Migrate to Gradle (#1159)

* Start gradle root

* Clean up test API ambiguities

These don't compile in gradle anymore and the team[] warns

* Exclude .gradle dirs in git

* Set up moshi module

* Set up moshi-adapters

* Add repositories to subprojects

* Set target/source compatibility

* Set up examples

* Fix location of reflect/test dir

* Set up moshi-kotlin

* Set up code gen

* Opportunistic update code gen deps

* Fix up with code gen

* Set up kotlin tests

* Update snapshots

* Update travis build

* Configure checkstyle

* Cache gradle

* Finish fixing up checkstyle

* Now disable checkstyle until we can fix them all :|

* Update contributing

* Fix tests in codegen

* Remove unnecessary annotation

* Remove maven stuff!

* Suppress warning

* Remove jcenter

* Consolidate dependencies

* Revert "Clean up test API ambiguities"

This reverts commit 3ead69b.

* Fix incap dep

* Opportunistically fix some small kotlinpoet deprecations

* Automatically apply the stdlib to all kotlin projects

* Opportunistic move to opt-in and remove unnecessary annotations

The kotlin maven plugin didn't handle these well in the IDE, gradle does

* Fix Type doc warning

* Fix okio version

* Fix dokka support

* Fix copypasta

* Use new snapshot

* Kotlin 1.4.0

.buildscript/deploy_snapshot.sh

@@ -21,6 +21,6 @@ elif [ "$TRAVIS_BRANCH" != "$BRANCH" ]; then
   echo "Skipping snapshot deployment: wrong branch. Expected '$BRANCH' but was '$TRAVIS_BRANCH'."
 else
   echo "Deploying snapshot..."
-  ./mvnw clean source:jar javadoc:jar deploy --settings=".buildscript/settings.xml" -Dmaven.test.skip=true
+  ./gradlew uploadArchives
   echo "Snapshot deployed!"
 fi

.gitignore

@@ -23,3 +23,5 @@ classes
 obj
 
 .DS_Store
+
+.gradle

.travis.yml

@@ -3,6 +3,9 @@ language: java
 jdk:
   - openjdk8
 
+script:
+  - ./gradlew build check
+
 after_success:
   - .buildscript/deploy_snapshot.sh
 
@@ -18,6 +21,11 @@ branches:
 notifications:
   email: false
 
+before_cache:
+  - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock
+  - rm -fr $HOME/.gradle/caches/*/plugin-resolution/
+
 cache:
   directories:
-    - $HOME/.m2
+    - $HOME/.gradle/caches/
+    - $HOME/.gradle/wrapper/

CONTRIBUTING.md

@@ -6,9 +6,9 @@ forking the repository and sending a pull request.
 
 When submitting code, please make every effort to follow existing conventions
 and style in order to keep the code as readable as possible. Please also make
-sure your code compiles by running `./mvnw clean verify`. Checkstyle failures
+sure your code compiles by running `./gradlew check`. Checkstyle failures
 during compilation indicate errors in your style and can be viewed in the
-`checkstyle-result.xml` file.
+failing project's `build/reports/checkstyle` directory.
 
 Before your code can be accepted into the project you must also sign the
 [Individual Contributor License Agreement (CLA)][1].

adapters/build.gradle.kts

@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2020 Square, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+plugins {
+  `java-library`
+  id("com.vanniktech.maven.publish")
+}
+
+dependencies {
+  compileOnly(Dependencies.jsr305)
+  api(project(":moshi"))
+
+  testCompileOnly(Dependencies.jsr305)
+  testImplementation(Dependencies.Testing.junit)
+  testImplementation(Dependencies.Testing.assertj)
+}

adapters/gradle.properties

@@ -0,0 +1,20 @@
+#
+# Copyright (C) 2020 Square, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+POM_NAME=Moshi Adapters
+POM_ARTIFACT_ID=moshi-adapters
+POM_PACKAGING=jar
+AUTOMATIC_MODULE_NAME=com.squareup.moshi.adapters

build.gradle.kts

@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2020 Square, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import com.vanniktech.maven.publish.MavenPublishPluginExtension
+import org.gradle.jvm.tasks.Jar
+
+buildscript {
+  dependencies {
+    classpath(kotlin("gradle-plugin", version = Dependencies.Kotlin.version))
+  }
+}
+
+plugins {
+  id("com.vanniktech.maven.publish") version "0.11.1" apply false
+  id("org.jetbrains.dokka") version "0.10.1" apply false
+}
+
+subprojects {
+  repositories {
+    mavenCentral()
+    @Suppress("UnstableApiUsage")
+    exclusiveContent {
+      forRepository {
+        maven {
+          name = "JCenter"
+          setUrl("https://jcenter.bintray.com/")
+        }
+      }
+      filter {
+        includeModule("org.jetbrains.dokka", "dokka-fatjar")
+      }
+    }
+  }
+
+//  apply(plugin = "checkstyle")
+//  configure<CheckstyleExtension> {
+//    toolVersion = "8.28"
+//    configFile = rootProject.file("checkstyle.xml")
+//  }
+//  tasks.withType<Checkstyle>().configureEach {
+//    exclude("**/Iso8601Utils.java")
+//  }
+
+  pluginManager.withPlugin("java-library") {
+    configure<JavaPluginExtension> {
+      sourceCompatibility = JavaVersion.VERSION_1_7
+      targetCompatibility = JavaVersion.VERSION_1_7
+    }
+  }
+
+  // Configure publishing
+  pluginManager.withPlugin("com.vanniktech.maven.publish") {
+    configure<MavenPublishPluginExtension> {
+      useLegacyMode = false
+      nexus {
+        groupId = "com.squareup"
+      }
+    }
+
+    // Configure automatic-module-name, but only for published modules
+    @Suppress("UnstableApiUsage")
+    val automaticModuleName = providers.gradleProperty("AUTOMATIC_MODULE_NAME")
+        .forUseAtConfigurationTime()
+    if (automaticModuleName.isPresent) {
+      val name = automaticModuleName.get()
+      tasks.withType<Jar>().configureEach {
+        manifest {
+          attributes("Automatic-Module-Name" to name)
+        }
+      }
+    }
+  }
+
+  pluginManager.withPlugin("org.jetbrains.kotlin.jvm") {
+    dependencies.add("api", Dependencies.Kotlin.stdlib)
+  }
+}

buildSrc/build.gradle.kts

@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2020 Square, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+plugins {
+  `kotlin-dsl`
+}
+
+repositories {
+  mavenCentral()
+}