build: add Gradle formatting rules

ING-4375

build.gradle

@@ -1,3 +1,11 @@
+plugins {
+  id 'hale.base'
+}
+
+repositories {
+  mavenCentral()
+}
+
 allprojects {
   group = 'eu.esdihumboldt.hale'
 }

buildSrc/build.gradle

@@ -1,13 +1,30 @@
 plugins {
   id 'groovy-gradle-plugin'
+
+  id("com.diffplug.spotless") version "6.25.0"
 }
 
 repositories {
   gradlePluginPortal() // so that external plugins can be resolved in dependencies section
+
+  mavenCentral()
 }
 
 dependencies {
   implementation 'to.wetransform:gradle-semantic-release-version:2.1.1'
   implementation 'biz.aQute.bnd:biz.aQute.bnd.gradle:6.3.0'
   implementation 'com.diffplug.spotless:spotless-plugin-gradle:6.25.0'
 }
+
+spotless {
+  // try to reflect .editorconfig settings for .gradle
+
+  groovyGradle {
+    target '*.gradle'
+
+    greclipse().configFile('../gradle-format.properties')
+
+    trimTrailingWhitespace()
+    endWithNewline()
+  }
+}

buildSrc/src/main/groovy/hale.base.gradle

@@ -0,0 +1,26 @@
+plugins {
+  id 'com.diffplug.spotless'
+}
+
+spotless {
+  // try to reflect .editorconfig settings
+
+  // generic steps described in https://github.com/diffplug/spotless/tree/main/plugin-gradle#generic-steps
+  // custom steps described in https://github.com/diffplug/spotless/tree/main/plugin-gradle#custom-steps
+
+  groovyGradle {
+    target '*.gradle'
+
+    greclipse().configFile(rootProject.file('gradle-format.properties'))
+
+    trimTrailingWhitespace()
+    endWithNewline()
+  }
+
+  format 'other', {
+    target '*.md', '.gitignore'
+
+    trimTrailingWhitespace()
+    endWithNewline()
+  }
+}

buildSrc/src/main/groovy/hale.common.gradle

@@ -1,5 +1,7 @@
 plugins {
   id 'to.wetransform.semantic-release-version'
+
+  id 'hale.base'
 }
 
 repositories {

gradle-format.properties

@@ -0,0 +1,34 @@
+#Whether to use 'space', 'tab' or 'mixed' (both) characters for indentation.
+#The default value is 'tab'.
+org.eclipse.jdt.core.formatter.tabulation.char=space
+
+#Number of spaces used for indentation in case 'space' characters
+#have been selected. The default value is 4.
+org.eclipse.jdt.core.formatter.tabulation.size=2
+
+#Number of spaces used for indentation in case 'mixed' characters
+#have been selected. The default value is 4.
+org.eclipse.jdt.core.formatter.indentation.size=2
+
+#Whether or not indentation characters are inserted into empty lines.
+#The default value is 'true'.
+org.eclipse.jdt.core.formatter.indent_empty_lines=false
+
+#Number of spaces used for multiline indentation.
+#The default value is 2.
+groovy.formatter.multiline.indentation=1
+
+#Length after which list are considered too long. These will be wrapped.
+#The default value is 30.
+groovy.formatter.longListLength=30
+
+#Whether opening braces position shall be the next line.
+#The default value is 'same'.
+groovy.formatter.braces.start=same
+
+#Whether closing braces position shall be the next line.
+#The default value is 'next'.
+groovy.formatter.braces.end=next
+
+#Remove unnecessary semicolons. The default value is 'false'.
+groovy.formatter.remove.unnecessary.semicolons=true

gradle.properties

@@ -1 +1 @@
-org.gradle.jvmargs=-Xmx1g
+org.gradle.jvmargs=-Xmx2g

settings.gradle

@@ -26,7 +26,9 @@ void includeProjects(relativeDirPath = null, filter = null) {
     def projectDirs = []
 
     dir.eachDir { subDir ->
-      searchDir(projectDirs, subDir, filter)
+      if (subDir.name != 'build') {
+        searchDir(projectDirs, subDir, filter)
+      }
     }
 
     projectDirs.each { File subdir ->

util/plugins/eu.esdihumboldt.util.orient.embedded.test/build.gradle

@@ -7,7 +7,10 @@ hale {
 }
 
 tasks.test {
-  jvmArgs = ['--add-exports', 'java.base/sun.nio.ch=ALL-UNNAMED']
+  jvmArgs = [
+    '--add-exports',
+    'java.base/sun.nio.ch=ALL-UNNAMED'
+  ]
 }
 
 dependencies {