add LICENSE in wheel dist-info package (#42187)

python/setup.py.in

@@ -13,6 +13,7 @@ from contextlib import contextmanager
 from setuptools import Command
 from setuptools import setup, Distribution, Extension
 from setuptools.command.install import install as InstallCommandBase
+from setuptools.command.egg_info import egg_info
 
 
 class BinaryDistribution(Distribution):
@@ -678,6 +679,17 @@ class InstallHeaders(Command):
     def get_outputs(self):
         return self.outfiles
 
+class EggInfo(egg_info):
+    """Copy license file into `.dist-info` folder."""
+
+    def run(self):
+        # don't duplicate license into `.dist-info` when building a distribution
+        if not self.distribution.have_run.get('install', True):
+            self.mkpath(self.egg_info)
+            self.copy_file("@PADDLE_SOURCE_DIR@/LICENSE", self.egg_info)
+
+        egg_info.run(self)
+
 # we redirect setuptools log for non-windows
 if sys.platform != 'win32':
     @contextmanager
@@ -733,6 +745,7 @@ with redirect_stdout():
         cmdclass={
             'install_headers': InstallHeaders,
             'install': InstallCommand,
+            'egg_info': EggInfo,
         },
         entry_points={
             'console_scripts': [