InfiniTime/doc/buildWithDocker.md

Build the project using Docker

There are Docker images (Dockerfile) containing the build environment for AMD64 (x86_64) and ARM64 architectures. These images make the build of the firmware and the generation of the DFU file for OTA quite easy, as well as preventing clashes with any other toolchains or development environments you may have installed.

Based on Ubuntu 18.04 with the following build dependencies:

When this is done, a new image named infinitime-build is available.

• ARM GCC Toolchain
• nRF SDK
• MCUBoot
• adafruit-nrfutil

Run a container to build the project:

The infinitime-build image contains all the dependencies you need. The default CMD will compile sources found in /sources, so you need only mount your code.

This example will build the firmware, generate the MCUBoot image and generate the DFU file. Outputs will be written to <project_root>/build/output:

$ cd <project_root> # e.g. cd ./work/Pinetime
$ docker run --rm -it -v $(pwd):/sources infinitime-build

• --rm to delete the container after we're done. Build cache will be written out to host disk, so no worries.
• -it for better interactivity with the running container.
  • -i Interactive - required if you want to send CTRL+C
  • -t TTY - This lets colours work nicely etc?
• -v for mounting a volume to the container

Output files (and the cmake build cache) will have uid/gid not matching your host user. To override them, use docker run like this:

$ docker run --rm -it -v $(pwd):/sources \
    -e USER_ID=$(id -u) -e GROUP_ID=$(id -g) \
    infinitime-build

If you only want to build a single CMake target, you can pass it in as the first parameter to the build script. This means calling the script explicitly as it will override the CMD. Here's an example For pinetime-app:

$ docker run --rm -it -v $(pwd):/sources infinitime-build /opt/build.sh pinetime-app

Build the image

The image is not (yet) available on DockerHub, you need to build it yourself, but that is quite easy. The following commands must be run from the root of the project. This operation will take some time but, when done, a new image named infinitime-build is available.

$ docker image build -t infinitime-build ./docker

The resulting

You can bake your custom USER_ID and GROUP_ID numbers in to the image, then you don't have to pass them to docker run every time.

docker image build -t infinitime-build \
    --build-arg USER_ID=$(id -u) \
    --build-arg GROUP_ID=$(id -g) \
    ./docker