pw_presubmit: Support paths with spaces; run Bazel

- Split Git output by line instead of whitespace to support spaces in
  filenames.
- Run Bazel tests in the fast presubmit program.
- Use pw_cli.log for pigweed_presubmit.py.

Change-Id: I14ffdf8f41ba953fe39efa4b45e5639695964acc
diff --git a/pw_presubmit/py/pw_presubmit/pigweed_presubmit.py b/pw_presubmit/py/pw_presubmit/pigweed_presubmit.py
index d204427..7febdb1 100755
--- a/pw_presubmit/py/pw_presubmit/pigweed_presubmit.py
+++ b/pw_presubmit/py/pw_presubmit/pigweed_presubmit.py
@@ -508,6 +508,7 @@
     *CC,
     gn_clang_build,
     gn_arm_build,
+    *BAZEL,
     *python_checks.ALL,
 )
 
@@ -635,6 +636,13 @@
 
 
 if __name__ == '__main__':
-    # By default, display log messages like a simple print statement.
-    logging.basicConfig(format='%(message)s', level=logging.INFO)
+    try:
+        # If pw_cli is available, use it to initialize logs.
+        from pw_cli import log
+
+        log.install(logging.INFO)
+    except ImportError:
+        # If pw_cli isn't available, display log messages like a simple print.
+        logging.basicConfig(format='%(message)s', level=logging.INFO)
+
     sys.exit(main(**vars(argument_parser().parse_args())))
diff --git a/pw_presubmit/py/pw_presubmit/tools.py b/pw_presubmit/py/pw_presubmit/tools.py
index 3d05bf0..9517565 100644
--- a/pw_presubmit/py/pw_presubmit/tools.py
+++ b/pw_presubmit/py/pw_presubmit/tools.py
@@ -88,8 +88,8 @@
 
 def _git_ls_files(*args: PathOrStr, repo: PathOrStr = '.') -> List[str]:
     return [
-        os.path.abspath(os.path.join(repo, path))
-        for path in git_stdout('ls-files', '--', *args, repo=repo).split()
+        os.path.abspath(os.path.join(repo, path)) for path in git_stdout(
+            'ls-files', '--', *args, repo=repo).splitlines()
     ]
 
 
@@ -106,7 +106,7 @@
                                commit,
                                '--',
                                *paths,
-                               repo=repo).split()
+                               repo=repo).splitlines()
     ]