7969dfd5a1
While it seems elegant and intuitive to use separate bootfs and rootfs mountpoints for compressing the partitions, doing so violates a precondition of unmount_image that they be mounted as a tree. This causes the image to not be properly unmounted and detached. A better solution might be to pack up the previous stage's chroot directory, but that rework can wait for the time being. scripts/common.sh: Output device name correctly A micplaced ) in unmount_image caused the loop device to be incorrectly identified, resulting in a fair bit of chaos trying to unmount other filesystems on /dev/mapper devices. Such as / on a LUKS-encrypted installation, for example. The unmount will fail as it should and build.sh will abort the build without any cleanup. Best to avoid that. These changes close RPi-Distro/pi-gen#19 |
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|---|---|---|
| export-image | ||
| export-noobs | ||
| scripts | ||
| stage0 | ||
| stage1 | ||
| stage2 | ||
| stage3 | ||
| stage4 | ||
| .gitignore | ||
| build.sh | ||
| depends | ||
| License.md | ||
| README.md | ||
#TODO
- Simplify running a single stage
- 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, the name of the distribution to build (required)APT_PROXY, proxy/cache URL to be included in the build
A simple example for building Raspbian:
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.
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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 installsraspberrypi-bootloaderwhich 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-essentialpackage. 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.
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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.