requirements_extra.json

{
    "features": {
        "gpio": {
            "description": [
                "enables opsi.gpio module",
                "cross platform",
                "no effect unless on raspberry pi"
            ],
            "packages": [
                "colorzero==1.1",
                "gpiozero==1.5.1"
            ]
        },
        "gpu": {
            "description": [
                "enables opsi.gpu",
                "accelerated image processing",
                "requires Nvidia GPU + CUDA toolkit",
                "installations are varied, so there's no specified version"
            ],
            "packages": [
                "cupy"
            ]
        },
        "h264": {
            "description": [
                "h264 functionality in cameraserver",
                "requires linux"
            ],
            "packages": [
                "upgraded-engineer==0.2.1"
            ]
        },
        "imutils": {
            "description": [
                "enables image rotation",
                "requires opencv installed"
            ],
            "packages": [
                "imutils==0.5.3"
            ]
        },
        "opencv": {
            "description": [
                "all image processing",
                "cross platform",
                "linux: do not install if using distro python3-opencv 4.x"
            ],
            "packages": [
                "opencv-python==4.2.0.34"
            ]
        },
        "systemd": {
            "description": [
                "manage systemctl service",
                "used in the deb packages, not needed for development",
                "requires linux"
            ],
            "packages": [
                "pystemd==0.7.0"
            ]
        },
        "uvloop": {
            "description": [
                "general async speedup",
                "requires linux"
            ],
            "packages": [
                "uvloop==0.14.0"
            ]
        }
    },
    "overlays": {
        "base": {
            "add": [
                "gpio",
                "imutils",
                "opencv"
            ],
            "remove": []
        },
        "linux": {
            "extends": "base",
            "add": [
                "h264",
                "uvloop"
            ],
            "remove": []
        },
        "packages": {
            "extends": "linux",
            "add": [
                "systemd"
            ],
            "remove": [
                "opencv"
            ]
        }
    }
}