Fix publish-plugin configuration (#34)

- Fixed `publish-plugin` configuration. `group`/`version` had to be added to root `build.gradle` and this required some refactoring so that maven publishing configuration correctly references those fields from another build file.
- Replaced `jcenter()` documentation leftover with `mavenCentral()`

README.md

@@ -12,10 +12,10 @@ Apply the plugin in your `build.gradle`:
 ```groovy
 buildscript {
     repositories {
-        jcenter()
+        mavenCentral()
     }
     dependencies {
-        classpath 'com.vgaidarji:dependencies-overview:1.0.0'
+        classpath 'com.vgaidarji:dependencies-overview:<VERSION>'
     }
 }
 
@@ -145,8 +145,8 @@ following environment variables should be added to Circle CI project environment
 `publishToMavenLocal` task can be used to perform a dry run publishing to local maven repository.
 
 For automatic publishing from Sonatype Nexus staging repository to release https://github.com/gradle-nexus/publish-plugin/ plugin is used.
-`./gradlew clean build publishToSonatype closeSonatypeStagingRepository` command is used to upload signed plugin artifact to [Maven Central](https://search.maven.org/).
-Publishing may take some time, check https://oss.sonatype.org for new published version.
+`./gradlew clean build publishToSonatype closeAndReleaseSonatypeStagingRepository` command is used to upload signed plugin artifact to [Maven Central](https://search.maven.org/).
+Publishing may take some time, check https://oss.sonatype.org for newly published version.
 
 Developed By
 ------------

build.gradle

@@ -1,4 +1,4 @@
-apply plugin: 'io.github.gradle-nexus.publish-plugin'
+apply from: file('gradle/nexus-publishing.gradle')
 
 buildscript {
     ext.kotlin_version = '1.6.20'

gradle/maven-publishing.gradle

@@ -13,12 +13,11 @@ task sourcesJar(type: Jar) {
 }
 
 ext {
-    publishedGroupId = 'com.vgaidarji'
+    // some fields in nexus-publishing.gradle as required by publish-plugin
     libraryName = 'dependencies-overview'
     artifact = 'dependencies-overview'
     localVersionSuffix = 'local'
     // :bulb: keep sample-android-app/app/build.gradle in sync
-    libraryVersion = "1.0.1"
     libraryVersionString = Boolean.getBoolean("useLocalVersion") ? "$libraryVersion-$localVersionSuffix" : libraryVersion
     libraryDescription = 'Generates project dependencies overview report (JSON, Markdown, etc.) from project dependencies'
 
@@ -73,18 +72,6 @@ publishing {
     }
 }
 
-// io.github.gradle-nexus.publish-plugin
-nexusPublishing {
-    repositories {
-        sonatype {
-            // my acc is registered on https://oss.sonatype.org
-            // and for legacy accs repo url is not required by plugin
-            username = findProperty('SONATYPE_USERNAME')
-            password = findProperty('SONATYPE_PASSWORD')
-        }
-    }
-}
-
 signing {
     // do no require signing on Circle CI
     required { System.getenv("CIRCLECI") == "false" }

gradle/nexus-publishing.gradle

@@ -0,0 +1,20 @@
+apply plugin: 'io.github.gradle-nexus.publish-plugin'
+
+ext {
+    publishedGroupId = 'com.vgaidarji'
+    libraryVersion = '1.0.1'
+}
+
+group = publishedGroupId
+version = libraryVersion
+
+nexusPublishing {
+    repositories {
+        sonatype {
+            // my acc is registered on https://oss.sonatype.org
+            // and for legacy accs repo url is not required by plugin
+            username = findProperty('SONATYPE_USERNAME')
+            password = findProperty('SONATYPE_PASSWORD')
+        }
+    }
+}