Adds Support For Generating Maven Package For Android Library (#58)

* Adds Support For Generating Maven Package For Android Library

Summary:
This adds support for generating the maven package similar to how
React Native core does it.
This allows a brownfield Android project reference this maven package
instead of the project in the node_modules.

* Adds config options for author's github, name and email.
Updates README

* added default values to readme

* fixed merge conflict

* Makes the library license type command line configurable

* Changes authorGithub to githubAccount

Author: thorbenprimke

README.md

@@ -47,6 +47,10 @@ Options:
   --namespace <namespace>                   (Windows only!) The namespace for the Windows module
    (Default: The name as PascalCase)
   --platforms <platforms>                   Platforms the library will be created for. (comma separated; default: `ios,android,windows`)
+  --github-account <github_account>         The github account where the library is hosted (Default: `github_account`)
+  --author-name <name>                      The author's name (Default: `Your Name`)
+  --author-email <email>                    The author's email (Default: `yourname@email.com`)
+  --license <license>                       The license type of this library (Default: `Apache-2.0`)
 ```
 
 ## Programmatic usage
@@ -69,6 +73,10 @@ createLibrary({
   platforms: Array, /* Platforms the library will be created for. (Default: ['ios', 'android', 'windows']) */
   packageIdentifier: String, /* (Android only!) The package name for the Android module (Default: com.reactlibrary) */
   namespace: String, /* (Windows only!) The namespace for the Windows module (Default: The package identifier as PascalCase, which is `Com.Reactlibrary`) */
+  githubAccount: String, /* The github account where the library is hosted (Default: `github_account`) */
+  authorName: String, /* The author's name (Default: `Your Name`) */
+  authorEmail: String, /* The author's email (Default: `yourname@email.com`) */ 
+  license: String, /* The license type of this library (Default: `Apache-2.0`) */
 }
 ```
 

command.js

@@ -14,6 +14,10 @@ module.exports = {
     const namespace = options.namespace;
     const platforms = (options.platforms) ? options.platforms.split(',') : options.platforms;
     const overridePrefix = options.overridePrefix;
+    const githubAccount = options.githubAccount;
+    const authorName = options.authorName;
+    const authorEmail = options.authorEmail;
+    const license = options.license;
 
     const beforeCreation = Date.now();
     createLibrary({
@@ -24,6 +28,10 @@ module.exports = {
       platforms,
       namespace,
       overridePrefix,
+      githubAccount,
+      authorName,
+      authorEmail,
+      license
     }).then(() => {
       console.log(`
 ${emoji.get('books')}  Created library ${name} in \`./${name}\`.
@@ -60,5 +68,21 @@ ${emoji.get('arrow_right')}  To get started type \`cd ./${name}\` and run \`npm
     command: '--platforms <platforms>',
     description: 'Platforms the library will be created for. (comma separated; default: `ios,android,windows`)',
     default: 'ios,android,windows',
+  }, {
+    command: '--github-account [githubAccount]',
+    description: 'The github account where the library is hosted (Default: `github_account`)',
+    default: 'github_account',    
+  }, {
+    command: '--author-name [authorName]',
+    description: 'The author\'s name (Default: `Your Name`)',
+    default: 'Your Name',    
+  }, {
+    command: '--author-email [authorEmail]',
+    description: 'The author\'s email (Default: `yourname@email.com`)',
+    default: 'yourname@email.com',    
+  }, {
+    command: '--license [license]',
+    description: 'The license type (Default: `Apache-2.0`)',
+    default: 'Apache-2.0',    
   }]
 };

lib.js

@@ -12,6 +12,10 @@ const DEFAULT_MODULE_PREFIX = 'react-native';
 const DEFAULT_PACKAGE_IDENTIFIER = 'com.reactlibrary';
 const DEFAULT_PLATFORMS = ['android', 'ios', 'windows'];
 const DEFAULT_OVERRIDE_PREFIX = false;
+const DEFAULT_GITHUB_ACCOUNT = 'github_account'
+const DEFAULT_AUTHOR_NAME = 'Your Name'
+const DEFAULT_AUTHOR_EMAIL = 'yourname@email.com'
+const DEFAULT_LICENSE = 'Apache-2.0'
 
 module.exports = ({
   namespace,
@@ -21,6 +25,10 @@ module.exports = ({
   packageIdentifier = DEFAULT_PACKAGE_IDENTIFIER,
   platforms = DEFAULT_PLATFORMS,
   overridePrefix = DEFAULT_OVERRIDE_PREFIX,
+  githubAccount = DEFAULT_GITHUB_ACCOUNT,
+  authorName = DEFAULT_AUTHOR_NAME,
+  authorEmail = DEFAULT_AUTHOR_EMAIL,
+  license = DEFAULT_LICENSE,
 }) => {
   if (!overridePrefix) {
     if (hasPrefix(name)) {
@@ -64,6 +72,10 @@ module.exports = ({
       packageIdentifier,
       namespace: namespace || pascalCase(name).split(/(?=[A-Z])/).join('.'),
       platforms,
+      githubAccount,
+      authorName,
+      authorEmail,
+      license,
     };
 
