Fix shebangs and file modes and update tests. (#40563)

* Add execute bit sanity test and apply fixes.
* Add shebang test for `lib` dirs and apply fixes.
* Shebang and execute bit cleanup.

test/sanity/code-smell/shebang.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 
 import os
+import stat
 import sys
 
 
@@ -24,7 +25,6 @@ def main():
     }
 
     skip = set([
-        'hacking/cherrypick.py',
         'test/integration/targets/win_module_utils/library/legacy_only_new_way_win_line_ending.ps1',
         'test/integration/targets/win_module_utils/library/legacy_only_old_way_win_line_ending.ps1',
     ])
@@ -35,17 +35,27 @@ def main():
 
         with open(path, 'rb') as path_fd:
             shebang = path_fd.readline().strip()
+            mode = os.stat(path).st_mode
+            executable = (stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH) & mode
 
-            if not shebang:
-                continue
+            if not shebang or not shebang.startswith(b'#!'):
+                if executable:
+                    print('%s:%d:%d: file without shebang should not be executable' % (path, 0, 0))
 
-            if not shebang.startswith(b'#!'):
                 continue
 
             is_module = False
 
             if path.startswith('lib/ansible/modules/'):
                 is_module = True
+            elif path.startswith('lib/') or path.startswith('test/runner/lib/'):
+                if executable:
+                    print('%s:%d:%d: should not be executable' % (path, 0, 0))
+
+                if shebang:
+                    print('%s:%d:%d: should not have a shebang' % (path, 0, 0))
+
+                continue
             elif path.startswith('test/integration/targets/'):
                 dirname = os.path.dirname(path)
 
@@ -57,6 +67,9 @@ def main():
                     is_module = True
 
             if is_module:
+                if executable:
+                    print('%s:%d:%d: module should not be executable' % (path, 0, 0))
+
                 ext = os.path.splitext(path)[1]
                 expected_shebang = module_shebangs.get(ext)
                 expected_ext = ' or '.join(['"%s"' % k for k in module_shebangs])