David Heinemeier HanssonandClaude Opus 5
89245f44ec
The install reads ~3GB out of the offline mirror, and pacman consumes it at only ~33MB/s (3.14GB of packages across the 95s the package phase is calibrated at), so on any medium slower than that the install is read-bound. The ISO medium is idle for the minutes the wizard takes, and the target disk written to later is a different device, so reading ahead costs nothing that is otherwise in use. Warms largest-first under a MemAvailable/2 budget. Deliberately no dependency resolution: asking pacman exactly which files the install will read would copy the package-set knowledge in phases_impl.py — the early list, the runtime target, the kernel from the wizard's JSON — into a shell script that would drift silently. The install reads roughly 69% of the mirror, so warming blindly is close enough for a cache hint. The page cache this fills is clean and reclaimable, so the failure mode under memory pressure is wasted bandwidth rather than OOM. The budget stops small machines evicting what was just warmed. The job ends when that budget is spent rather than when the wizard exits, because the partitioning and format window afterwards is also free medium time. OMARCHY_NO_PREFETCH=1 turns it off so a single ISO can measure both arms against the Installing Arch + Omarchy entry in /var/log/omarchy-install-timing.json. Not yet measured on real USB media, and expected to be worth nothing in the VM harness, where the ISO is backed by the host's page cache. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
111 lines
4.4 KiB
Bash
111 lines
4.4 KiB
Bash
#!/usr/bin/env bash
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#
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# Live ISO entry point on tty1: set up the live VT, run the configurator
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# wizard, then hand off to the Python install orchestrator. Mirrors the
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# stream/env contract from the previously-working installer:
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# - stdout teed to /var/log/omarchy-install.log (CSI-stripped) AND to tty
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# - stderr direct to /dev/tty so gum (which draws its TUI on stderr)
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# renders correctly
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# - CLICOLOR_FORCE/FORCE_COLOR so gum emits ANSI even with stdout piped
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# - COLUMNS/LINES so gum picks up real terminal size
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set -euo pipefail
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[[ $(tty) == /dev/tty1 ]] || exit 0
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export OMARCHY_MIRROR="$(cat /root/omarchy_mirror)"
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if [[ -f /root/omarchy_iso_ref ]]; then
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export OMARCHY_ISO_REF="$(cat /root/omarchy_iso_ref)"
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fi
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if [[ -f /usr/share/omarchy-iso/package-targets ]]; then
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# shellcheck disable=SC1091
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source /usr/share/omarchy-iso/package-targets
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export OMARCHY_RUNTIME_PACKAGE OMARCHY_SETTINGS_PACKAGE OMARCHY_NVIM_PACKAGE
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fi
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export OMARCHY_PATH=/usr/share/omarchy
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export OMARCHY_INSTALL=$OMARCHY_PATH/install
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export OMARCHY_INSTALL_LOG_FILE=/var/log/omarchy-install.log
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if [[ -f /usr/share/omarchy-iso/install-debug ]]; then
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export OMARCHY_INSTALL_DEBUG=1
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fi
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# Tokyo Night palette so the live VT matches the installed look.
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set_tokyo_night_colors() {
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echo -en "\e]P01a1b26"; echo -en "\e]P1f7768e"; echo -en "\e]P29ece6a"
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echo -en "\e]P3e0af68"; echo -en "\e]P47aa2f7"; echo -en "\e]P5bb9af7"
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echo -en "\e]P67dcfff"; echo -en "\e]P7a9b1d6"; echo -en "\e]P8414868"
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echo -en "\e]P9f7768e"; echo -en "\e]PA9ece6a"; echo -en "\e]PBe0af68"
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echo -en "\e]PC7aa2f7"; echo -en "\e]PDbb9af7"; echo -en "\e]PE7dcfff"
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echo -en "\e]PFc0caf5"
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echo -en "\033[0m"
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clear
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}
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set_tokyo_night_colors
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mkdir -p /var/log
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touch "$OMARCHY_INSTALL_LOG_FILE"
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export COLUMNS=$(tput cols)
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export LINES=$(tput lines)
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exec > >(tee >(sed -u 's/\x1b\[[0-9;?]*[A-Za-z]//g' >>"$OMARCHY_INSTALL_LOG_FILE") 2>/dev/null) 2>/dev/tty
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export CLICOLOR_FORCE=1
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export FORCE_COLOR=1
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if [[ ${OMARCHY_INSTALL_DEBUG:-} == "1" ]]; then
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echo "=== Omarchy ISO debug build ==="
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[[ -f /usr/share/omarchy-iso/build-info ]] && cat /usr/share/omarchy-iso/build-info
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pacman -Q omarchy-settings omarchy-keyring 2>/dev/null || true
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echo "================================"
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fi
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# Warm the page cache for the bundled packages while the user works through the
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# wizard. The install reads ~3GB out of the offline mirror, and pacman consumes
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# it at only ~33MB/s, so on media slower than that the install is read-bound and
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# every byte cached here is a byte it never waits for. On faster media this costs
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# nothing but otherwise-idle bandwidth: the medium is untouched while the user
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# types, and the target disk it writes to later is a different device.
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#
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# Clean page cache only, so the kernel reclaims it under pressure instead of
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# OOMing, and a budget so small machines never evict what was just warmed.
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# Set OMARCHY_NO_PREFETCH=1 to A/B the same ISO with this disabled.
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warm_offline_mirror() {
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local mirror=/var/cache/omarchy/mirror/offline
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local budget_kb spent_kb=0 size_kb path
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[[ ${OMARCHY_NO_PREFETCH:-} == 1 ]] && return 0
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[[ -d $mirror ]] || return 0
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budget_kb=$(($(awk '/^MemAvailable:/ { print $2 }' /proc/meminfo) / 2))
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((budget_kb > 262144)) || return 0
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# Largest first: the install reads most of the mirror, so when the budget
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# cannot cover all of it this still front-loads the bytes that dominate.
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while read -r size_kb path; do
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((spent_kb + size_kb > budget_kb)) && continue
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cat -- "$path" >/dev/null 2>&1 || true
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spent_kb=$((spent_kb + size_kb))
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done < <(du -k "$mirror"/*.pkg.tar.zst 2>/dev/null | sort -rn)
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}
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warm_offline_mirror &
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warm_pid=$!
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trap 'kill "$warm_pid" 2>/dev/null' EXIT
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cd /root
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./configurator
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# The foreground dashboard is now the sole visible install UI owner. It starts
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# the actual installer as a non-interactive child, logs child output, waits for
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# completion, then renders the final installed-time/reboot prompt itself.
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export OMARCHY_DASHBOARD_TTY="$(tty)"
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rm -f /run/omarchy-install/state.json
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/usr/local/bin/omarchy-install-dashboard \
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"$OMARCHY_INSTALL_LOG_FILE" \
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/run/omarchy-install/state.json \
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-- \
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/usr/local/bin/omarchy-iso-install \
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--config /root/user_configuration.json \
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--creds /root/user_credentials.json \
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--full-name-file /root/user_full_name.txt \
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--email-file /root/user_email_address.txt \
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--encrypt-file /root/user_encrypt_installation.txt
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