Attention: Here be dragons (unstable version)
This is the latest
(unstable) version of this documentation, which may document features
not available in or compatible with released stable versions of Redot.
Checking the stable version of the documentation...
Command line tutorial
Some developers like using the command line extensively. Redot is designed to be friendly to them, so here are the steps for working entirely from the command line. Given the engine relies on almost no external libraries, initialization times are pretty fast, making it suitable for this workflow.
Note
On Windows and Linux, you can run a Redot binary in a terminal by specifying its relative or absolute path.
On macOS, the process is different due to Redot being contained within an
.app bundle (which is a folder, not a file). To run a Redot binary
from a terminal on macOS, you have to cd to the folder where the Redot
application bundle is located, then run Godot.app/Contents/MacOS/Godot
followed by any command line arguments. If you've renamed the application
bundle from Godot to another name, make sure to edit this command line
accordingly.
Command line reference
Legend
Available in editor builds, debug export templates and release export templates.
Available in editor builds and debug export templates only.
Only available in editor builds.
Note that unknown command line arguments have no effect whatsoever. The engine will not warn you when using a command line argument that doesn't exist with a given build type.
General options
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Run options
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Display options
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Debug options
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Standalone tools
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Path
It is recommended to place your Redot editor binary in your PATH environment
variable, so it can be executed easily from any place by typing redot.
You can do so on Linux by placing the Redot binary in /usr/local/bin and
making sure it is called redot (case-sensitive).
To achieve this on Windows or macOS easily, you can install Redot using
Scoop (on Windows) or Homebrew
(on macOS). This will automatically make the copy of Redot installed
available in the PATH:
# Add "Extras" bucket
scoop bucket add extras
# Standard editor:
scoop install godot
# Editor with C# support (will be available as `godot-mono` in `PATH`):
scoop install godot-mono
# Standard editor:
brew install godot
# Editor with C# support (will be available as `godot-mono` in `PATH`):
brew install godot-mono
Setting the project path
Depending on where your Redot binary is located and what your current working directory is, you may need to set the path to your project for any of the following commands to work correctly.
When running the editor, this can be done by giving the path to the project.godot file
of your project as either the first argument, like this:
redot path_to_your_project/project.godot [other] [commands] [and] [args]
For all commands, this can be done by using the --path argument:
redot --path path_to_your_project [other] [commands] [and] [args]
For example, the full command for exporting your game (as explained below) might look like this:
redot --headless --path path_to_your_project --export-release my_export_preset_name game.exe
When starting from a subdirectory of your project, use the --upwards argument for Redot to
automatically find the project.godot file by recursively searching the parent directories.
For example, running a scene (as explained below) nested in a subdirectory might look like this when your working directory is in the same path:
redot --upwards nested_scene.tscn
Creating a project
Creating a project from the command line can be done by navigating the
shell to the desired place and making a project.godot file.
mkdir newgame
cd newgame
touch project.godot
The project can now be opened with Redot.
Running the editor
Running the editor is done by executing Redot with the -e flag. This
must be done from within the project directory or by setting the project path as explained above,
otherwise the command is ignored and the Project Manager appears.
redot -e
When passing in the full path to the project.godot file, the -e flag may be omitted.
If a scene has been created and saved, it can be edited later by running the same code with that scene as argument.
redot -e scene.tscn
Erasing a scene
Redot is friends with your filesystem and will not create extra metadata files.
Use rm to erase a scene file. Make sure nothing references that scene.
Otherwise, an error will be thrown upon opening the project.
rm scene.tscn
Running the game
To run the game, execute Redot within the project directory or with the project path as explained above.
godot
Note that passing in the project.godot file will always run the editor instead of running the game.
When a specific scene needs to be tested, pass that scene to the command line.
redot scene.tscn
Debugging
Catching errors in the command line can be a difficult task because they
scroll quickly. For this, a command line debugger is provided by adding
-d. It works for running either the game or a single scene.
redot -d
redot -d scene.tscn
Exporting
Exporting the project from the command line is also supported. This is especially useful for continuous integration setups.
Note
Using the --headless command line argument is required on platforms
that do not have GPU access (such as continuous integration). On platforms
with GPU access, --headless prevents a window from spawning while the
project is exporting.
# `godot` must be a Redot editor binary, not an export template.
# Also, export templates must be installed for the editor
# (or a valid custom export template must be defined in the export preset).
redot --headless --export-release "Linux/X11" /var/builds/project
redot --headless --export-release Android /var/builds/project.apk
The preset name must match the name of an export preset defined in the
project's export_presets.cfg file. If the preset name contains spaces or
special characters (such as "Windows Desktop"), it must be surrounded with quotes.
To export a debug version of the game, use the --export-debug switch instead
of --export-release. Their parameters and usage are the same.
To export only a PCK file, use the --export-pack option followed by the
preset name and output path, with the file extension, instead of
--export-release or --export-debug. The output path extension determines
the package's format, either PCK or ZIP.
Warning
When specifying a relative path as the path for --export-release, --export-debug
or --export-pack, the path will be relative to the directory containing
the project.godot file, not relative to the current working directory.
Running a script
It is possible to run a .gd script from the command line.
This feature is especially useful in large projects, e.g. for batch
conversion of assets or custom import/export.
The script must inherit from SceneTree or MainLoop.
Here is an example sayhello.gd, showing how it works:
#!/usr/bin/env -S redot -s
extends SceneTree
func _init():
print("Hello!")
quit()
And how to run it:
# Prints "Hello!" to standard output.
redot -s sayhello.gd
If no project.godot exists at the path, current path is assumed to be the
current working directory (unless --path is specified).
The first line of sayhello.gd above is commonly referred to as
a shebang. If the Redot binary is in your PATH as redot,
it allows you to run the script as follows in modern Linux
distributions, as well as macOS:
# Mark script as executable.
chmod +x sayhello.gd
# Prints "Hello!" to standard output.
./sayhello.gd
If the above doesn't work in your current version of Linux or macOS, you can always have the shebang run Redot straight from where it is located as follows:
#!/usr/bin/redot -s