easyconf-lemonbar/easyconf_lemonbar/parse_config_file.py

from yaml import safe_load
from schema import And, Optional, Regex, Schema, SchemaError, Or
from signal import SIGRTMIN, SIGRTMAX

def get_bar_config_and_module_config_list(filename):
    config_schema = Schema({
        "bar": {
            Optional("config"): {
                Optional("geometry"): Regex(r'^[0-9]*x[0-9]*\+[0-9]*\+[0-9]*$'),
                Optional("bottom"): bool,
                Optional("force"): bool,
                Optional("font"): str,
                Optional("name"): str,
                Optional("line_thickness"): And(int, lambda n: n > 0),
                Optional("bg_color", default="#000"): Regex(r'^#[0-9a-fA-F]{3}$|^#[0-9a-fA-F]{6}$|^#[0-9a-fA-F]{8}$'),
                Optional("fg_color", default="#FFF"): Regex(r'^#[0-9a-fA-F]{3}$|^#[0-9a-fA-F]{6}$|^#[0-9a-fA-F]{8}$'),
                Optional("offset"): int,
                Optional("line_color"): Regex(r'^#[0-9a-fA-F]{3}$|^#[0-9a-fA-F]{6}$|^#[0-9a-fA-F]{8}$'), 
                Optional("padding", default=" "): str,
                Optional("seperator", default="|"): str,
                Optional("margin", default=""): str
            },
            "modules": [
                { 
                    "name": str,
                    "command": str,
                    "refresh": And(int, lambda n : n >= 0),
                    Optional("prefix"): str,
                    Optional("signal"): And(int, lambda n : SIGRTMIN <= SIGRTMIN+n <= SIGRTMAX),
                    "format": {
                        "align": Or("left", "center", "right"),
                        Optional("bg_color"): Regex(r'^#[0-9a-fA-F]{3}$|^#[0-9a-fA-F]{6}$|^#[0-9a-fA-F]{8}$'),
                        Optional("fg_color"): Regex(r'^#[0-9a-fA-F]{3}$|^#[0-9a-fA-F]{6}$|^#[0-9a-fA-F]{8}$'),
                        Optional("font"): And(int, lambda n: 1 <= n <= 5),
                        Optional("offset"): int,
                        Optional("line"): {
                            "type": Or("underline", "overline"),
                            Optional("color"): Regex(r'^#[0-9a-fA-F]{3}$|^#[0-9a-fA-F]{6}$|^#[0-9a-fA-F]{8}$')
                        }
                        # Not yet implemented.
                        #Optional("button"): {
                        #    "activator": Or("left", "center", "right", "scrup", "scrdown"),
                        #    "command": str
                        #}
                    }
                }
            ]
                
        }
    })

    with open(filename, "r", encoding="utf8") as file:
        config_file = safe_load(file)

    try:
        validated_config = config_schema.validate(config_file)
        return validated_config["bar"]["config"], validated_config["bar"]["modules"]
    except SchemaError as se:
        raise se