Fix links from docs in folders (#15)

Author: felix-hilden

docs/src/release_notes.rst

@@ -11,6 +11,7 @@ sphinx-codeautolink adheres to
 Unreleased
 ----------
 - Correctly filter out names from concatenated sources (:issue:`14`)
+- Fix links in documents inside folder (:issue:`15`)
 
 0.1.0 (2021-09-22)
 ------------------

src/sphinx_codeautolink/extension/__init__.py

@@ -83,8 +83,7 @@ def apply_links(self, app, exception):
         if self.do_nothing or exception is not None:
             return
 
-        uri = app.builder.outdir
-        inv_file = posixpath.join(uri, INVENTORY_FILENAME)
+        inv_file = posixpath.join(app.outdir, INVENTORY_FILENAME)
         if not Path(inv_file).exists():
             msg = (
                 'sphinx-codeautolink: cannot locate object inventory '
@@ -93,16 +92,16 @@ def apply_links(self, app, exception):
             warn(msg, RuntimeWarning)
             return
 
-        inv = fetch_inventory(app, uri, inv_file)
+        inv = fetch_inventory(app, app.outdir, inv_file)
         inter_inv = InventoryAdapter(app.env).main_inventory
-        transposed = transpose_inventory(inter_inv, relative_to=uri)
-        transposed.update(transpose_inventory(inv, relative_to=uri))
+        transposed = transpose_inventory(inter_inv, relative_to=app.outdir)
+        transposed.update(transpose_inventory(inv, relative_to=app.outdir))
 
         for visitor in self.block_visitors:
             if not visitor.source_transforms:
                 continue
-            file = Path(uri) / (visitor.current_document + '.html')
-            link_html(file, visitor.source_transforms, transposed)
+            file = Path(app.outdir) / (visitor.current_document + '.html')
+            link_html(file, app.outdir, visitor.source_transforms, transposed)
 
         refs_file = Path(app.srcdir) / self.code_refs_file
         refs = {}

src/sphinx_codeautolink/extension/block.py

@@ -161,14 +161,17 @@ def visit_literal_block(self, node: nodes.literal_block):
         self.source_transforms.append(transforms)
 
 
-def link_html(document: Path, transforms: List[SourceTransforms], inventory: dict):
+def link_html(
+    document: Path, out_dir: str, transforms: List[SourceTransforms], inventory: dict
+):
     """Inject links to code blocks on disk."""
     text = document.read_text('utf-8')
     soup = BeautifulSoup(text, 'html.parser')
     blocks = soup.find_all('div', attrs={'class': 'highlight-python notranslate'})
     inners = [block.select('div > pre')[0] for block in blocks]
 
-    link_pattern = '<a href="{link}" title="{title}">{text}</a>'
+    up_lvls = len(document.relative_to(out_dir).parents) - 1
+    link_pattern = '<a href="' + '../' * up_lvls + '{link}" title="{title}">{text}</a>'
     name_pattern = '<span class="n">{name}</span>'
     period = '<span class="o">.</span>'