Fix ansible-test coverage exporting.

changelogs/fragments/ansible-test-fix-coverage-export.yml

@@ -0,0 +1,6 @@
+bugfixes:
+  - ansible-test - The ``--export`` option for ``ansible-test coverage`` is now limited to the ``combine`` command.
+                   It was previously available for reporting commands on which it had no effect.
+  - ansible-test - The ``ansible-test coverage combine`` option ``--export`` now exports relative paths.
+                   This avoids loss of coverage data when aggregating across systems with different absolute paths.
+                   Paths will be converted back to absolute when generating reports.

test/lib/ansible_test/_internal/cli.py

@@ -576,6 +576,9 @@ def key_value_type(value):  # type: (str) -> t.Tuple[str, str]
     coverage_combine.set_defaults(func=command_coverage_combine,
                                   config=CoverageConfig)
 
+    coverage_combine.add_argument('--export',
+                                  help='directory to export combined coverage files to')
+
     add_extra_coverage_options(coverage_combine)
 
     coverage_erase = coverage_subparsers.add_parser('erase',
@@ -986,9 +989,6 @@ def add_extra_coverage_options(parser):
                         action='store_true',
                         help='generate empty report of all python/powershell source files')
 
-    parser.add_argument('--export',
-                        help='directory to export combined coverage files to')
-
 
 def add_httptester_options(parser, argparse):
     """

test/lib/ansible_test/_internal/coverage/__init__.py

@@ -288,6 +288,8 @@ def sanitize_filename(
         display.info('%s -> %s' % (filename, new_name), verbosity=3)
         filename = new_name
 
+    filename = os.path.abspath(filename)  # make sure path is absolute (will be relative if previously exported)
+
     return filename
 
 

test/lib/ansible_test/_internal/coverage/combine.py

@@ -79,6 +79,9 @@ def _command_coverage_combine_python(args):
             continue
 
         for filename, arcs in enumerate_python_arcs(coverage_file, coverage, modules, collection_search_re, collection_sub_re):
+            if args.export:
+                filename = os.path.relpath(filename)  # exported paths must be relative since absolute paths may differ between systems
+
             if group not in groups:
                 groups[group] = {}
 
@@ -157,6 +160,9 @@ def _default_stub_value(lines):
             continue
 
         for filename, hits in enumerate_powershell_lines(coverage_file, collection_search_re, collection_sub_re):
+            if args.export:
+                filename = os.path.relpath(filename)  # exported paths must be relative since absolute paths may differ between systems
+
             if group not in groups:
                 groups[group] = {}