scripts: convert run_tool to asyncio

This improves the handling of keyboard interrupt, and also makes it easy to
buffer the output and not mix errors from different subprocesses.  This
is useful for clang-tidy and will be used by clippy as well.  In addition,
the new code supports MESON_NUM_PROCESSES.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/mesonbuild/scripts/clangtidy.py b/mesonbuild/scripts/clangtidy.py
index ab53bbd39..550faeef3 100644
--- a/mesonbuild/scripts/clangtidy.py
+++ b/mesonbuild/scripts/clangtidy.py
@@ -11,17 +11,17 @@ import os
 import shutil
 import sys
 
-from .run_tool import run_clang_tool
+from .run_tool import run_clang_tool, run_with_buffered_output
 from ..environment import detect_clangtidy, detect_clangapply
 import typing as T
 
-def run_clang_tidy(fname: Path, tidyexe: list, builddir: Path, fixesdir: T.Optional[Path]) -> subprocess.CompletedProcess:
+async def run_clang_tidy(fname: Path, tidyexe: list, builddir: Path, fixesdir: T.Optional[Path]) -> int:
     args = []
     if fixesdir is not None:
         handle, name = tempfile.mkstemp(prefix=fname.name + '.', suffix='.yaml', dir=fixesdir)
         os.close(handle)
         args.extend(['-export-fixes', name])
-    return subprocess.run(tidyexe + args + ['-quiet', '-p', str(builddir), str(fname)])
+    return await run_with_buffered_output(tidyexe + args + ['-quiet', '-p', str(builddir), str(fname)])
 
 def run(args: T.List[str]) -> int:
     parser = argparse.ArgumentParser()