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#!/usr/bin/env python3
from subprocess import check_output, CalledProcessError
from sys import argv, platform
from shlex import split as s_split
import sysconfig
from setuptools import setup, Extension
from setuptools.command.build_ext import build_ext as BuildCommand
import setuptools.command.build as build
from setuptools import dist
# Determine if a base directory has been provided with the --basedir option
basedir = None
in_tree = False
# Add compiler flags if debug is set
compile_args = ["-std=c++17", "-Wunused-function", "-fpermissive"]
link_args = []
for arg in argv:
if arg.startswith("--debug"):
# Note from GCC manual:
# If you use multiple -O options, with or without level numbers,
# the last such option is the one that is effective.
compile_args.extend(["-Wall", "-O0", "-g"])
elif arg.startswith("--basedir="):
basedir = arg.split("=")[1]
in_tree = True
# If a base directory has been provided, we use it
if in_tree:
base_cmd = "{0}/net-snmp-config {{{0}}}".format(basedir)
libs_cmd = base_cmd.format("--build-lib-dirs {0}".format(basedir))
incl_cmd = base_cmd.format("--build-includes {0}".format(basedir))
netsnmp_libs = check_output(base_cmd.format("--libs"), shell=True).decode()
libdirs = check_output(libs_cmd, shell=True).decode()
incdirs = check_output(incl_cmd, shell=True).decode()
libs = [flag[2:] for flag in s_split(netsnmp_libs) if flag[:2] == "-l"]
libdirs = [flag[2:] for flag in s_split(libdirs) if flag[:2] == "-L"]
incdirs = [flag[2:] for flag in s_split(incdirs) if flag[:2] == "-I"]
# Otherwise, we use the system-installed SNMP libraries
else:
netsnmp_libs = check_output("net-snmp-config --libs", shell=True).decode()
pass_next = False
# macOS-specific
has_arg = ("-framework",)
for flag in s_split(netsnmp_libs):
if pass_next:
link_args.append(flag)
pass_next = False
elif flag in has_arg: # -framework CoreFoundation
link_args.append(flag)
pass_next = True
elif flag == "-flat_namespace":
link_args.append(flag)
pass_next = False
# link_args += [flag for flag in s_split(netsnmp_libs) if flag[:2] == '-f']
libs = [flag[2:] for flag in s_split(netsnmp_libs) if flag[:2] == "-l"]
libdirs = [flag[2:] for flag in s_split(netsnmp_libs) if flag[:2] == "-L"]
incdirs = []
if platform == "darwin": # OS X
# Check if net-snmp is installed via Brew
try:
brew = check_output("brew list net-snmp 2>/dev/null", shell=True).decode()
lines = brew.splitlines()
include_dir = list(filter(lambda l: "include/net-snmp" in l, lines))[0]
incdirs.append(include_dir[: include_dir.index("include/net-snmp") + 7])
lib_dir = list(filter(lambda l: "lib/libnetsnmp.dylib" in l, lines))[0]
libdirs.append(lib_dir[: lib_dir.index("lib/libnetsnmp.dylib") + 3])
# The homebrew version also depends on the Openssl keg
brew = check_output("brew info net-snmp", shell=True).decode()
openssl_ver = list(
filter(
lambda o: "openssl" in o,
*map(
str.split,
filter(
lambda l: "openssl" in l,
str(brew.replace("'", "")).split("\n"),
),
),
)
)[0]
brew = check_output(
"brew info {0}".format(openssl_ver), shell=True
).decode()
temp = brew.split("\n")
# As of 06/04/2024 brew info openssl spits out lines. the fifth one is what we care about
# This works for now, but we need a better solution
# ==> openssl@3: stable 3.3.0 (bottled)
# Cryptography and SSL/TLS Toolkit
# https://openssl.org/
# Installed
# /opt/homebrew/Cellar/openssl@3/3.3.0 (6,977 files, 32.4MB) *
# Poured from bottle using the formulae.brew.sh API on 2024-06-04 at 21:17:37
# From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/o/openssl@3.rb
# License: Apache-2.0
# ...
# print(temp)
temp_path = str(temp[4].split("(")[0]).strip()
libdirs.append(temp_path + "/lib")
incdirs.append(temp_path + "/include")
print(f"libdirs: {libdirs}")
print(f"incdirs: {incdirs}")
print(f"openssl_ver: {openssl_ver}")
except CalledProcessError:
print("A brew command failed...")
pass
print(f"in_tree: {in_tree}")
print(f"compile_args: {compile_args}")
print(f"link_args: {link_args}")
print(f"platform: {platform}")
class RelinkLibraries(BuildCommand):
"""Fix dylib path for macOS
Depending on system configuration and Brew setup, interface.so may get linked to
the wrong dylib file (prioritizing the system's 5.6.2.1 over brew's 5.8+). This
will change the path if net-snmp is installed via `brew`.
Non-brew installations and non-macOS systems will not be affected.
"""
def run(self):
BuildCommand.run(self)
if platform == "darwin": # Newer Net-SNMP dylib may not be linked to properly
try:
brew = check_output(
"brew list net-snmp 2>/dev/null", shell=True
).decode()
except CalledProcessError:
return
lib_dir = list(filter(lambda l: "lib/libnetsnmp.dylib" in l, lines))[0]
b = build.build(dist.Distribution()) # Dynamically determine build path
b.finalize_options()
ext = sysconfig.get_config_var("EXT_SUFFIX") or ".so" # None for Python 2
linked = (
check_output(
(
"otool -L {0}/ezsnmp/interface{1} | "
r"egrep 'libnetsnmp\.' | "
"tr -s '\t' ' ' | "
"cut -d' ' -f2"
).format(b.build_platlib, ext),
shell=True,
)
.decode()
.strip()
)
if linked:
# install_name_tool -change /opt/homebrew/opt/net-snmp/lib/libnetsnmp.40.dylib /opt/homebrew/Cellar/net-snmp/5.9.4/lib/libnetsnmp.dylib build/lib.macosx-10.9-universal2-cpython-39/ezsnmp/interface.cpython-39-darwin.so
cmd_to_run = (
"install_name_tool -change {0} {1} {2}/ezsnmp/interface{3}".format(
linked, lib_dir, b.build_platlib, ext
)
)
print("cmd_to_run: ", cmd_to_run)
_ = check_output(
cmd_to_run,
shell=True,
)
setup(
ext_modules=[
Extension(
"ezsnmp.interface",
["ezsnmp/interface.cpp"],
library_dirs=libdirs,
include_dirs=incdirs,
libraries=libs,
extra_compile_args=compile_args,
extra_link_args=link_args,
)
],
)
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