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+# SPDX-License-Identifier: GPL-2.0-only
+# Copyright (C) 2023 Canonical Ltd
+#
+# Build for arm64:
+#
+# $ snapcraft --use-lxd --build-for=arm64
+#
+# Build for armhf:
+#
+# $ snapcraft --use-lxd --build-for=armhf
+
+name: pi-kernel
+summary: The Canonical Raspberry Pi kernel
+description: The Canonical Raspberry Pi kernel
+type: kernel
+confinement: strict
+build-base: core22
+# Take the version from debian/changelog
+adopt-info: kernel
+
+architectures:
+ - build-on: [amd64, arm64]
+ build-for: arm64
+ - build-on: [amd64, armhf]
+ build-for: armhf
+
+package-repositories:
+ - type: apt
+ architectures: [arm64, armhf]
+ components: [main]
+ suites: [jammy]
+ key-id: 78E1918602959B9C59103100F1831DDAFC42E99D
+ url: https://ppa.launchpadcontent.net/snappy-dev/image/ubuntu
+ - type: apt
+ architectures: [arm64, armhf]
+ components: [main, restricted]
+ suites: [jammy, jammy-updates]
+ key-id: F6ECB3762474EDA9D21B7022871920D1991BC93C
+ url: http://ports.ubuntu.com/ubuntu-ports
+
+parts:
+ kernel:
+ build-packages:
+ - bc
+ - bison
+ - debhelper
+ - fakeroot
+ - flex
+ - gawk
+ - kmod
+ - libssl-dev
+ - pahole
+ - rsync
+ - on amd64 to arm64:
+ - gcc-aarch64-linux-gnu
+ - libc6-dev-arm64-cross
+ - on amd64 to armhf:
+ - gcc-arm-linux-gnueabihf
+ - libc6-dev-armhf-cross
+ plugin: nil
+ source-type: local
+ source: .
+ override-build: |
+ FLAVOUR=raspi
+ deb_arch=${SNAPCRAFT_TARGET_ARCH}
+
+ # Include 'DEBIAN' definition
+ . debian/debian.env
+ deb_ver=$(dpkg-parsechangelog -l "${DEBIAN}/changelog" -S version)
+ kernelrelease=$(echo "${deb_ver}" | cut -d. -f1-3)-${FLAVOUR}
+ craftctl set "version=local-${deb_ver}"
+
+ dpkg-architecture -a "${deb_arch}" -c fakeroot debian/rules clean
+ dpkg-architecture -a "${deb_arch}" -c debian/rules "build-${FLAVOUR}"
+ dpkg-architecture -a "${deb_arch}" -c fakeroot debian/rules "binary-${FLAVOUR}"
+
+ for pkg in linux-image linux-modules linux-buildinfo; do
+ dpkg-deb -x "../${pkg}-${kernelrelease}_${deb_ver}_${deb_arch}.deb" tmpdir
+ done
+
+ depmod -b tmpdir "${kernelrelease}"
+ mv tmpdir/boot/vmlinuz-* "${SNAPCRAFT_PART_INSTALL}/kernel.img"
+ mv tmpdir/boot/config-* tmpdir/boot/System.map-* "${SNAPCRAFT_PART_INSTALL}/"
+ mv tmpdir/lib/modules "${SNAPCRAFT_PART_INSTALL}"
+ mv "tmpdir/lib/firmware/${kernelrelease}/device-tree" "${SNAPCRAFT_PART_INSTALL}/dtbs"
+
+ firmware:
+ build-packages:
+ - bluez-firmware
+ - linux-firmware
+ plugin: nil
+ override-build: |
+ mkdir -p tmpdir/lib
+ cp -r /lib/firmware tmpdir/lib
+
+ # linux-firmware and linux-firmware-raspi provides the same firmware
+ # files with different contents. Copy linux-firmware-raspi last.
