🔧 Add publishing to maven central

.gitignore

@@ -3,4 +3,7 @@
 out/
 
 # Gradle
-.gradle/
+.gradle/
+
+# Publishing
+local.properties

build.gradle

@@ -1,5 +1,6 @@
 plugins {
-    id 'java'
+    id "java"
+    id("io.github.gradle-nexus.publish-plugin") version "1.1.0"
 }
 
 group "com.giannivanhoecke.oauth"
@@ -14,7 +15,6 @@ repositories {
 }
 
 dependencies {
-
     implementation "org.apache.commons:commons-lang3:${commonsLang3Version}"
     implementation "commons-codec:commons-codec:${commonsCodecVersion}"
     implementation "com.google.code.gson:gson:${gsonVersion}"
@@ -28,4 +28,13 @@ dependencies {
 
 test {
     useJUnitPlatform()
-}
+}
+
+ext {
+    PUBLISH_GROUP_ID = "com.giannivanhoecke.oauth"
+    PUBLISH_ARTIFACT_ID = "oauth-desktop"
+    PUBLISH_VERSION = "${version}"
+}
+
+apply from: "${rootDir}/gradle/publish-root.gradle"
+apply from: "${rootProject.projectDir}/gradle/publish-module.gradle"

gradle/publish-module.gradle

@@ -0,0 +1,73 @@
+apply plugin: 'maven-publish'
+apply plugin: 'signing'
+
+task javadocJar(type: Jar) {
+    archiveClassifier.set('javadoc')
+    from javadoc
+}
+
+task sourcesJar(type: Jar) {
+    archiveClassifier.set('sources')
+    from sourceSets.main.allSource
+}
+
+artifacts {
+    archives javadocJar, sourcesJar
+}
+
+group = PUBLISH_GROUP_ID
+version = PUBLISH_VERSION
+
+afterEvaluate {
+    publishing {
+        publications {
+            release(MavenPublication) {
+                groupId PUBLISH_GROUP_ID
+                artifactId PUBLISH_ARTIFACT_ID
+                version PUBLISH_VERSION
+
+                if (project.plugins.findPlugin("com.android.library")) {
+                    from components.release
+                } else {
+                    from components.java
+                }
+
+                artifact sourcesJar
+                artifact javadocJar
+
+                pom {
+                    name = PUBLISH_ARTIFACT_ID
+                    description = 'Open source OAuth2 desktop library for Java'
+                    url = 'https://github.com/giannivh/oauth-desktop'
+                    licenses {
+                        license {
+                            name = 'MIT License'
+                            url = 'https://github.com/giannivh/oauth-desktop/blob/master/LICENSE'
+                        }
+                    }
+                    developers {
+                        developer {
+                            id = 'gvhoecke'
+                            name = 'Gianni Van Hoecke'
+                            email = '[email protected]'
+                        }
+                    }
+                    scm {
+                        connection = 'scm:git:github.com/giannivh/oauth-desktop.git'
+                        developerConnection = 'scm:git:ssh://github.com/giannivh/oauth-desktop.git'
+                        url = 'https://github.com/giannivh/oauth-desktop/tree/master'
+                    }
+                }
+            }
+        }
+    }
+}
+
+signing {
+    useInMemoryPgpKeys(
+            rootProject.ext["signing.keyId"],
+            rootProject.ext["signing.key"],
+            rootProject.ext["signing.password"],
+    )
+    sign publishing.publications
+}

gradle/publish-root.gradle

@@ -0,0 +1,36 @@
+// create variables with empty default values
+ext["signing.keyId"] = ''
+ext["signing.password"] = ''
+ext["signing.key"] = ''
+ext["ossrhUsername"] = ''
+ext["ossrhPassword"] = ''
+ext["sonatypeStagingProfileId"] = ''
+
+File secretPropsFile = project.rootProject.file('local.properties')
+if (secretPropsFile.exists()) {
+    // read local.properties file first if it exists
+    Properties p = new Properties()
+    new FileInputStream(secretPropsFile).withCloseable { is -> p.load(is) }
+    p.each { name, value -> ext[name] = value }
+} else {
+    // use system environment variables
+    ext["signing.keyId"] = System.getenv('SIGNING_KEY_ID')
+    ext["signing.password"] = System.getenv('SIGNING_PASSWORD')
+    ext["signing.key"] = System.getenv('SIGNING_KEY')
+    ext["ossrhUsername"] = System.getenv('OSSRH_USERNAME')
+    ext["ossrhPassword"] = System.getenv('OSSRH_PASSWORD')
+    ext["sonatypeStagingProfileId"] = System.getenv('SONATYPE_STAGING_PROFILE_ID')
+}
+
+// set up Sonatype repository
+nexusPublishing {
+    repositories {
+        sonatype {
+            stagingProfileId = sonatypeStagingProfileId
+            username = ossrhUsername
+            password = ossrhPassword
+            nexusUrl.set(uri("https://s01.oss.sonatype.org/service/local/"))
+            snapshotRepositoryUrl.set(uri("https://s01.oss.sonatype.org/content/repositories/snapshots/"))
+        }
+    }
+}