Migrate Makefile targets to Gradle tasks

.travis.yml

@@ -25,7 +25,7 @@ cache:
   - ${HOME}/.m2
 
 script:
-- make test
+- ./gradlew preMerge
 
 after_success:
 - bash <(curl -s https://codecov.io/bash)

build.gradle.kts

@@ -5,3 +5,68 @@ subprojects {
         jcenter()
     }
 }
+
+val installVenv = tasks.register("installVenv", Exec::class.java) {
+    description = "Install a new virtualenv in ./venv"
+
+    outputs.dir("./venv")
+
+    commandLine("virtualenv", "venv")
+}
+
+val installPreCommit = tasks.register("installPreCommit", Exec::class.java) {
+    description = "Installs pre-commit in ./venv"
+
+    dependsOn(installVenv)
+
+    outputs.file("./venv/bin/pre-commit")
+
+    commandLine("./venv/bin/pip", "install", "pre-commit")
+}
+
+val installHooks = tasks.register("installHooks", Exec::class.java) {
+    description = "Run pre-commit hooks without installing them"
+
+    dependsOn(installPreCommit)
+
+    outputs.file(".git/hooks/pre-commit")
+    inputs.file(".pre-commit-config.yaml")
+
+    commandLine("./venv/bin/pre-commit", "install", "--install-hooks")
+}
+
+val runHooks = tasks.register("runHooks", Exec::class.java) {
+    description = "Run pre-commit hooks"
+
+    dependsOn(installPreCommit)
+
+    commandLine("./venv/bin/pre-commit", "run", "--all-files")
+}
+
+val preMerge = tasks.register("preMerge") {
+    description = "Runs pre-commit hooks, build the plugin and sample and execute tests."
+
+    dependsOn(runHooks)
+    dependsOn(gradle.includedBuild("gradle-plugin").task(":plugin:build"))
+    dependsOn(gradle.includedBuild("gradle-plugin").task(":plugin:check"))
+    dependsOn(subprojects.filter { it.name != "samples" }.map { it.tasks.named("assembleDebug") })
+    dependsOn(subprojects.filter { it.name != "samples" }.map { it.tasks.named("check") })
+}
+
+plugins {
+    id("com.android.library").version("3.5.3").apply(false)
+    id("com.yelp.codegen.plugin").version("1.3.0").apply(false)
+    id("io.gitlab.arturbosch.detekt").version("1.4.0").apply(false)
+    kotlin("android").version("1.3.61").apply(false)
+}
+
+subprojects {
+    afterEvaluate { // Remove when we have lazy configuration
+        tasks.all {
+            if (this is org.jetbrains.kotlin.gradle.tasks.KotlinCompile) {
+                // we need the generated files before we run the kotlin compile task
+                dependsOn(tasks.named("generateSwagger"))
+            }
+        }
+    }
+}

gradle.properties

@@ -0,0 +1,3 @@
+# The check task requires a lot of MetaSpace. Not sure if it is a leak or something else
+# But it is needed to make the tasks pass
+org.gradle.jvmargs=-Xmx4g -XX:MaxMetaspaceSize=2g

samples/groovy-android/build.gradle

@@ -1,22 +1,9 @@
-buildscript {
-    repositories {
-        gradlePluginPortal()
-        google()
-        mavenCentral()
-        jcenter()
-    }
-
-    dependencies {
-        classpath "com.android.tools.build:gradle:3.5.3"
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.61"
-        classpath "com.yelp.codegen:plugin:1.3.0"
-    }
+plugins {
+    id("com.android.library")
+    id("kotlin-android")
+    id("com.yelp.codegen.plugin")
 }
 
-apply plugin: "com.android.library"
-apply plugin: "kotlin-android"
-apply plugin: "com.yelp.codegen.plugin"
-
 android {
     compileSdkVersion = 28
     defaultConfig {

samples/junit-tests/build.gradle

@@ -1,25 +1,11 @@
-buildscript {
-    repositories {
-        gradlePluginPortal()
-        google()
-        mavenCentral()
-        jcenter()
-    }
-
-    dependencies {
-        classpath "com.android.tools.build:gradle:3.5.3"
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.61"
-        classpath "com.yelp.codegen:plugin:1.3.0"
-        classpath "io.gitlab.arturbosch.detekt:detekt-gradle-plugin:1.4.0"
-    }
+plugins {
+    id("com.android.library")
+    id("kotlin-android")
+    id("com.yelp.codegen.plugin")
+    id("io.gitlab.arturbosch.detekt")
+    id("kotlin-kapt")
 }
 
-apply plugin: "com.android.library"
-apply plugin: "kotlin-android"
-apply plugin: "com.yelp.codegen.plugin"
-apply plugin: "io.gitlab.arturbosch.detekt"
-apply plugin: "kotlin-kapt"
-
 android {
     compileSdkVersion = 28
     defaultConfig {

samples/kotlin-android-moshi-codegen/build.gradle.kts

@@ -1,8 +1,8 @@
 plugins {
-    id("com.android.library") version "3.5.3"
-    kotlin("android") version "1.3.61"
-    id("com.yelp.codegen.plugin") version "1.3.0"
-    kotlin("kapt") version "1.3.61"
+    id("com.android.library")
+    id("kotlin-android")
+    id("com.yelp.codegen.plugin")
+    id("kotlin-kapt")
 }
 
 android {

samples/kotlin-android/build.gradle.kts

@@ -1,7 +1,7 @@
 plugins {
-    id("com.android.library") version "3.5.3"
-    kotlin("android") version "1.3.61"
-    id("com.yelp.codegen.plugin") version "1.3.0"
+    id("com.android.library")
+    kotlin("android")
+    id("com.yelp.codegen.plugin")
 }
 
 android {

samples/kotlin-coroutines/build.gradle

@@ -1,22 +1,9 @@
-buildscript {
-    repositories {
-        gradlePluginPortal()
-        google()
-        mavenCentral()
-        jcenter()
-    }
-
-    dependencies {
-        classpath "com.android.tools.build:gradle:3.5.3"
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.61"
-        classpath "com.yelp.codegen:plugin:1.3.0"
-    }
+plugins {
+    id("com.android.library")
+    id("kotlin-android")
+    id("com.yelp.codegen.plugin")
 }
 
-apply plugin: "com.android.library"
-apply plugin: "kotlin-android"
-apply plugin: "com.yelp.codegen.plugin"
-
 android {
     compileSdkVersion = 28
     defaultConfig {

settings.gradle.kts

@@ -7,6 +7,7 @@ pluginManagement {
         jcenter()
         google()
     }
+
     resolutionStrategy {
         eachPlugin {
             if ("com.android" in requested.id.id) {