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49 lines
1.3 KiB
49 lines
1.3 KiB
""" |
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Startup site customization for Stability Matrix. |
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Currently this installs an audit hook to notify the parent process when input() is called, |
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so we can prompt the user to enter something. |
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""" |
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import sys |
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# Application Program Command escape sequence |
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# This wraps messages sent to the parent process. |
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esc_apc = "\x9F" |
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esc_prefix = "[SM;" |
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esc_st = "\x9C" |
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def send_apc(msg: str): |
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"""Send an Application Program Command to the parent process.""" |
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sys.stdout.flush() |
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sys.stdout.write(esc_apc + esc_prefix + msg + esc_st) |
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sys.stdout.flush() |
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def send_apc_input(prompt: str): |
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"""Apc message for input() prompt.""" |
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send_apc('{"type":"input","data":"' + str(prompt) + '"}') |
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def audit(event: str, *args): |
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"""Main audit hook function.""" |
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# https://docs.python.org/3/library/functions.html#input |
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# input() raises audit event `builtins.input` with args (prompt: str) *before* reading from stdin. |
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# `builtins.input/result` raised after reading from stdin. |
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if event == "builtins.input": |
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try: |
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prompts = args[0] if args else () |
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prompt = "".join(prompts) |
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send_apc_input(prompt) |
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except Exception: |
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pass |
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# Reconfigure stdout to UTF-8 |
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# noinspection PyUnresolvedReferences |
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sys.stdout.reconfigure(encoding="utf-8") |
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# Install the audit hook |
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sys.addaudithook(audit)
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