ChillcraftOS/docs/config.md

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 (Default: raspios-$RELEASE-$ARCH, for example: raspios-bookworm-armhf)

  The name of the image to build with the current stage directories. Use this variable to set the root name of your OS, eg IMG_NAME=Frobulator. Export files in stages may add suffixes to IMG_NAME.

• PI_GEN_RELEASE (Default: Raspberry Pi reference)

  The release name to use in /etc/issue.txt. The default should only be used for official Raspberry Pi builds.

• RELEASE (Default: bookworm)

  The release version to build images against. Valid values are any supported Debian release. However, since different releases will have different sets of packages available, you'll need to either modify your stages accordingly, or checkout the appropriate branch. For example, if you'd like to build a bullseye image, you should do so from the bullseye branch.

• 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.

• BASE_DIR (Default: location of build.sh)

  CAUTION: Currently, changing this value will probably break build.sh

  Top-level directory for pi-gen. Contains stage directories, build scripts, and by default both work and deployment directories.

• WORK_DIR (Default: $BASE_DIR/work)

  Directory in which pi-gen builds the target system. This value can be changed if you have a suitably large, fast storage location for stages to be built and cached. Note, WORK_DIR stores a complete copy of the target system for each build stage, amounting to tens of gigabytes in the case of Raspbian.

  CAUTION: If your working directory is on an NTFS partition you probably won't be able to build: make sure this is a proper Linux filesystem.

• DEPLOY_DIR (Default: $BASE_DIR/deploy)

  Output directory for target system images and NOOBS bundles.

• DEPLOY_COMPRESSION (Default: zip)

  Set to:

  • none to deploy the actual image (.img).
  • zip to deploy a zipped image (.zip).
  • gz to deploy a gzipped image (.img.gz).
  • xz to deploy a xzipped image (.img.xz).

• DEPLOY_ZIP (Deprecated)

  This option has been deprecated in favor of DEPLOY_COMPRESSION.

  If DEPLOY_ZIP=0 is still present in your config file, the behavior is the same as with DEPLOY_COMPRESSION=none.

• COMPRESSION_LEVEL (Default: 6)

  Compression level to be used when using zip, gz or xz for DEPLOY_COMPRESSION. From 0 to 9 (refer to the tool man page for more information on this. Usually 0 is no compression but very fast, up to 9 with the best compression but very slow ).

• USE_QEMU (Default: 0)

  Setting to '1' enables the QEMU mode - creating an image that can be mounted via QEMU for an emulated environment. These images include "-qemu" in the image file name.

• LOCALE_DEFAULT (Default: 'en_GB.UTF-8' )

  Default system locale.

• TARGET_HOSTNAME (Default: 'raspberrypi' )

  Setting the hostname to the specified value.

• KEYBOARD_KEYMAP (Default: 'gb' )

  Default keyboard keymap.

  To get the current value from a running system, run debconf-show keyboard-configuration and look at the keyboard-configuration/xkb-keymap value.

• KEYBOARD_LAYOUT (Default: 'English (UK)' )

  Default keyboard layout.

  To get the current value from a running system, run debconf-show keyboard-configuration and look at the keyboard-configuration/variant value.

• TIMEZONE_DEFAULT (Default: 'Europe/London' )

  Default time zone.

  To get the current value from a running system, look in /etc/timezone.

• FIRST_USER_NAME (Default: pi)

  Username for the first user. This user only exists during the image creation process. Unless DISABLE_FIRST_BOOT_USER_RENAME is set to 1, this user will be renamed on the first boot with a name chosen by the final user. This security feature is designed to prevent shipping images with a default username and help prevent malicious actors from taking over your devices.

• FIRST_USER_PASS (Default: unset)

  Password for the first user. If unset, the account is locked.

• DISABLE_FIRST_BOOT_USER_RENAME (Default: 0)

  Disable the renaming of the first user during the first boot. This make it so FIRST_USER_NAME stays activated. FIRST_USER_PASS must be set for this to work. Please be aware of the implied security risk of defining a default username and password for your devices.

• WPA_COUNTRY (Default: unset)

  Sets the default WLAN regulatory domain and unblocks WLAN interfaces. This should be a 2-letter ISO/IEC 3166 country Code, i.e. GB

• ENABLE_SSH (Default: 0)

  Setting to 1 will enable ssh server for remote log in. Note that if you are using a common password such as the defaults there is a high risk of attackers taking over you Raspberry Pi.

• PUBKEY_SSH_FIRST_USER (Default: unset)

Setting this to a value will make that value the contents of the FIRST_USER_NAME's ~/.ssh/authorized_keys. Obviously the value should therefore be a valid authorized_keys file. Note that this does not automatically enable SSH.

• PUBKEY_ONLY_SSH (Default: 0)

• Setting to 1 will disable password authentication for SSH and enable public key authentication. Note that if SSH is not enabled this will take effect when SSH becomes enabled.

• SETFCAP (Default: unset)

  • Setting to 1 will prevent pi-gen from dropping the "capabilities" feature. Generating the root filesystem with capabilities enabled and running it from a filesystem that does not support capabilities (like NFS) can cause issues. Only enable this if you understand what it is.

• STAGE_LIST (Default: stage*)

  If set, then instead of working through the numeric stages in order, this list will be followed. For example setting to "stage0 stage1 mystage stage2" will run the contents of mystage before stage2. Note that quotes are needed around the list. An absolute or relative path can be given for stages outside the pi-gen directory.

• EXPORT_CONFIG_DIR (Default: $BASE_DIR/export-image)

  If set, use this directory path as the location of scripts to run when generating images. An absolute or relative path can be given for a location outside the pi-gen directory.

A simple example for building Raspberry Pi OS:

IMG_NAME='raspios'

The config file can also be specified on the command line as an argument the build.sh or build-docker.sh scripts.

./build.sh -c myconfig

This is parsed after config so can be used to override values set there.