Drop old KtLint support - 0.3x and 0.45.2 (#1475)

Author: nedtwigg

Diff for: CHANGES.md

@@ -20,6 +20,9 @@ We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (
 ### Changes
 * Rename `YamlJacksonStep` into `JacksonYamlStep` while normalizing Jackson usage ([#1492](https://github.com/diffplug/spotless/pull/1492))
 * Convert `gson` integration to use a compile-only source set ([#1510](https://github.com/diffplug/spotless/pull/1510)).
+* ** POTENTIALLY BREAKING** Removed support for KtLint 0.3x and 0.45.2 ([#1475](https://github.com/diffplug/spotless/pull/1475))
+  * `KtLint` does not maintain a stable API - before this PR, we supported every breaking change in the API since 2019.
+  * From now on, we will support no more than 2 breaking changes at a time.
 
 ## [2.32.0] - 2023-01-13
 ### Added

Diff for: lib/build.gradle

@@ -29,11 +29,10 @@ for (glue in NEEDS_GLUE) {
 versionCompatibility {
 	adapters {
 		namespaces.register('KtLint') {
+			// as discussed at https://github.com/diffplug/spotless/pull/1475
+			// we will support no more than 2 breaking changes at a time = 3 incompatible versions
+			// we will try to drop down to only one version if a stable API can be maintained for a full year
 			versions = [
-				'0.31.0',
-				'0.32.0',
-				'0.34.2',
-				'0.45.2',
 				'0.46.0',
 				'0.47.0',
 				'0.48.0',
@@ -81,21 +80,6 @@ dependencies {
 	ktlintCompileOnly "com.pinterest.ktlint:ktlint-ruleset-experimental:$VER_KTLINT"
 	ktlintCompileOnly "com.pinterest.ktlint:ktlint-ruleset-standard:$VER_KTLINT"
 
-	compatKtLint0Dot31Dot0CompileOnly 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.5.20'
-	compatKtLint0Dot31Dot0CompileOnly 'com.github.shyiko.ktlint:ktlint-core:0.31.0'
-	compatKtLint0Dot31Dot0CompileOnly 'com.github.shyiko.ktlint:ktlint-ruleset-experimental:0.31.0'
-	compatKtLint0Dot31Dot0CompileOnly 'com.github.shyiko.ktlint:ktlint-ruleset-standard:0.31.0'
-	compatKtLint0Dot32Dot0CompileOnly 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.5.20'
-	compatKtLint0Dot32Dot0CompileOnly 'com.pinterest.ktlint:ktlint-core:0.32.0'
-	compatKtLint0Dot32Dot0CompileOnly 'com.pinterest.ktlint:ktlint-ruleset-experimental:0.32.0'
-	compatKtLint0Dot32Dot0CompileOnly 'com.pinterest.ktlint:ktlint-ruleset-standard:0.32.0'
-	compatKtLint0Dot34Dot2CompileOnly 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.5.20'
-	compatKtLint0Dot34Dot2CompileOnly 'com.pinterest.ktlint:ktlint-core:0.34.2'
-	compatKtLint0Dot34Dot2CompileOnly 'com.pinterest.ktlint:ktlint-ruleset-experimental:0.34.2'
-	compatKtLint0Dot34Dot2CompileOnly 'com.pinterest.ktlint:ktlint-ruleset-standard:0.34.2'
-	compatKtLint0Dot45Dot2CompileOnly 'com.pinterest.ktlint:ktlint-core:0.45.2'
-	compatKtLint0Dot45Dot2CompileOnly 'com.pinterest.ktlint:ktlint-ruleset-experimental:0.45.2'
-	compatKtLint0Dot45Dot2CompileOnly 'com.pinterest.ktlint:ktlint-ruleset-standard:0.45.2'
 	compatKtLint0Dot46Dot0CompileOnly 'com.pinterest.ktlint:ktlint-core:0.46.0'
 	compatKtLint0Dot46Dot0CompileOnly 'com.pinterest.ktlint:ktlint-ruleset-experimental:0.46.0'
 	compatKtLint0Dot46Dot0CompileOnly 'com.pinterest.ktlint:ktlint-ruleset-standard:0.46.0'

Diff for: lib/src/compatKtLint0Dot31Dot0/java/com/diffplug/spotless/glue/ktlint/compat/KtLintCompat0Dot31Dot0Adapter.java

@@ -44,21 +44,9 @@ public KtlintFormatterFunc(String version, boolean isScript, boolean useExperime
 		} else if (minorVersion == 47) {
 			// rename RuleSet to RuleProvider
 			this.adapter = new KtLintCompat0Dot47Dot0Adapter();
-		} else if (minorVersion >= 46) {
+		} else {
 			// DefaultEditorConfigProperties.INSTANCE.getDefaultEditorConfigProperties() renamed to .getEditorConfigProperties()
 			this.adapter = new KtLintCompat0Dot46Dot0Adapter();
-		} else if (version.equals("0.45.2")) {
-			// add editorConfigOverride
-			this.adapter = new KtLintCompat0Dot45Dot2Adapter();
-		} else if (minorVersion >= 34) {
-			// KtLint.INSTANCE.format() now needs more parameters
-			this.adapter = new KtLintCompat0Dot34Dot2Adapter();
-		} else if (minorVersion >= 32) {
-			// rename packages from `com.github.shyiko` to `com.pinterest`
-			this.adapter = new KtLintCompat0Dot32Dot0Adapter();
-		} else {
-			// the OG
-			this.adapter = new KtLintCompat0Dot31Dot0Adapter();
 		}
 		this.editorConfigPath = editorConfigPath;
 		this.useExperimental = useExperimental;