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build.sh
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build.sh
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#!/usr/bin/env bash
# This script executes the modules in order.
# If you have some custom commands you need to run, you should not put them here.
# Instead, you should probably include them as custom scripts.
# Editing this file directly is an unsupported configuration.
# Tell build process to exit if there are any errors.
set -oue pipefail
export CONFIG_DIRECTORY="/tmp/config"
RECIPE_FILE="$CONFIG_DIRECTORY/$RECIPE"
export MODULE_DIRECTORY="/tmp/modules"
# https://mikefarah.gitbook.io/yq/usage/tips-and-tricks#yq-in-a-bash-loop
get_yaml_array() {
# creates array $1 with content at key $2 from $3
readarray "$1" < <(echo "$3" | yq -I=0 "$2")
}
export -f get_yaml_array # this makes the function available to all modules
run_module() {
MODULE="$1"
TYPE=$(echo "$MODULE" | yq '.type')
if [[ "$TYPE" != "null" ]]; then
cd "$CONFIG_DIRECTORY"
# If type is found, that means that the module config
# has been declared inline, and thus is safe to pass to the module
echo "=== Launching module of type: $TYPE ==="
bash "$MODULE_DIRECTORY/$TYPE/$TYPE.sh" "$MODULE"
else
# If the type is not found, that means that the module config
# is in a separate file, and has to be read from it
FILE=$(echo "$MODULE" | yq '.from-file')
run_modules "$CONFIG_DIRECTORY/$FILE"
fi
echo "======"
}
run_modules() {
MODULES_FILE="$1"
readarray MODULES < <(yq -o=j -I=0 '.modules[]' "$MODULES_FILE" )
if [[ ${#MODULES[@]} -gt 0 ]]; then
for MODULE in "${MODULES[@]}"; do
run_module "$MODULE"
done
else
MODULE=$(yq -o=j -I=0 '.' "$MODULES_FILE")
run_module "$MODULE"
fi
}
# Declare dynamically generated variables as exported
declare -x IMAGE_NAME BASE_IMAGE OS_VERSION
# Read configuration variables.
BASE_IMAGE="$(yq '.base-image' "$RECIPE_FILE")"
IMAGE_NAME="$(yq '.name' "$RECIPE_FILE")"
# Automatically determine which Fedora version we're building.
OS_VERSION="$(grep -Po '(?<=VERSION_ID=)\d+' /usr/lib/os-release)"
# Welcome.
echo "Building $IMAGE_NAME from $BASE_IMAGE:$OS_VERSION."
# Remove old image-info.json from main image
# (this file is added back by signing.sh, but shouldn't exist
# with wrong details in an unsigned image)
IMAGE_INFO="/usr/share/ublue-os/image-info.json"
if [ -f "$IMAGE_INFO" ]; then
rm -v "$IMAGE_INFO"
fi
run_modules "$RECIPE_FILE"