Bump Dokka's version with general maintenance

build.gradle.kts

@@ -39,9 +39,8 @@ allprojects {
 
     tasks.withType<KotlinCompile> {
         kotlinOptions.apply {
-            languageVersion = "1.3"
+            languageVersion = "1.6"
             jvmTarget = "1.8"
-            freeCompilerArgs = freeCompilerArgs + listOf("-Xskip-runtime-version-check")
             allWarningsAsErrors = true
         }
     }

gradle.properties

@@ -5,7 +5,7 @@
 version=0.3.0-SNAPSHOT
 group=org.jetbrains.kotlinx
 
-kotlinVersion=1.4.32
-dokkaVersion=1.5.0
+kotlinVersion=1.6.10
+dokkaVersion=1.6.10
 freemarkerVersion=2.3.29
 pluginPublishVersion=0.15.0

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

src/Knit.kt

@@ -453,7 +453,7 @@ private fun String.capitalizeAfter(char: Char): String = buildString {
     var cap = false
     for (c in this@capitalizeAfter) {
         cap = if (c == char) true else {
-            append(if (cap) c.toUpperCase() else c)
+            append(if (cap) c.uppercaseChar() else c)
             false
         }
     }
@@ -462,7 +462,7 @@ private fun String.capitalizeAfter(char: Char): String = buildString {
 data class TocRef(val levelPrefix: String, val name: String, val ref: String)
 
 fun makeTest(knit: KnitRef, testLines: List<String>, param: String): TestCase =
-    TestCase(knit.props, knit.name, knit.name.capitalize(), param, testLines)
+    TestCase(knit.props, knit.name, knit.name.capitalizeFirstChar(), param, testLines)
 
 @Suppress("unused") // This class is passed to freemarker template
 class TestTemplateEnv(
@@ -542,7 +542,7 @@ private const val skippedTocSymbols = "\\,`*{}[]()/#+.!"
 fun makeSectionRef(name: String): String = name
     .replace(' ', '-')
     .replace(("[" + Regex.escape(skippedTocSymbols) + "]").toRegex(), "")
-    .toLowerCase()
+    .lowercase()
 
 enum class IncludeType { INCLUDE, PREFIX, SUFFIX }
 

src/KnitApiParser.kt

@@ -51,7 +51,7 @@ class ApiIndex {
 
     // taking the shortest reference among candidates, prefer classes to functions
     operator fun get(name: String): String? =
-            m[name]?.minWith(apiLinkComparator)?.link
+            m[name]?.minWithOrNull(apiLinkComparator)?.link
 }
 
 private fun ApiIndex.addName(pkg: String, name: String, path: String, link: String, type: DocumentableType, namePrefix: String) {
@@ -160,7 +160,7 @@ fun KnitContext.processApiIndex(
         val siteLink = "$siteRoot/$link"
         indexList += "[$refName]: $siteLink"
         it.remove()
-        val oldNameCase = uppercaseApiRefNames.put(refName.toUpperCase(Locale.ROOT), refName)
+        val oldNameCase = uppercaseApiRefNames.put(refName.uppercase(Locale.ROOT), refName)
         if (oldNameCase != null) {
             log.warn("WARNING: $inputFile: References [$refName] and [$oldNameCase] are different only in case, not distinguishable in markdown.")
         }

src/KnitUtil.kt

@@ -5,6 +5,7 @@
 package kotlinx.knit
 
 import java.io.*
+import java.util.*
 
 fun <T : LineNumberReader> KnitContext.withLineNumberReader(file: File, factory: (Reader) -> T, block: T.() -> Unit): T? {
     val reader = factory(file.reader())
@@ -19,4 +20,12 @@ fun <T : LineNumberReader> KnitContext.withLineNumberReader(file: File, factory:
     return reader
 }
 
-operator fun File.div(path: String): File = File(this, path.replace("/", File.separator))
+operator fun File.div(path: String): File = File(this, path.replace("/", File.separator))
+
+internal fun String.capitalizeFirstChar() = this.replaceFirstChar {
+    if (it.isLowerCase()) {
+        it.titlecase(Locale.getDefault())
+    } else {
+        it.toString()
+    }
+}

test/TestDataGen.kt

@@ -50,7 +50,7 @@ private fun writeTest(out: PrintWriter, type: TestCaseType, inPath: Path) {
     val inFileName = inPath.fileName.toString()
     assertTrue(inFileName.endsWith(type.inSuffix))
     val testPrefix = inFileName.substring(0, inFileName.length - type.inSuffix.length)
-    val testName = testPrefix.split("-").map { it.capitalize() }.joinToString("")
+    val testName = testPrefix.split("-").joinToString("") { it.capitalizeFirstChar() }
     val outPath = TEST_DATA_DIR.resolve(testPrefix + type.outSuffix).takeIfExists() ?: inPath
     val propsPath = TEST_DATA_DIR.resolve(testPrefix + PROPERTIES_SUFFIX).takeIfExists()
     val params = mutableListOf<Any?>(testName, inPath, outPath, propsPath)