bitcrafter @ bitcrafter @programming.dev

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2

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279

Joined

2 yr. ago

But what if I want to be on a small instance or even self-host? Then I cannot see any potentially appealing hashtags because I do not start with a large library of locally downloaded content.

Yeah, I have to say that Lemmy has been a pretty great experience so far! 😀

ONE OF US!

ONE OF US!

ONE OF US!

But if a hashtag has not made its way over to my instance, then it effectively does not exist to me. Even if I do see it show up and decide I want to see more content related to it, if said content has not ever made its way over to my instance then I am still left out. The great thing about being able about able to check out what is on other instances is that I am no longer restricted to whatever the people on my instance are interested in.

This a completely different experience from Lemmy, where I was immediately able to go to a bunch of different instances, look through their communities, and go: "I want to subscribe to this one, this one, and this one!"

It is crazy to go to all of the extra trouble of dealing with an additional pointer for the email_t type, when it is just a struct that is a simple wrapper around a char * that could be passed around directly; a lot of the code in this example is just for dealing with having to manage the lifetime of the extra email_t allocation, which seems like an unnecessary hoop to jump through.

People are not generally as self-reflective as you might think; when someone settles upon a core belief, they tend to stick with it for the rest of their lives, with any challenge to it being treated as a threat rather than as a potential opportunity for growth. You might think that when a core belief is completely wrong and leads to disastrous negative consequences that this might at be enough to lead someone to give it up, but strangely the mind does not actually work this way.

(I mean, I am not saying that these people are not also evil and/or oily snakes, but I think that there is value in observing the mental fallacies at work in others so that we can better spot them at work in ourselves, since our own mind is the one thing that we have at least some limited control over.)

Pepperidge Farm remembers.

Uh... That wasn't quite what I had in mind for it either...

Keeping it as a pet is not quite the fate I had in mind for it...

Fair enough, but if the fawn is just there for the taking anyway...

In fairness, the deer population is way out of control, so I'm just doing my part to reduce it.

Just like they say, you can modify the code and remove for free if you really want, they’re not forbidding you from doing so or anything

True, but I think you are discounting the risk that the actual god Anubis will take displeasure at such an act, potentially dooming one's real life soul.

I created a script that I dropped into /etc/cron.hourly which does the following:

1. Use rsync to mirror my root partition to a btrfs partition on another hard drive (which only updates modified files).
2. Use btrfs subvolume snapshot to create a snapshot of that mirror (which only uses additional storage for modified files).
3. Moves "old" snapshots into a trash directory so I can delete them later if I want to save space.

It is as follows:

 python

    
#!/usr/bin/env python
from datetime import datetime, timedelta
import os
import pathlib
import shutil
import subprocess
import sys

import portalocker

DATETIME_FORMAT = '%Y-%m-%d-%H%M'
BACKUP_DIRECTORY = pathlib.Path('/backups/internal')
MIRROR_DIRECTORY = BACKUP_DIRECTORY / 'mirror'
SNAPSHOT_DIRECTORY = BACKUP_DIRECTORY / 'snapshots'
TRASH_DIRECTORY = BACKUP_DIRECTORY / 'trash'

EXCLUDED = [
    '/backups',
    '/dev',
    '/media',
    '/lost+found',
    '/mnt',
    '/nix',
    '/proc',
    '/run',
    '/sys',
    '/tmp',
    '/var',

    '/home/*/.cache',
    '/home/*/.local/share/flatpak',
    '/home/*/.local/share/Trash',
    '/home/*/.steam',
    '/home/*/Downloads',
    '/home/*/Trash',
]

OPTIONS = [
    '-avAXH',
    '--delete',
    '--delete-excluded',
    '--numeric-ids',
    '--relative',
    '--progress',
]

def execute(command, *options):
    print('>', command, *options)
    subprocess.run((command,) + options).check_returncode()

execute(
    '/usr/bin/mount',
    '-o', 'rw,remount',
    BACKUP_DIRECTORY,
)

try:
    with portalocker.Lock(os.path.join(BACKUP_DIRECTORY,'lock')):
        execute(
            '/usr/bin/rsync',
            '/',
            MIRROR_DIRECTORY,
            *(
                OPTIONS
                +
                [f'--exclude={excluded_path}' for excluded_path in EXCLUDED]
            )
        )

        execute(
            '/usr/bin/btrfs',
            'subvolume',
            'snapshot',
            '-r',
            MIRROR_DIRECTORY,
            SNAPSHOT_DIRECTORY / datetime.now().strftime(DATETIME_FORMAT),
        )

        snapshot_datetimes = sorted(
            (
                datetime.strptime(filename, DATETIME_FORMAT)
                for filename in os.listdir(SNAPSHOT_DIRECTORY)
            ),
        )

        # Keep the last 24 hours of snapshot_datetimes
        one_day_ago = datetime.now() - timedelta(days=1)
        while snapshot_datetimes and snapshot_datetimes[-1] >= one_day_ago:
            snapshot_datetimes.pop()

        # Helper function for selecting all of the snapshot_datetimes for a given day/month
        def prune_all_with(get_metric):
            this = get_metric(snapshot_datetimes[-1])
            snapshot_datetimes.pop()
            while snapshot_datetimes and get_metric(snapshot_datetimes[-1]) == this:
                snapshot = SNAPSHOT_DIRECTORY / snapshot_datetimes[-1].strftime(DATETIME_FORMAT)
                snapshot_datetimes.pop()
                execute('/usr/bin/btrfs', 'property', 'set', '-ts', snapshot, 'ro', 'false')
                shutil.move(snapshot, TRASH_DIRECTORY)

        # Keep daily snapshot_datetimes for the last month
        last_daily_to_keep = datetime.now().date() - timedelta(days=30)
        while snapshot_datetimes and snapshot_datetimes[-1].date() >= last_daily_to_keep:
            prune_all_with(lambda x: x.date())

        # Keep weekly snapshot_datetimes for the last three month
        last_weekly_to_keep = datetime.now().date() - timedelta(days=90)
        while snapshot_datetimes and snapshot_datetimes[-1].date() >= last_weekly_to_keep:
            prune_all_with(lambda x: x.date().isocalendar().week)

        # Keep monthly snapshot_datetimes forever
        while snapshot_datetimes:
            prune_all_with(lambda x: x.date().month)
except portalocker.AlreadyLocked:
    sys.exit('Backup already in progress.')
finally:
    execute(
        '/usr/bin/mount',
        '-o', 'ro,remount',
        BACKUP_DIRECTORY,
    )

  

You do not come across as clever as you think that you are when your central point is that you personally are not capable of understanding code written in a different programming language.

C makes it easy to shoot yourself in the foot; C++ makes it harder, but when you do it blows your whole leg off.

Bjarne Stroustrup

I for one appreciate it when the AI let us know up front that we are conversing with a machine.

Clarification: it is actually The Ten MM Socket.

(In Middle Earth they do not exactly have machine shops, so they were only able to make one of them.)

Oh, so the picture is showing that One Ring! Makes sense now.

The first law has always pissed me off: why are you wasting that elderly scientist's time when you already know in advance what answer you want to hear and will only accept that response as being true?

In my work environment (in the US), people have roughly this much paternity leave, and it is taken for granted that they will take it because this is viewed as important even if their absence during this time inconveniences the rest of us. They often split it up, though, instead of taking it in a single contiguous chunk.

Yeah, let's throw this poor person a bone already so that they do not have to dig their buried one up.