Remove the need to generate Constants.java, can grab the project version from the java class itself

Author: stanley-cheung

.gitignore

@@ -26,6 +26,3 @@ bin/
 ## VSCode
 .vscode/
 .devcontainer/
-
-## build generated file
-grpc-common-spring-boot/src/main/java/net/devh/boot/grpc/common/util/Constants.java

build.gradle

@@ -72,19 +72,6 @@ ext {
     buildRevision = versioning.info.commit
 }
 
-task createConstantsFile(type: Copy) {
-    from("grpc-common-spring-boot/src/main/java/net/devh/boot/grpc/common/util/Constants.java.template") {
-        rename "Constants.java.template", "Constants.java"
-        filter(org.apache.tools.ant.filters.ReplaceTokens, tokens: [
-            versionStringPlaceholder: "v${projectVersion}".toString(),
-        ])
-    }
-    into "grpc-common-spring-boot/src/main/java/net/devh/boot/grpc/common/util"
-}
-clean.doFirst {
-    delete "grpc-common-spring-boot/src/main/java/net/devh/boot/grpc/common/util/Constants.java"
-}
-
 allprojects {
     apply plugin: 'java'
     apply plugin: 'idea'
@@ -147,12 +134,8 @@ allprojects {
             include 'LICENSE'
             into 'META-INF'
         }
-        dependsOn createConstantsFile
     }
 
-    compileJava.dependsOn createConstantsFile
-    spotlessJava.dependsOn createConstantsFile
-
     // Generate MANIFEST.MF
     jar {
         manifest {
@@ -241,10 +224,6 @@ allprojects { project ->
             }
         }
 
-        delombok {
-            dependsOn createConstantsFile
-        }
-
         // Javadoc Task
         javadoc {
             dependsOn delombok

grpc-common-spring-boot/src/main/java/net/devh/boot/grpc/common/util/Constants.java.template renamed to grpc-common-spring-boot/src/main/java/net/devh/boot/grpc/common/util/Constants.java

@@ -24,7 +24,7 @@ public final class Constants {
     /**
      * A constant that defines the current version of the library.
      */
-    public static final String VERSION = "@versionStringPlaceholder@";
+    public static final String VERSION = Constants.class.getPackage().getImplementationVersion();
 
 
     /**