Fix sdist installation (#3080)

* Fix sdist installation

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

* Unify project description with tensorrt_libs

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

* Switch requirements to PEP440 direct references

https://peps.python.org/pep-0440/#direct-references

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

* Revert "Switch requirements to PEP440 direct references"

This reverts commit 5334f0d.

ref #3080 (comment)

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

* Make pip-inside-pip more robust, avoid it when possible

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

* Add parent_command_line check

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

* Use pip config list to detect index url

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

* PR Suggestion

Co-authored-by: Eric Work <work.eric@gmail.com>
Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

* Add --no-headers to ps command

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

* Introduce NVIDIA_PIP_INDEX_URL env var

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

* Typo in description

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

* Run black

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

* Replace f-string with .format, add python_requires

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

* Introduce NVIDIA_TENSORRT_DISABLE_INTERNAL_PIP env var

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

* PR Suggestion

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>

---------

Signed-off-by: ddelange <14880945+ddelange@users.noreply.github.com>
Co-authored-by: Eric Work <work.eric@gmail.com>

Author: ddelange

python/packaging/frontend_sdist/setup.py

@@ -15,42 +15,103 @@
 # 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),
+]
+nvidia_pip_index_url = os.environ.get("NVIDIA_PIP_INDEX_URL", "https://pypi.nvidia.com")
+disable_internal_pip = os.environ.get("NVIDIA_TENSORRT_DISABLE_INTERNAL_PIP", False)
+
+
+def run_pip_command(args, call_func):
+    try:
+        return call_func([sys.executable, "-m", "pip"] + args)
+    except subprocess.CalledProcessError:
+        return call_func([os.path.join(sys.exec_prefix, "bin", "pip")] + args)
 
 
 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()
-
-        install_dep("{:}_libs".format(tensorrt_module))
-        install_dep("{:}_bindings".format(tensorrt_module))
-
-        install.run(self)
+        # pip-inside-pip hack ref #3080
+        run_pip_command(
+            [
+                "install",
+                "--extra-index-url",
+                nvidia_pip_index_url,
+                *tensorrt_submodules,
+            ],
+            subprocess.check_call,
+        )
+
+        super().run()
+
+
+def pip_config_list():
+    """Get the current pip config (env vars, config file, etc)."""
+    return run_pip_command(["config", "list"], subprocess.check_output).decode()
+
+
+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", "--no-headers"]
+        ).decode()
+    except subprocess.CalledProcessError:
+        return ""
+
+
+# use pip-inside-pip hack only if the nvidia index is not set in the environment
+if (
+    disable_internal_pip
+    or nvidia_pip_index_url in pip_config_list()
+    or nvidia_pip_index_url 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 {}
+```
+Or add the index URL to the (space-separated) PIP_EXTRA_INDEX_URL environment variable:
+```
+export PIP_EXTRA_INDEX_URL='{}'
+pip install tensorrt
+```
+When the extra index url does not contain `{}`, a nested `pip install` will run with the proper extra index url hard-coded.
+""".format(
+        nvidia_pip_index_url, nvidia_pip_index_url, nvidia_pip_index_url
+    ),
+    long_description_content_type="text/markdown",
     author="NVIDIA Corporation",
     license="Proprietary",
     classifiers=[
@@ -59,12 +120,14 @@ def install_dep(package_name):
         "Programming Language :: Python :: 3",
     ],
     packages=[tensorrt_module],
+    install_requires=install_requires,
+    python_requires=">=3.6",  # ref https://pypi.nvidia.com/tensorrt-bindings/
+    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},
 )