fix(fs): fix panic due to unwrap & truncate by default (#847)

* fix(fs): fix panic due to unwrap & truncate by default

closes #846

* fmt and change file

.changes/fs-create-new.md

@@ -0,0 +1,6 @@
+---
+"fs": "patch"
+"fs-js": "patch"
+---
+
+Add `createNew` option for `writeFile` and `writeTextFile` to create the file if doesn't exist and fail if it does.

.changes/fs-trunacte-non-append.md

@@ -0,0 +1,6 @@
+---
+"fs": "patch"
+"fs-js": "patch"
+---
+
+Truncate files when using `writeFile` and `writeTextFile` with `append: false`.

.changes/fs-write-panic.md

@@ -0,0 +1,6 @@
+---
+"fs": "patch"
+"fs-js": "patch"
+---
+
+Fix panic when using `writeFile` or `writeTextFile` without passing an option object.

plugins/fs/guest-js/index.ts

@@ -980,6 +980,8 @@ interface WriteFileOptions {
   append?: boolean;
   /** Sets the option to allow creating a new file, if one doesn't already exist at the specified path (defaults to `true`). */
   create?: boolean;
+  /** Sets the option to create a new file, failing if it already exists. */
+  createNew?: boolean;
   /** File permissions. Ignored on Windows. */
   mode?: number;
   /** Base directory for `path` */
@@ -1023,7 +1025,7 @@ async function writeFile(
   *
   * await writeTextFile('file.txt', "Hello world", { dir: BaseDirectory.App });
   * ```
-  * 
+  *
   * @since 2.0.0
   */
 async function writeTextFile(

plugins/fs/src/commands.rs

@@ -579,11 +579,16 @@ pub fn write<R: Runtime>(
 }
 
 #[derive(Debug, Clone, Deserialize)]
+#[serde(rename_all = "camelCase")]
 pub struct WriteFileOptions {
     #[serde(flatten)]
     base: BaseOptions,
-    append: Option<bool>,
-    create: Option<bool>,
+    #[serde(default)]
+    append: bool,
+    #[serde(default)]
+    create: bool,
+    #[serde(default)]
+    create_new: bool,
     #[allow(unused)]
     mode: Option<u32>,
 }
@@ -597,18 +602,25 @@ fn write_file_inner<R: Runtime>(
     let resolved_path = resolve_path(&app, path, options.as_ref().and_then(|o| o.base.base_dir))?;
 
     let mut opts = std::fs::OpenOptions::new();
-    opts.append(options.as_ref().map(|o| o.append.unwrap_or(false)).unwrap());
-    opts.create(options.as_ref().map(|o| o.create.unwrap_or(true)).unwrap());
+    // defaults
+    opts.read(false).write(true).truncate(true).create(true);
 
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::OpenOptionsExt;
-        if let Some(Some(mode)) = options.map(|o| o.mode) {
-            opts.mode(mode & 0o777);
+    if let Some(options) = options {
+        #[cfg(unix)]
+        {
+            use std::os::unix::fs::OpenOptionsExt;
+            if let Some(mode) = options.mode {
+                opts.mode(mode);
+            }
         }
+
+        opts.create(options.create)
+            .append(options.append)
+            .truncate(!options.append)
+            .create_new(options.create_new);
     }
 
-    let mut file = opts.write(true).open(&resolved_path).map_err(|e| {
+    let mut file = opts.open(&resolved_path).map_err(|e| {
         format!(
             "failed to open file at path: {} with error: {e}",
             resolved_path.display()