Backport PR #55206 on branch 2.1.x (BUILD: Fix duplicate files warning) (#55222)

Backport PR #55206: BUILD: Fix duplicate files warning Co-authored-by: Thomas Li <47963215+lithomas1@users.noreply.github.com>

Author: meeseeksmachine

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',