135 lines
3.4 KiB
Python
135 lines
3.4 KiB
Python
import re
|
||
import subprocess
|
||
from subprocess import Popen, PIPE
|
||
|
||
from selfprivacy_api.utils.huey import huey
|
||
|
||
from selfprivacy_api.jobs import JobStatus, Jobs, Job
|
||
|
||
|
||
COMPLETED_WITH_ERROR = (
|
||
"We are sorry, сompleted with an error, report it to support chat"
|
||
)
|
||
RESULT_WAS_NOT_FOUND_ERROR = "We are sorry, garbage collection result was not found, something went wrong, report it to support chat :("
|
||
CLEAR_COMPLETED = "Cleaning completed."
|
||
|
||
|
||
def run_nix_store_print_dead() -> PIPE:
|
||
subprocess.run(
|
||
["nix-env", "-p", "/nix/var/nix/profiles/system", "--delete-generations old"],
|
||
check=False,
|
||
)
|
||
|
||
return subprocess.check_output(["nix-store", "--gc", "--print-dead"]).decode(
|
||
"utf-8"
|
||
)
|
||
|
||
|
||
def run_nix_collect_garbage() -> subprocess.Popen:
|
||
return subprocess.Popen(
|
||
["nix-store", "--gc"], stdout=subprocess.PIPE, stderr=subprocess.STDOUT
|
||
).stdout
|
||
|
||
|
||
def parse_line(line):
|
||
pattern = re.compile(r"[+-]?\d+\.\d+ \w+(?= freed)")
|
||
match = re.search(pattern, line)
|
||
|
||
if match is None:
|
||
return (
|
||
JobStatus.FINISHED,
|
||
100,
|
||
COMPLETED_WITH_ERROR,
|
||
RESULT_WAS_NOT_FOUND_ERROR,
|
||
)
|
||
|
||
else:
|
||
return (
|
||
JobStatus.FINISHED,
|
||
100,
|
||
CLEAR_COMPLETED,
|
||
f"{match.group(0)} have been cleared",
|
||
)
|
||
|
||
|
||
def process_stream(job, stream, total_dead_packages):
|
||
completed_packages = 0
|
||
prev_progress = 0
|
||
|
||
for line in stream:
|
||
line = line.decode("utf-8")
|
||
|
||
if "deleting '/nix/store/" in line:
|
||
completed_packages += 1
|
||
percent = int((completed_packages / total_dead_packages) * 100)
|
||
|
||
if percent - prev_progress >= 5:
|
||
Jobs.update(
|
||
job=job,
|
||
status=JobStatus.RUNNING,
|
||
progress=percent,
|
||
status_text="Cleaning...",
|
||
)
|
||
prev_progress = percent
|
||
|
||
elif "store paths deleted," in line:
|
||
status = parse_line(line)
|
||
Jobs.update(
|
||
job=job,
|
||
status=status[0],
|
||
progress=status[1],
|
||
status_text=status[2],
|
||
result=status[3],
|
||
)
|
||
|
||
|
||
def get_dead_packages(output):
|
||
dead = len(re.findall("/nix/store/", output))
|
||
percent = 0
|
||
if dead != 0:
|
||
percent = 100 / dead
|
||
return dead, percent
|
||
|
||
|
||
@huey.task()
|
||
def calculate_and_clear_dead_packages(job: Job):
|
||
Jobs.update(
|
||
job=job,
|
||
status=JobStatus.RUNNING,
|
||
progress=0,
|
||
status_text="Calculate the number of dead packages...",
|
||
)
|
||
|
||
dead_packages, package_equal_to_percent = get_dead_packages(
|
||
run_nix_store_print_dead()
|
||
)
|
||
|
||
if dead_packages == 0:
|
||
Jobs.update(
|
||
job=job,
|
||
status=JobStatus.FINISHED,
|
||
progress=100,
|
||
status_text="Nothing to clear",
|
||
result="System is clear",
|
||
)
|
||
return
|
||
|
||
Jobs.update(
|
||
job=job,
|
||
status=JobStatus.RUNNING,
|
||
progress=0,
|
||
status_text=f"Found {dead_packages} packages to remove!",
|
||
)
|
||
|
||
process_stream(job, run_nix_collect_garbage(), package_equal_to_percent)
|
||
|
||
|
||
def start_nix_collect_garbage() -> Job:
|
||
job = Jobs.add(
|
||
type_id="maintenance.collect_nix_garbage",
|
||
name="Collect garbage",
|
||
description="Cleaning up unused packages",
|
||
)
|
||
calculate_and_clear_dead_packages(job=job)
|
||
return job
|