| from threading import local | |
| _local = local() | |
| def get_current_context(silent=False): | |
| """Returns the current click context. This can be used as a way to | |
| access the current context object from anywhere. This is a more implicit | |
| alternative to the :func:`pass_context` decorator. This function is | |
| primarily useful for helpers such as :func:`echo` which might be | |
| interested in changing its behavior based on the current context. | |
| To push the current context, :meth:`Context.scope` can be used. | |
| .. versionadded:: 5.0 | |
| :param silent: if set to `True` the return value is `None` if no context | |
| is available. The default behavior is to raise a | |
| :exc:`RuntimeError`. | |
| """ | |
| try: | |
| return _local.stack[-1] | |
| except (AttributeError, IndexError): | |
| if not silent: | |
| raise RuntimeError("There is no active click context.") | |
| def push_context(ctx): | |
| """Pushes a new context to the current stack.""" | |
| _local.__dict__.setdefault("stack", []).append(ctx) | |
| def pop_context(): | |
| """Removes the top level from the stack.""" | |
| _local.stack.pop() | |
| def resolve_color_default(color=None): | |
| """"Internal helper to get the default value of the color flag. If a | |
| value is passed it's returned unchanged, otherwise it's looked up from | |
| the current context. | |
| """ | |
| if color is not None: | |
| return color | |
| ctx = get_current_context(silent=True) | |
| if ctx is not None: | |
| return ctx.color | |