Merge pull request #423 from rberenguel/fix/camel_case_autocompletion

Fix/camel case autocompletion

frontend/src/main/scala/bloop/cli/completion/Case.scala

@@ -0,0 +1,24 @@
+package bloop.cli.completion
+
+import caseapp.core.Arg
+import caseapp.Name
+
+object Case {
+  private val Kebab = "-([a-z])".r
+  private val Camel = "([A-Z])".r
+
+  private def camelToKebab(camel: String): String = {
+    val m = Camel.pattern.matcher(camel)
+    val sb = new StringBuffer
+    while (m.find()) {
+      m.appendReplacement(sb, "-" + m.group().toLowerCase())
+    }
+    m.appendTail(sb)
+    sb.toString
+  }
+
+  def kebabizeArg(arg: Arg): Arg = {
+    val kebabizedExtraNames = arg.extraNames.map((n: Name) => Name(camelToKebab(n.name)))
+    arg.copy(extraNames = kebabizedExtraNames)
+  }
+}

frontend/src/main/scala/bloop/engine/Interpreter.scala

@@ -5,7 +5,7 @@ import bloop.bsp.BspServer
 import scala.annotation.tailrec
 import bloop.cli.{BspProtocol, CliOptions, Commands, ExitStatus, ReporterKind}
 import bloop.cli.CliParsers.CommandsMessages
-import bloop.cli.completion.Mode
+import bloop.cli.completion.{Case, Mode}
 import bloop.io.SourceWatcher
 import bloop.io.Timer.timed
 import bloop.reporter.ReporterConfig
@@ -231,7 +231,7 @@ object Interpreter {
           command <- cmd.command
           message <- CommandsMessages.messages.toMap.get(command)
           arg <- message.args
-          completion <- cmd.format.showArg(command, arg)
+          completion <- cmd.format.showArg(command, Case.kebabizeArg(arg))
         } state.logger.info(completion)
       case Mode.Reporters =>
         for {