Add Kotlin Gradle config file class

Adds the Kotlin Gradle config file class
which contains logic to parse 'build.gradle.kts'
files. Refactors Java Gradle config file class
so it can be inherited by KotlinGradle.

ee/lib/ai/context/dependencies/config_files/constants.rb

@@ -13,6 +13,7 @@ module Constants
             ConfigFiles::GoModules,
             ConfigFiles::JavaGradle,
             ConfigFiles::JavaMaven,
+            ConfigFiles::KotlinGradle,
             ConfigFiles::RubyGemsLock
           ].freeze
         end

ee/lib/ai/context/dependencies/config_files/java_gradle.rb

@@ -7,10 +7,12 @@ module ConfigFiles
         class JavaGradle < Base
           START_SECTION_REGEX = /^dependencies {/ # Identifies the dependencies section
           END_SECTION_REGEX = /^}$/
-          PREFIX_REGEX = /^(implementation |testImplementation )/ # Appears before each dependency
-          LONG_FORM_KEYWORD = 'name:' # Only present in the long form dependency definition
+          PREFIX_REGEX = /^['"]?(implementation|testImplementation)['"]?/ # Appears before each dependency
           LONG_FORM_NAME_REGEX = /name:\s*(?<value>[^,\s]*)/
           LONG_FORM_VERSION_REGEX = /version:\s*(?<value>[^,\s]*)/
+          QUOTED_VALUE_REGEX = /(?<quote>["'])(?<value>[^"']+)\k<quote>/ # Matches value between double or single quotes
+          INLINE_COMMENT_REGEX = %r{\s+//.*$}
+          STRING_INTERPOLATION_CHAR = '$'
           EXCLUDE_KEYWORD = '('
           def self.file_name_glob
@@ -28,7 +30,8 @@ def self.lang_name
           # dependencies {
           #     // Short form: <group>:<name>:<version>
           #     implementation 'org.codehaus.groovy:groovy:3.+'
-          #     testImplementation "com.google.guava:guava:29.0.1"
+          #     testImplementation "com.google.guava:guava:29.0.1" // Inline comment
+          #     // The quotes on `implementation` may be a legacy format; ported from Repository X-Ray Go repo
           #     "implementation" 'org.ow2.asm:asm:9.6'
           #
           #     // Long form
@@ -41,7 +44,7 @@ def self.lang_name
           #     runtimeOnly files('libs/a.jar', 'libs/b.jar')
           #
           #     // TODO: https://gitlab.com/gitlab-org/gitlab/-/issues/481317
-          #     // String interpolation is not currently supported; below outputs "$arcgisVersion" as version
+          #     // String interpolation is not currently supported; below outputs nil as version
           #     implementation "com.esri.arcgisruntime:arcgis-java:$arcgisVersion"
           # }
           #
@@ -51,33 +54,40 @@ def extract_libs
             content.each_line do |line|
               line.strip!
-              line.gsub!(/'|"/, '')
+              line.gsub!(INLINE_COMMENT_REGEX, '')
               if START_SECTION_REGEX.match?(line)
                 in_deps_section = true
-              elsif in_deps_section && PREFIX_REGEX.match?(line)
-                libs << parse_lib(line) unless line.include?(EXCLUDE_KEYWORD)
-              elsif in_deps_section && END_SECTION_REGEX.match?(line)
-                break
+              elsif in_deps_section
+                libs << parse_lib(line) if self.class::PREFIX_REGEX.match?(line)
+                break if END_SECTION_REGEX.match?(line)
               end
             end
-            libs
+            libs.compact
           end
           def parse_lib(line)
-            line.gsub!(PREFIX_REGEX, '')
-            if line.include?(LONG_FORM_KEYWORD)
-              # Parse long form
-              name = LONG_FORM_NAME_REGEX.match(line).try(:[], 'value')
-              version = LONG_FORM_VERSION_REGEX.match(line).try(:[], 'value')
+            line.gsub!(self.class::PREFIX_REGEX, '')
+            return if line.include?(EXCLUDE_KEYWORD)
+            long_form_name_match = LONG_FORM_NAME_REGEX.match(line)
+
+            if long_form_name_match
+              # Parse long form (not used in Kotlin Gradle)
+              name = long_form_name_match[:value].delete('"\'')
+              version_match = LONG_FORM_VERSION_REGEX.match(line)
+              version = version_match[:value].delete('"\'') if version_match
             else
               # Parse short form
-              _group, name, version = line.split(':')
+              match = QUOTED_VALUE_REGEX.match(line)
+              _group, name, version = match[:value].split(':') if match
             end
-            Lib.new(name: name, version: version)
+            name = nil if name&.include?(STRING_INTERPOLATION_CHAR)
+            version = nil if version&.include?(STRING_INTERPOLATION_CHAR)
+
+            Lib.new(name: name, version: version) if name
           end
         end
       end

