Small collection of Bash scripts to launch functionalities in folders when new files appear, such as optimizing videos, converting images or battery management.
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Bash folders

Bash folder brand

Collection of Bash scripts to execute functionalities in folders, such as:


Video optimizer

Folder that watches when new videos are added and optimizes them.

Requirements

  • ffmpeg

Example in Debian.

sudo apt install ffmpeg

Install

curl -o bash-folders-video-optimizer https://raw.githubusercontent.com/tanrax/bash-folders/main/bash-folders-video-optimizer.sh && chmod +x bash-folders-video-optimizer && sudo rm -f /usr/local/bin/bash-folders-video-optimizer && sudo mv bash-folders-video-optimizer /usr/local/bin && echo "🎉 Successfully installed! 🎉"

Test

bash-folders-video-optimizer --help

Run

bash-folders-video-optimizer --folder [folder to watch]

Example.

mkdir optimizer
bash-folders-video-optimizer --folder optimizer

And leave a video that you want to optimize in the folder optimizer.

Start at operating system startup

Option 1: Service

Create a file in /etc/systemd/system/bash-folders-video-optimizer.service with the following content.

[Unit]
Description=Folder that watches when new videos are added and optimizes them.

[Service]
Restart=always
RestartSec=5
User=[user]
ExecStart=bash-folders-video-optimizer --folder [folder to watch]

[Install]
WantedBy=multi-user.target

Edit it to your needs.

Recharge services.

sudo systemctl daemon-reload

And activate it.

sudo systemctl enable bash-folders-video-optimizer
sudo systemctl start bash-folders-video-optimizer

Option 2: Cron

Open.

crontab -e

Add to document.

@reboot bash-folders-video-optimizer --folder [folder to watch] >/dev/null 2>&1 &

Battery hook

Folder with custom scripts to be launched in different battery states.

The filename of the scripts, or your custom scripts, must be:

  • discharging: When the battery is in use.
  • charging: When the battery is charging.
  • low: When it reaches the low percentage. Default 15.
  • high: When it reaches the high percentage. Default 85.
  • full: When the battery is full.

They must have execution permissions. If any of them do not exist, they will be ignored.

Install

curl -o bash-folders-battery-hook https://raw.githubusercontent.com/tanrax/bash-folders/main/bash-folders-battery-hook.sh && chmod +x bash-folders-battery-hook && sudo rm -f /usr/local/bin/bash-folders-battery-hook && sudo mv bash-folders-battery-hook /usr/local/bin && echo "🎉 Successfully installed! 🎉"

Test

bash-folders-battery-hook --help

Run

bash-folders-battery-hook --folder [folder path]

Example.

mkdir battery-scripts

touch battery-scripts/discharging
chmod +x battery-scripts/discharging
touch battery-scripts/charging
chmod +x battery-scripts/charging
touch battery-scripts/low
chmod +x battery-scripts/low
touch battery-scripts/high
chmod +x battery-scripts/high
touch battery-scripts/full
chmod +x battery-scripts/full

bash-folders-battery-hook --folder battery-scripts

Start at operating system startup

Option 1: Service

Create a file in /etc/systemd/system/bash-folders-battery-hook.service with the following content.

[Unit]
Description=Folder with custom scripts to be launched in different battery states.

[Service]
Restart=always
RestartSec=5
User=[user]
ExecStart=bash-folders-battery-hook --folder [folder path]

[Install]
WantedBy=multi-user.target

Edit it to your needs.

Now you will need the script to run every so often to check the battery status. The best solution is to create a timer.

Create a file in /etc/systemd/system/bash-folders-battery-hook.timer with the following content.

[Unit]
Description=Folder with custom scripts to be launched in different battery states every minute.

[Timer]
OnCalendar=*-*-* *:*:00
Persistent=true

[Install]
WantedBy=timers.target

Recharge services.

sudo systemctl daemon-reload

And activate it.

sudo systemctl enable bash-folders-battery-hook.timer
sudo systemctl start bash-folders-battery-hook.timer

Option 2: Cron

Open.

crontab -e

Add to document.

* * * * * bash-folders-battery-hook --folder [folder path]

Development

Check syntax

shellcheck [script]