+ apt-get download "linux-firmware-raspi:${SNAPCRAFT_TARGET_ARCH}"
+ dpkg-deb -x linux-firmware-raspi_*.deb tmpdir
+ mv tmpdir/lib/firmware "${SNAPCRAFT_PART_INSTALL}"
+
+ # 'kernel-snap-uc22' runs 'trim-firmware' as the last step. Skip it here
+ # to simplify the build step. The resulting kernel snap will contain more
+ # firmware files than needed for raspberry pi, but it is not a big deal.
+
+ initrd:
+ after:
+ - firmware
+ - kernel
+ build-packages:
+ - dracut
+ - zstd
+ plugin: nil
+ override-build: |
+ apt-get download "ubuntu-core-initramfs:${SNAPCRAFT_TARGET_ARCH}"
+ dpkg-deb -x ubuntu-core-initramfs_*.deb tmpdir
+ apt-get download "snapd:${SNAPCRAFT_TARGET_ARCH}"
+ dpkg-deb -x snapd_*.deb tmpdir
+
+ mkdir tmpdir/lib/modules
+
+ kernelrelease=$(ls "${SNAPCRAFT_STAGE}/modules")
+
+ ln -s "${SNAPCRAFT_STAGE}/modules/${kernelrelease}" "tmpdir/lib/modules/${kernelrelease}"
+ ln -s "${SNAPCRAFT_STAGE}/firmware" tmpdir/lib/firmware
+
+ # Run usr/bin/ubuntu-core-initramfs inside 'tmpdir'.
+ # Otherwise, tmpdir would be included in initrd.img. Odd...
+ ( cd tmpdir; usr/bin/ubuntu-core-initramfs create-initrd \
+ --root . --output initrd.img --kernelver "${kernelrelease}" )
+ cp "tmpdir/initrd.img-${kernelrelease}" "${SNAPCRAFT_PART_INSTALL}"/initrd.img
+
+ finalize:
+ after:
+ - initrd
+ plugin: nil
+ override-build: |
+ # Mimic what 'kernel-snaps-uc22' does
+ cp /usr/share/common-licenses/GPL-2 "${SNAPCRAFT_PART_INSTALL}"
+ mkdir "${SNAPCRAFT_PART_INSTALL}/lib"
+ ln -s ../firmware "${SNAPCRAFT_PART_INSTALL}/lib"
+ ln -s ../modules "${SNAPCRAFT_PART_INSTALL}/lib"
+
+ mkdir -p "${SNAPCRAFT_PART_INSTALL}/meta"
+ {
+ echo "assets:"
+ echo " dtbs:"
+ echo " update: true"
+ echo " content:"
+ echo " - dtbs/"
+ } > "${SNAPCRAFT_PART_INSTALL}/meta/kernel.yaml"
Add snapcraft.yaml to support the local building for the pi-kernel snap. This supports cross-building, making it possible to build the snap on your x86 machine, and useful for development purposes. Build for arm64: $ snapcraft --use-lxd --build-for=arm64 Build for armhf: $ snapcraft --use-lxd --build-for=armhf Both arm64 and armhf snaps were tested on Raspberry Pi 4. BugLink: https://bugs.launchpad.net/bugs/2051468 Signed-off-by: Masahiro Yamada <masahiro.yamada@canonical.com> Commit-notes: Changes since the previos posts - Add BugLink - Fix BugLink style - Add 'PATCH' in the subject prefix Changes in v2: - Remove unneeded CONFIG_MODULE_SIG_FORCE orverride - Split the last treak to 'finalize' END Series-prefix: j/linux-raspi v2 RESEND4 Cover-letter: Make snapcraft.yaml work linux-raspi added snapcraft.yaml more than a decade ago, which is not functional at all. Remove the old one, and re-implement working snapcraft.yaml. BugLink: https://bugs.launchpad.net/bugs/2051468 END --- snapcraft.yaml | 151 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 151 insertions(+) create mode 100644 snapcraft.yaml