setup.py

#!/usr/bin/env python3

import glob
import os
import subprocess
import sys
from pathlib import Path
from subprocess import CalledProcessError, check_output

from setuptools import find_packages, setup
from setuptools.command.build_py import build_py


class CustomBuildExtCommand(build_py):
    """Customized setuptools install command - prints a friendly greeting."""
    script_path: Path = Path("scripts")

    def buildInkscapeExt(self) -> None:
        try:
            subprocess.run([sys.executable, str(self.script_path / "boxes2inkscape"), "inkex"], check=True, capture_output=True, text=True)
        except CalledProcessError as e:
            print("Could not build inkscape extension because of error: ", e)
            print("Output: ", e.stdout, e.stderr)

    def updatePOT(self) -> None:
        try:
            subprocess.run([sys.executable, str(self.script_path / "boxes2pot"), "po/boxes.py.pot"], check=True, capture_output=True, text=True)
            subprocess.run(["xgettext -L Python -j --from-code=utf-8 -o po/boxes.py.pot boxes/*.py scripts/boxesserver scripts/boxes"], shell=True, check=True, capture_output=True, text=True)
        except CalledProcessError as e:
            print("Could not process translation because of error: ", e)
            print("Output: ", e.stdout, e.stderr)

    def generate_mo_files(self):
        pos = glob.glob("po/*.po")

        for po in pos:
            lang = po.split(os.sep)[1][:-3].replace("-", "_")
            try:
                os.makedirs(os.path.join("locale", lang, "LC_MESSAGES"))
            except FileExistsError:
                pass
            os.system(f"msgfmt {po} -o locale/{lang}/LC_MESSAGES/boxes.py.mo")
            self.distribution.data_files.append(
                (os.path.join("share", "locale", lang, "LC_MESSAGES"),
                 [os.path.join("locale", lang, "LC_MESSAGES", "boxes.py.mo")]))

    def run(self):
        if self.distribution.data_files is None:
            self.distribution.data_files = []
        self.execute(self.updatePOT, ())
        self.execute(self.generate_mo_files, ())
        self.execute(self.buildInkscapeExt, ())

        if 'CURRENTLY_PACKAGING' in os.environ:
            # we are most probably building a Debian package
            # let us define a simple path!
            path="/usr/share/inkscape/extensions"
            self.distribution.data_files.append((path, [i for i in glob.glob(os.path.join("inkex", "*.inx"))]))
            self.distribution.data_files.append((path, ['scripts/boxes']))
            self.distribution.data_files.append((path, ['scripts/boxes_proxy.py']))
        else:
            # we are surely not building a Debian package
            # then here is the default behavior:
            try:
                path = check_output(["inkscape", "--system-data-directory"]).decode().strip()
                path = os.path.join(path, "extensions")
                if not os.access(path, os.W_OK): # Can we install globally
                    # Not tested on Windows and Mac
                    path = os.path.expanduser("~/.config/inkscape/extensions")
                self.distribution.data_files.append((path, [i for i in glob.glob(os.path.join("inkex", "*.inx"))]))
                self.distribution.data_files.append((path, ['scripts/boxes']))
                self.distribution.data_files.append((path, ['scripts/boxes_proxy.py']))
            except (CalledProcessError, FileNotFoundError) as e:
                print("Could not find Inkscape. Skipping plugin files.\n", e)
                pass # Inkscape is not installed

        build_py.run(self)

setup(
    packages=find_packages(),
    cmdclass={
        'build_py': CustomBuildExtCommand,
    },
    )