Switch to gradle and AAR

This purposefully tries to limit the scope to just necessary changes. The android gradle plugin and build tools are updated, but the rest of the dependencies use the same as before. This configuration matches the ones used in sqldelight/rxbinding

.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..."
-  mvn clean source:jar javadoc:jar deploy --settings=".buildscript/settings.xml" -Dmaven.test.skip=true
+  ./gradlew clean uploadArchives
   echo "Snapshot deployed!"
 fi

.gitignore

@@ -29,3 +29,10 @@ gen-external-apklibs
 tmp
 
 .DS_Store
+
+# Gradle
+.gradle
+jniLibs
+build
+local.properties
+reports

.travis.yml

@@ -2,15 +2,18 @@ language: android
 
 android:
   components:
-    - build-tools-20.0.0
-    - android-17
-  licenses:
-    - android-sdk-license-5be876d5
+    - tools
+    - platform-tools
+    - build-tools-23.0.3
+    - extra-android-m2repository
+    - android-23
 
 jdk:
-  - oraclejdk7
   - oraclejdk8
 
+script:
+  - ./gradlew clean check
+
 after_success:
   - .buildscript/deploy_snapshot.sh
 
@@ -30,4 +33,4 @@ sudo: false
 
 cache:
   directories:
-    - $HOME/.m2
+    - $HOME/.gradle

RELEASING.md

@@ -0,0 +1,24 @@
+Releasing
+========
+
+ 1. Change the version in `gradle.properties` to a non-SNAPSHOT version.
+ 2. Update the `CHANGELOG.md` for the impending release.
+ 3. Update the `README.md` with the new version.
+ 4. `git commit -am "Prepare for release X.Y.Z."` (where X.Y.Z is the new version)
+ 5. `git tag -a X.Y.Z -m "Version X.Y.Z"` (where X.Y.Z is the new version)
+ 6. `./gradlew clean uploadArchives`
+ 7. Update the `gradle.properties` to the next SNAPSHOT version.
+ 8. `git commit -am "Prepare next development version."`
+ 9. `git push && git push --tags`
+ 10. Visit [Sonatype Nexus](https://oss.sonatype.org/) and promote the artifact.
+
+If step 6 or 7 fails, drop the Sonatype repo, fix the problem, commit, and start again at step 5.
+
+
+Prerequisites
+-------------
+
+In `~/.gradle/gradle.properties`, set the following:
+
+ * `SONATYPE_NEXUS_USERNAME` - Sonatype username for releasing to `com.squareup`.
+ * `SONATYPE_NEXUS_PASSWORD` - Sonatype password for releasing to `com.squareup`.

build.gradle

@@ -0,0 +1,31 @@
+subprojects {
+  buildscript {
+    repositories {
+      mavenCentral()
+    }
+  }
+  repositories {
+    mavenCentral()
+  }
+
+  plugins.apply('checkstyle')
+
+  task('checkstyle', type: Checkstyle) {
+    configFile rootProject.file('checkstyle.xml')
+    source 'src/main/java'
+    ignoreFailures false
+    showViolations true
+    include '**/*.java'
+
+    classpath = files()
+  }
+
+  group = GROUP
+  version = VERSION_NAME
+
+  afterEvaluate {
+    tasks.findByName('check').dependsOn('checkstyle')
+  }
+}
+
+apply from: rootProject.file('dependencies.gradle')

checkstyle.xml

@@ -27,7 +27,7 @@
   </module>
 
   <module name="TreeWalker">
-    <property name="cacheFile" value="${checkstyle.cache.file}"/>
+    <!--<property name="cacheFile" value="${checkstyle.cache.file}"/>-->
 
