Add --platform-info flag to CLI

noxfile.py

@@ -17,10 +17,34 @@ def tests(session):
 
     # print info
     session.run(
-        "python", "-m", "coverage", "run", "-m", "find_libpython", "--candidate-names"
+        "python",
+        "-m",
+        "coverage",
+        "run",
+        "-m",
+        "find_libpython",
+        "-v",
+        "--platform-info",
     )
     session.run(
-        "python", "-m", "coverage", "run", "-m", "find_libpython", "--candidate-paths"
+        "python",
+        "-m",
+        "coverage",
+        "run",
+        "-m",
+        "find_libpython",
+        "-v",
+        "--candidate-names",
+    )
+    session.run(
+        "python",
+        "-m",
+        "coverage",
+        "run",
+        "-m",
+        "find_libpython",
+        "-v",
+        "--candidate-paths",
     )
     session.run("python", "-m", "coverage", "run", "-m", "find_libpython", "-v")
 

src/find_libpython/__init__.py

@@ -342,11 +342,6 @@ def _finding_libpython():
     path : str
         Existing path to a libpython.
     """
-    _logger.debug("_is_windows = %s", _is_windows)
-    _logger.debug("_is_apple = %s", _is_apple)
-    _logger.debug("_is_mingw = %s", _is_mingw)
-    _logger.debug("_is_msys = %s", _is_cygwin)
-    _logger.debug("_is_posix = %s", _is_posix)
     for path in candidate_paths():
         _logger.debug("Candidate: %s", path)
         normalized = _normalize_path(path)
@@ -391,13 +386,23 @@ def _cli_find_libpython(cli_op, verbose):
         _print_all(candidate_names())
     elif cli_op == "candidate-paths":
         _print_all(p for p in candidate_paths() if p and os.path.isabs(p))
+    elif cli_op == "platform-info":
+        _log_platform_info()
     else:
         path = find_libpython()
         if path is None:
             return 1
         print(path, end="")
 
 
+def _log_platform_info():
+    _logger.debug("_is_windows = %s", _is_windows)
+    _logger.debug("_is_apple = %s", _is_apple)
+    _logger.debug("_is_mingw = %s", _is_mingw)
+    _logger.debug("_is_msys = %s", _is_cygwin)
+    _logger.debug("_is_posix = %s", _is_posix)
+
+
 def main(args=None):
     import argparse
 
@@ -432,6 +437,13 @@ def main(args=None):
         const="candidate-paths",
         help="Print list of candidate paths of libpython.",
     )
+    group.add_argument(
+        "--platform-info",
+        action="store_const",
+        dest="cli_op",
+        const="platform-info",
+        help="Print information about the platform and exit.",
+    )
 
     ns = parser.parse_args(args)
     parser.exit(_cli_find_libpython(**vars(ns)))