conan_python_package_tools

Example Python program conan_python_package_tools.py

Modules

import os
import subprocess
from conans import tools
from conans.errors import ConanException
'from distutils.sysconfig import get_python_lib; print get_python_lib(1)'
'from distutils.sysconfig import get_python_lib; print get_python_lib()'

Methods

def python_path(_conanfile):
def build(conanfile):
def package(conanfile):

Code

Python example

import os
import subprocess

from conans import tools
from conans.errors import ConanException


def python_path(_conanfile):
    """Return path to python interpreter for which package is being built"""
    return "python"


def build(conanfile):
    """Build pyton package from source"""

    archive_path = os.path.join(conanfile.source_folder,
                                conanfile.ARCHIVE_NAME)

    if not os.path.exists(archive_path):
        raise ConanException(
            ("Source package is not found at path: {}.\n"
             "Please make sure that you ran conan export / conan upload"))

    conanfile.output.info("Unpacking archive {} to build folder...".format(
        conanfile.ARCHIVE_NAME))
    tools.unzip(archive_path)

    setup_cfg_path = os.path.join(conanfile.FOLDER_NAME, "setup.cfg")
    conanfile.output.info(
        "Patching {} to disable automated download...".format(setup_cfg_path))
    tools.save(
        setup_cfg_path, ("[easy_install]\n"
                         "allow_hosts = None\n"),
        append=True)

    build_command = "{} setup.py install -O1 --root={}".format(
        python_path(conanfile), conanfile.build_folder)
    conanfile.output.info(
        "Building package with command: {}".format(build_command))
    with tools.chdir(conanfile.FOLDER_NAME):
        conanfile.run(build_command)


def package(conanfile):
    """Copy built python package into conan cache directory"""

    python = python_path(conanfile)

    python_sitearch = subprocess.check_output([
        python, "-c",
        'from distutils.sysconfig import get_python_lib; print get_python_lib(1)'
    ]).decode().strip()[1:]

    conanfile.output.info(
        "Platform-dependent modules are installed into: {}".format(
            python_sitearch))

    python_sitelib = subprocess.check_output([
        python, "-c",
        'from distutils.sysconfig import get_python_lib; print get_python_lib()'
    ]).decode().strip()[1:]

    conanfile.output.info(
        "Pure python modules are installed into: {}".format(python_sitelib))

    conanfile.copy("*", src=python_sitearch)
    conanfile.copy("*", src=python_sitelib)

Useful Links

Articles: https://python-commandments.org/
Python shell: https://bsdnerds.org/learn-python/
Tutorial: https://pythonprogramminglanguage.com/