task.wrapper.py

#!/usr/bin/env python3

# This script wraps taskwarrior,
# allowing the tasks to be stored in plain-text.
# `taskchampion.sqlite3.dump` can be stored in GIT.
# This script creates it on demand.

import os
import sys
import subprocess

task_dir = os.path.expanduser("~/.local/task")

task_bin = os.path.join(task_dir, "taskchampion.sqlite3")
task_txt = os.path.join(task_dir, "taskchampion.sqlite3.dump")
task_cmd = "/usr/bin/task"

# When running for the first time, the text wont exist.
if os.path.exists(task_txt):
    if os.path.exists(task_bin):
        os.unlink(task_bin)

    cmd = (
        "sqlite3",
        task_bin,
        ".read " + task_txt,
    )
    subprocess.check_call(cmd)


cmd = (
    task_cmd,
    *sys.argv[1:],
)
subprocess.check_call(cmd)

# Unlikely but not impossible, write a new file.
if not os.path.exists(task_txt):
    # Always update.
    cmd = (
        "sqlite3",
        task_bin,
        ".output " + task_txt,

        # Annoying, without this, every conversion gets a new entry.
        "DELETE FROM sqlite_sequence",

        ".dump",
    )
    subprocess.check_call(cmd)
else:
    # Only update on file-change.
    cmd = (
        "sqlite3",
        task_bin,

        # Edit, while tasks can be read, this seems to corrupt the data
        # (can read but can't delete items, keep commented).
        #~ # Annoying, without this, every conversion gets a new entry.
        #~ "DELETE FROM sqlite_sequence",
        #~ # These also get added and don't seem to be needed.
        #~ "DELETE FROM working_set",

        ".dump",
    )
    dump_new = subprocess.check_output(cmd)
    with open(task_txt, "rb") as fh:
        dump_old = fh.read()

    if dump_new != dump_old:
        with open(task_txt, "wb") as fh:
            fh.write(dump_new)


if os.path.exists(task_bin):
    os.unlink(task_bin)