ee/lib/ai/context/dependencies/config_files/kotlin_gradle.rb

+# frozen_string_literal: true
+
+module Ai
+  module Context
+    module Dependencies
+      module ConfigFiles
+        ### Example format:
+        #
+        # dependencies {
+        #     // Format <group>:<name>:<version>
+        #     implementation("org.codehaus.groovy:groovy:3.+")
+        #     testImplementation("com.google.guava:guava:29.0.1") // Inline comment
+        #
+        #     // Project, file, or other dependencies are ignored
+        #     implementation(project(":utils"))
+        #     runtimeOnly(files("libs/a.jar", "libs/b.jar"))
+        #
+        #     // TODO: https://gitlab.com/gitlab-org/gitlab/-/issues/481317
+        #     // String interpolation is not currently supported; below outputs nil as version
+        #     implementation("com.esri.arcgisruntime:arcgis-java:$arcgisVersion")
+        # }
+        #
+        class KotlinGradle < JavaGradle
+          PREFIX_REGEX = /^(implementation|testImplementation)\(/ # Appears before each dependency
+
+          def self.file_name_glob
+            'build.gradle.kts'
+          end
+
+          def self.lang_name
+            'Kotlin'
+          end
+        end
+      end
+    end
+  end
+end

ee/spec/lib/ai/context/dependencies/config_files/java_gradle_spec.rb

@@ -26,7 +26,7 @@
         dependencies { // Comment
             implementation 'org.codehaus.groovy:groovy:3.+'
-            testImplementation "com.google.guava:guava:29.0.1"
+            testImplementation "com.google.guava:guava:29.0.1" // Inline comment
             "implementation" 'org.ow2.asm:asm:9.6'
             implementation group: "org.neo4j", name: "neo4j-jmx", version: "1.3"
@@ -55,7 +55,7 @@
         'neo4j-jmx (1.3)',
         'junit (4.11)',
         'ant (1.10.14)',
-        'arcgis-java ($arcgisVersion)'
+        'arcgis-java'
       ]
     end
   end

ee/spec/lib/ai/context/dependencies/config_files/kotlin_gradle_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Ai::Context::Dependencies::ConfigFiles::KotlinGradle, feature_category: :code_suggestions do
+  it 'returns the expected language value' do
+    expect(described_class.lang).to eq('kotlin')
+  end
+
+  it_behaves_like 'parsing a valid dependency config file' do
+    let(:config_file_content) do
+      <<~CONTENT
+        buildscript {
+            repositories {
+                google()
+                mavenCentral()
+            }
+        }
+
+        val arcgisVersion = "4.5.0"
+
+        dependencies { // Comment
+            implementation("org.codehaus.groovy:groovy:3.+")
+            testImplementation("com.google.guava:guava:29.0.1") // Inline comment
+
+            implementation(project(":utils"))
+            runtimeOnly(files("libs/a.jar", "libs/b.jar"))
+
+            // String interpolation is not currently supported
+            implementation("com.esri.arcgisruntime:arcgis-java:$arcgisVersion")
+        }
+
+        java {
+            withSourcesJar()
+        }
+      CONTENT
+    end
+
+    let(:expected_formatted_lib_names) do
+      [
+        'groovy (3.+)',
+        'guava (29.0.1)',
+        'arcgis-java'
+      ]
+    end
+  end
+
+  it_behaves_like 'parsing an invalid dependency config file'
+
+  describe '.matches?' do
+    using RSpec::Parameterized::TableSyntax
+
+    where(:path, :matches) do
+      'build.gradle.kts'            | true
+      'dir/build.gradle.kts'        | true
+      'dir/subdir/build.gradle.kts' | true
+      'dir/build.gradle'            | false
+      'xbuild.gradle.kts'           | false
+      'Build.gradle.kts'            | false
+      'build_gradle_kts'            | false
+      'build.gradle'                | false
+    end
+
+    with_them do
+      it 'matches the file name glob pattern at various directory levels' do
+        expect(described_class.matches?(path)).to eq(matches)
+      end
+    end
+  end
+end