blendercam/scripts/addons/fabex/tests/install_addon.py

import pathlib
import shutil
import subprocess
import sys
import tempfile


INSTALL_CODE = f"""
import bpy
bpy.context.preferences.system.use_online_access = True
bpy.ops.extensions.repo_sync_all(use_active_only=False)
bpy.ops.extensions.package_install_files(filepath='{sys.argv[1]}', repo='user_default')
bpy.ops.extensions.package_install(repo_index=0, pkg_id="stl_format_legacy")
bpy.ops.extensions.package_install(repo_index=0, pkg_id="simplify_curves_plus")
bpy.ops.extensions.package_install(repo_index=0, pkg_id="curve_tools")
bpy.ops.wm.save_userpref()
"""

NUM_RETRIES = 10

with tempfile.TemporaryDirectory() as td:
    file = pathlib.Path(td, "install.py")
    file.write_text(INSTALL_CODE)
    command = [shutil.which("blender"), "-b", "-P", str(file)]

    # blender 4.0 installing addon crashes sometimes on mac github actions...
    for x in range(NUM_RETRIES):
        try:
            subprocess.run(
                command,
                shell=False,
                check=True,
                stdout=subprocess.PIPE,
                stderr=subprocess.STDOUT,
                text=True,
            )
            print("Addon Install: Success!")
            sys.exit(0)
        except subprocess.CalledProcessError as e:
            print("Addon Install: Failed!")
            print(f"Retrying: {e}")
            print("Command Output:")
            print("------------------------------")
            print(e.output)
            print("------------------------------")
            for line in str(e.output):
                if line.startswith("Writing: "):
                    crash_file = pathlib.Path(line[len("Writing: ") :])
                    if crash_file.exists():
                        print("Crash log:\n================")
                        print(crash_file.read_text())
                        print("============================")