masonry: write PEP 610 metadata for editable builds

src/poetry/masonry/builders/editable.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import hashlib
+import json
 import os
 import shutil
 
@@ -241,6 +242,18 @@ def _add_dist_info(self, added_files: list[Path]) -> None:
 
             added_files.append(dist_info.joinpath("entry_points.txt"))
 
+        # write PEP 610 metadata
+        direct_url_json = dist_info.joinpath("direct_url.json")
+        direct_url_json.write_text(
+            json.dumps(
+                {
+                    "dir_info": {"editable": True},
+                    "url": self._poetry.file.path.parent.as_uri(),
+                }
+            )
+        )
+        added_files.append(direct_url_json)
+
         record = dist_info.joinpath("RECORD")
         with record.open("w", encoding="utf-8") as f:
             for path in added_files:

tests/masonry/builders/test_editable_builder.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import json
 import os
 import shutil
 
@@ -9,6 +10,7 @@
 import pytest
 
 from cleo.io.null_io import NullIO
+from deepdiff import DeepDiff
 
 from poetry.factory import Factory
 from poetry.masonry.builders.editable import EditableBuilder
@@ -105,6 +107,15 @@ def test_builder_installs_proper_files_for_standard_packages(
     assert dist_info.joinpath("METADATA").exists()
     assert dist_info.joinpath("RECORD").exists()
     assert dist_info.joinpath("entry_points.txt").exists()
+    assert dist_info.joinpath("direct_url.json").exists()
+
+    assert not DeepDiff(
+        {
+            "dir_info": {"editable": True},
+            "url": simple_poetry.file.path.parent.as_uri(),
+        },
+        json.loads(dist_info.joinpath("direct_url.json").read_text()),
+    )
 
     assert dist_info.joinpath("INSTALLER").read_text() == "poetry"
     assert (
@@ -157,6 +168,7 @@ def test_builder_installs_proper_files_for_standard_packages(
     assert str(dist_info.joinpath("INSTALLER")) in records
     assert str(dist_info.joinpath("entry_points.txt")) in records
     assert str(dist_info.joinpath("RECORD")) in records
+    assert str(dist_info.joinpath("direct_url.json")) in records
 
     baz_script = f"""\
 #!{tmp_venv.python}