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A yocto build script for the raspberry pi

License: MIT License

Shell 100.00%

yocto-project bash build-system raspberry-pi bitbake

aathub-yocto's Introduction

aathub yocto

A build system without any of the bullshit

Synopsis

Setups a development environment, compiles a yocto-based image, and optionally uploads the results to S3.

Resources

Don't know anything about yocto? Read these:

How to use

Simple

Kick off the build process with the following command:

./bootstrap.sh

Advanced

Sourcing bootstrap.sh is only necessary if passing in the -s param.

. ./bootstrap.sh -v -s -u bender -b /path/to/directory

Here's a breakdown:

-v enable verbose output
-s upload compiled results to S3
-u bender is an arbitrary user, used to execute bitbake. If the user doesn't exist one is created
-b /path/to/directory parent directory where compilation occurs (the default is /tmp)

For the most up-to-date instructions run the following command:

./bootstrap.sh -h

Testing

If oe-init-build-env isn't sourced, do so now

runqemu path/to/kernel-image.bin path/to/root-filesystem.ext3

Things to consider

The build takes 2 hours to compile on a c4.2xlarge, and requires upwards of 50GB of free space.
This has been sucessfully tested on ubuntu/debian and fedora.
We base64 a few files used in shippable's secure variables. Use the following command base64 -w 0 /path/to/file
The build system depends on meta-aatlive, a closed-source bitbake layer
PR builds will fail since secure variables aren't initalized. You have been warned...

aathub-yocto's People

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egladman imrulkk89

aathub-yocto's Issues

Mount root filesystem read-only

The root filesystem will need to mounted read-only. docs

Include additional files in sha256sums

I believe i need to generate a sha256sums for additional files, before they are uploaded to s3. Currently we're use ls to select the required files, however this is no longer cutting it. Robust regex is now required.

Write custom yocto layer

This is where we will customize the os, and install additional packages

Change the init system to systemd

The default init system is sysvinit. I previously added the following code into bootstrap.sh to enable systemd, however it introduced a fatal bug (the build would compile but the result dir was absent). More testing needs to occur.

#Use systemd instead of SysVinit
#http://www.yoctoproject.org/docs/current/dev-manual/dev-manual.html#selecting-an-initialization-manager
cat << EOF > "${YOCTO_TEMP_DIR}"/poky/meta-poky/conf/distro/poky.conf
DISTRO_FEATURES_append = " systemd"
VIRTUAL-RUNTIME_init_manager = "systemd"

#Prevent the SysVinit distribution feature from being automatically enabled
DISTRO_FEATURES_BACKFILL_CONSIDERED = "sysvinit"

#Remove initscripts
VIRTUAL-RUNTIME_initscripts = ""
EOF