scripts: add "clippy" internal tool

Similar to the "ninja scan-build" target for C, add a clippy internal
tool that runs clippy-driver on all crates in the project.

The approach used is more efficient than with "ninja scan-build", and
does not require rerunning Meson in a separate build directory; it
uses the introspection data to find the compiler arguments for the
target and invokes clippy-driver with a slightly modified command
line.

This could actually be applied to scan-build as well, reusing the
run_tool_on_targets() function.

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

1 files changed, 10 insertions, 0 deletions

diff --git a/mesonbuild/scripts/run_tool.py b/mesonbuild/scripts/run_tool.py
index bccc4cb83..e206ff7fe 100644
--- a/mesonbuild/scripts/run_tool.py
+++ b/mesonbuild/scripts/run_tool.py
@@ -6,6 +6,7 @@ from __future__ import annotations
 import asyncio.subprocess
 import fnmatch
 import itertools
+import json
 import signal
 import sys
 from pathlib import Path
@@ -126,3 +127,12 @@ def run_clang_tool(name: str, srcdir: Path, builddir: Path, fn: T.Callable[...,
     def wrapper(path: Path) -> T.Iterable[T.Coroutine[None, None, int]]:
         yield fn(path, *args)
     return asyncio.run(_run_workers(all_clike_files(name, srcdir, builddir), wrapper))
+
+def run_tool_on_targets(fn: T.Callable[[T.Dict[str, T.Any]],
+                                       T.Iterable[T.Coroutine[None, None, int]]]) -> int:
+    if sys.platform == 'win32':
+        asyncio.set_event_loop_policy(asyncio.WindowsProactorEventLoopPolicy())
+
+    with open('meson-info/intro-targets.json', encoding='utf-8') as fp:
+        targets = json.load(fp)
+    return asyncio.run(_run_workers(targets, fn))