1 files changed, 90 insertions, 0 deletions
diff --git a/okio/src/wasmMain/kotlin/okio/FileSystem.kt b/okio/src/wasmMain/kotlin/okio/FileSystem.kt
new file mode 100644
index 00000000..2152a91b
--- /dev/null
+++ b/okio/src/wasmMain/kotlin/okio/FileSystem.kt
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2023 Square, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package okio
+
+import okio.Path.Companion.toPath
+import okio.internal.commonCopy
+import okio.internal.commonCreateDirectories
+import okio.internal.commonDeleteRecursively
+import okio.internal.commonExists
+import okio.internal.commonListRecursively
+import okio.internal.commonMetadata
+
+actual abstract class FileSystem {
+  actual abstract fun canonicalize(path: Path): Path
+
+  actual fun metadata(path: Path): FileMetadata = commonMetadata(path)
+
+  actual abstract fun metadataOrNull(path: Path): FileMetadata?
+
+  actual fun exists(path: Path): Boolean = commonExists(path)
+
+  actual abstract fun list(dir: Path): List<Path>
+
+  actual abstract fun listOrNull(dir: Path): List<Path>?
+
+  actual open fun listRecursively(dir: Path, followSymlinks: Boolean): Sequence<Path> =
+    commonListRecursively(dir, followSymlinks)
+
+  actual abstract fun openReadOnly(file: Path): FileHandle
+
+  actual abstract fun openReadWrite(
+    file: Path,
+    mustCreate: Boolean,
+    mustExist: Boolean,
+  ): FileHandle
+
+  actual abstract fun source(file: Path): Source
+
+  actual inline fun <T> read(file: Path, readerAction: BufferedSource.() -> T): T {
+    return source(file).buffer().use {
+      it.readerAction()
+    }
+  }
+
+  actual abstract fun sink(file: Path, mustCreate: Boolean): Sink
+
+  actual inline fun <T> write(
+    file: Path,
+    mustCreate: Boolean,
+    writerAction: BufferedSink.() -> T,
+  ): T {
+    return sink(file, mustCreate).buffer().use {
+      it.writerAction()
+    }
+  }
+
+  actual abstract fun appendingSink(file: Path, mustExist: Boolean): Sink
+
+  actual abstract fun createDirectory(dir: Path, mustCreate: Boolean)
+
+  actual fun createDirectories(dir: Path, mustCreate: Boolean): Unit = commonCreateDirectories(dir, mustCreate)
+
+  actual abstract fun atomicMove(source: Path, target: Path)
+
+  actual open fun copy(source: Path, target: Path): Unit = commonCopy(source, target)
+
+  actual abstract fun delete(path: Path, mustExist: Boolean)
+
+  actual open fun deleteRecursively(fileOrDirectory: Path, mustExist: Boolean): Unit =
+    commonDeleteRecursively(fileOrDirectory, mustExist)
+
+  actual abstract fun createSymlink(source: Path, target: Path)
+
+  actual companion object {
+    actual val SYSTEM_TEMPORARY_DIRECTORY: Path = "/tmp".toPath()
+  }
+}