zmk/scripts/readme.md
2023-03-31 23:37:39 -04:00

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This folder contains scripts that automate installing and building using a
local toolchain. The scripts provide an alternative to using [Github
Actions](https://zmk.dev/docs/user-setup#installing-the-firmware) and the
[developer toolchain](https://zmk.dev/docs/development/setup).
If the zmk-config repo contains a `combos.dtsi` file, the script will also automatically
update the `MAX_COMBOS_PER_KEY` and `MAX_KEYS_PER_COMBO` settings for all boards,
depending on the combos specified in `combos.dtsi`.
## Build steps
### 1. Clone the ZMK repository
Clone the ZMK repository and checkout the branch that you want to build
against. By default the build script will look for the ZMK repo in `~/zmk`.
Other locations can be specified with `--host-zmk-dir` or by changing the
default location for `HOST_ZMK_DIR` inside the script.
For example, to build against my `main-3.2` branch, run:
```bash
cd "$HOME"
git clone https://github.com/urob/zmk
git checkout main-3.2
```
### 2. Clone your zmk-config repository
By default the build script will look for the zmk-config repo in
`~/zmk-config`. Other locations can be specified with `--host-config-dir` or by
changing the default location for `HOST_CONFIG_DIR` inside the script.
For example, to use my zmk-config repo, run:
```bash
cd "$HOME"
git clone https://github.com/urob/zmk-config
```
### 3. Install the build requisites
The build script can be used to install either a "docker" or a "local"
toolchain. If unsure, I recommend using the docker toolchain. Depending on your
installation choice, do **one** of the following:
1. Install Docker or Podman (recommended) and, if using Podman, configure the docker
registry. On Debian or Ubuntu, you can do both by running:
```bash
sudo apt-get install podman
echo 'unqualified-search-registries = ["docker.io"]' > $XDG_CONFIG_HOME/containers/registries.conf
```
2. Install a local [developer
toolchain](https://zmk.dev/docs/development/setup). The
`zmk_local_install.sh` script in this repository automates the process for
Debian-based operating system.
### 4. Run the build script
Run the `zmk_build.sh` script to build your boards. By default, the script will
build all boards specified in `build.yaml` in your `zmk-config` repo. The default can be
overwritten with the `-b` option.
If using docker/podman, the script will pull down the required dependencies the first
time it is used. The script will automatically detect whether the build
requirement have changed, and will only re-download the dependencies if needed.
In order to easily switch between multiple ZMK branches that have different
build requirements, one can specify the desired Zephyr version using the `-v`
option. Docker container and volumes are index by the Zephyr version, so
switching between Zephyr version won't require re-downloading new dependencies.
In order to force re-installing all build requirements, pass the `-c` option, which will
wipe out the Docker container and volume.
By default the script will copy the firmware into the `OUTPUT_DIR` folder
specified in the script. Other locations can be specified using the
`--output-dir` argument.
To switch between Docker and Podman, set the `DOCKER_BIN` variable in the
script (defaults to `podman`). If using Docker and the user is not in the
docker-group, then one can use Docker in sudo-mode by using the `-s` flag for
the script. If using Podman, running in rootless mode is recommended.
One can pass custom options to `west` by preluding them with `--`.
For example, to build my boards using Zephyr version 3.2 in sudo mode and pass
the "pristine" option to west, run:
```bash
zmk_build.sh -s -v 3.2 -- -p
```
See the script for a full set of options.
## Developing interactively using Docker
The docker container can be entered interactively using with all the necessary
mounts using: The script shares a build environment with the build script
(again indexed by Zephyr versions).
For example, to start an interactive Docker session in sudo mode using Zephyr
version 3.2, run:
```bash
zmk_run_docker.sh -s -v 3.2
```