Add Python Source Distribution (sdist) support

.gitignore

@@ -508,6 +508,7 @@ wheelhouse/
 
 # pip/enscons build output
 soar_sml/
+/pyproject.toml
 
 ### Soar ###
 out/

Core/ClientSMLSWIG/Python/pyproject.toml

@@ -70,7 +70,7 @@ requires = [
     # and other python build/install frontends (such as pip itself).
     #
     # We use a forked version of enscons to add python 3.12 support.
-    "enscons @ git+https://github.com/ShadowJonathan/enscons-soar@544f39f",
+    "enscons @ git+https://github.com/ShadowJonathan/enscons-soar@7d6f4ca",
 
     # Required sub-dependencies of enscons.
     "toml>=0.1",

Core/SConscript

@@ -111,7 +111,7 @@ if not CheckSWIG(env):
 	print('SWIG not found. Will not define sml_* build targets. Install swig to build wrappers for other languages.')
 else:
 	for x in 'Python Java Tcl CSharp'.split():
-		SConscript(os.path.join('ClientSMLSWIG', x, 'SConscript'))
+		SConscript(os.path.join('ClientSMLSWIG', x, 'SConscript'), must_exist=False)
 
 if 'MSVSProject' in kernel_env['BUILDERS']:
 	vcproj = kernel_env.MSVSProject(

SConstruct

@@ -417,7 +417,6 @@ py_sources += [
 env.Alias(SML_PYTHON_ALIAS + "_dev", py_sources)
 
 if enscons_active:
-    env['PACKAGE_METADATA'] = enscons.get_pyproject(env)['project']
     # Instead of giving an explicit tag, we tell enscons that we're not building a "pure" (python-only) library,
     # and so we let it determine the wheel tag by itself.
     env['ROOT_IS_PURELIB'] = False
@@ -431,6 +430,44 @@ if enscons_active:
 
     env.WhlFile(source=whl)
 
+    sdist_sources = [
+        # Add SCons related files
+        "SConstruct",
+        "Core/SConscript",
+        *env.Glob("Core/*/SConscript"),
+        "Core/ClientSMLSWIG/Python/SConscript",
+
+        # Add SWIG files
+        *env.Glob("Core/ClientSMLSWIG/*.i"),
+        *env.Glob("Core/ClientSMLSWIG/Python/*.i"),
+
+        # Add build support files
+        *env.Glob("build_support/*.py"),
+
+        # Entire SVS source tree
+        "Core/SVS",
+
+        # Misc files
+        "Core/ClientSMLSWIG/Python/README.md",
+    ]
+
+    # Look for files under Core with the following file extensions, for up to 5 levels deep.
+    #
+    # We cannot just add the directories, as they will then start to include the .tar.gz file,
+    # which scons treats as a "target", creating a circular dependency.
+    SOURCE_EXTS = {"h", "c", "cpp", "hpp", "cxx"}
+    for i in range(0, 5):
+        for ext in SOURCE_EXTS:
+            sdist_sources.extend(
+                env.Glob("Core/" + ("*/" * i) + "*." + ext)
+            )
+
+    env.SDist(
+        source=sdist_sources,
+        # We tell enscons to include a generated / corrected pyproject.toml into the source distribution
+        pyproject=True,
+    )
+
     # We make sure that an editable (`pip install -e`) installation always properly installs
     # the files in the correct places.
     env.Depends("editable", py_sources)