Fixes for ansible-test sanity import test. (#45249)

* Fix import test on Python 3.7.
* Fix path processing in import sanity test.

(cherry picked from commit 6fb333faff)

test/sanity/import/importer.py

@@ -4,12 +4,18 @@
 from __future__ import absolute_import, print_function
 
 import contextlib
-import imp
 import os
 import re
 import sys
 import traceback
 
+try:
+    import importlib.util
+    imp = None
+except ImportError:
+    importlib = None
+    import imp
+
 try:
     from StringIO import StringIO
 except ImportError:
@@ -76,10 +82,18 @@ def test_python_module(path, base_dir, messages, ansible_module):
         filter_dir = base_dir
 
     capture = Capture()
+
     try:
-        with open(path, 'r') as module_fd:
+        if imp:
+            with open(path, 'r') as module_fd:
+                with capture_output(capture):
+                    imp.load_module(name, module_fd, os.path.abspath(path), ('.py', 'r', imp.PY_SOURCE))
+        else:
+            spec = importlib.util.spec_from_file_location(name, os.path.abspath(path))
+            module = importlib.util.module_from_spec(spec)
+
             with capture_output(capture):
-                imp.load_module(name, module_fd, os.path.abspath(path), ('.py', 'r', imp.PY_SOURCE))
+                spec.loader.exec_module(module)
 
         capture_report(path, capture, messages)
     except ImporterAnsibleModuleException:
@@ -95,29 +109,29 @@ def test_python_module(path, base_dir, messages, ansible_module):
         line = 0
         offset = 0
 
-        for result in results:
-            if result[0].startswith(filter_dir):
-                source = result[0][len(base_dir) + 1:].replace('test/sanity/import/', '')
-                line = result[1] or 0
-                break
-
-        if not source:
-            # If none of our source files are found in the traceback, report the file we were testing.
-            # I haven't been able to come up with a test case that encounters this issue yet.
+        if isinstance(ex, SyntaxError) and ex.filename.endswith(path):  # pylint: disable=locally-disabled, no-member
+            # A SyntaxError in the source we're importing will have the correct path, line and offset.
+            # However, the traceback will report the path to this importer.py script instead.
+            # We'll use the details from the SyntaxError in this case, as it's more accurate.
             source = path
-            message += ' (in %s:%d)' % (results[-1][0], results[-1][1] or 0)
-        elif isinstance(ex, SyntaxError):
-            if ex.filename.endswith(path):  # pylint: disable=locally-disabled, no-member
-                # A SyntaxError in the source we're importing will have the correct path, line and offset.
-                # However, the traceback will report the path to this importer.py script instead.
-                # We'll use the details from the SyntaxError in this case, as it's more accurate.
+            line = ex.lineno or 0  # pylint: disable=locally-disabled, no-member
+            offset = ex.offset or 0  # pylint: disable=locally-disabled, no-member
+            message = str(ex)
+
+            # Hack to remove the filename and line number from the message, if present.
+            message = message.replace(' (%s, line %d)' % (os.path.basename(path), line), '')
+        else:
+            for result in results:
+                if result[0].startswith(filter_dir):
+                    source = result[0][len(base_dir) + 1:].replace('test/sanity/import/', '')
+                    line = result[1] or 0
+                    break
+
+            if not source:
+                # If none of our source files are found in the traceback, report the file we were testing.
+                # I haven't been able to come up with a test case that encounters this issue yet.
                 source = path
-                line = ex.lineno or 0  # pylint: disable=locally-disabled, no-member
-                offset = ex.offset or 0  # pylint: disable=locally-disabled, no-member
-                message = str(ex)
-
-                # Hack to remove the filename and line number from the message, if present.
-                message = message.replace(' (%s, line %d)' % (os.path.basename(path), line), '')
+                message += ' (in %s:%d)' % (results[-1][0], results[-1][1] or 0)
 
         message = re.sub(r'\n *', ': ', message)
         error = '%s:%d:%d: %s: %s' % (source, line, offset, exc_type.__name__, message)