uci-docker-build/readme.md

# UCI Docker Image Builder

Prerequistes:  

see https://hacking.kebler.net/Linux/Arch/docker/



<!-- assuming your current (dev) user is in the docker group
for linking into volumes for the try command
```
sudo chown -R :docker /var/lib/docker
sudo chmod -R g+r docker /var/lib/docker
``` -->



A build script plus associated library to facilitate building docker linux images using any of four distros (arch,alpine,debian,ubuntu) and either architecture (amd64/arm64) 

The Dockerfile is minimal copying a directory and then calling a packages script and and init script in two RUN statements calling a set of distro specific scripts and common scripts in order to build the image

The build environment makes user of docker's  "buildx bake" commands and a docker-bake.hcl file

The master branch is configured to build base images from the docker hub distro base images

The main script is "build" At the very minimum run as just `./build` it will build an alpine image from the docker hub official alpine latest image with a minimal set of packages installed (e.g. git) and a custom uci shell environment.

To run the ./build script from other repos install it using the install script

'./install

The repo also supports (with scripts) pushing to alternate private repositories packages (like a self hosted gitea or github)

One can make decendent images in one of two ways. 

1. Make your base images on the master branch (or a branch if you need to customize)
2. User the installer script (./install) to link the build script into your system path.  Then clone the template branch
3. 


the build script requires an init.sh file in a source directory for the scripts it will run while building a new image
by default that is `<source directory>/init.sh`.  by default that source directory is `src/` relative to the current directory


run 

`./build -h`

for help

also see examples folder for example build environment file (more help details)