Add Scala.js support for completions install on node

build.sc

@@ -224,6 +224,13 @@ object tests extends Module {
         Deps.utest
       )
       def testFramework = "utest.runner.Framework"
+      // not sure why we need to manually add this one
+      def sources = T.sources(super.sources() ++ CrossSources.extraSourcesDirs(
+        scalaVersion(),
+        millSourcePath,
+        "js",
+        "test"
+      ))
     }
   }
   trait TestsNative extends Tests0 with CaseAppScalaNativeModule {

core/js/src/main/scala/caseapp/core/app/nio/File.scala

@@ -0,0 +1,5 @@
+package caseapp.core.app.nio
+
+object File {
+  def separator = Path.nodePath.sep.asInstanceOf[String]
+}

core/js/src/main/scala/caseapp/core/app/nio/FileOps.scala

@@ -0,0 +1,34 @@
+package caseapp.core.app.nio
+
+import scala.scalajs.js
+import scala.scalajs.js.Dynamic.{global => g}
+
+object FileOps {
+
+  private lazy val nodeFs      = g.require("fs")
+  private lazy val nodeOs      = g.require("os")
+  private lazy val nodeProcess = g.require("process")
+
+  def readFile(path: Path): String =
+    nodeFs.readFileSync(path.underlying, js.Dictionary("encoding" -> "utf8")).asInstanceOf[String]
+  def writeFile(path: Path, content: String): Unit =
+    nodeFs.writeFileSync(path.underlying, content)
+  def appendToFile(path: Path, content: String): Unit =
+    nodeFs.writeFileSync(path.underlying, content, js.Dictionary("mode" -> "a"))
+  def readEnv(varName: String): Option[String] =
+    nodeProcess.env.asInstanceOf[js.Dictionary[String]].get(varName)
+  def homeDir: Path =
+    Paths.get(nodeOs.homedir().asInstanceOf[String])
+
+  def createDirectories(path: Path): Unit =
+    nodeFs.mkdirSync(path.underlying, js.Dictionary("recursive" -> true))
+
+  // simple aliases, to avoid explicit imports of Files,
+  // which might point to _root_.java.nio.file.Files or _root_.caseapp.core.app.nio.Files
+  def exists(path: Path): Boolean =
+    Files.exists(path)
+  def isRegularFile(path: Path): Boolean =
+    Files.isRegularFile(path)
+  def deleteIfExists(path: Path): Boolean =
+    Files.deleteIfExists(path)
+}

core/js/src/main/scala/caseapp/core/app/nio/Files.scala

@@ -0,0 +1,20 @@
+package caseapp.core.app.nio
+
+import scala.scalajs.js
+import scala.scalajs.js.Dynamic.{global => g}
+
+object Files {
+
+  def exists(path: Path): Boolean =
+    nodeFs.existsSync(path.underlying).asInstanceOf[Boolean]
+  def createDirectories(path: Path): Unit =
+    nodeFs.mkdirSync(path.underlying, js.Dictionary("recursive" -> true))
+  def isRegularFile(path: Path): Boolean =
+    exists(path) && nodeFs.statSync(path.underlying).isFile().asInstanceOf[Boolean]
+  def deleteIfExists(path: Path): Boolean = {
+    nodeFs.rmSync(path.underlying, js.Dictionary("recursive" -> true))
+    true
+  }
+
+  private lazy val nodeFs = g.require("fs")
+}

core/js/src/main/scala/caseapp/core/app/nio/Path.scala

@@ -0,0 +1,19 @@
+package caseapp.core.app.nio
+
+import scala.scalajs.js
+import scala.scalajs.js.Dynamic.{global => g}
+
+final case class Path(underlying: String) {
+  import Path.nodePath
+  def resolve(chunk: String): Path =
+    Path(nodePath.join(underlying, chunk).asInstanceOf[String])
+  def getFileName: Path =
+    Path(nodePath.basename(underlying).asInstanceOf[String])
+  def getParent: Path =
+    Path(nodePath.join(underlying, "..").asInstanceOf[String])
+  override def toString: String = underlying
+}
+
+object Path {
+  private[nio] lazy val nodePath = g.require("path")
+}

core/js/src/main/scala/caseapp/core/app/nio/Paths.scala

@@ -0,0 +1,6 @@
+package caseapp.core.app.nio
+
+object Paths {
+  def get(path: String): Path =
+    Path(path)
+}

core/jvm-native/src/main/scala/caseapp/core/app/nio/FileOps.scala

@@ -0,0 +1,34 @@
+package caseapp.core.app.nio
+
+import java.nio.charset.StandardCharsets
+import java.nio.file.{FileAlreadyExistsException, Files, Path, Paths, StandardOpenOption}
+
+object FileOps {
+
+  def readFile(path: Path): String =
+    new String(Files.readAllBytes(path), StandardCharsets.UTF_8)
+  def writeFile(path: Path, content: String): Unit =
+    Files.write(path, content.getBytes(StandardCharsets.UTF_8))
+  def appendToFile(path: Path, content: String): Unit =
+    Files.write(path, content.getBytes(StandardCharsets.UTF_8), StandardOpenOption.APPEND)
+  def readEnv(varName: String): Option[String] =
+    Option(System.getenv(varName))
+  def homeDir: Path =
+    Paths.get(sys.props("user.home"))
+
+  def createDirectories(path: Path): Unit =
+    try Files.createDirectories(path)
+    catch {
+      // Ignored, see https://bugs.openjdk.java.net/browse/JDK-8130464
+      case _: FileAlreadyExistsException if Files.isDirectory(path) =>
+    }
+
+  // simple aliases, to avoid explicit imports of Files,
+  // which might point to _root_.java.nio.file.Files or _root_.caseapp.core.app.nio.Files
+  def exists(path: Path): Boolean =
+    Files.exists(path)
+  def isRegularFile(path: Path): Boolean =
+    Files.isRegularFile(path)
+  def deleteIfExists(path: Path): Boolean =
+    Files.deleteIfExists(path)
+}

core/jvm-native/src/main/scala/caseapp/core/app/nio/package.scala

@@ -0,0 +1,17 @@
+package caseapp.core.app
+
+package object nio {
+
+  type Path = java.nio.file.Path
+
+  object Paths {
+    def get(path: String): Path =
+      java.nio.file.Paths.get(path)
+  }
+
+  object File {
+    def separator: String =
+      java.io.File.separator
+  }
+
+}