Fix pom file (#517)

build.gradle

@@ -5,8 +5,8 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.4.1'
-        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
+        classpath 'com.android.tools.build:gradle:3.4.2'
+        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'
     }
 }

cameraview/build.gradle

@@ -56,35 +56,51 @@ dependencies {
 
 //region bintray
 
+// install is a task defined by the Gradle Maven plugin, which is used to
+// publish a maven repo to a local repository. (we actually use the android version of the plugin,
+// com.github.dcendents.android-maven, to support AARs)
+// https://docs.gradle.org/current/userguide/maven_plugin.html#sec:maven_tasks
 install {
-    repositories.mavenInstaller {
-        pom.project {
-            name 'CameraView'
-            description 'A well documented, high-level Android interface that makes capturing pictures ' +
-                    'and videos easy, addressing most of the common issues and needs.'
-            url 'https://github.com/natario1/CameraView'
-
-            packaging 'aar'
-            groupId project.group
-            artifactId 'cameraview'
-            version project.version
-
-            licenses {
-                license {
-                    name 'The Apache Software License, Version 2.0'
-                    url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
-                }
-            }
-            scm {
-                connection 'https://github.com/natario1/CameraView.git'
-                developerConnection 'https://github.com/natario1/CameraView.git'
-                url 'https://github.com/natario1/CameraView'
-
-            }
-            developers {
-                developer {
-                    id = 'natario'
-                    name 'Natario'
+    // The repositories property is common to all tasks of type Upload and returns the repositories
+    // into which we will upload data. https://docs.gradle.org/current/dsl/org.gradle.api.tasks.Upload.html#org.gradle.api.tasks.Upload:repositories
+    // It returns a RepositoryHandler: https://docs.gradle.org/current/dsl/org.gradle.api.artifacts.dsl.RepositoryHandler.html
+    repositories {
+        // The maven plugin adds a mavenInstaller property to the RepositoryHandler which can be used to
+        // add and configure a local maven repository cache.
+        // https://docs.gradle.org/current/dsl/org.gradle.api.artifacts.dsl.RepositoryHandler.html#N11785
+        mavenInstaller {
+            // The object here extends PomFilterContainer so we can configure the pom file here.
+            // https://docs.gradle.org/current/javadoc/org/gradle/api/artifacts/maven/PomFilterContainer.html#pom-groovy.lang.Closure-
+            pom {
+                // Now we are inside a MavenPom object that can be configured. We get the project and configure.
+                // https://docs.gradle.org/current/javadoc/org/gradle/api/artifacts/maven/MavenPom.html
+                project {
+                    name 'CameraView'
+                    description 'A well documented, high-level Android interface that makes capturing pictures ' +
+                            'and videos easy, addressing most of the common issues and needs.'
+                    url 'https://github.com/natario1/CameraView'
+                    packaging 'aar'
+                    groupId project.group
+                    artifactId 'cameraview'
+                    version project.version
+                    licenses {
+                        license {
+                            name 'The Apache Software License, Version 2.0'
+                            url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
+                        }
+                    }
+                    scm {
+                        connection 'https://github.com/natario1/CameraView.git'
+                        developerConnection 'https://github.com/natario1/CameraView.git'
+                        url 'https://github.com/natario1/CameraView'
+
+                    }
+                    developers {
+                        developer {
+                            id = 'natario'
+                            name 'Mattia Iavarone'
+                        }
+                    }
                 }
             }
         }