rob thijssen
280874f564
Assembles a ready-to-write disk image via Gitea Actions. Mainline has carried sdm850-lenovo-yoga-c630.dts since 5.5 and Fedora ships it in kernel-core, so unlike aarch64-laptops/build there is no kernel or GRUB to compile — what is left is producing an image that boots on firmware which hands Linux no device tree. The build runs in an aarch64 container under qemu-user and builds filesystems from directory trees with mke2fs -d and mcopy rather than mounting loop devices, so it works on runners that will not hand out /dev/loop-control. A kernel-install hook writes the devicetree line into each BLS entry; without it the first `dnf update kernel` would produce an unbootable system. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XWRjNJMistCy6ngXH5aJLS
48 lines
1.6 KiB
Bash
Executable File
48 lines
1.6 KiB
Bash
Executable File
#!/usr/bin/bash
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#
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# Teach kernel-install about the C630's device tree.
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#
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# The C630's UEFI hands Linux no device tree, so GRUB has to load one. Fedora's
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# BLS snippets have a `devicetree` key for exactly this, but nothing in the
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# stock toolchain populates it — which means a plain `dnf update kernel` would
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# otherwise produce an unbootable entry. This hook runs after 20-grub.install
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# and patches the entry it just wrote.
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set -eu
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COMMAND="${1:?}"
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KERNEL_VERSION="${2:?}"
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DTB_REL="@DEVICE_DTB@"
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BOOT_ROOT="${KERNEL_INSTALL_BOOT_ROOT:-/boot}"
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ENTRIES_DIR="${BOOT_ROOT}/loader/entries"
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case "$COMMAND" in
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add)
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dtb_path="/dtb-${KERNEL_VERSION}/${DTB_REL}"
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if [ ! -e "${BOOT_ROOT}${dtb_path}" ]; then
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echo "95-c630-devicetree: ${BOOT_ROOT}${dtb_path} is missing;" \
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"leaving boot entries alone rather than writing a bad one" >&2
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exit 0
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fi
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shopt -s nullglob
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for entry in "${ENTRIES_DIR}"/*-"${KERNEL_VERSION}".conf; do
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# Drop any stale devicetree line, then append the current one. Doing it
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# in that order makes the hook idempotent across re-installs.
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tmp="${entry}.c630.$$"
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grep -v '^devicetree[[:space:]]' "$entry" > "$tmp"
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printf 'devicetree %s\n' "$dtb_path" >> "$tmp"
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mv -f "$tmp" "$entry"
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echo "95-c630-devicetree: set devicetree ${dtb_path} in ${entry}"
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done
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;;
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remove)
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# The build writes its own bootstrap entry under a fixed name, which
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# kernel-install would not otherwise clean up when the kernel goes away.
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rm -f "${ENTRIES_DIR}/c630-${KERNEL_VERSION}.conf"
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;;
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esac
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exit 0
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