health-check: Add option to run only some checks

The default is still to run all of them, but this will allow us to run
checks in separate luci steps to provide an easier to read result.

BUG=b:233913455
TEST=./tools/health-check python fmt

Change-Id: Iddc803f8f423db36ece53a13acfe564560b789a6
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3668812
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>

tools/health-check

@@ -5,8 +5,9 @@
 
 import doctest
 import importlib
-from pathlib import Path
+import argh  # type: ignore
 import sys
+from pathlib import Path
 from impl.common import CROSVM_ROOT, run_main, cmd, chdir, parallel, find_scripts
 from impl.check_code_hygiene import has_crlf_line_endings
 
@@ -35,13 +36,24 @@ def check_crlf_line_endings():
         sys.exit(-1)
 
 
-def main():
+@argh.arg("checks", choices=["python", "misc", "fmt", "clippy", "all", []])
+def main(*checks: str):
     chdir(CROSVM_ROOT)
 
-    check_python()
-    check_crlf_line_endings()
-    cmd("./tools/fmt --check").fg()
-    cmd("./tools/clippy").fg()
+    if not checks:
+        checks = ("all",)
+
+    def should_check(name: str):
+        return "all" in checks or name in checks
+
+    if should_check("python"):
+        check_python()
+    if should_check("misc"):
+        check_crlf_line_endings()
+    if should_check("fmt"):
+        cmd("./tools/fmt --check").fg()
+    if should_check("clippy"):
+        cmd("./tools/clippy").fg()
 
 
 if __name__ == "__main__":