87 lines
3.7 KiB
Markdown
87 lines
3.7 KiB
Markdown
#TODO
|
|
|
|
1. Documentation
|
|
|
|
#Dependencies
|
|
|
|
`quilt kpartx realpath qemu-user-static debootstrap zerofree pxz zip`
|
|
|
|
#Config
|
|
|
|
Upon execution, `build.sh` will source the file `config` in the current
|
|
working directory. This bash shell fragment is intended to set needed
|
|
environment variables.
|
|
|
|
The following environment variables are supported:
|
|
|
|
* `IMG_NAME` **required** (Default: unset)
|
|
|
|
The name of the image to build with the current stage directories. Setting
|
|
`IMG_NAME=Raspbian` is logical for an unmodified RPi-Distro/pi-gen build,
|
|
but you should use something else for a customized version. Export files
|
|
in stages may add suffixes to `IMG_NAME`.
|
|
|
|
* `APT_PROXY` (Default: unset)
|
|
|
|
If you require the use of an apt proxy, set it here. This proxy setting
|
|
will not be included in the image, making it safe to use an `apt-cacher` or
|
|
similar package for development.
|
|
|
|
A simple example for building Raspbian:
|
|
|
|
```bash
|
|
IMG_NAME='Raspbian'
|
|
```
|
|
|
|
#Stage Anatomy
|
|
|
|
|
|
|
|
#Raspbian Stage Overview
|
|
|
|
The build of Raspbian is divided up into several stages for logical clarity
|
|
and modularity. This causes some initial complexity, but it simplifies
|
|
maintenance and allows for more easy customization.
|
|
|
|
- Stage 0, bootstrap. The primary purpose of this stage is to create a
|
|
usable filesystem. This is accomplished largely through the use of
|
|
`debootstrap`, which creates a minimal filesystem suitable for use as a
|
|
base.tgz on Debian systems. This stage also configures apt settings and
|
|
installs `raspberrypi-bootloader` which is missed by debootstrap. The
|
|
minimal core is installed but not configured, and the system will not quite
|
|
boot yet.
|
|
|
|
- Stage 1, truly minimal system. This stage makes the system bootable by
|
|
installing system files like `/etc/fstab`, configures the bootloader, makes
|
|
the network operable, and installs packages like raspi-config. At this
|
|
stage the system should boot to a local console from which you have the
|
|
means to perform basic tasks needed to configure and install the system.
|
|
This is as minimal as a system can possibly get, and its arguably not
|
|
really usable yet in a traditional sense yet. Still, if you want minimal,
|
|
this is minimal and the rest you could reasonably do yourself as sysadmin.
|
|
|
|
- State 2, lite system. This stage produces the Raspbian-Lite image. It
|
|
installs some optimized memory functions, sets timezone and charmap
|
|
defaults, installs fake-hwclock and ntp, wifi and bluetooth support,
|
|
dphys-swapfile, and other basics for managing the hardware. It also
|
|
creates necessary groups and gives the pi user access to sudo and the
|
|
standard console hardware permission groups.
|
|
|
|
There are a few tools that may not make a whole lot of sense here for
|
|
development purposes on a minimal system such as basic python and lua
|
|
packages as well as the `build-essential` package. They are lumped right
|
|
in with more essential packages presently, though they need not be with
|
|
pi-gen. These are understandable for Raspbian's target audience, but if
|
|
you were looking for something between truly minimal and Raspbian-lite,
|
|
here's where you start trimming.
|
|
|
|
- Stage 3, desktop system. Here's where you get the full desktop system
|
|
with X11 and LXDE, web browsers, git for development, Raspbian custom UI
|
|
enhancements, etc. This is a base desktop system, with some development
|
|
tools installed.
|
|
|
|
- Stage 4, complete Raspbian system. More development tools, an email
|
|
client, learning tools like Scratch, specialized packages like sonic-pi and
|
|
wolfram-engine, system documentation, office productivity, etc. This is
|
|
the stage that installs all of the things that make Raspbian friendly to
|
|
new users.
|