~krathalan/miscellaneous-scripts

Miscellaneous scripts I wrote, use, and will probably continue to maintain
Remove aur packages check
Move watch_add_packages to separate krack project
Rename aur to kaur to avoid aurutils file conflicts

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#Krathalan's Scripts

This repository is a collection of scripts I wrote and use/update regularly. These scripts are provided without warranty in the hope that you will find them useful. Contributions are accepted, just open an issue or a pull request.

Please don't run these scripts without reading them first. Always read a script before running it on your machine, especially if it requires sudo/root privileges.

Seven POSIX-compliant sh scripts, seven Bash scripts. Scripts ending in .sh are POSIX-complaint without "Bash-isms". Scripts that are Bash-only often are because of the use of arrays.

#audio_to_opus (bash)

Simply specify an audio type (e.g. "mp3", "flac") and this script will convert all audio files in that directory to the opus format.

For example, if you execute bash audio_to_opus flac: all "*.flac" files in the working directory will be converted to "*.opus" files, all "*.flac" files will be placed into a new "flac/" directory, again in the working directory.

#aur (bash)

Miniscule AUR helper.

Four functions:

=> [c]heck           - Check local package versions against those on the AUR.
                       Pass --quiet/-q flag to print only non-matching versions.
=> [f]etch [name(s)] - Clone git repository of [name] package(s) on the AUR.
=> [p]kgbuild [name] - Print the PKGBUILD for [name] package
=> [i]nfo [name]     - Show full information for [name] package on the AUR.
=> [s]earch [name]   - Search for [name] on the AUR.

Note that though aur is licensed under the GPLv3 license, the script incorporates work Copyright (C) 2016-2019 Dylan Araps originally from MIT-licensed code from pash. See Maintaining Permissive-Licensed Files in a GPL-Licensed Project: Guidelines for Developers by the Software Freedom Law Center for more information.

#check_all.sh

Checks all shell scripts in the current directory with shellcheck.

#gather_time_data (bash)

I no longer recommend using this script. Instead I recommend using hyperfine: https://github.com/sharkdp/hyperfine

#list_nonfree_packages (bash)

Lists nonfree packages installed on Arch Linux according to Parabola's blacklist. Ignores packages that are blacklisted for "branding" or "technical" reasons; that is, they are not necessarily nonfree, but may conflict with Parabola's rebuilds of certain packages.

#make_gif.sh

I made this script after the camera app I use on my phone lost its auto-gif-making functionality whenever I would take burst photos.

To use it, put the photos you want to make into a gif into a directory, and then run the script in that directory.

Here's an example gif of my cat I made with make_gif:

Example

#mythic_event

A script I made for my World of Warcraft guild's Mythic+ dungeon event. Supply a list of characters, like so:

$ cat example_input
  Ahkenatan chogall
  Morisong chogall
  Tireiron laughing-skull
  Euphoric chogall

And the script will output a file ratings.txt, with Raider.IO information for each character in the list:

$ cat ratings.txt
  ======================================================
  |      Collector's Anonymous Mythic Plus Ratings     |
  |              Generated on Jun 11, 2020             |
  | https://git.sr.ht/~krathalan/miscellaneous-scripts |
  ======================================================

  IO Score -- Character, ilvl class
  =================================

  Tanks:
  1713 -- Tireiron, 475 Paladin

  Healers:
  1793 -- Euphoric, 479 Monk

  DPS:
  2136 -- Ahkenatan, 476 Mage
  1993 -- Morisong, 474 Mage

#prntscrn.sh

Takes a nice screenshot after the specified seconds and saves it to ${XDG_PICTURES_DIR}/screenshots. Displays a notification when the screenshot is taken. Easily bound to a key in your i3 or sway config. Uses scrot for i3/Xorg and grim for sway/Wayland. Provides nice errors via desktop notifications as well if you don't have the proper package installed.

On sway/Wayland, invoking prntscrn.sh with any argument, like prntscrn.sh slurp, will allow you to select an area of the screen and will copy the selected jpeg to your clipboard.

#remove_from_name (bash)

This script will rename all files in the current working directory by removing a specified string from their file names.

For example:

$ ls
test-remove1.txt  test-remove2.txt  test-remove3.txt  test-remove4.txt  test-remove5.txt

$ remove_from_name "remove"
==> This is what the files will be renamed to:
test-1.txt
test-2.txt
test-3.txt
test-4.txt
test-5.txt

==> Proceed with renaming?
[y/N] y
Files renamed.

#scramble_photos.sh

Deletes the exif data on all photos in the current directory and attempts to restore the "datetimeoriginal" (date taken) value from the photo's file name. Then moves them to ${HOME}/pictures/$(date +%Y), e.g. ~/pictures/2020; creating the folder if it doesn't exist. Pass --no-copy to keep them in the current directory.

#script_template.sh

A simple POSIX-compliant script template I use. Easy to use as a Bash script template as well.

#system_maintenance.sh

This script will perform system maintenance on an Arch Linux system. It will:

  • Clean pacman caches (if the flag --clean is passed)
  • Update /etc/pacman.d/mirrorlist if it hasn't been updated in more than 3.5 days
    • This functionality requires the reflector package to be installed
  • Update installed packages
  • Check for AUR package updates
    • This functionality requires the aur script from this repo to be in your $PATH
  • Remove unused packages
  • Remove journald entries older than 1 day
  • Update installed flatpaks and remove unused flatpaks
    • This functionality requires the flatpak package to be installed
  • Check your pacman database for errors
  • List failed systemd units
  • List *.pacsave and *.pacnew files in /etc
  • Print disk usage

#timer.sh

Requires the termdown and mpv packages to be installed.

Specify a termdown timer, e.g. timer.sh 5m, and this script will play a sound file on repeat when the termdown timer is finished. Specify which sound file to play by setting the $TIMER_SOUND_FILE environment variable to a valid sound file path.

#update_git_repos (bash)

This script will run git pull --prune inside every Git repository in the current directory.

#update_wow_addons (bash)

I no longer recommend using this script. Instead I recommend using Cursebreaker: https://github.com/AcidWeb/CurseBreaker

#watch_add_packages (bash)

Watches a specified directory ($DROPBOX_PATH in your env) for new packages and moves them to a specified pacman repo ($REPO_ROOT in your env). Adds them to a specified pacman repo database file ($REPO_DB_FILE in your env).

Comes with watch_add_packages.service. To add your own enviroment variables to a server environment, first create the override directory:

$ sudo mkdir /etc/systemd/system/watch_add_packages.service.d

Then save an override file (for example /etc/systemd/system/watch_add_packages.service.d/env-vars.conf) with the following contents (change the actual paths to match your own setup):

[Service]
Environment="REPO_ROOT=/var/www/builds/x86_64"
Environment="REPO_DB_FILE=krathalan.db.tar"
Environment="DROPBOX_PATH=/home/admin/package-dropbox"

Finally, reload systemd and restart the service:

$ sudo systemctl daemon-reload && sudo systemctl restart watch_add_packages.service

Now whenever you rsync packages to the $DROPBOX_PATH on the remote, watch_add_packages will pick them up and move them to $REPO_ROOT, chown root:root them, and add them to the $REPO_DB_FILE.