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dist-kernel-utils.eclass: Introduce eclass for helper functions
Move some of the utility functions from kernel-install.eclass into dist-kernel-utils.eclass, in order to permit using them without having all kernel-install phases exported. This will be used in order to support rebuilding initramfs in sys-fs/zfs-kmod. Since the eclasses are used only by dist-kernel project eclasses and ebuilds, update the function prefix while moving them. Signed-off-by: Michał Górny <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| # Copyright 2020-2021 Gentoo Authors | ||
| # Distributed under the terms of the GNU General Public License v2 | ||
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| # @ECLASS: dist-kernel-utils.eclass | ||
| # @MAINTAINER: | ||
| # Distribution Kernel Project <[email protected]> | ||
| # @AUTHOR: | ||
| # Michał Górny <[email protected]> | ||
| # @SUPPORTED_EAPIS: 7 | ||
| # @BLURB: Utility functions related to Distribution Kernels | ||
| # @DESCRIPTION: | ||
| # This eclass provides various utility functions related to Distribution | ||
| # Kernels. | ||
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||
| if [[ ! ${_DIST_KERNEL_UTILS} ]]; then | ||
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| case "${EAPI:-0}" in | ||
| 0|1|2|3|4|5|6) | ||
| die "Unsupported EAPI=${EAPI:-0} (too old) for ${ECLASS}" | ||
| ;; | ||
| 7) | ||
| ;; | ||
| *) | ||
| die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}" | ||
| ;; | ||
| esac | ||
|
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||
| # @FUNCTION: dist-kernel_build_initramfs | ||
| # @USAGE: <output> <version> | ||
| # @DESCRIPTION: | ||
| # Build an initramfs for the kernel. <output> specifies the absolute | ||
| # path where initramfs will be created, while <version> specifies | ||
| # the kernel version, used to find modules. | ||
| # | ||
| # Note: while this function uses dracut at the moment, other initramfs | ||
| # variants may be supported in the future. | ||
| dist-kernel_build_initramfs() { | ||
| debug-print-function ${FUNCNAME} "${@}" | ||
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|
||
| [[ ${#} -eq 2 ]] || die "${FUNCNAME}: invalid arguments" | ||
| local output=${1} | ||
| local version=${2} | ||
|
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| ebegin "Building initramfs via dracut" | ||
| dracut --force "${output}" "${version}" | ||
| eend ${?} || die "Building initramfs failed" | ||
| } | ||
|
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||
| # @FUNCTION: dist-kernel_get_image_path | ||
| # @DESCRIPTION: | ||
| # Get relative kernel image path specific to the current ${ARCH}. | ||
| dist-kernel_get_image_path() { | ||
| case ${ARCH} in | ||
| amd64|x86) | ||
| echo arch/x86/boot/bzImage | ||
| ;; | ||
| arm64) | ||
| echo arch/arm64/boot/Image.gz | ||
| ;; | ||
| arm) | ||
| echo arch/arm/boot/zImage | ||
| ;; | ||
| ppc64) | ||
| # ./ is required because of ${image_path%/*} | ||
| # substitutions in the code | ||
| echo ./vmlinux | ||
| ;; | ||
| *) | ||
| die "${FUNCNAME}: unsupported ARCH=${ARCH}" | ||
| ;; | ||
| esac | ||
| } | ||
|
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||
| # @FUNCTION: dist-kernel_install_kernel | ||
| # @USAGE: <version> <image> <system.map> | ||
| # @DESCRIPTION: | ||
| # Install kernel using installkernel tool. <version> specifies | ||
| # the kernel version, <image> full path to the image, <system.map> | ||
| # full path to System.map. | ||
| dist-kernel_install_kernel() { | ||
| debug-print-function ${FUNCNAME} "${@}" | ||
|
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| [[ ${#} -eq 3 ]] || die "${FUNCNAME}: invalid arguments" | ||
| local version=${1} | ||
| local image=${2} | ||
| local map=${3} | ||
|
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| ebegin "Installing the kernel via installkernel" | ||
| # note: .config is taken relatively to System.map; | ||
| # initrd relatively to bzImage | ||
| installkernel "${version}" "${image}" "${map}" | ||
| eend ${?} || die "Installing the kernel failed" | ||
| } | ||
|
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| _DIST_KERNEL_UTILS=1 | ||
| fi |
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