     <!-- Checks for Javadoc comments.                     -->
     <!-- See http://checkstyle.sf.net/config_javadoc.html -->

dependencies.gradle

@@ -0,0 +1,26 @@
+ext {
+  compileSdkVersion = 23
+  buildToolsVersion = '23.0.3'
+  minSdkVersion = 14
+  targetSdkVersion = 23
+  sourceCompatibilityVersion = JavaVersion.VERSION_1_7
+  targetCompatibilityVersion = JavaVersion.VERSION_1_7
+  okhttp3Version = '3.0.1'
+
+  dep = [
+          androidPlugin      : 'com.android.tools.build:gradle:2.1.2',
+          okhttp             : 'com.squareup.okhttp:okhttp:2.7.1',
+          okhttp3            : "com.squareup.okhttp3:okhttp:$okhttp3Version",
+          mockWebServer      : "com.squareup.okhttp3:mockwebserver:$okhttp3Version",
+          intellijAnnotations: 'com.intellij:annotations:12.0',
+          pollexor           : 'com.squareup:pollexor:2.0.0',
+          supportV4          : 'com.android.support:support-v4:23.4.0',
+          junit              : 'junit:junit:4.10',
+          fest               : 'org.easytesting:fest-assert-core:2.0M10',
+          festAndroid        : 'com.squareup:fest-android:1.0.6',
+          robolectric        : 'org.robolectric:robolectric:2.2',
+          mockito            : 'org.mockito:mockito-core:1.9.5'
+  ]
+
+  isCi = "true".equals(System.getenv('CI'))
+}

gradle.properties

@@ -0,0 +1,14 @@
+GROUP=com.squareup.picasso
+VERSION_NAME=2.6.0-SNAPSHOT
+
+POM_URL=https://github.com/square/picasso/
+POM_SCM_URL=https://github.com/square/picasso/
+POM_SCM_CONNECTION=scm:git:git://github.com/square/picasso.git
+POM_SCM_DEV_CONNECTION=scm:git:ssh://[email protected]/square/picasso.git
+
+POM_LICENCE_NAME=The Apache Software License, Version 2.0
+POM_LICENCE_URL=http://www.apache.org/licenses/LICENSE-2.0.txt
+POM_LICENCE_DIST=repo
+
+POM_DEVELOPER_ID=square
+POM_DEVELOPER_NAME=Square, Inc.

