Editable rework dist_info to use --output-dir instead of --egg-base

setuptools/build_meta.py

@@ -185,7 +185,7 @@ def get_requires_for_build_sdist(self, config_settings=None):
     def prepare_metadata_for_build_wheel(self, metadata_directory,
                                          config_settings=None):
         sys.argv = sys.argv[:1] + [
-            'dist_info', '--egg-base', metadata_directory]
+            'dist_info', '--output-dir', metadata_directory]
         with no_install_setup_requires():
             self.run_setup()
 

setuptools/command/dist_info.py

@@ -7,10 +7,12 @@
 import re
 import warnings
 from inspect import cleandoc
+from pathlib import Path
 
 from distutils.core import Command
 from distutils import log
 from setuptools.extern import packaging
+from setuptools._deprecation_warning import SetuptoolsDeprecationWarning
 
 
 class dist_info(Command):
@@ -19,28 +21,46 @@ class dist_info(Command):
 
     user_options = [
         ('egg-base=', 'e', "directory containing .egg-info directories"
-                           " (default: top of the source tree)"),
+                           " (default: top of the source tree)"
+                           " DEPRECATED: use --output-dir."),
+        ('output-dir=', 'o', "directory inside of which the .dist-info will be"
+                             "created (default: top of the source tree)"),
     ]
 
     def initialize_options(self):
         self.egg_base = None
+        self.output_dir = None
+        self.name = None
+        self.dist_info_dir = None
 
     def finalize_options(self):
-        pass
+        if self.egg_base:
+            msg = "--egg-base is deprecated for dist_info command. Use --output-dir."
+            warnings.warn(msg, SetuptoolsDeprecationWarning)
+            self.output_dir = self.egg_base or self.output_dir
 
-    def run(self):
-        egg_info = self.get_finalized_command('egg_info')
-        egg_info.egg_base = self.egg_base
+        dist = self.distribution
+        project_dir = dist.src_root or os.curdir
+        self.output_dir = Path(self.output_dir or project_dir)
+
+        egg_info = self.reinitialize_command('egg_info')
+        egg_info.egg_base = str(self.output_dir)
         egg_info.finalize_options()
-        egg_info.run()
-        name = _safe(self.distribution.get_name())
-        version = _version(self.distribution.get_version())
-        base = self.egg_base or os.curdir
-        dist_info_dir = os.path.join(base, f"{name}-{version}.dist-info")
-        log.info("creating '{}'".format(os.path.abspath(dist_info_dir)))
+        self.egg_info = egg_info
 
+        name = _safe(dist.get_name())
+        version = _version(dist.get_version())
+        self.name = f"{name}-{version}"
+        self.dist_info_dir = os.path.join(self.output_dir, f"{self.name}.dist-info")
+
+    def run(self):
+        self.output_dir.mkdir(parents=True, exist_ok=True)
+        self.egg_info.run()
+        egg_info_dir = self.egg_info.egg_info
+        log.info("creating '{}'".format(os.path.abspath(self.dist_info_dir)))
         bdist_wheel = self.get_finalized_command('bdist_wheel')
-        bdist_wheel.egg2dist(egg_info.egg_info, dist_info_dir)
+        bdist_wheel.egg2dist(egg_info_dir, self.dist_info_dir)
+        assert os.path.exists(egg_info_dir) is False
 
 
 def _safe(component: str) -> str:

setuptools/tests/test_dist_info.py

@@ -91,6 +91,15 @@ def test_invalid_version(self, tmp_path):
         dist_info = next(tmp_path.glob("*.dist-info"))
         assert dist_info.name.startswith("proj-42")
 
+    def test_output_dir(self, tmp_path):
+        config = "[metadata]\nname=proj\nversion=42\n"
+        (tmp_path / "setup.cfg").write_text(config, encoding="utf-8")
+        out = (tmp_path / "__out")
+        out.mkdir()
+        run_command("dist_info", "--output-dir", str(out), cwd=tmp_path)
+        assert len(list(out.glob("*.dist-info"))) == 1
+        assert len(list(tmp_path.glob("*.dist-info"))) == 0
+
 
 class TestWheelCompatibility:
     """Make sure the .dist-info directory produced with the ``dist_info`` command