Update

leenkx/blender/lnx/utils.py

@@ -52,6 +52,46 @@ class WorkingDir:
     def __exit__(self, exc_type, exc_val, exc_tb):
         os.chdir(self.prev_cwd)
 
+def write_if_changed(filepath, content):
+    """Write content to filepath only if it differs from existing file preserving mtime when unchanged"""
+    if os.path.isfile(filepath):
+        with open(filepath, 'r') as f:
+            if f.read() == content:
+                return False
+    with open(filepath, 'w') as f:
+        f.write(content)
+    return True
+
+def find_browser():
+    """Find a browser that supports file:// with --allow-file-access-from-files - Chrome/Chromium/Edge"""
+    osn = get_os()
+    if osn == 'win':
+        candidates = []
+        for p in (os.environ.get('PROGRAMFILES', ''), os.environ.get('PROGRAMFILES(X86)', ''), os.environ.get('LOCALAPPDATA', '')):
+            if p:
+                candidates.append(os.path.join(p, 'Google', 'Chrome', 'Application', 'chrome.exe'))
+                candidates.append(os.path.join(p, 'Google', 'Chrome', 'chrome.exe'))
+                candidates.append(os.path.join(p, 'Google', 'Chromium', 'chrome.exe'))
+                candidates.append(os.path.join(p, 'Chromium', 'Application', 'chrome.exe'))
+        for p in (os.environ.get('PROGRAMFILES(X86)', ''), os.environ.get('PROGRAMFILES', '')):
+            if p:
+                candidates.append(os.path.join(p, 'Microsoft', 'Edge', 'Application', 'msedge.exe'))
+        for c in candidates:
+            if os.path.isfile(c):
+                return c
+    elif osn == 'mac':
+        for app in ('/Applications/Google Chrome.app/Contents/MacOS/Google Chrome',
+                     '/Applications/Chromium.app/Contents/MacOS/Chromium',
+                     '/Applications/Microsoft Edge.app/Contents/MacOS/Microsoft Edge'):
+            if os.path.isfile(app):
+                return app
+    else:
+        for name in ('google-chrome', 'google-chrome-stable', 'chromium', 'chromium-browser', 'microsoft-edge'):
+            found = shutil.which(name)
+            if found:
+                return found
+    return None
+
 def write_lnx(filepath, output):
     if filepath.endswith('.lz4'):
         with open(filepath, 'wb') as f:
@@ -279,7 +319,7 @@ def get_khamake_threads() -> int:
     addon_prefs = get_lnx_preferences()
     if hasattr(addon_prefs, 'khamake_threads_use_auto') and addon_prefs.khamake_threads_use_auto:
         return -1
-    return 1 if not hasattr(addon_prefs, 'khamake_threads') else addon_prefs.khamake_threads
+    return -1 if not hasattr(addon_prefs, 'khamake_threads') else addon_prefs.khamake_threads
 
 def get_compilation_server():
     addon_prefs = get_lnx_preferences()