Bump Spotless to v7

This updates spotless to v7

Kotlin lambdas can't be serialized effectively by {spotless / gradle}
right now so this replaces those lambdas with anonymous classes that
implement `FormatterFunc`

Author: JordonPhillips

buildSrc/src/main/kotlin/smithy.formatting-conventions.gradle.kts

@@ -1,3 +1,5 @@
+import com.diffplug.spotless.FormatterFunc
+import java.io.Serializable
 import java.util.regex.Pattern
 
 plugins {
@@ -14,13 +16,25 @@ spotless {
         // Enforce a common license header on all files
         licenseHeaderFile("${project.rootDir}/config/spotless/license-header.txt")
             .onlyIfContentMatches("^((?!SKIPLICENSECHECK)[\\s\\S])*\$")
-        indentWithSpaces()
+        leadingTabsToSpaces()
         endWithNewline()
         eclipse().configFile("${project.rootDir}/config/spotless/formatting.xml")
+
         // Fixes for some strange formatting applied by eclipse:
         // see: https://github.com/kamkie/demo-spring-jsf/blob/bcacb9dc90273a5f8d2569470c5bf67b171c7d62/build.gradle.kts#L159
-        custom("Lambda fix") { it.replace("} )", "})").replace("} ,", "},") }
-        custom("Long literal fix") { Pattern.compile("([0-9_]+) [Ll]").matcher(it).replaceAll("\$1L") }
+        // These have to be implemented with anonymous classes this way instead of lambdas because of:
+        // https://github.com/diffplug/spotless/issues/2387
+        custom("Lambda fix", object : Serializable, FormatterFunc {
+            override fun apply(input: String) : String {
+                return input.replace("} )", "})").replace("} ,", "},")
+            }
+        })
+        custom("Long literal fix", object : Serializable, FormatterFunc {
+            override fun apply(input: String) : String {
+                return Pattern.compile("([0-9_]+) [Ll]").matcher(input).replaceAll("\$1L")
+            }
+        })
+
         // Static first, then everything else alphabetically
         removeUnusedImports()
         importOrder("\\#", "")
@@ -31,7 +45,7 @@ spotless {
     // Formatting for build.gradle.kts files
     kotlinGradle {
         ktlint()
-        indentWithSpaces()
+        leadingTabsToSpaces()
         trimTrailingWhitespace()
         endWithNewline()
         licenseHeaderFile(

gradle/libs.versions.toml

@@ -3,7 +3,7 @@ junit5 = "5.11.3"
 hamcrest = "3.0"
 jmh = "0.6.6"
 spotbugs = "6.0.22"
-spotless = "6.25.0"
+spotless = "7.0.2"
 smithy-gradle = "1.1.0"
 assertj = "3.26.3"
 prettier4j = "0.1.1"

smithy-cli/build.gradle.kts

@@ -88,9 +88,15 @@ if (Os.isFamily(Os.FAMILY_WINDOWS)) {
 // This is needed in order for integration tests to find the CLI runtime image
 val smithyBinary =
     if (Os.isFamily(Os.FAMILY_WINDOWS)) {
-        layout.buildDirectory.file("image/smithy-cli-$imageOs/bin/smithy.bat").get().asFile.path
+        layout.buildDirectory
+            .file("image/smithy-cli-$imageOs/bin/smithy.bat")
+            .get()
+            .asFile.path
     } else {
-        layout.buildDirectory.file("image/smithy-cli-$imageOs/bin/smithy").get().asFile.path
+        layout.buildDirectory
+            .file("image/smithy-cli-$imageOs/bin/smithy")
+            .get()
+            .asFile.path
     }
 System.setProperty("SMITHY_BINARY", smithyBinary)
 
@@ -142,9 +148,10 @@ runtime {
     // is configured for the runtime
     // NOTE: For the runtime task, you *must* have the right JDK set up in your environment (17 at the time of writing)
     javaHome =
-        javaToolchains.launcherFor {
-            languageVersion.set(JavaLanguageVersion.of(imageJreVersion))
-        }.map { it.metadata.installationPath.asFile.path }
+        javaToolchains
+            .launcherFor {
+                languageVersion.set(JavaLanguageVersion.of(imageJreVersion))
+            }.map { it.metadata.installationPath.asFile.path }
 }
 
 tasks {