abc3e45727
* build.sh: Support comments in package files This patch allows the use of hash comments inside patch files. It's a little ugly, but it strips comments and collapses all whitespace down to single space characters between package names. It handles comments anywhere in a line, as well. Was unsure if \ continuation of the long sed line or the inclusion of a couple of lines of comments explaining what the sed expressions are doing would be appreciated, so didn't include them in this patch. * build.sh: whitespace fix * build.sh: Use sed script for packages files Broke the sed expressions out of build.sh and put them their own documented sed script. This greatly improves readability and avoids build.sh getting messier. Broke the substitution command into two separate subs. The first just deletes comments, and the second collapses all whitespace into a single space. This too is easier to read, and catches a couple of edge cases that would result it not all whitespace being collapsed. The result may still have (one) leading and/or trailing space, which is acceptable. |
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| export-image | ||
| export-noobs | ||
| scripts | ||
| stage0 | ||
| stage1 | ||
| stage2 | ||
| stage3 | ||
| stage4 | ||
| .gitignore | ||
| build.sh | ||
| README.md | ||
#TODO
- Simplify running a single stage
- Documentation
#Dependencies
quilt kpartx realpath qemu-user-static debootstrap zerofree pxz
#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, large packages like LibreOffice, email, sonic-pi, wolfram-engine, etc. All the things.