mirror of
https://seed.radicle.dev/rad:z4V1sjrXqjvFdnCUbxPFqd5p4DtH5.git
synced 2026-10-18 19:30:27 +08:00
Rūdolfs Ošiņš
983fff9006
In preparation for merging radicle-desktop into radicle-gui. It's a pure rename, so git can follow every file across the move.
93 lines
4.5 KiB
Bash
Executable File
93 lines
4.5 KiB
Bash
Executable File
#!/bin/bash
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set -euo pipefail
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# The build container (Dockerfile.ubuntu) runs as native ARM64, but Tauri's
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# AppImage bundler downloads and runs linuxdeploy-x86_64.AppImage — an x86_64
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# binary that bundles the app's shared library dependencies (GTK, WebKit, …)
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# into the AppDir so the AppImage is self-contained on any x86_64 Linux system.
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# Without intervention the ARM64 kernel cannot execute it and returns "Exec
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# format error". binfmt_misc is a Linux kernel feature that maps file magic
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# bytes to an interpreter; by registering a handler here, the kernel
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# automatically prepends QEMU to any x86_64 ELF execution, making x86_64
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# binaries work transparently inside the ARM64 container without any changes to
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# the code that invokes them.
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#
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# Register an x86_64 binfmt_misc handler so the ARM64 kernel transparently
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# routes x86_64 ELF executables through QEMU. This is needed because Tauri's
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# AppImage bundler downloads and runs linuxdeploy-x86_64.AppImage.
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#
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# binfmt_misc registration format:
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# :name:type:offset:magic:mask:interpreter:flags
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#
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# The magic matches an x86_64 ELF executable header:
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# \x7fELF — ELF magic
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# \x02 — 64-bit (EI_CLASS)
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# \x01 — little-endian (EI_DATA)
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# \x01 — version
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# \x00... — OS/ABI + padding (bytes 7-15)
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# \x02\x00 — ET_EXEC (executable)
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# \x3e\x00 — x86-64 machine type
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#
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# The mask has \x00 for bytes 7-15 (the padding area). A zero mask bit means
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# "don't check this byte". This is necessary because AppImages embed the
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# two-byte marker 'AI' in bytes 8-9 of the ELF padding. The standard x86_64
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# mask checks those bytes exactly (\xff), so it rejects AppImages. With the
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# permissive mask both plain ELFs and AppImages are intercepted.
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#
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# echo (not printf): the \x.. sequences must reach the kernel binfmt_misc
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# parser as literal text (e.g. the four characters \, x, 7, f), which the
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# kernel then interprets as byte values. printf would expand them to raw bytes
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# first, the parser would misread the entry, and the broken handler would
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# intercept ARM64 binaries and route them through QEMU, breaking the container.
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mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc 2>/dev/null || true
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echo ':qemu-x86_64-appimage:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x3e\x00:\xff\xff\xff\xff\xff\xfe\xfe\x00\x00\x00\x00\x00\x00\x00\x00\x00\xfe\xff\xff\xff:/usr/bin/qemu-x86_64-static:' \
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> /proc/sys/fs/binfmt_misc/register 2>/dev/null || true
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export APPIMAGE_EXTRACT_AND_RUN=1
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# linuxdeploy-plugin-gtk.sh calls pkg-config to find GTK 3; on an ARM64 host
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# with amd64 multiarch the default search path misses the amd64 .pc files.
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export PKG_CONFIG_PATH=/usr/lib/x86_64-linux-gnu/pkgconfig:/usr/share/pkgconfig
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# Ubuntu 24.04 installs gtk-query-immodules-3.0 under the t64 directory.
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# The plugin needs it in PATH; binfmt-misc handles it as x86_64 via QEMU.
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export PATH=/usr/lib/x86_64-linux-gnu/libgtk-3-0t64:$PATH
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npm exec -- tauri build \
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--config '{"build":{"beforeBuildCommand":""}}' \
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--target x86_64-unknown-linux-gnu \
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--bundles appimage
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appimage=(target/x86_64-unknown-linux-gnu/release/bundle/appimage/*.AppImage)
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src="${appimage[0]}"
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# A type-2 AppImage is an ELF runtime followed by a squashfs image. Reuse the
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# runtime (bytes before --appimage-offset) and rebuild only the squashfs.
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offset=$("$src" --appimage-offset)
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head -c "$offset" "$src" > AppImage.runtime
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rm -rf squashfs-root
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# -no-xattrs: the build container's filesystem can't restore them.
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unsquashfs -no-xattrs -o "$offset" -d squashfs-root "$src" >/dev/null
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# linuxdeploy bundles libgobject/libgio but not libglib/libgmodule. On hosts
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# with a newer glib (e.g. Fedora) the mismatched bundled libs crash GTK at
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# startup. Drop them so the whole glib stack resolves from the host.
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rm -f squashfs-root/usr/lib/libgobject-2.0.so* \
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squashfs-root/usr/lib/libgio-2.0.so*
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# Fail the build here, not at a user's launch, if the bundle is wrong.
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if [ ! -f squashfs-root/usr/lib/libjpeg.so.8 ]; then
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echo "error: libjpeg.so.8 is not bundled in the AppImage" >&2
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exit 1
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fi
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for lib in libgobject-2.0.so libgio-2.0.so; do
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if compgen -G "squashfs-root/usr/lib/$lib*" >/dev/null; then
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echo "error: $lib is still bundled; it must resolve from the host" >&2
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exit 1
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fi
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done
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# Reassemble: runtime + new squashfs, matching the runtime's zstd/128K.
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mksquashfs squashfs-root AppImage.squashfs \
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-comp zstd -b 131072 -root-owned -noappend -no-progress -no-xattrs
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cat AppImage.runtime AppImage.squashfs > "$src"
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chmod +x "$src"
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rm -rf squashfs-root AppImage.runtime AppImage.squashfs
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cp "$src" /output/
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