Honor verbose flag when building shaders

kitty/shaders/slang.py

@@ -843,6 +843,7 @@ def main() -> None:
     if not shutil.which(slangc()[0]):
         raise SystemExit(f'The shader slang compiler ({slangc()[0]}) not in PATH: {os.environ.get("PATH")}')
     setup = runpy.run_path('setup.py')
+    verbose = sys.argv[-3] == 'verbose'
     Command = setup['Command']
     parallel_run = setup['parallel_run']
     emphasis = setup['emphasis']
@@ -854,7 +855,7 @@ def main() -> None:
             if needs_build:
                 desc = re.sub(r'\|(.+?)\|', lambda m: emphasis(m.group(1)), desc)
                 needed.append(Command(desc, cmd, lambda: True))
-        parallel_run(needed)
+        parallel_run(needed, verbose)
 
     compile_builtin_shaders(sys.argv[-2], sys.argv[-1], prun)
 

setup.py

@@ -990,7 +990,7 @@ def dependecies_for(src: str, obj: str, all_headers: Iterable[str]) -> Iterable[
                     yield path
 
 
-def parallel_run(items: List[Command]) -> None:
+def parallel_run(items: List[Command], verbose: bool = verbose) -> None:
     try:
         num_workers = max(2, os.cpu_count() or 1)
     except Exception:
@@ -1395,6 +1395,7 @@ def build_shaders(args: Options, kitty_exe: str, for_freeze: bool) -> None:
             kitty_exe,
             '+launch',
             os.path.join(src_base, 'kitty/shaders/slang.py'),
+            'verbose' if verbose else '',
             'build/shaders',
             'shaders',
         ],