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Build the project using Docker

A Docker image (Dockerfile) containing all the build environment is available for X86_64 and AMD64 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:

  • 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. For cloning the repo, see these instructions. 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

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

The image is built using 1000:1000 for the user id and group id. If this is different to your user or group ids (run id -u and id -g to find out what your id values are if you are unsure), you will need to override them via the --user parameter in order to prevent permission errors with the output files (and the cmake build cache).

Running with this image is the same as above, you just specify the ids to docker run

docker run --rm -it -v $(pwd):/sources --user $(id -u):$(id -g) pfeerick/infinitime-build

Or you can specify your user id and group id (by number, not by name) directly:

docker run --rm -it -v $(pwd):/sources --user 1234:1234 infinitime-build

Using the image from Docker Hub

The image is avaiable via Docker Hub for both the amd64 and arm64v8 architectures at pfeerick/infinitime-build.

It can be pulled (downloaded) using the following command:

docker pull pfeerick/infinitime-build

The default latest tag should automatically identify the correct image architecture, but if for some reason Docker does not, you can specify it manually:

  • For AMD64 (x86_64) systems: docker pull pfeerick/infinitime-build:amd64

  • For ARM64v8 (ARM64/aarch64) systems: docker pull pfeerick/infinitime-build:arm64v8

Build the image

You can build the image yourself if you like!

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 PUID and PGID build arguments are used to set the user and group ids used in the container, meaning you will not need to specify it later unless they change for some reason. Specifying them is not mandatory, as this can be over-ridden at build time via the --user flag, but doing so will make the command you need to run later a bit shorter. In the below examples, they are set to your current user id and group id automatically. You can specify them manually, but they must be specified by number, not by name.

docker image build -t infinitime-build --build-arg PUID=$(id -u) --build-arg PGID=$(id -g) ./docker