guix-installer/build-iso.sh

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#!/bin/sh
# -----------------------------------------------------------------------------
# Utilities
# -----------------------------------------------------------------------------
die() {
# **
# Prints a message to stderr & exits script with non-successful code "1"
# *
printf '%s\n' "$@" >&2
exit 1
}
# -----------------------------------------------------------------------------
# Main
# -----------------------------------------------------------------------------
# Write out the channels file so it can be included
guix time-machine -C './guix/base-channels.scm' -- \
describe -f channels > './guix/channels.scm'
# Build the image
printf 'Attempting to build the image...\n\n'
image=$(guix time-machine -C './guix/channels.scm' --substitute-urls='https://ci.guix.gnu.org https://bordeaux.guix.gnu.org https://substitutes.nonguix.org' -- system image -t iso9660 './guix/installer.scm') \
|| die 'Could not create image.'
release_tag=$(date +"%Y%m%d%H%M")
cp "${image}" "./guix-installer-${release_tag}.iso" ||
die 'An error occurred while copying.'
printf 'Image was succesfully built: %s\n' "${image}"
# cleanup
unset -f die
unset -v image release_tag