Backport PR #55206 on branch 2.1.x (BUILD: Fix duplicate files warnin…

…g) (#55222)

Backport PR #55206: BUILD: Fix duplicate files warning

Co-authored-by: Thomas Li <47963215+lithomas1@users.noreply.github.com>

pandas/_libs/meson.build

@@ -114,9 +114,40 @@ foreach ext_name, ext_dict : libs_sources
     )
 endforeach
 
-py.install_sources(
+# Basically just __init__.py and the .pyi files
+sources_to_install = [
     '__init__.py',
-    subdir: 'pandas/_libs'
-)
+    'algos.pyi',
+    'arrays.pyi',
+    'byteswap.pyi',
+    'groupby.pyi',
+    'hashing.pyi',
+    'hashtable.pyi',
+    'index.pyi',
+    'indexing.pyi',
+    'internals.pyi',
+    'interval.pyi',
+    'join.pyi',
+    'json.pyi',
+    'lib.pyi',
+    'missing.pyi',
+    'ops.pyi',
+    'ops_dispatch.pyi',
+    'parsers.pyi',
+    'properties.pyi',
+    'reshape.pyi',
+    'sas.pyi',
+    'sparse.pyi',
+    'testing.pyi',
+    'tslib.pyi',
+    'writers.pyi'
+]
+
+foreach source: sources_to_install
+    py.install_sources(
+        source,
+        subdir: 'pandas/_libs'
+    )
+endforeach
 
 subdir('window')

pandas/_libs/tslibs/meson.build

@@ -31,7 +31,28 @@ foreach ext_name, ext_dict : tslibs_sources
     )
 endforeach
 
-py.install_sources(
+sources_to_install = [
     '__init__.py',
-    subdir: 'pandas/_libs/tslibs'
-)
+    'ccalendar.pyi',
+    'conversion.pyi',
+    'dtypes.pyi',
+    'fields.pyi',
+    'nattype.pyi',
+    'np_datetime.pyi',
+    'offsets.pyi',
+    'parsing.pyi',
+    'period.pyi',
+    'strptime.pyi',
+    'timedeltas.pyi',
+    'timestamps.pyi',
+    'timezones.pyi',
+    'tzconversion.pyi',
+    'vectorized.pyi'
+]
+
+foreach source: sources_to_install
+    py.install_sources(
+        source,
+        subdir: 'pandas/_libs/tslibs'
+    )
+endforeach

pandas/_libs/window/meson.build

@@ -16,3 +16,16 @@ py.extension_module(
     subdir: 'pandas/_libs/window',
     install: true
 )
+
+sources_to_install = [
+    '__init__.py',
+    'aggregations.pyi',
+    'indexers.pyi'
+]
+
+foreach source: sources_to_install
+    py.install_sources(
+        source,
+        subdir: 'pandas/_libs/window'
+    )
+endforeach

pandas/meson.build

@@ -26,7 +26,6 @@ subdir('_libs')
 
 subdirs_list = [
     '_config',
-    '_libs',
     '_testing',
     'api',
     'arrays',