I am trying to create an installer which will download the source of the latest release of a Unity project from a repository hosted on Github and then build it into an executable file. I have tried looking online for a solution, but, they all require the Unity Editor to be installed.

Is it possible to build a Unity project from the source code into a .exe file or a .dmg file without the Unity Editor?

EDIT: From @DMGregory's answer, it seems that using an external tool to build Unity Projects will violate Unity's Terms of Service. Therefore, I am updating the question.

Does Unity provide a lightweight (installer) tool that can allow clients to build and install Unity projects from source rather than requiring the client to install the entire Unity Editor?

I am trying to create an installer which will download the source of the latest release of a Unity project from a repository hosted on Github and then build it into an executable file. I have tried looking online for a solution, but, they all require the Unity Editor to be installed.

Is it possible to build a Unity project from the source code into a .exe file or a .dmg file without the Unity Editor?

From @DMGregory's answer, it seems that using an external tool to build Unity Projects will violate Unity's Terms of Service. Therefore, I am updating the question:

Does Unity provide a lightweight (installer) tool that can allow clients to build and install Unity projects from source rather than requiring the client to install the entire Unity Editor?

I am trying to create an installer which will download the source of the latest release of a Unity project from a repository hosted on Github and then build it into an executable file. I have tried looking online for a solution, but, they all require the Unity Editor to be installed.

Is it possible to build a Unity project from the source code into a .exe file or a .dmg file without the Unity Editor?

I am trying to create an installer which will download the source of the latest release of a Unity project from a repository hosted on Github and then build it into an executable file. I have tried looking online for a solution, but, they all require the Unity Editor to be installed.

Is it possible to build a Unity project from the source code into a .exe file or a .dmg file without the Unity Editor?

EDIT: From @DMGregory's answer, it seems that using an external tool to build Unity Projects will violate Unity's Terms of Service. Therefore, I am updating the question.

Does Unity provide a lightweight (installer) tool that can allow clients to build and install Unity projects from source rather than requiring the client to install the entire Unity Editor?