Skip to content


Repository files navigation


A Game Maker Studio 2 dependency manager.


Build Status Coverage HitCount

Table of contents:


Catalyst is a tool to manage dependencies within GameMakerStudio2 projects, and speed up certain processes. If you need a library inside of your project you can use this tool to declare the dependency and install all dependencies. The dependencies will be recursively solved, so multiple libraries can require multiple dependencies, and they can be shared.

Installing dependencies will exclude them (to the best extent possible) from version control, keeping your source code clean. Unfortunately, due to the format of Game Maker Studio 2 project, there will be some changes in the main project file as well as some view files.

Inside the GameMaker project, all external files (vendored files) will reside in the vendor folders.

Read a simple "Get Started" guide here


When other people check out your source, and it requires dependencies, it will not run. They will first have to run catalyst install to download and install the dependencies to the project.

This way we can make sure that vendored code is not included in version control. Stating the obvious: files inside of the vendor folders should never be edited, as your changes are not included in VCS. If you want to make changes to a vendored file, you will have to make a merge request for that package, and use that. This way, everybody can profit from the upgrades!



You can download a ready-to-run installer from the releases page. This installer will install the Catalyst source, along with its dependencies, so you can simply run it. It will also add the executable to your path, so you can run the catalyst program from anywhere.

Windows (from source)

You want to install PHP7.0+ and you might want to install a tool like Git Bash (that also has MINGW). This way you have a nice Linux-style CLI which you can work with.

If the command "php -v" doesn't work (can't find PHP) open up Git Bash as an admininistrator, and create the file "/usr/bin/php" with following contents:

/c/php7.3/php.exe ${@:1:99}

where /c/php7.3/php.exe is your PHP's location ofcourse.

You also need to make sure you have added the following lines to the php.ini if they don't yet exist:


You also need to install composer (or download the .phar file into this directory), and then run composer install (or php ./composer.phar install if you dont have it installed)

Linux and OSX

Make sure you have PHP7.3 and Composer installed. Clone this repository, run a composer install in this directory, and then you can use it.


The windows installer adds catalyst to the path by default. You can run catalyst by typing it anywhere in the command line.

If you haven't got catalyst in your path (linux or OSX), you can execute the index.php file manually.

Install requirements

First initialize your project with Catalyst by writing a catalyst.json file, or using catalyst init.

Write requirements into the file, or use catalyst require <pacakgename>.

Run catalyst install to install all dependencies.

Local directories as packages

If you don't want to share packages, you can add a directory repository in your catalyst.json file. Make sure that the project folders inside of the given folder contain a catalyst.json file! Since there is no version information available through this setup, the system assumes "1.0.0". So if you want to require the package ../private-projects/My Tools/My Tools.yyp you'll have create a catalyst.json with "name": "private/my-tools" and then run catalyst require private/my-tools in your main project, using a constraint that satisfies 1.0.0; for example * or >=1.0. You can mix multiple repositories.

We now only support 1 extra type of repository, which is directory. So the format here is;

"repositories": {
    "<relative file path>": "directory"

Example catalyst.json file:

    "name": "dukesoft/other-project",
    "description": "Other project",
    "license": "MIT",
    "homepage": "",
    "yyp": "OtherProject.yyp",
    "repositories": {
      "../private-projects": "directory"
    "require": {
        "private/my-tools": "*",
        "dukesoft/dscpu-mercy": ">=1.2"

The private/my-tools is just an arbitrary name for your private package. It can be anything you want, but must conform the Catalyst package name format. floop/doople would work too - as long as it matches the catalyst.json file in your private project.

Ignore files to be installed

Sometimes you can have a package that contains some non-related files for distribution. Testcases, test sprites, example rooms and whatnot can be resources that the users of a package do not need.

There are 3 types of "ignorable" resources. resource, group and all.

You can use the shell wildcard pattern to mark resources from being installed into projects;

wildcard Explaination Example Matches
* Matches any, zero or more characters test_* test_initialize
? Matches any single character ???_test obj_test, spr_test
[string] Matches exactly one character that is a member of the string string. This is called a character class. As a shorthand, string may contain ranges, which consist of two characters with a dash between them. For example, the class [a-z0-9_] matches a lowercase letter, a number, or an underscore. You can negate a class by placing a ! or ^ immediately after the opening bracket. Thus, [^A-Z@] matches any character except an uppercase letter or an at sign. obj_gr[ae]y obj_grey, obj_gray
\ Escape character. Removes the special meaning of the character following it group name\? group name?


    "name": "dukesoft/other-project",
    "description": "Other project",
    "license": "MIT",
    "homepage": "",
    "yyp": "OtherProject.yyp",
    "ignore": {
        "spr_to_ignore": "resource",
        "group_to_ignore": "group",
        "test_*": "all",
        "*_test2": "resource",
        "*_test3": "group"

When installing this package, everything matching the rules in the ignore part, will not be installed into the package.


catalyst help will display all commands and information

Argument Options Explaination Example
-h, --help Shows help catalyst -h
-q, --quiet Do not output any message catalyst -q
-V, --version Display this application version catalyst --version
--ansi Force ANSI output catalyst --ansi
--no-ansi Disable ANSI output catalyst --no-ansi
-n, --no-interaction Do not ask any interactive question catalyst -n
-v, -vv, -vvv, --verbose Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug catalyst -vvv
---------- --------- -------------- ---------
clean Remove all installed dependencies catalyst clean
help Displays help for a command catalyst help install
init Initialize a project in the current folder catalyst init
install Install all dependencies catalyst install
require Require a package catalyst require gamemakerhub/extended-functions@^1.0
tree Outputs a tree view of all assets in the project catalyst tree
resources Lists all the resources in the project catalyst resources