vasilito
7c031f95e4
Add blake3 checksum for grub-2.12.tar.xz for recipe integrity verification. Remove the chain module from grub-mkimage — the chainloader command is built-in in GRUB 2.12, no separate module needed. Image shrinks from 540 KiB to 512 KiB. Update module table and size estimate in GRUB integration plan.
137 lines
4.1 KiB
TOML
137 lines
4.1 KiB
TOML
# Red Bear OS — GRUB Boot Manager
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#
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# Builds GRUB for the HOST machine (not the Redox target).
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# GRUB is a build tool that produces standalone EFI binaries.
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# The resulting grub.efi chainloads the Redox bootloader.
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#
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# Output: /usr/lib/boot/grub.efi, /usr/lib/boot/grub.cfg
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#
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# Build: make r.grub
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# Install into image: ./local/scripts/install-grub.sh build/x86_64/harddrive.img
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#
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# Requires: gcc, make, bison, flex, autoconf, automake on host
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[source]
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tar = "https://ftp.gnu.org/gnu/grub/grub-2.12.tar.xz"
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blake3 = "13c48453f9becf4a6e49618749dc7cb83a2c4a0d7600eeeadc6c7c2772c0b877"
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[build]
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template = "custom"
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script = """
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# GRUB must be built for the HOST machine, not the Redox target.
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# It is a build tool that produces EFI binaries for bare-metal boot.
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# Override cookbook cross-compilation environment.
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# Force HOST compiler — cookbook sets CC to Redox cross-compiler.
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# GRUB is a host build tool, not a Redox binary.
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unset CC CXX CPP LD AR NM RANLIB OBJCOPY STRIP PKG_CONFIG
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unset CFLAGS CXXFLAGS CPPFLAGS LDFLAGS
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# Verify host tools are available before starting the build.
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for tool in gcc make bison flex; do
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if ! command -v "${tool}" &>/dev/null; then
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echo "ERROR: Required host tool '${tool}' not found" >&2
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exit 1
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fi
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done
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# Out-of-tree build (GRUB requires this for some configurations)
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mkdir -p "${COOKBOOK_BUILD}/grub-build" || exit 1
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cd "${COOKBOOK_BUILD}/grub-build" || exit 1
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# GRUB release tarballs miss extra_deps.lst (normally generated by autogen.sh)
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touch "${COOKBOOK_SOURCE}/grub-core/extra_deps.lst" || exit 1
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# Configure for host, targeting x86_64 EFI platform output.
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# --target=x86_64 means "produce boot images for x86_64"
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# --with-platform=efi means "EFI platform output"
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# We intentionally do NOT set --host (it should be the build machine).
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echo "Configuring GRUB for x86_64 EFI..."
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"${COOKBOOK_SOURCE}/configure" \
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--target=x86_64 \
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--with-platform=efi \
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--disable-werror \
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--disable-nls \
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--disable-grub-mkfont \
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--disable-grub-themes \
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--disable-grub-mount \
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--disable-device-mapper \
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--disable-libzfs \
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--prefix="${COOKBOOK_STAGE}/usr" || exit 1
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echo "Building GRUB..."
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make -j "${COOKBOOK_MAKE_JOBS}" || exit 1
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# Create output directory
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mkdir -p "${COOKBOOK_STAGE}/usr/lib/boot"
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# Locate GRUB modules directory.
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# In an out-of-tree build, modules are in grub-core/ under the build dir.
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MOD_DIR=""
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for d in grub-core .; do
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if [ -f "${d}/part_gpt.mod" ]; then
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MOD_DIR="${d}"
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break
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fi
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done
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if [ -z "${MOD_DIR}" ]; then
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echo "ERROR: Cannot find GRUB modules directory" >&2
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echo "Looked in: grub-core/ ." >&2
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find . -name "part_gpt.mod" 2>/dev/null || true
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exit 1
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fi
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echo "Found GRUB modules in: ${MOD_DIR}"
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# Build standalone EFI image with curated module set.
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# -O x86_64-efi: output format
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# -d MOD_DIR: module search directory
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# -p /EFI/BOOT: prefix for GRUB config search path
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# The resulting image is self-contained (no external module files needed).
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echo "Creating standalone GRUB EFI image..."
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./grub-mkimage \
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-O x86_64-efi \
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-d "${MOD_DIR}" \
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-o "${COOKBOOK_STAGE}/usr/lib/boot/grub.efi" \
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-p /EFI/BOOT \
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part_gpt \
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part_msdos \
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fat \
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ext2 \
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normal \
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configfile \
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search \
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search_fs_uuid \
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search_label \
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echo \
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test \
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ls \
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cat \
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halt \
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reboot || exit 1
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# Verify output
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if [ ! -f "${COOKBOOK_STAGE}/usr/lib/boot/grub.efi" ]; then
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echo "ERROR: grub.efi was not created" >&2
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exit 1
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fi
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GRUB_SIZE=$(stat -c%s "${COOKBOOK_STAGE}/usr/lib/boot/grub.efi" 2>/dev/null || echo "unknown")
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echo "GRUB EFI image size: ${GRUB_SIZE} bytes"
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# Copy default GRUB configuration from recipe directory.
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# grub.cfg lives alongside recipe.toml, not in the extracted source tarball.
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if [ -f "${COOKBOOK_RECIPE}/grub.cfg" ]; then
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cp "${COOKBOOK_RECIPE}/grub.cfg" "${COOKBOOK_STAGE}/usr/lib/boot/grub.cfg"
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echo "Installed grub.cfg"
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else
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echo "ERROR: grub.cfg not found in ${COOKBOOK_RECIPE}" >&2
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echo "The grub.cfg file must exist alongside recipe.toml." >&2
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exit 1
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fi
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echo "GRUB recipe complete."
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echo "Install with: ./local/scripts/install-grub.sh build/x86_64/harddrive.img"
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"""
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