Gradle: Plugin with id 'android-library' not found

Question

I'm trying to automate my projects with Gradle.

I have several apps and one library project. After having read carefully the official doc, this is a simplified view of my build.gradle:

buildscript {
    repositories {
        mavenCentral()
        maven {
            url "http://saturday06.github.io/gradle-android-scala-plugin/repository/snapshot"
        }
    }
    dependencies {
        // 0.8.3 con Gradle 1.10
        classpath 'org.gradle.api.plugins:gradle-android-plugin:1.2.1'
    }
}

apply plugin: 'idea'

project(':MyApp') {
    ext.apl = true
}

project(':MyLibrary') {
    ext.apl = false
}

subprojects {
    if (project.apl) {
        apply plugin: 'android'
        dependencies {
            compile 'ch.acra:acra:4.5.0'
        }
    }
    if (project.scala) {
        apply plugin: 'android-scala'
        scala {
            target "jvm-1.7"
            addparams '-feature'
        }
    } else {
        apply plugin: 'android-library'
    }
    android {
        compileSdkVersion 17
        buildToolsVersion '19.1.0'

        signingConfigs { ... }
        defaultConfig {
            minSdkVersion 8
            targetSdkVersion 17
        }

        sourceSets {
            compileOptions {
                sourceCompatibility JavaVersion.VERSION_1_7
                targetCompatibility JavaVersion.VERSION_1_7
            }
        }

        buildTypes {
            debug {
                runProguard false
                proguardFile file('proguard-rules.txt')
                signingConfig signingConfigs.depurar
            }

            release {
                runProguard true
                proguardFile file('proguard-rules.txt')
                signingConfig signingConfigs.entregar
            }
        }
    }
}

project(':MyLibrary') {
    dependencies {
        compile "com.github.tony19:logback-android-core:1.1.1-2"
        compile "com.github.tony19:logback-android-classic:1.1.1-2"
        compile "org.slf4j:slf4j-api:1.7.6"

    }
}

project(':MyApp') {
    dependencies {
        compile 'com.android.support:appcompat-v7:19.1.0'
        compile('org.apache.httpcomponents:httpmime:4.1.1') {
            transitive = false
        }
        compile project(':Bibl')
    }
}

My settings.gradle is:

include 'MyLibrary', 'MyApp'

There is only one build.gradle.

The problem is that Gradle complains that

Plugin with id 'android-library' not found

whenever I try to use this plugin. With apply plugin: 'android' there is no problem.

The documentation states clearly that for libraries 'android-library' must be used. I'm using Gradle 1.10.

Is the doc outdated for newest versions of gradle-android-plugin like 1.2.1? Because the official doc is for version 0.9.

Answer 1

Is the doc outdated for newest versions of gradle-android-plugin like 1.2.1?

Quoting the documentation for gradle-android-plugin:

We are very sorry to announce that development of this plugin has been discontinued. Google has created their own Android development toolchain based on Gradle, which supercedes this plugin.

Please see http://tools.android.com/tech-docs/new-build-system/user-guide for further information.

I usually associate android-library with the official Gradle for Android plugin; I have no idea if the deprecated gradle-android-plugin supports it.