Merge branch 'kotlin-support' into 'main'

Add support for Kotlin in build.gradle

See merge request ExplorViz/code/span-service!25

Author: malte-hansen

.editorconfig

@@ -273,6 +273,93 @@ ij_java_wrap_comments = true
 ij_java_wrap_first_method_in_call_chain = false
 ij_java_wrap_long_lines = false
 
+[{*.kt,*.kts}]
+indent_style = space
+insert_final_newline = true
+max_line_length = 120
+indent_size = 4
+ij_continuation_indent_size = 4
+ij_java_names_count_to_use_import_on_demand = 9999
+ij_kotlin_align_in_columns_case_branch = false
+ij_kotlin_align_multiline_binary_operation = false
+ij_kotlin_align_multiline_extends_list = false
+ij_kotlin_align_multiline_method_parentheses = false
+ij_kotlin_align_multiline_parameters = true
+ij_kotlin_align_multiline_parameters_in_calls = false
+ij_kotlin_allow_trailing_comma = true
+ij_kotlin_allow_trailing_comma_on_call_site = true
+ij_kotlin_assignment_wrap = normal
+ij_kotlin_blank_lines_after_class_header = 0
+ij_kotlin_blank_lines_around_block_when_branches = 0
+ij_kotlin_blank_lines_before_declaration_with_comment_or_annotation_on_separate_line = 1
+ij_kotlin_block_comment_at_first_column = true
+ij_kotlin_call_parameters_new_line_after_left_paren = true
+ij_kotlin_call_parameters_right_paren_on_new_line = false
+ij_kotlin_call_parameters_wrap = on_every_item
+ij_kotlin_catch_on_new_line = false
+ij_kotlin_class_annotation_wrap = split_into_lines
+ij_kotlin_code_style_defaults = KOTLIN_OFFICIAL
+ij_kotlin_continuation_indent_for_chained_calls = true
+ij_kotlin_continuation_indent_for_expression_bodies = true
+ij_kotlin_continuation_indent_in_argument_lists = true
+ij_kotlin_continuation_indent_in_elvis = false
+ij_kotlin_continuation_indent_in_if_conditions = false
+ij_kotlin_continuation_indent_in_parameter_lists = false
+ij_kotlin_continuation_indent_in_supertype_lists = false
+ij_kotlin_else_on_new_line = false
+ij_kotlin_enum_constants_wrap = off
+ij_kotlin_extends_list_wrap = normal
+ij_kotlin_field_annotation_wrap = off
+ij_kotlin_finally_on_new_line = false
+ij_kotlin_if_rparen_on_new_line = false
+ij_kotlin_import_nested_classes = false
+ij_kotlin_imports_layout = *
+ij_kotlin_insert_whitespaces_in_simple_one_line_method = true
+ij_kotlin_keep_blank_lines_before_right_brace = 2
+ij_kotlin_keep_blank_lines_in_code = 2
+ij_kotlin_keep_blank_lines_in_declarations = 2
+ij_kotlin_keep_first_column_comment = true
+ij_kotlin_keep_indents_on_empty_lines = false
+ij_kotlin_keep_line_breaks = true
+ij_kotlin_lbrace_on_next_line = false
+ij_kotlin_line_comment_add_space = false
+ij_kotlin_line_comment_at_first_column = true
+ij_kotlin_method_annotation_wrap = split_into_lines
+ij_kotlin_method_call_chain_wrap = normal
+ij_kotlin_method_parameters_new_line_after_left_paren = true
+ij_kotlin_method_parameters_right_paren_on_new_line = true
+ij_kotlin_method_parameters_wrap = on_every_item
+ij_kotlin_name_count_to_use_star_import = 9999
+ij_kotlin_name_count_to_use_star_import_for_members = 9999
+ij_kotlin_parameter_annotation_wrap = off
+ij_kotlin_space_after_comma = true
+ij_kotlin_space_after_extend_colon = true
+ij_kotlin_space_after_type_colon = true
+ij_kotlin_space_before_catch_parentheses = true
+ij_kotlin_space_before_comma = false
+ij_kotlin_space_before_extend_colon = true
+ij_kotlin_space_before_for_parentheses = true
+ij_kotlin_space_before_if_parentheses = true
+ij_kotlin_space_before_lambda_arrow = true
+ij_kotlin_space_before_type_colon = false
+ij_kotlin_space_before_when_parentheses = true
+ij_kotlin_space_before_while_parentheses = true
+ij_kotlin_spaces_around_additive_operators = true
+ij_kotlin_spaces_around_assignment_operators = true
+ij_kotlin_spaces_around_equality_operators = true
+ij_kotlin_spaces_around_function_type_arrow = true
+ij_kotlin_spaces_around_logical_operators = true
+ij_kotlin_spaces_around_multiplicative_operators = true
+ij_kotlin_spaces_around_range = false
+ij_kotlin_spaces_around_relational_operators = true
+ij_kotlin_spaces_around_unary_operator = false
+ij_kotlin_spaces_around_when_arrow = true
+ij_kotlin_variable_annotation_wrap = off
+ij_kotlin_while_on_new_line = false
+ij_kotlin_wrap_elvis_expressions = 1
+ij_kotlin_wrap_expression_body_functions = 1
+ij_kotlin_wrap_first_method_in_call_chain = false
+
 [.editorconfig]
 ij_editorconfig_align_group_field_declarations = false
 ij_editorconfig_space_after_colon = false

