1 files changed, 57 insertions, 0 deletions
diff --git a/sphinx/environment/collectors/dependencies.py b/sphinx/environment/collectors/dependencies.py
new file mode 100644
index 0000000..df1f0c1
--- /dev/null
+++ b/sphinx/environment/collectors/dependencies.py
@@ -0,0 +1,57 @@
+"""The dependencies collector components for sphinx.environment."""
+
+from __future__ import annotations
+
+import os
+from os import path
+from typing import TYPE_CHECKING, Any
+
+from docutils.utils import relative_path
+
+from sphinx.environment.collectors import EnvironmentCollector
+from sphinx.util.osutil import fs_encoding
+
+if TYPE_CHECKING:
+    from docutils import nodes
+
+    from sphinx.application import Sphinx
+    from sphinx.environment import BuildEnvironment
+
+
+class DependenciesCollector(EnvironmentCollector):
+    """dependencies collector for sphinx.environment."""
+
+    def clear_doc(self, app: Sphinx, env: BuildEnvironment, docname: str) -> None:
+        env.dependencies.pop(docname, None)
+
+    def merge_other(self, app: Sphinx, env: BuildEnvironment,
+                    docnames: set[str], other: BuildEnvironment) -> None:
+        for docname in docnames:
+            if docname in other.dependencies:
+                env.dependencies[docname] = other.dependencies[docname]
+
+    def process_doc(self, app: Sphinx, doctree: nodes.document) -> None:
+        """Process docutils-generated dependency info."""
+        cwd = os.getcwd()
+        frompath = path.join(path.normpath(app.srcdir), 'dummy')
+        deps = doctree.settings.record_dependencies
+        if not deps:
+            return
+        for dep in deps.list:
+            # the dependency path is relative to the working dir, so get
+            # one relative to the srcdir
+            if isinstance(dep, bytes):
+                dep = dep.decode(fs_encoding)
+            relpath = relative_path(frompath,
+                                    path.normpath(path.join(cwd, dep)))
+            app.env.dependencies[app.env.docname].add(relpath)
+
+
+def setup(app: Sphinx) -> dict[str, Any]:
+    app.add_env_collector(DependenciesCollector)
+
+    return {
+        'version': 'builtin',
+        'parallel_read_safe': True,
+        'parallel_write_safe': True,
+    }