Update documentation

* Generate dokka
* Update mkdocs version
* Group adjacent code blocks into tabs
* Switch api docs to gfm format

CHANGELOG.md

@@ -11,7 +11,7 @@
 ### Changed
 - If multiple `--` tokens are present on the command line, all subsequent occurrences after the first are now parsed as positional arguments. Previously, subsequent `--` tokens were skipped.  
 - The `PlaintextHelpFormatter` has been replaced with `CliktHelpFormatter`, which is more customizable. See [the docs](https://ajalt.github.io/clikt/documenting/) for more info, or the [new sample](samples/ansicolors/README.md) for an example of customizing help output to use ANSI colors.
-- Some of the properties and constructor parameters for [`OptionWithValues`](https://ajalt.github.io/clikt/api/clikt/com.github.ajalt.clikt.parameters.options/-option-with-values/index.html) and [`ProcessedArgument`](https://ajalt.github.io/clikt/api/clikt/com.github.ajalt.clikt.parameters.arguments/-processed-argument/index.html) have changed.
+- Some of the properties and constructor parameters for [`OptionWithValues`](https://ajalt.github.io/clikt/api/clikt/com.github.ajalt.clikt.parameters.options/-option-with-values/) and [`ProcessedArgument`](https://ajalt.github.io/clikt/api/clikt/com.github.ajalt.clikt.parameters.arguments/-processed-argument/) have changed.
 - The `OptionDelegate` interface has changed, and `GroupableOption` and `ParameterHolder` interfaces have been added to work with option groups.
 - [Parameter validation](https://ajalt.github.io/clikt/parameters/#parameter-validation) now occurs after all parameter delegates have set their values, so the lambdas passed to `validate` may reference other parameters. 
 

build.gradle

@@ -8,13 +8,18 @@ buildscript {
 
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-        classpath "org.jetbrains.dokka:dokka-gradle-plugin:0.9.17"
+        classpath "org.jetbrains.dokka:dokka-gradle-plugin:0.9.18"
     }
 }
 
 apply plugin: 'idea'
 apply plugin: 'org.jetbrains.dokka'
 
+repositories {
+    mavenCentral()
+    jcenter()
+}
+
 subprojects {
     apply plugin: 'kotlin'
 

clikt/build.gradle

@@ -37,6 +37,7 @@ artifacts {
 
 dokka {
     outputDirectory = "$rootDir/docs/api"
+    outputFormat = 'gfm'
 }
 
 ext {

clikt/src/main/kotlin/com/github/ajalt/clikt/core/exceptions.kt

@@ -4,6 +4,7 @@ import com.github.ajalt.clikt.parameters.arguments.Argument
 import com.github.ajalt.clikt.parameters.arguments.convert
 import com.github.ajalt.clikt.parameters.groups.ParameterGroup
 import com.github.ajalt.clikt.parameters.options.Option
+import kotlin.math.exp
 
 /**
  * An internal error that signals Clikt to abort.

docs/advanced.md

@@ -12,13 +12,13 @@ like the way you can configure git to accept `git ci` as an alias for
 `git commit`.
 
 To implement command aliases, override
-[`CliktCommand.aliases`](api/clikt/com.github.ajalt.clikt.core/-clikt-command/aliases.html) in your
+[`CliktCommand.aliases`](/api/clikt/com.github.ajalt.clikt.core/-clikt-command/aliases/) in your
 command. This function is called once at the start of parsing, and returns a map of aliases to the
 tokens that they alias to.
 
 To implement git-style aliases:
 
-```kotlin
+```kotlin tab="Example"
 class Repo : NoRunCliktCommand() {
     // You could load the aliases from a config file etc.
     override fun aliases(): Map<String, List<String>> = mapOf(
@@ -37,14 +37,12 @@ class Commit: CliktCommand() {
 fun main(args: Array<String>) = Repo().subcommands(Commit()).main(args)
 ```
 
-And on the command line:
-
-```
+```text tab="Usage 1"
 $ ./repo ci -m 'my message'
 Committing with message: my message
 ```
 
-```
+```text tab="Usage 2"
 $ ./repo cm 'my message'
 Committing with message: my message
 ```
@@ -100,12 +98,12 @@ Running Bar
 
 To prevent ambiguities in parsing, aliases are only supported for
 command names. However, there's another way to modify user input that
-works on more types of tokens. You can set a [`tokenTransformer`](api/clikt/com.github.ajalt.clikt.core/-context/token-transformer.html) on the
+works on more types of tokens. You can set a [`tokenTransformer`](/api/clikt/com.github.ajalt.clikt.core/-context/token-transformer/) on the
 [command's context](commands.md#customizing-contexts) that will be
 called for each option and command name that is input. This can be used
 to implement case-insensitive parsing, for example:
 
-```kotlin
+```kotlin tab="Example"
 class Hello : CliktCommand() {
     init {
         context { tokenTransformer = { it.toLowerCase() } }
@@ -116,18 +114,18 @@ class Hello : CliktCommand() {
 }
 ```
 
-```
+```text tab="Usage"
 $ ./hello --NAME=Foo
 Hello Foo!
 ```
 
 ## Replacing stdin and stdout
 
-By default, functions like [`CliktCommand.main`](api/clikt/com.github.ajalt.clikt.core/-clikt-command/main.html)
-and [`option().prompt()`](api/clikt/com.github.ajalt.clikt.parameters.options/prompt.html)
+By default, functions like [`CliktCommand.main`](/api/clikt/com.github.ajalt.clikt.core/-clikt-command/main/)
+and [`option().prompt()`](/api/clikt/com.github.ajalt.clikt.parameters.options/prompt/)
 read from `System.in` and write to `System.out`. If you want to use
 clikt in an environment where the standard streams aren't available, you
-can set your own implementation of [`CliktConsole`](api/clikt/com.github.ajalt.clikt.output/-clikt-console/index.html)
+can set your own implementation of [`CliktConsole`](/api/clikt/com.github.ajalt.clikt.output/-clikt-console/)
 when [customizing the command context](commands.md#customizing-contexts).
 
 ```kotlin
@@ -153,7 +151,7 @@ class CustomCLI : CliktCommand() {
 ```
 
 If you are using
-[`TermUI`](api/clikt/com.github.ajalt.clikt.output/-term-ui/index.html)
+[`TermUI`](/api/clikt/com.github.ajalt.clikt.output/-term-ui/)
 directly, you can also pass your custom console as an argument.
 
 ## Command Line Argument Files