build.gradle

@@ -1,8 +1,15 @@
 plugins {
   id 'java'
   id 'io.quarkus'
+
   id 'com.adarshr.test-logger' version '3.2.0'
   id "org.kordamp.gradle.jandex" version "2.0.0"
+
+  id "org.jetbrains.kotlin.jvm" version "2.0.21"
+  id "org.jetbrains.kotlin.plugin.allopen" version "2.0.21"
+
+  id "io.gitlab.arturbosch.detekt" version "1.23.7"
+  id "com.diffplug.spotless" version "6.25.0"
 }
 
 apply from: 'code-analysis/code-analysis.gradle'
@@ -20,6 +27,9 @@ dependencies {
 
   implementation 'io.quarkus:quarkus-container-image-jib'
 
+  implementation "io.quarkus:quarkus-kotlin"
+  implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
+
   // Needed for scheduled jobs
   implementation 'io.quarkus:quarkus-scheduler'
 
@@ -67,6 +77,10 @@ compileTestJava {
   options.encoding = 'UTF-8'
 }
 
+kotlin {
+  jvmToolchain(21)
+}
+
 java {
   sourceCompatibility = JavaVersion.VERSION_21
   targetCompatibility = JavaVersion.VERSION_21
@@ -138,6 +152,15 @@ tasks.named('quarkusDependenciesBuild') {
   dependsOn 'jandex'
 }
 
+spotless {
+  kotlin {
+    ktfmt().kotlinlangStyle().configure {
+      it.setMaxWidth(120)
+    }
+  }
+}
+
+
 tasks.withType(JavaCompile).configureEach {
   // Turn on all javac warnings except classfile and processing, which produces many false-positives about annotations
   options.compilerArgs << "-Xlint:all" << "-Xlint:-classfile" << "-Xlint:-processing"
@@ -148,6 +171,14 @@ test {
   testLogging.showStandardStreams = true
 }
 
+// Needed by Mockito since closed Kotlin classes cannot be mocked
+allOpen {
+  annotation("jakarta.ws.rs.Path")
+  annotation("jakarta.enterprise.context.ApplicationScoped")
+  annotation("jakarta.persistence.Entity")
+  annotation("io.quarkus.test.junit.QuarkusTest")
+}
+
 integrationTest {
   useJUnitPlatform()
   testLogging.showStandardStreams = true