Remove duplicate entries from .zsh_history with timestamp.

remove_duplicate_entries_from_zsh_history_with_timestamp.py

"""
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In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit
of the public at large and to the detriment of our heirs and
successors. We intend this dedication to be an overt act of
relinquishment in perpetuity of all present and future rights to this
software under copyright law.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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"""
import os
import pathlib

filename = ".zsh_history"
zsh_history_path = pathlib.Path(os.getenv("HOME", "")) / filename
if not zsh_history_path.exists():
    raise FileNotFoundError(f"{filename} not found.")
with open(zsh_history_path, "r") as f:
    content = f.read().splitlines()
with open(zsh_history_path, "w") as f:
    unique_row_contents = set()
    for row in content:
        row_content = row.split(";", 1)[-1]
        if row_content in unique_row_contents:
            continue
        unique_row_contents.add(row_content)
        f.write(row + "\n")