Add unix-only mode for FileInfo (#732)

js/stat.ts

@@ -8,6 +8,7 @@ import { assert } from "./util";
  * A FileInfo describes a file and is returned by `stat`, `lstat`,
  * `statSync`, `lstatSync`.
  */
+// TODO FileInfo should be an interface not a class.
 export class FileInfo {
   private readonly _isFile: boolean;
   private readonly _isSymlink: boolean;
@@ -31,12 +32,18 @@ export class FileInfo {
    * be available on all platforms.
    */
   created: number | null;
+  /**
+   * The underlying raw st_mode bits that contain the standard Unix permissions
+   * for this file/directory. TODO Match behavior with Go on windows for mode.
+   */
+  mode: number | null;
 
   /* @internal */
   constructor(private _msg: fbs.StatRes) {
     const modified = this._msg.modified().toFloat64();
     const accessed = this._msg.accessed().toFloat64();
     const created = this._msg.created().toFloat64();
+    const mode = this._msg.mode(); // negative for invalid mode (Windows)
 
     this._isFile = this._msg.isFile();
     this._isSymlink = this._msg.isSymlink();
@@ -44,6 +51,7 @@ export class FileInfo {
     this.modified = modified ? modified : null;
     this.accessed = accessed ? accessed : null;
     this.created = created ? created : null;
+    this.mode = mode >= 0 ? mode : null; // null if invalid mode (Windows)
   }
 
   /**

src/handlers.rs

@@ -15,6 +15,8 @@ use msg;
 use remove_dir_all::remove_dir_all;
 use std;
 use std::fs;
+#[cfg(any(unix))]
+use std::os::unix::fs::PermissionsExt;
 use std::path::Path;
 use std::time::UNIX_EPOCH;
 use std::time::{Duration, Instant};
@@ -504,6 +506,16 @@ macro_rules! to_seconds {
   }};
 }
 
+#[cfg(any(unix))]
+fn get_mode(perm: fs::Permissions) -> i32 {
+  (perm.mode() as i32)
+}
+
+#[cfg(not(any(unix)))]
+fn get_mode(_perm: fs::Permissions) -> i32 {
+  -1
+}
+
 fn handle_stat(_d: *const DenoC, base: &msg::Base) -> Box<Op> {
   let msg = base.msg_as_stat().unwrap();
   let cmd_id = base.cmd_id();
@@ -529,6 +541,7 @@ fn handle_stat(_d: *const DenoC, base: &msg::Base) -> Box<Op> {
         modified: to_seconds!(metadata.modified()),
         accessed: to_seconds!(metadata.accessed()),
         created: to_seconds!(metadata.created()),
+        mode: get_mode(metadata.permissions()),
         ..Default::default()
       },
     );

src/msg.fbs

@@ -211,6 +211,8 @@ table StatRes {
   modified:ulong;
   accessed:ulong;
   created:ulong;
+  mode: int = -1;
+  // negative mode for invalid (Windows); default to invalid
 }
 
 root_type Base;