This yocto-based buildsystem uses a Docker container for the build of a Raspberry Pi zero-w image. The Dockerfile is located in folder docker and based on crop porky ubuntu-18.04 (https://github.com/crops/poky-container). The Docker image contains all tools to build with the OpenEmbedded/Yocto buildsystem. The workspace is created in a volume directory given by the the host.

The buildsystem uses the Google repo tool (https://android.googlesource.com/tools/repo) to setup the Yocto layer structure (i.e. checkout all repos).

To know, what to do, when you start the raspberry pi with the image sd card, please have a look at the wiki: https://github.com/yorns/zeroPlayerBuild/wiki/Get-started-and-work-with-the-zero-player

Checkout the right branch (start should be master branch).

git clone https://github.com/yorns/zeroPlayerBuild.git
cd zeroPlayerBuild

Build the Docker image:

cd docker
export WORKDIR=$HOME/tmp/workdir/
mkdir -p $WORKDIR
docker build . -t crops/poky
docker run --rm -it -v $WORKDIR:/workdir crops/poky --workdir=/workdir

In case you have set the docker environment, on a second run, you can do:

cd docker
export WORKDIR=$HOME/tmp/workdir/
docker run --rm -it -v $WORKDIR:/workdir crops/poky --workdir=/workdir

inside the running Docker container or on a host which has all required build host packages installed: https://www.yoctoproject.org/docs/current/yocto-project-qs/yocto-project-qs.html#packages

git config --global user.email "[email protected]"
git config --global user.name "Your Name"
repo init -u https://github.com/yorns/zeroPlayerBuild.git
repo sync
. setup-environment
bitbake zero-image

again, in case you are here for the second (or third ...) time:

repo sync
. setup-environment
bitbake zero-image

The final images are stored on the host at (please set WORKDIR variable in that environment if necessary) in $WORKDIR/build/tmp/deploy/images/raspberrypi0-wifi/zero-image-raspberrypi0-wifi.rpi-sdimg

sudo su
dd if=/home/yorn/tmp/workdir/build/tmp/deploy/images/raspberrypi0-wifi/zero-image-raspberrypi0-wifi.rpi-sdimg  of=/dev/mmcblk0 bs=1M status=progress

https://github.com/yorns/zeroPlayerBuild/wiki/Tips-and-Tweaks