Add support to locate artefacts from nested paths

Trying to access a download artefact from a page other than the root
would fail to resolve the correct artefact path. This change adds
support to resolve the correct path from any page the user is located
on.

Add unit tests to confirm this feature works as expected, and also to
ensure artefacts are found correctly when the project name contains
spaces and variable casing.

sphinx_multiversion/sphinx.py

@@ -157,7 +157,12 @@ def apathto(self, build_target_name, build_target):
         """Find the path to the artefact identified by build_target_name
         and build_target.
         """
-        artefact_dir = "artefacts"
+        current_version = self.metadata[self.current_version_name]
+        current_outputroot = os.path.abspath(current_version["outputdir"])
+        artefact_dir = posixpath.join(current_outputroot, "artefacts")
+        current_outputdir = posixpath.dirname(
+            posixpath.join(current_outputroot, self.context["pagename"])
+        )
 
         filename = "{project}_docs-{version}".format(
             project=self.app.config.project.replace(" ", ""),
@@ -175,8 +180,9 @@ def apathto(self, build_target_name, build_target):
                 f=filename,
                 extension=build_target["download_format"],
             )
-        artefact_path = posixpath.join(artefact_dir, filename)
-
+        artefact_path = posixpath.relpath(
+            posixpath.join(artefact_dir, filename), start=current_outputdir
+        )
         return artefact_path
 
 

tests/test_sphinx.py

@@ -160,15 +160,48 @@ def test_apathto(self):
         )
         self.assertEqual(
             self.versioninfo.apathto("PDF", build_targets["PDF"]),
-            "artefacts/example_docs-master.pdf",
+            posixpath.join("artefacts", "example_docs-master.pdf"),
         )
 
-        mock_versioninfo = self.versioninfo
-        mock_versioninfo.current_version_name = "branch-with/slash"
+        self.versioninfo.context["pagename"] = "appendix/faq"
+        self.assertEqual(
+            self.versioninfo.apathto("PDF", build_targets["PDF"]),
+            posixpath.join("..", "artefacts", "example_docs-master.pdf"),
+        )
 
-        self.versioninfo = Mock()
-        self.versioninfo = mock_versioninfo
+        self.versioninfo.context["pagename"] = "testpage"
+        self.versioninfo.current_version_name = "branch-with/slash"
+        #        mock_versioninfo = self.versioninfo
+        #        mock_versioninfo.current_version_name = "branch-with/slash"
+        #
+        #        self.versioninfo = Mock()
+        #        self.versioninfo = mock_versioninfo
+        self.assertEqual(
+            self.versioninfo.apathto("PDF", build_targets["PDF"]),
+            posixpath.join("artefacts", "example_docs-branch-with-slash.pdf"),
+        )
+        self.assertEqual(
+            self.versioninfo.apathto("HTML", build_targets["HTML"]),
+            posixpath.join(
+                "artefacts", "example_docs-branch-with-slash-HTML.zip"
+            ),
+        )
+
+        self.versioninfo.app.config.project = (
+            "Project Name with Spaces and VaRiAbLe case"
+        )
+        self.versioninfo.current_version_name = "master"
+        self.assertEqual(
+            self.versioninfo.apathto("HTML", build_targets["HTML"]),
+            posixpath.join(
+                "artefacts",
+                "ProjectNamewithSpacesandVaRiAbLecase_docs-master-HTML.zip",
+            ),
+        )
         self.assertEqual(
             self.versioninfo.apathto("PDF", build_targets["PDF"]),
-            "artefacts/example_docs-branch-with-slash.pdf",
+            posixpath.join(
+                "artefacts",
+                "ProjectNamewithSpacesandVaRiAbLecase_docs-master.pdf",
+            ),
         )