Fix sdist installation

python/packaging/frontend_sdist/setup.py

@@ -15,42 +15,88 @@
 # limitations under the License.
 #
 
+import os
+import subprocess
 import sys
 
 from setuptools import setup
 from setuptools.command.install import install
-import subprocess as sp
 
 tensorrt_module = "##TENSORRT_MODULE##"
+tensorrt_version = "##TENSORRT_PYTHON_VERSION##"
+tensorrt_submodules = [
+    "{}_libs=={}".format(tensorrt_module, tensorrt_version),
+    "{}_bindings=={}".format(tensorrt_module, tensorrt_version),
+]
 
 
 class InstallCommand(install):
     def run(self):
-        def install_dep(package_name):
-            status = sp.run(
-                [
-                    sys.executable,
-                    "-m",
-                    "pip",
-                    "install",
-                    "{:}==##TENSORRT_PYTHON_VERSION##".format(package_name),
-                    "--index-url",
-                    "https://pypi.nvidia.com",
-                ]
-            )
-            status.check_returncode()
+        # pip-inside-pip hack ref #3080
+        subprocess.check_call(
+            [
+                "{}/bin/pip".format(sys.exec_prefix),
+                "install",
+                "--extra-index-url",
+                "https://pypi.nvidia.com",
+                *tensorrt_submodules,
+            ]
+        )
 
-        install_dep("{:}_libs".format(tensorrt_module))
-        install_dep("{:}_bindings".format(tensorrt_module))
+        super().run()
 
-        install.run(self)
+
+def parent_command_line():
+    """Get the command line of the parent PID."""
+    pid = os.getppid()
+    # try retrieval using psutil
+    try:
+        import psutil
+
+        return " ".join(psutil.Process(pid).cmdline())
+    except ModuleNotFoundError:
+        pass
+    # fall back to shell
+    try:
+        return (
+            subprocess.check_output(["ps", "-p", str(pid), "-o", "command"])
+            .decode()
+            .split("\n")[1]
+        )
+    except subprocess.CalledProcessError:
+        return ""
+
+
+# use pip-inside-pip hack only if the nvidia index is not set in the environment
+if (
+    "pypi.nvidia.com" in os.environ.get("PIP_EXTRA_INDEX_URL", "")
+    or "pypi.nvidia.com" in parent_command_line()
+):
+    install_requires = tensorrt_submodules
+    cmdclass = {}
+else:
+    install_requires = []
+    cmdclass = {"install": InstallCommand}
 
 
 setup(
     name=tensorrt_module,
-    version="##TENSORRT_PYTHON_VERSION##",
+    version=tensorrt_version,
     description="A high performance deep learning inference library",
-    long_description="A high performance deep learning inference library",
+    long_description="""A high performance deep learning inference library
+
+To install, please execute the following:
+```
+pip install tensorrt --extra-index-url https://pypi.nvidia.com
+```
+Or put the index URL in the (comma-separated) PIP_EXTRA_INDEX_URL environment variable:
+```
+export PIP_EXTRA_INDEX_URL=https://pypi.nvidia.com
+pip install tensorrt
+```
+When the extra index url is not found, a nested `pip install` will run with the extra index url hard-coded.
+""",
+    long_description_content_type="text/markdown",
     author="NVIDIA Corporation",
     license="Proprietary",
     classifiers=[
@@ -59,12 +105,13 @@ def install_dep(package_name):
         "Programming Language :: Python :: 3",
     ],
     packages=[tensorrt_module],
+    install_requires=install_requires,
+    cmdclass=cmdclass,
     extras_require={"numpy": "numpy"},
     package_data={tensorrt_module: ["*.so*", "*.pyd", "*.pdb"]},
     include_package_data=True,
     zip_safe=True,
     keywords="nvidia tensorrt deeplearning inference",
     url="https://developer.nvidia.com/tensorrt",
     download_url="https://github.com/nvidia/tensorrt/tags",
-    cmdclass={"install": InstallCommand},
 )