Config: use nio.Path instead of io.File

scalafmt-cli/src/main/scala/org/scalafmt/cli/CliOptions.scala

@@ -56,9 +56,9 @@ object CliOptions {
   )(candidate: PrintStream): PrintStream =
     if (p) NoopOutputStream.printStream else candidate
 
-  private def tryGetConfigFile(dir: AbsoluteFile): Option[File] = {
-    val file = (dir / ".scalafmt.conf").jfile
-    if (file.isFile) Some(file) else None
+  private def tryGetConfigFile(dir: AbsoluteFile): Option[Path] = {
+    val file = dir / ".scalafmt.conf"
+    if (file.isRegularFile) Some(file.asPath) else None
   }
 
 }
@@ -133,10 +133,10 @@ case class CliOptions(
     configPathOpt.get
 
   private[cli] def configPathOpt: Option[Path] =
-    tempConfigPath.orElse(canonicalConfigFile.map(_.toPath))
+    tempConfigPath.orElse(canonicalConfigFile)
 
   private lazy val canonicalConfigFile = config
-    .map(AbsoluteFile.fromFile(_, common.workingDirectory).jfile)
+    .map(AbsoluteFile.fromFile(_, common.workingDirectory).asPath)
     .orElse(tryGetConfigFile(common.workingDirectory))
     .orElse(gitOps.rootDir.flatMap(tryGetConfigFile))
 

scalafmt-core/shared/src/main/scala/org/scalafmt/Scalafmt.scala

@@ -181,7 +181,7 @@ object Scalafmt {
 
   // used by ScalafmtReflect.parseConfig
   def parseHoconConfigFile(configPath: Path): Configured[ScalafmtConfig] =
-    Config.fromHoconFile(configPath.toFile, ScalafmtConfig.uncheckedDefault)
+    Config.fromHoconFile(configPath, ScalafmtConfig.uncheckedDefault)
 
   // used by ScalafmtReflect.parseConfig
   def parseHoconConfig(configString: String): Configured[ScalafmtConfig] =

scalafmt-core/shared/src/main/scala/org/scalafmt/config/Config.scala

@@ -1,6 +1,6 @@
 package org.scalafmt.config
 
-import java.io.File
+import java.nio.file.Path
 
 import metaconfig._
 import org.scalafmt.config.PlatformConfig._
@@ -15,7 +15,7 @@ object Config {
   def hoconStringToConf(input: String, path: Option[String]): Configured[Conf] =
     Input.String(input).parse(path)
 
-  def hoconFileToConf(input: File, path: Option[String]): Configured[Conf] =
+  def hoconFileToConf(input: Path, path: Option[String]): Configured[Conf] =
     Configured
       .fromExceptionThrowing(Input.File(input))
       .andThen(_.parse(path))
@@ -29,7 +29,7 @@ object Config {
 
   /** Read ScalafmtConfig from String contents from an optional HOCON path. */
   def fromHoconFile(
-      file: File,
+      file: Path,
       default: ScalafmtConfig = ScalafmtConfig.default,
       path: Option[String] = None
   ): Configured[ScalafmtConfig] =

scalafmt-core/shared/src/main/scala/org/scalafmt/util/AbsoluteFile.scala

@@ -1,13 +1,20 @@
 package org.scalafmt.util
 
 import java.io.File
+import java.nio.file.Path
 
 /** Wrapper around java.io.File with an absolute path. */
 sealed abstract case class AbsoluteFile(jfile: File) {
   def path: String = jfile.getAbsolutePath
   def exists: Boolean = jfile.exists()
   def /(other: String) = new AbsoluteFile(new File(jfile, other)) {}
 
+  @inline
+  def asPath: Path = jfile.toPath
+
+  @inline
+  def isRegularFile: Boolean = FileOps.isRegularFile(jfile)
+
   override def toString(): String = path
 }
 

scalafmt-core/shared/src/main/scala/org/scalafmt/util/FileOps.scala

@@ -10,6 +10,11 @@ object FileOps {
     if (file.isAbsolute) file
     else new File(workingDir, file.getPath)
 
+  @inline
+  def getLastModifiedMsec(file: Path): Long =
+    Files.getLastModifiedTime(file, LinkOption.NOFOLLOW_LINKS).toMillis
+
+  @inline
   def isRegularFile(file: File): Boolean =
     Files.isRegularFile(file.toPath, LinkOption.NOFOLLOW_LINKS)
 

scalafmt-core/shared/src/main/scala/org/scalafmt/util/StyleCache.scala

@@ -2,7 +2,7 @@ package org.scalafmt.util
 
 import scala.collection.mutable
 
-import java.io.File
+import java.nio.file.Paths
 
 import metaconfig.Configured
 import metaconfig.Configured.Ok
@@ -22,8 +22,8 @@ object StyleCache {
   }
 
   def getStyleForFileOrError(filename: String): Configured[ScalafmtConfig] = {
-    val file = new File(filename)
-    val lastModified = file.lastModified()
+    val file = Paths.get(filename)
+    val lastModified = FileOps.getLastModifiedMsec(file)
     val configUnchanged = timeStamps.get(filename).contains(lastModified)
     timeStamps.update(filename, lastModified)
     styleCache.get(filename) match {

scalafmt-tests/src/test/scala/org/scalafmt/cli/CliOptionsTest.scala

@@ -50,7 +50,7 @@ class CliOptionsTest extends FunSuite {
         )
       )
       .configPath
-    val config = Config.fromHoconFile(path.toFile).get
+    val config = Config.fromHoconFile(path).get
     assert(config.onTestFailure == expected)
   }