Wrap exit codes imports in try-except block

Fix ImportError on non-Unix platforms

Author: m-aciek

build_docs.py

@@ -28,7 +28,7 @@
 import logging
 import logging.handlers
 from functools import total_ordering
-from os import readlink, EX_OK, EX_SOFTWARE
+from os import readlink
 import re
 import shlex
 import shutil
@@ -48,6 +48,11 @@
 
 HERE = Path(__file__).resolve().parent
 
+try:
+    from os import EX_OK, EX_SOFTWARE
+except ImportError:
+    EX_OK, EX_SOFTWARE = 0, 1
+
 try:
     import sentry_sdk
 except ImportError:
@@ -785,14 +790,15 @@ def build(self):
         sphinxbuild = self.venv / "bin" / "sphinx-build"
         blurb = self.venv / "bin" / "blurb"
         # Disable cpython switchers, we handle them now:
-        run(
-            [
-                "sed",
-                "-i",
-                "s/ *-A switchers=1//",
-                self.checkout / "Doc" / "Makefile",
-            ]
-        )
+        if self.version.as_tuple() <= (3, 7):
+            run(
+                [
+                    "sed",
+                    "-i",
+                    "s/ *-A switchers=1//",
+                    f"'{self.checkout / 'Doc' / 'Makefile'}'",
+                ]
+            )
         self.version.setup_indexsidebar(
             self.checkout / "Doc" / "tools" / "templates" / "indexsidebar.html"
         )
@@ -1053,6 +1059,8 @@ def main() -> bool:
     languages_dict = {language.tag: language for language in LANGUAGES}
     versions = Version.filter(VERSIONS, args.branch)
     languages = [languages_dict[tag] for tag in args.languages]
+    if not versions:
+        raise ValueError(f"Branch/version {args.branch} not found")
     del args.languages
     del args.branch
     todo = list(product(versions, languages))