Migrate away from sbt IO in scala3doc

Fix NamedTypeArguments (again)

Author: romanowski

scala3doc/build.sbt

@@ -8,7 +8,6 @@ libraryDependencies ++= Seq(
   "org.scala-lang" %% "scala3-tasty-inspector" % scalaVersion.value,
 
   "com.virtuslab.dokka" % "dokka-site" % dokkaSiteVersion,
-  "org.scala-sbt" % "io_2.13" % "1.3.4",
   "com.vladsch.flexmark" % "flexmark-all" % flexmarkVersion,
   "com.lihaoyi" % "scalatags_2.13" % scalaTagsVersion,
   "nl.big-o" % "liqp" % "0.6.7",

scala3doc/example-project/src/main/scala/NamedTypeArguments.scala

@@ -1,6 +1,6 @@
 package example
 
-import experimental.namedTypeArguments
+import scala.language.experimental.namedTypeArguments
 
 /**
   * Named Type Arguments: https://dotty.epfl.ch/docs/reference/other-new-features/named-typeargs.html

scala3doc/src/dotty/dokka/IO.java

@@ -0,0 +1,66 @@
+package dotty.dokka;
+
+import java.io.*;
+import java.nio.file.*;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.util.zip.*;
+
+/** This code is mostly using public snippets and tries to mimic sbt-io api. */
+public class IO {
+  public static void delete(File pathToBeDeleted) throws IOException {
+    Files.walkFileTree(pathToBeDeleted.toPath(), 
+      new SimpleFileVisitor<Path>() {
+        @Override
+        public FileVisitResult postVisitDirectory(
+          Path dir, IOException exc) throws IOException {
+            Files.delete(dir);
+            return FileVisitResult.CONTINUE;
+        }
+        
+        @Override
+        public FileVisitResult visitFile(
+          Path file, BasicFileAttributes attrs) 
+          throws IOException {
+            Files.delete(file);
+            return FileVisitResult.CONTINUE;
+        }
+    });
+  }
+
+  private static File newFile(File destinationDir, ZipEntry zipEntry) throws IOException {
+        File destFile = new File(destinationDir, zipEntry.getName());
+        
+        String destDirPath = destinationDir.getCanonicalPath();
+        String destFilePath = destFile.getCanonicalPath();
+        
+        if (!destFilePath.startsWith(destDirPath + File.separator)) {
+            throw new IOException("Entry is outside of the target dir: " + zipEntry.getName());
+        }
+        
+        return destFile;
+    }
+
+  public static File unzip(File fileZip, File destDir) throws IOException {
+      byte[] buffer = new byte[1024];
+      ZipInputStream zis = null;
+      
+      try {
+        zis= new ZipInputStream(new FileInputStream(fileZip));
+        ZipEntry zipEntry = zis.getNextEntry();
+        while (zipEntry != null) {
+            File newFile = newFile(destDir, zipEntry);
+            FileOutputStream fos = new FileOutputStream(newFile);
+            int len;
+            while ((len = zis.read(buffer)) > 0) {
+                fos.write(buffer, 0, len);
+            }
+            fos.close();
+            zipEntry = zis.getNextEntry();
+        }
+        zis.closeEntry();
+      } finally {
+        if (zis != null) zis.close();
+      }
+      return destDir;
+  }
+}

scala3doc/src/dotty/dokka/Main.scala

@@ -12,7 +12,6 @@ import java.util.{List => JList}
 
 import scala.tasty.Reflection
 import scala.tasty.inspector.TastyInspector
-import sbt.io.IO
 import java.nio.file.Files
 
 import org.kohsuke.args4j.{CmdLineParser, Option => COption}