CODEWITHSUNDEEP
androidgradleandroid-gradle-plugin
Luis Artola
Luis Artola

Reputation: 811

Copy file based on flavor at the start of Android gradle build

I have two flavors in the gradle file for an Android app:

productFlavors {
    production { }
    devel { }
}

I have a configuration file that I need to copy to the app/ directory before any other tasks run when building the project. The is a configuration file per flavor, i.e.:

etc/configuration-production.json
etc/configuration-devel.json

When building devel I need to do essentially this:

cp etc/configuration-devel.json app/configuration.json

When building production:

cp etc/configuration-production.json app/configuration.json

How do I automate this in gradle? This copy needs to happen first and foremost when executing a build since some of the tasks need that app/configuration.json file to be there.

I tried:

task copyConfig(type: Copy) {
     from "etc/configuration-${Flavor.name}.json"
     into "app/configuration.json"
} 

build.dependsOn copyConfig

But didn't work. The copyConfig task didn't run.

Upvotes: 3

Views: 2591

Answers (1)

Bertrand Martel
Bertrand Martel

Reputation: 45402

You can add the following to your app build.gradle for copying your file from etc/configuration-XXX.json to app/configuration.json in the first statement of the respective tasks assembleDevel.* & assembleProduction.* :

def cp(copyType) {
    println "copying " + "../etc/configuration-" + copyType + ".json"
    copy {
        from "../etc/configuration-" + copyType + ".json"
        into '.'
        rename { String fileName ->
            fileName.replace("configuration-" + copyType + ".json", "configuration.json")
        }
    }
}

tasks.whenTaskAdded { task ->
    if (task.name ==~ /assembleDevel.*/) {
        task.doFirst() {
            cp("devel")
        }
    } else if (task.name ==~ /assembleProduction.*/) {
        task.doFirst() {
            cp("production")
        }
    }
}

This is the required configuration : 

app/
├── build.gradle
etc/
├── configuration-production.json
└── configuration-devel.json

If assembleDevel.*/assembleProduction.* are not the tasks you are looking for, you can replace them with for instance : prepareDevel.*Dependencies/prepareProduction.*Dependencies

Upvotes: 4

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