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87 lines
2.8 KiB
Python
87 lines
2.8 KiB
Python
"""
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Meshroom environment variable management.
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"""
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__all__ = [
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"EnvVar",
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"EnvVarHelpAction",
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]
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import argparse
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import os
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from dataclasses import dataclass
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from enum import Enum
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import sys
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import tempfile
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from typing import Any, Type
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meshroomFolder = os.path.dirname(__file__)
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@dataclass
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class VarDefinition:
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"""Environment variable definition."""
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# The type to cast the value to.
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valueType: Type
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# Default value if the variable is not set in the environment.
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default: str
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# Description of the purpose of the variable.
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description: str = ""
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def __str__(self) -> str:
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return f"{self.description} ({self.valueType.__name__}, default: '{self.default}')"
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class EnvVar(Enum):
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"""Meshroom environment variables catalog."""
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# UI - Debug
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MESHROOM_QML_DEBUG = VarDefinition(bool, "False", "Enable QML debugging")
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MESHROOM_QML_DEBUG_PARAMS = VarDefinition(
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str, "port:3768", "QML debugging params as expected by -qmljsdebugger"
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)
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# Core
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MESHROOM_PLUGINS_PATH = VarDefinition(str, "", "Paths to plugins folders containing nodes, submitters and pipeline templates")
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MESHROOM_NODES_PATH = VarDefinition(str, "", "Paths to set of nodes folders")
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MESHROOM_SUBMITTERS_PATH = VarDefinition(str, "", "Paths to set of submitters folders")
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MESHROOM_PIPELINE_TEMPLATES_PATH = VarDefinition(str, "", "Paths to et of pipeline templates folders")
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MESHROOM_TEMP_PATH = VarDefinition(str, tempfile.gettempdir(), "Path to the temporary folder")
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@staticmethod
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def get(envVar: "EnvVar") -> Any:
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"""Get the value of `envVar`, cast to the variable type."""
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value = os.environ.get(envVar.name, envVar.value.default)
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return EnvVar._cast(value, envVar.value.valueType)
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@staticmethod
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def getList(envVar: "EnvVar") -> list[Any]:
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"""Get the value of `envVar` as a list of non-empty strings."""
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paths = EnvVar.get(envVar).split(os.pathsep)
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# filter empty values
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return [p for p in paths if p]
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@staticmethod
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def _cast(value: str, valueType: Type) -> Any:
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if valueType is str:
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return value
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elif valueType is bool:
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return value.lower() in {"true", "1", "on", "yes", "y"}
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return valueType(value)
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@classmethod
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def help(cls) -> str:
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"""Return a formatted string with the details of each environment variables."""
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return "\n".join([f"{var.name}: {var.value}" for var in cls])
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class EnvVarHelpAction(argparse.Action):
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"""Argparse action for printing Meshroom environment variables help and exit."""
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DEFAULT_HELP = "Print Meshroom environment variables help and exit."
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def __call__(self, parser, namespace, value, option_string=None):
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print("Meshroom environment variables:")
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print(EnvVar.help())
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sys.exit(0)
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