gradle/gradle-mvn-push.gradle

@@ -0,0 +1,218 @@
+/*
+ * Copyright 2013 Chris Banes
+ *
+ * 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
+ *
+ *     http://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.
+ */
+
+apply plugin: 'maven'
+apply plugin: 'signing'
+
+version = VERSION_NAME
+group = GROUP
+
+def isReleaseBuild() {
+  return VERSION_NAME.contains("SNAPSHOT") == false
+}
+
+def getReleaseRepositoryUrl() {
+  return hasProperty('RELEASE_REPOSITORY_URL') ? RELEASE_REPOSITORY_URL :
+      "https://oss.sonatype.org/service/local/staging/deploy/maven2/"
+}
+
+def getSnapshotRepositoryUrl() {
+  return hasProperty('SNAPSHOT_REPOSITORY_URL') ? SNAPSHOT_REPOSITORY_URL :
+      "https://oss.sonatype.org/content/repositories/snapshots/"
+}
+
+def getRepositoryUsername() {
+  return hasProperty('SONATYPE_NEXUS_USERNAME') ? SONATYPE_NEXUS_USERNAME : ""
+}
+
+def getRepositoryPassword() {
+  return hasProperty('SONATYPE_NEXUS_PASSWORD') ? SONATYPE_NEXUS_PASSWORD : ""
+}
+
+afterEvaluate { project ->
+  uploadArchives {
+    repositories {
+      mavenDeployer {
+        beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }
+
+        pom.groupId = GROUP
+        pom.artifactId = POM_ARTIFACT_ID
+        pom.version = VERSION_NAME
+
+        repository(url: getReleaseRepositoryUrl()) {
+          authentication(userName: getRepositoryUsername(), password: getRepositoryPassword())
+        }
+        snapshotRepository(url: getSnapshotRepositoryUrl()) {
+          authentication(userName: getRepositoryUsername(), password: getRepositoryPassword())
+        }
+
+        pom.project {
+          name POM_NAME
+          packaging POM_PACKAGING
+          description POM_DESCRIPTION
+          url POM_URL
+
+          scm {
+            url POM_SCM_URL
+            connection POM_SCM_CONNECTION
+            developerConnection POM_SCM_DEV_CONNECTION
+          }
+
+          licenses {
+            license {
+              name POM_LICENCE_NAME
+              url POM_LICENCE_URL
+              distribution POM_LICENCE_DIST
+            }
+          }
+
+          developers {
+            developer {
+              id POM_DEVELOPER_ID
+              name POM_DEVELOPER_NAME
+            }
+          }
+        }
+      }
+    }
+  }
+
+  signing {
+    required { isReleaseBuild() && gradle.taskGraph.hasTask("uploadArchives") }
+    sign configurations.archives
+  }
+
+  if (project.getPlugins().hasPlugin('com.android.application') ||
+      project.getPlugins().hasPlugin('com.android.library')) {
+    task install(type: Upload, dependsOn: assemble) {
+      repositories.mavenInstaller {
+        configuration = configurations.archives
+
+        pom.groupId = GROUP
+        pom.artifactId = POM_ARTIFACT_ID
+        pom.version = VERSION_NAME
+
+        pom.project {
+          name POM_NAME
+          packaging POM_PACKAGING
+          description POM_DESCRIPTION
+          url POM_URL
+
+          scm {
+            url POM_SCM_URL
+            connection POM_SCM_CONNECTION
+            developerConnection POM_SCM_DEV_CONNECTION
+          }
+
+          licenses {
+            license {
+              name POM_LICENCE_NAME
+              url POM_LICENCE_URL
+              distribution POM_LICENCE_DIST
+            }
+          }
+
+          developers {
+            developer {
+              id POM_DEVELOPER_ID
+              name POM_DEVELOPER_NAME
+            }
+          }
+        }
+      }
+    }
+
+    task androidJavadocs(type: Javadoc) {
+      source = android.sourceSets.main.java.source
+      classpath += project.files(android.getBootClasspath().join(File.pathSeparator))
+    }
+
+    task androidJavadocsJar(type: Jar, dependsOn: androidJavadocs) {
+      classifier = 'javadoc'
+      from androidJavadocs.destinationDir
+    }
+
+    task androidSourcesJar(type: Jar) {
+      classifier = 'sources'
+      from android.sourceSets.main.java.source
+    }
+  } else {
+    install {
+      repositories.mavenInstaller {
+        pom.groupId = GROUP
+        pom.artifactId = POM_ARTIFACT_ID
+        pom.version = VERSION_NAME
+
+        pom.project {
+          name POM_NAME
+          packaging POM_PACKAGING
+          description POM_DESCRIPTION
+          url POM_URL
+
+          scm {
+            url POM_SCM_URL
+            connection POM_SCM_CONNECTION
+            developerConnection POM_SCM_DEV_CONNECTION
+          }
+
+          licenses {
+            license {
+              name POM_LICENCE_NAME
+              url POM_LICENCE_URL
+              distribution POM_LICENCE_DIST
+            }
+          }
+
+          developers {
+            developer {
+              id POM_DEVELOPER_ID
+              name POM_DEVELOPER_NAME
+            }
+          }
+        }
+      }
+    }
+
+    task sourcesJar(type: Jar, dependsOn: classes) {
+      classifier = 'sources'
+      from sourceSets.main.allSource
+    }
+
+    task javadocJar(type: Jar, dependsOn: javadoc) {
+      classifier = 'javadoc'
+      from javadoc.destinationDir
+    }
+  }
+
+  if (JavaVersion.current().isJava8Compatible()) {
+    allprojects {
+      tasks.withType(Javadoc) {
+        options.addStringOption('Xdoclint:none', '-quiet')
+      }
+    }
+  }
+
+  artifacts {
+    if (project.getPlugins().hasPlugin('com.android.application') ||
+        project.getPlugins().hasPlugin('com.android.library')) {
+      archives androidSourcesJar
+      archives androidJavadocsJar
+    } else {
+      archives sourcesJar
+      archives javadocJar
+    }
+  }
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Tue Oct 20 20:22:56 EDT 2015
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.13-all.zip