inkstitch/inkstitch.py

# Authors: see git history
#
# Copyright (c) 2010 Authors
# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.

import os
import sys
from pathlib import Path  # to work with paths as objects
from argparse import ArgumentParser  # to parse arguments and remove --extension

if sys.version_info >= (3, 11):
    import tomllib      # built-in in Python 3.11+
else:
    import tomli as tomllib

import logging

import lib.debug.utils as debug_utils
import lib.debug.logging as debug_logging
from lib.debug.utils import safe_get    # mimic get method of dict with default value

# --------------------------------------------------------------------------------------------

SCRIPTDIR = Path(__file__).parent.absolute()

logger = logging.getLogger("inkstitch")   # create module logger with name 'inkstitch'

# TODO --- temporary --- catch old DEBUG.ini file and inform user to reformat it to DEBUG.toml
old_debug_ini = SCRIPTDIR / "DEBUG.ini"
if old_debug_ini.exists():
    print("ERROR: old DEBUG.ini exists, please reformat it to DEBUG.toml and remove DEBUG.ini file", file=sys.stderr)
    exit(1)
# --- end of temporary ---

debug_toml = SCRIPTDIR / "DEBUG.toml"
if debug_toml.exists():
    with debug_toml.open("rb") as f:
        ini = tomllib.load(f)  # read DEBUG.toml file if exists, otherwise use default values in ini object
else:
    ini = {}
# --------------------------------------------------------------------------------------------

running_as_frozen = getattr(sys, 'frozen', None) is not None  # check if running from pyinstaller bundle

if not running_as_frozen:  # override running_as_frozen from DEBUG.toml - for testing
    if safe_get(ini, "DEBUG", "force_frozen", default=False):
        running_as_frozen = True

if len(sys.argv) < 2:
    # no arguments - prevent accidentally running this script
    msg = "No arguments given, exiting!"  # without gettext localization see _()
    if running_as_frozen:  # we show dialog only when running from pyinstaller bundle - using wx
        try:
            import wx
            app = wx.App()
            dlg = wx.MessageDialog(None, msg, "Inkstitch", wx.OK | wx.ICON_ERROR)
            dlg.ShowModal()
            dlg.Destroy()
        except ImportError:
            print(msg, file=sys.stderr)
    else:
        print(msg, file=sys.stderr)
    exit(1)

# activate logging - must be done before any logging is done
debug_logging.activate_logging(running_as_frozen, ini, SCRIPTDIR)
# --------------------------------------------------------------------------------------------

# check if running from inkscape, given by environment variable
if os.environ.get('INKSTITCH_OFFLINE_SCRIPT', '').lower() in ['true', '1', 'yes', 'y']:
    running_from_inkscape = False
else:
    running_from_inkscape = True

# initialize debug and profiler type
debug_active = bool((gettrace := getattr(sys, 'gettrace')) and gettrace())  # check if debugger is active on startup
debug_type = 'none'
profiler_type = 'none'

if not running_as_frozen:  # debugging/profiling only in development mode
    # specify debugger type
    #   but if script was already started from debugger then don't read debug type from ini file or cmd line
    if not debug_active:
        debug_type = debug_utils.resolve_debug_type(ini)  # read debug type from ini file or cmd line

    profiler_type = debug_utils.resolve_profiler_type(ini)  # read profile type from ini file or cmd line

    if running_from_inkscape:
        # process creation of the Bash script - should be done before sys.path is modified, see below in prefere_pip_inkex
        if safe_get(ini, "DEBUG", "create_bash_script", default=False):  # create script only if enabled in DEBUG.toml
            debug_utils.write_offline_debug_script(SCRIPTDIR, ini)

        # disable debugger when running from inkscape
        disable_from_inkscape = safe_get(ini, "DEBUG", "disable_from_inkscape", default=False)
        if disable_from_inkscape:
            debug_type = 'none'  # do not start debugger when running from inkscape

    # prefer pip installed inkex over inkscape bundled inkex, pip version is bundled with Inkstitch
    # - must be be done before importing inkex
    prefere_pip_inkex = safe_get(ini, "LIBRARY", "prefer_pip_inkex", default=True)
    if prefere_pip_inkex and 'PYTHONPATH' in os.environ:
        debug_utils.reorder_sys_path()

# enabling of debug depends on value of debug_type in DEBUG.toml file
if debug_type != 'none':
    from lib.debug.debugger import init_debugger
    init_debugger(debug_type, ini)
    # check if debugger is really activated
    debug_active = bool((gettrace := getattr(sys, 'gettrace')) and gettrace())

# activate logging for svg
# we need to import only after possible modification of sys.path, we disable here flake8 E402
from lib.debug.debug import debug  # noqa: E402  # import global variable debug - don't import whole module
debug.enable()  # perhaps it would be better to find a more relevant name; in fact, it's about logging and svg creation.

# log startup info
debug_logging.startup_info(logger, SCRIPTDIR, running_as_frozen, running_from_inkscape, debug_active, debug_type, profiler_type)

# --------------------------------------------------------------------------------------------

# pop '--extension' from arguments and generate extension class name from extension name
#   example:  --extension=params will instantiate Params() class from lib.extensions.

# we need to import only after possible modification of sys.path, we disable here flake8 E402
from lib import extensions  # noqa: E402  # import all supported extensions of institch

parser = ArgumentParser()
parser.add_argument("--extension")
my_args, remaining_args = parser.parse_known_args()

extension_name = my_args.extension

# example: foo_bar_baz -> FooBarBaz
extension_class_name = extension_name.title().replace("_", "")

extension_class = getattr(extensions, extension_class_name)
extension = extension_class()  # create instance of extension class - call __init__ method

# extension run(), we differentiate between debug and normal mode
# - in debug or profile mode we debug or profile extension.run() method
# - in normal mode we run extension.run() in try/except block to catch all exceptions and hide GTK spam
if debug_active or profiler_type != "none":  # if debug or profile mode
    if profiler_type == 'none':             # only debugging
        extension.run(args=remaining_args)
    else:                                  # do profiling
        debug_utils.profile(profiler_type, SCRIPTDIR, ini, extension, remaining_args)

else:   # if not debug nor profile mode
    from lib.exceptions import InkstitchException, format_uncaught_exception
    from inkex import errormsg  # to show error message in inkscape
    from lxml.etree import XMLSyntaxError  # to catch XMLSyntaxError from inkex
    from lib.i18n import _      # see gettext translation function _()
    from lib.utils import restore_stderr, save_stderr  # to hide GTK spam

    save_stderr()  # hide GTK spam
    exception = None
    try:
        extension.run(args=remaining_args)
    except (SystemExit, KeyboardInterrupt):
        raise
    except XMLSyntaxError:
        msg = _("Ink/Stitch cannot read your SVG file. "
                "This is often the case when you use a file which has been created with Adobe Illustrator.")
        msg += "\n\n"
        msg += _("Try to import the file into Inkscape through 'File > Import...' (Ctrl+I)")
        errormsg(msg)
    except InkstitchException as exc:
        errormsg(str(exc))
    except Exception:
        errormsg(format_uncaught_exception())
        sys.exit(1)
    finally:
        restore_stderr()

    sys.exit(0)