattern.
        pattern = "(\\d+).(\\d+).(\\d+)"
        //required. Used in the case if where is no valid tag for this calculator. You can set Map or Closure.
        emptyVersion = ["name": "empty", "code": 123]
        //optional. Additional tag validation. You can set boolean on Closure.
        valid = {tag -> tag.hash == "123"} 
        //optional. You can calculate your own code based on parsed int array. You can set Integer or Closure.
        versionCode = {tagParts -> tagParts[0]}
         //optional. You can calculate your own name based on git tag. You can set String or Closure.
        versionName = {tag -> "custom_version_name"}
    }
}

roboVersioningFlavor {
    versioningCalculator { git, variant ->
        //you can extract data from git here
        def tags = git.tags()
        def describeTags = git.execute("describe --tags")
        //do something and reurn result as below
        ['name': 'custom', 'code': 123]
    }
}

buildscript {
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath 'com.github.zellius:robo-versioning:x.y.z'
    }
}
//apply robo-versioning plugin after android plugin (application, library)
apply plugin: 'com.android.application'
apply plugin: 'com.github.zellius.robo-versioning'