129 lines
3.1 KiB
Python
129 lines
3.1 KiB
Python
import re
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import subprocess
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from selfprivacy_api.jobs import JobStatus, Jobs
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COMPLETED_WITH_ERROR = "Completed with an error"
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RESULT_WAAS_NOT_FOUND_ERROR = "We are sorry, result was not found :("
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CLEAR_COMPLETED = "Сleaning completed."
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def run_nix_store_print_dead():
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return subprocess.check_output(["nix-store", "--gc", "--print-dead"]).decode(
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"utf-8"
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)
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def run_nix_collect_garbage():
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return subprocess.Popen(
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["nix-collect-garbage", "-d"], stdout=subprocess.PIPE, stderr=subprocess.STDOUT
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).stdout
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def set_job_status_wrapper(Jobs, job):
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def set_job_status(status, progress, status_text, result="Default result"):
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Jobs.update(
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job=job,
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status=status,
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progress=progress,
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status_text=status_text,
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result=result,
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)
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return set_job_status
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def parse_line(line):
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pattern = re.compile(r"[+-]?\d+\.\d+ \w+(?= freed)")
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match = re.search(
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pattern,
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line,
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)
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if match is None:
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return (
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JobStatus.FINISHED,
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100,
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COMPLETED_WITH_ERROR,
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RESULT_WAAS_NOT_FOUND_ERROR,
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)
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else:
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return (
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JobStatus.FINISHED,
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100,
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CLEAR_COMPLETED,
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f"{match.group(0)} have been cleared",
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)
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def stream_process(
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stream,
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package_equal_to_percent,
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set_job_status,
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):
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percent = 0
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for line in stream:
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if "deleting '/nix/store/" in line:
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percent += package_equal_to_percent
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set_job_status(
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status=JobStatus.RUNNING,
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progress=int(percent),
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status_text="Сleaning...",
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)
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elif "store paths deleted," in line:
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status = parse_line(line)
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set_job_status(
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status=status[0],
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progress=status[1],
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status_text=status[2],
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result=status[3],
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)
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def get_dead_packages(output):
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dead = len(re.findall("/nix/store/", output))
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percent = None
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if dead != 0:
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percent = 100 / dead
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return dead, percent
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def nix_collect_garbage(
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job,
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jobs=Jobs,
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run_nix_store=run_nix_store_print_dead,
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run_nix_collect=run_nix_collect_garbage,
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set_job_status=None,
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): # innocent as a pure function
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set_job_status = set_job_status or set_job_status_wrapper(jobs, job)
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set_job_status(
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status=JobStatus.RUNNING,
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progress=0,
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status_text="Сalculate the number of dead packages...",
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)
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dead_packages, package_equal_to_percent = get_dead_packages(run_nix_store())
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if dead_packages == 0:
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set_job_status(
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status=JobStatus.FINISHED,
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progress=100,
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status_text="Nothing to clear",
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result="System is clear",
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)
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return
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set_job_status(
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status=JobStatus.RUNNING,
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progress=0,
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status_text=f"Found {dead_packages} packages to remove!",
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)
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stream_process(run_nix_collect(), package_equal_to_percent, set_job_status)
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