54 lines
1.4 KiB
Python
54 lines
1.4 KiB
Python
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"""Move Python's history file to "$XDG_STATE_HOME/python/history".
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Python 3.13+ honors the `$PYTHON_HISTORY` environment variable,
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so this file is only needed for older interpreters (e.g., via `pyenv`).
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`$PYTHONSTARTUP` is executed in the REPL's own namespace
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=> Everything is wrapped in a function that is deleted afterwards
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to avoid polluting the prompt with temporary names
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"""
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import sys
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def _setup_history():
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if sys.version_info >= (3, 13):
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return # `$PYTHON_HISTORY` handles it
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try:
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import readline # because it is not in every build
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except ImportError:
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return
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import atexit
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import os
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state_home = os.environ.get("XDG_STATE_HOME") or os.path.join(
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os.path.expanduser("~"), ".local", "state"
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)
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history_file = os.path.join(state_home, "python", "history")
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os.makedirs(os.path.dirname(history_file), exist_ok=True)
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if os.path.isdir(history_file):
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raise OSError(history_file + " must not be a directory")
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try:
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readline.read_history_file(history_file)
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except OSError: # `$PYTHON_HISTORY` is non-existent or unreadable
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pass
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readline.set_auto_history(True)
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readline.set_history_length(99999)
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def write_history():
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try:
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readline.write_history_file(history_file)
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except OSError:
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pass
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atexit.register(write_history) # Keep a reference to `write_history`
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_setup_history()
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del _setup_history
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