Autoredshift

A tool to automatically adjust screen temperature based on a custom curve.

Autoredshift allows you to define a custom temperature curve throughout the day and automatically adjusts your screen's color temperature using redshift. It includes a graphical configuration tool to easily edit your curve.

Prerequisites

• Linux (tested on X11)
• Redshift: Ensure redshift is installed and in your PATH.

  sudo apt install redshift  # Debian/Ubuntu
  sudo pacman -S redshift    # Arch Linux
  sudo dnf install redshift  # Fedora

• Rust/Cargo: Only if you build the project yourself.

Installation

1. Clone the repository or download the source.
2. Install using Cargo:

   cargo install --path .

   This will install the autoredshift binary to your Cargo bin directory (usually ~/.cargo/bin).

Install from GitHub Releases

Note: The automated release workflow currently produces a single x86_64 binary.

1. Download the latest autoredshift asset from the Releases page.
2. Make it executable (and optionally run it in-place):

   chmod +x autoredshift
   ./autoredshift --version

3. Move it somewhere on your PATH:

   mkdir -p ~/.local/bin
   mv autoredshift ~/.local/bin/

4. Ensure ~/.local/bin (or wherever you placed it) is on your PATH, reload your shell, and invoke the tool:

   autoredshift --version

Usage

Run Manually

To calculate the current target temperature and apply it immediately:

autoredshift

Configuration

To open the graphical configuration editor:

autoredshift --config

• Double-click to add a point.
• Right-click to remove a point.
• Drag points to adjust the curve.
• Scroll to zoom.

Automation

To have Autoredshift run automatically every minute, you can add a cron job.

1. Open your crontab:

   crontab -e

2. Add the following line (replace <user> with your username and verify paths):

   * * * * * DISPLAY=:0 XAUTHORITY=/run/lightdm/<user>/xauthority /home/<user>/.cargo/bin/autoredshift >> /home/<user>/autoredshift.log 2>&1

   Note:

   • DISPLAY=:0 is standard for most X11 setups.
   • XAUTHORITY path may vary depending on your display manager (e.g., /home/<user>/.Xauthority or /run/user/<uid>/gdm/Xauthority). Check echo $XAUTHORITY in your terminal.
   • Ensure the path to autoredshift matches where cargo install placed it.