build: pull build scripts from shared repo

build.gradle

@@ -4,7 +4,8 @@ plugins {
     id "idea"
     id "jacoco"
     id "com.github.johnrengelman.shadow" version "5.1.0"
-    id "com.diffplug.gradle.spotless" version "3.24.3"
+    id "com.diffplug.gradle.spotless" version "3.25.0"
+    id "de.undercouch.download" version "4.0.0"
 }
 
 description 'web3j command line tools'
@@ -27,7 +28,7 @@ apply {
         'javadoc',
         'repositories',
         'spotless'
-    ].each {
+    ].each { buildScript ->
         download {
             src "https://raw.githubusercontent.com/web3j/build-tools/master/gradle/$buildScript/build.gradle"
             dest "$rootDir/gradle/$buildScript/build.gradle"

gradle/spotless/build.gradle

@@ -1,5 +1,20 @@
 
 apply plugin: 'com.diffplug.gradle.spotless'
+apply plugin: "de.undercouch.download"
+
+task downloadJavaLicense(type: Download) {
+    src 'https://raw.githubusercontent.com/web3j/build-tools/master/gradle/spotless/java.license'
+    dest new File("$rootDir/gradle/spotless",'java.license')
+    quiet true
+    onlyIfModified true
+}
+
+task downloadFormatterProperties(type: Download) {
+    src 'https://raw.githubusercontent.com/web3j/build-tools/master/gradle/spotless/formatter.properties'
+    dest new File("$rootDir/gradle/spotless",'formatter.properties')
+    quiet true
+    onlyIfModified true
+}
 
 spotless {
     java {
@@ -35,3 +50,5 @@ spotless {
         paddedCell()
     }
 }
+
+ spotlessCheck.dependsOn('downloadJavaLicense', 'downloadFormatterProperties')