David Heinemeier HanssonandClaude Opus 5
a8c3a671ea
Squashfs decompresses on the page-fault path through a single stream (CONFIG_SQUASHFS_DECOMP_SINGLE), where xz manages roughly a tenth of zstd's throughput, and the live root is read cold on every boot: kernel, plymouth, systemd, python, archinstall, gum. The offline mirror is already stored uncompressed, so this only covers the part that still gets decompressed. Costs well under a percent of ISO size. Dropping the x86 BCJ filter also removes one of the blockers listed in plans/aarch64-support.md. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
45 lines
1.9 KiB
Bash
45 lines
1.9 KiB
Bash
#!/usr/bin/env bash
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# shellcheck disable=SC2034
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iso_name="omarchy"
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iso_label="OMARCHY_$(date --date="@${SOURCE_DATE_EPOCH:-$(date +%s)}" +%Y%m)"
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iso_publisher="Omarchy <https://omarchy.org>"
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iso_application="Omarchy Installer"
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iso_version="$(date --date="@${SOURCE_DATE_EPOCH:-$(date +%s)}" +%Y.%m.%d)"
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install_dir="arch"
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buildmodes=('iso')
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bootmodes=('bios.syslinux' 'uefi.grub')
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arch="x86_64"
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pacman_conf="pacman-offline.conf"
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airootfs_image_type="squashfs"
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# Package archives in the offline mirror are already zstd-compressed. Storing
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# them in an outer stream saves little space but makes pacman decompress the
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# outer layer while hashing and extracting every package during installation.
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#
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# Everything else in the live root is zstd rather than xz. Squashfs decompresses
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# on the page-fault path through a single stream (CONFIG_SQUASHFS_DECOMP_SINGLE),
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# where xz manages ~100MB/s against zstd's ~900MB/s, and the live root is read
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# cold on every boot: kernel, plymouth, systemd, python, archinstall, gum. The
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# whole ISO grows well under a percent for it, and dropping the x86 BCJ filter
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# also removes one of the blockers listed in plans/aarch64-support.md.
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airootfs_image_tool_options=(
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'-comp' 'zstd'
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'-Xcompression-level' '19'
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'-b' '1M'
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'-action' 'uncompressed@subpathname(var/cache/omarchy/mirror/offline)'
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)
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bootstrap_tarball_compression=('zstd' '-c' '-T0' '--auto-threads=logical' '--long' '-19')
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file_permissions=(
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["/etc/shadow"]="0:0:400"
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["/root"]="0:0:750"
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["/root/.automated_script.sh"]="0:0:755"
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["/root/.gnupg"]="0:0:700"
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["/root/configurator"]="0:0:755"
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["/usr/local/bin/choose-mirror"]="0:0:755"
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["/usr/local/bin/omarchy-iso-cleanup-disk"]="0:0:755"
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["/usr/local/bin/omarchy-install-dashboard"]="0:0:755"
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["/usr/local/bin/omarchy-iso-install"]="0:0:755"
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["/usr/local/bin/omarchy-upload-log"]="0:0:755"
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["/var/cache/omarchy/mirror/offline/"]="0:0:775"
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)
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