fix(core): correctly output created and update events for the watcher on macos (nrwl#18186)

Co-authored-by: FrozenPandaz <[email protected]>

Author: Cammisuli

packages/nx/src/native/tests/watcher.spec.ts

@@ -27,7 +27,7 @@ describe('watcher', () => {
   });
 
   it('should trigger the callback for files that are not ignored', (done) => {
-    watcher = new Watcher(realpathSync(temp.tempDir));
+    watcher = new Watcher(temp.tempDir);
     watcher.watch((error, paths) => {
       expect(paths).toMatchInlineSnapshot(`
         [
@@ -48,7 +48,7 @@ describe('watcher', () => {
   });
 
   it('should trigger the callback when files are updated', (done) => {
-    watcher = new Watcher(realpathSync(temp.tempDir));
+    watcher = new Watcher(temp.tempDir);
 
     watcher.watch((err, paths) => {
       expect(paths).toMatchInlineSnapshot(`
@@ -62,26 +62,30 @@ describe('watcher', () => {
       done();
     });
 
-    wait().then(() => {
+    wait(1000).then(() => {
       // nxignored file should not trigger a callback
       temp.appendFile('app2/main.js', 'update');
       temp.appendFile('app1/main.js', 'update');
     });
   });
 
   it('should watch file renames', (done) => {
-    watcher = new Watcher(realpathSync(temp.tempDir));
+    watcher = new Watcher(temp.tempDir);
 
     watcher.watch((err, paths) => {
       expect(paths.length).toBe(2);
-      expect(paths.find((p) => p.type === 'update')).toMatchObject({
-        path: 'app1/rename.js',
-        type: 'update',
-      });
-      expect(paths.find((p) => p.type === 'delete')).toMatchObject({
-        path: 'app1/main.js',
-        type: 'delete',
-      });
+      expect(paths.find((p) => p.type === 'create')).toMatchInlineSnapshot(`
+        {
+          "path": "app1/rename.js",
+          "type": "create",
+        }
+      `);
+      expect(paths.find((p) => p.type === 'delete')).toMatchInlineSnapshot(`
+        {
+          "path": "app1/main.js",
+          "type": "delete",
+        }
+      `);
       done();
     });
 
@@ -91,7 +95,7 @@ describe('watcher', () => {
   });
 
   it('should trigger on deletes', (done) => {
-    watcher = new Watcher(realpathSync(temp.tempDir));
+    watcher = new Watcher(temp.tempDir);
 
     watcher.watch((err, paths) => {
       expect(paths).toMatchInlineSnapshot(`
@@ -111,7 +115,7 @@ describe('watcher', () => {
   });
 
   it('should ignore nested gitignores', (done) => {
-    watcher = new Watcher(realpathSync(temp.tempDir));
+    watcher = new Watcher(temp.tempDir);
 
     watcher.watch((err, paths) => {
       expect(paths).toMatchInlineSnapshot(`
@@ -133,10 +137,10 @@ describe('watcher', () => {
   });
 });
 
-function wait() {
+function wait(timeout = 500) {
   return new Promise<void>((res) => {
     setTimeout(() => {
       res();
-    }, 500);
+    }, timeout);
   });
 }

packages/nx/src/native/watch/types.rs

@@ -1,7 +1,9 @@
 use napi::bindgen_prelude::*;
+
 use std::path::PathBuf;
 use tracing::trace;
-use watchexec_events::filekind::FileEventKind;
+use watchexec_events::filekind::ModifyKind::Name;
+use watchexec_events::filekind::RenameMode;
 use watchexec_events::{Event, Tag};
 
 #[napi(string_enum)]
@@ -67,11 +69,37 @@ impl From<&Event> for WatchEventInternal {
         let event_type = if matches!(path.1, None) && !path_ref.exists() {
             EventType::delete
         } else {
-            match event_kind {
-                FileEventKind::Create(_) => EventType::create,
-                FileEventKind::Modify(_) => EventType::update,
-                FileEventKind::Remove(_) => EventType::delete,
-                _ => EventType::update,
+            #[cfg(target_os = "macos")]
+            {
+                use std::fs;
+                use std::os::macos::fs::MetadataExt;
+
+                let t = fs::metadata(path_ref).expect("metadata should be available");
+
+                let modified_time = t.st_mtime();
+                let birth_time = t.st_birthtime();
+
+                // if a file is created and updated near the same time, we always get a create event
+                // so we need to check the timestamps to see if it was created or updated
+                // if the modified time is the same as birth_time then it was created
+                if modified_time == birth_time {
+                    EventType::create
+                } else {
+                    EventType::update
+                }
+            }
+
+            #[cfg(not(target_os = "macos"))]
+            {
+                use watchexec_events::filekind::FileEventKind;
+
+                match event_kind {
+                    FileEventKind::Create(_) => EventType::create,
+                    FileEventKind::Modify(Name(RenameMode::To)) => EventType::create,
+                    FileEventKind::Modify(Name(RenameMode::From)) => EventType::delete,
+                    FileEventKind::Modify(_) => EventType::update,
+                    _ => EventType::update,
+                }
             }
         };
 

packages/nx/src/native/watch/watch_config.rs

@@ -2,7 +2,6 @@ use crate::native::watch::utils::get_ignore_files;
 use crate::native::watch::watch_filterer::WatchFilterer;
 use ignore_files::IgnoreFilter;
 use std::sync::Arc;
-use std::time::Duration;
 use tracing::trace;
 use watchexec::config::RuntimeConfig;
 use watchexec_filterer_ignore::IgnoreFilterer;

packages/nx/src/native/watch/watcher.rs

@@ -5,7 +5,6 @@ use std::path::MAIN_SEPARATOR;
 use std::sync::Arc;
 
 use crate::native::watch::types::{EventType, WatchEvent, WatchEventInternal};
-use itertools::Itertools;
 use napi::bindgen_prelude::*;
 use napi::threadsafe_function::{
     ThreadSafeCallContext, ThreadsafeFunction, ThreadsafeFunctionCallMode,

packages/nx/src/utils/testing/temp-fs.ts

@@ -1,17 +1,17 @@
-import { basename, dirname, join } from 'path';
+import { dirname, join } from 'path';
 import { tmpdir } from 'os';
 import {
+  emptyDirSync,
+  mkdirpSync,
   mkdtempSync,
-  readFile,
   outputFile,
+  readFile,
+  realpathSync,
   rmSync,
-  emptyDirSync,
-  outputFileSync,
   unlinkSync,
-  mkdirpSync,
 } from 'fs-extra';
 import { joinPathFragments } from '../path';
-import { appendFileSync, writeFileSync, renameSync, existsSync } from 'fs';
+import { appendFileSync, existsSync, renameSync, writeFileSync } from 'fs';
 
 type NestedFiles = {
   [fileName: string]: string;
@@ -20,7 +20,7 @@ type NestedFiles = {
 export class TempFs {
   readonly tempDir: string;
   constructor(private dirname: string, overrideWorkspaceRoot = true) {
-    this.tempDir = mkdtempSync(join(tmpdir(), this.dirname));
+    this.tempDir = realpathSync(mkdtempSync(join(tmpdir(), this.dirname)));
     if (overrideWorkspaceRoot) {
       process.env.NX_WORKSPACE_ROOT_PATH = this.tempDir;
     }