     const filename = path.join(name, template.name(args));

templates/android.js

@@ -1,6 +1,6 @@
 module.exports = platform => [{
   name: () => `${platform}/build.gradle`,
-  content: () => `
+  content: ({ packageIdentifier }) => `
 buildscript {
     repositories {
         jcenter()
@@ -14,6 +14,7 @@ buildscript {
 }
 
 apply plugin: 'com.android.library'
+apply plugin: 'maven'
 
 android {
     compileSdkVersion 23
@@ -43,6 +44,77 @@ repositories {
 dependencies {
     compile 'com.facebook.react:react-native:+'
 }
+
+def configureReactNativePom(def pom) {
+    def packageJson = new groovy.json.JsonSlurper().parseText(file('../package.json').text)
+
+    pom.project {
+        name packageJson.title
+        artifactId packageJson.name
+        version = packageJson.version
+        group = "${packageIdentifier}"
+        description packageJson.description
+        url packageJson.repository.baseUrl
+
+        licenses {
+            license {
+                name packageJson.license
+                url packageJson.repository.baseUrl + '/blob/master/' + packageJson.licenseFilename
+                distribution 'repo'
+            }
+        }
+
+        developers {
+            developer {
+                id packageJson.author.username
+                name packageJson.author.name
+            }
+        }
+    }
+}
+
+afterEvaluate { project ->
+
+    task androidJavadoc(type: Javadoc) {
+        source = android.sourceSets.main.java.srcDirs
+        classpath += files(android.bootClasspath)
+        classpath += files(project.getConfigurations().getByName('compile').asList())
+        include '**/*.java'
+    }
+
+    task androidJavadocJar(type: Jar, dependsOn: androidJavadoc) {
+        classifier = 'javadoc'
+        from androidJavadoc.destinationDir
+    }
+
+    task androidSourcesJar(type: Jar) {
+        classifier = 'sources'
+        from android.sourceSets.main.java.srcDirs
+        include '**/*.java'
+    }
+
+    android.libraryVariants.all { variant ->
+        def name = variant.name.capitalize()
+        task "jar$\{name\}"(type: Jar, dependsOn: variant.javaCompile) {
+            from variant.javaCompile.destinationDir
+        }
+    }
+
+    artifacts {
+        archives androidSourcesJar
+        archives androidJavadocJar
+    }
+
+    task installArchives(type: Upload) {
+        configuration = configurations.archives
+        repositories.mavenDeployer {
+            // Deploy to react-native-event-bridge/maven, ready to publish to npm
+            repository url: "file://$\{projectDir\}/../android/maven"
+
+            configureReactNativePom pom
+        }
+    }
+}
   `,
 }, {
   name: () => `${platform}/src/main/AndroidManifest.xml`,
@@ -108,4 +180,21 @@ public class ${name}Package implements ReactPackage {
       return Collections.emptyList();
     }
 }`,
-}];
+}, {
+  name: () => `${platform}/README.md`,
+  content: () => `
+README
+======
+
+If you want to publish the lib as a maven dependency, follow these steps before publishing a new version to npm:
+
+1. Be sure to have the Android [SDK](https://developer.android.com/studio/index.html) and [NDK](https://developer.android.com/ndk/guides/index.html) installed
+2. Be sure to have a \`local.properties\` file in this folder that points to the Android SDK and NDK
+\`\`\`
+ndk.dir=/Users/{username}/Library/Android/sdk/ndk-bundle
+sdk.dir=/Users/{username}/Library/Android/sdk
+\`\`\`
+3. Delete the \`maven\` folder
+4. Run \`sudo ./gradlew installArchives\`
+5. Verify that latest set of generated files is in the maven folder with the correct version number
+`}];

templates/general.js

@@ -73,7 +73,7 @@ ${name};
   },
 }, {
   name: () => 'package.json',
-  content: ({ moduleName, platforms }) => {
+  content: ({ moduleName, platforms, githubAccount, authorName, authorEmail, license }) => {
     let dependencies = `
     "react": "16.0.0-alpha.6",
     "react-native": "^0.44.1"`;
@@ -85,17 +85,28 @@ ${name};
     return `
 {
   "name": "${moduleName}",
+  "title": "${moduleName.split('-').map(word => word[0].toUpperCase() + word.substr(1)).join(' ')}",
   "version": "1.0.0",
   "description": "",
   "main": "index.js",
   "scripts": {
     "test": "echo \\"Error: no test specified\\" && exit 1"
   },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/${githubAccount}/${moduleName}.git",
+    "baseUrl": "https://github.com/${githubAccount}/${moduleName}"
+  },
   "keywords": [
     "react-native"
   ],
-  "author": "",
-  "license": "",
+  "author": {
+    "name": "${authorName}",
+    "email": "${authorEmail}"
+  },
+  "license": "${license}",
+  "licenseFilename": "LICENSE",
+  "readmeFilename": "README.md",
   "peerDependencies": {
     ${dependencies}
   },