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feat: Opt-in BIOS update for the Steam Machine
- Menu item (Fremont only, never preselected) with the current and newest BIOS version. - Two warnings and two confirmations (y/N, then typing UPDATE); checksum-verified download of Valve's fremont-hw-support; installed with fwupd, written at the next restart. - Menu actions: one-off items that are never preselected, re-applied or listed as on/off.
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+121
@@ -0,0 +1,121 @@
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#!/bin/bash
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# "Update BIOS" menu item, only on a Steam Machine and always opt-in: flashes
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# the newest Steam Machine BIOS from Valve's fremont-hw-support package with
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# fwupd. It's an action, not an on/off component: never preselected, never
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# re-applied, and there is nothing to turn off afterwards.
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# Sourced by setup-gamescope-boot.sh; not meant to be run on its own.
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BIOS_REPO_PREFIX=holo
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bios_available() { detect_valve_fremont; }
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bios_status() { return 1; }
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bios_disable() { return 0; }
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bios_current() {
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cat /sys/class/dmi/id/bios_version 2>/dev/null || echo unknown
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}
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bios_lookup_newest() {
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# Sets BIOS_REPO, BIOS_PKG, BIOS_SHA256 and BIOS_NEWEST (e.g. F7F0108)
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# from the newest holo-X.Y repository on Valve's mirror: its .files
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# database names the firmware file, its .db gives the package checksum.
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# Only once per run, and with short timeouts so an offline machine
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# doesn't hold up the menu.
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[[ -n "${BIOS_LOOKED_UP:-}" ]] && return 0
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BIOS_LOOKED_UP=1; BIOS_NEWEST=""
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local tmp desc
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BIOS_REPO="$(curl -fsL --max-time 10 "$VALVE_MIRROR/" | grep -oE "$BIOS_REPO_PREFIX-[0-9]+\.[0-9]+/" | tr -d / | sort -uV | tail -n 1)"
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[[ -n "$BIOS_REPO" ]] || return 1
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tmp="$(mktemp -d)"
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if curl -fsL --max-time 30 "$VALVE_MIRROR/$BIOS_REPO/os/x86_64/$BIOS_REPO.files" -o "$tmp/files" &&
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curl -fsL --max-time 30 "$VALVE_MIRROR/$BIOS_REPO/os/x86_64/$BIOS_REPO.db" -o "$tmp/db"; then
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desc="$(tar -tf "$tmp/files" 2>/dev/null | grep -E '^fremont-hw-support-[0-9][^/]*/files$' | head -n 1)"
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[[ -n "$desc" ]] && BIOS_CAB="$(tar -xOf "$tmp/files" "$desc" | grep -E '^usr/share/fwupd/.*\.cab$' | head -n 1)"
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desc="${desc%/files}/desc"
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BIOS_PKG="$(tar -xOf "$tmp/db" "$desc" 2>/dev/null | awk '/^%FILENAME%$/ { getline; print }')"
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BIOS_SHA256="$(tar -xOf "$tmp/db" "$desc" 2>/dev/null | awk '/^%SHA256SUM%$/ { getline; print }')"
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[[ -n "${BIOS_CAB:-}" && -n "$BIOS_PKG" && -n "$BIOS_SHA256" ]] && BIOS_NEWEST="$(basename "$BIOS_CAB" .cab)"
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fi
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rm -rf "$tmp"
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[[ -n "$BIOS_NEWEST" ]]
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}
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bios_label() {
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# Menu label with the current and the newest version.
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local newest="newest unknown (offline?)"
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bios_lookup_newest && newest="newest $BIOS_NEWEST"
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[[ "$BIOS_NEWEST" == "$(bios_current)" ]] && newest="up to date"
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echo "Update BIOS (at your own risk): now $(bios_current), $newest"
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}
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bios_disclaimer() {
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local r="$c_red$c_bold" n="$c_reset"
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echo
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echo -e "${r} ###################################################################${n}"
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echo -e "${r} ## ##${n}"
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echo -e "${r} ## WARNING: BIOS UPDATE - ENTIRELY AT YOUR OWN RISK ##${n}"
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echo -e "${r} ## ##${n}"
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echo -e "${r} ###################################################################${n}"
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echo -e "${r} ##${n} $1"
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echo -e "${r} ##${n}"
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echo -e "${r} ##${n} - A failed or interrupted BIOS update can leave the machine"
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echo -e "${r} ##${n} unable to start (bricked). This wizard, CachyOS and Valve"
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echo -e "${r} ##${n} take no responsibility for that."
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echo -e "${r} ##${n} - ${c_bold}NEVER turn off the power, unplug the machine or press the${n}"
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echo -e "${r} ##${n} ${c_bold}power button while the update runs${n}, including during the"
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echo -e "${r} ##${n} restart(s) afterwards, when the firmware is actually written."
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echo -e "${r} ##${n} - The screen can stay black for several minutes. Wait."
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echo -e "${r} ##${n} - Use this only on a Valve Steam Machine, on mains power, and"
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echo -e "${r} ##${n} close all other programs first."
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echo -e "${r} ###################################################################${n}"
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echo
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}
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bios_enable() {
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if ! bios_lookup_newest; then
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err "Couldn't find the newest Steam Machine BIOS on Valve's mirror ($VALVE_MIRROR)."
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return 1
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fi
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local current
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current="$(bios_current)"
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if [[ "$current" == "$BIOS_NEWEST" ]]; then
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ok "The BIOS is already the newest version ($current); nothing to do."
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return 0
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fi
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bios_disclaimer "Current BIOS: ${c_bold}$current${c_reset} -> new BIOS: ${c_bold}$BIOS_NEWEST${c_reset} ($BIOS_PKG)"
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ask_yn "Do you understand the risks and want to continue?" n ||
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{ info "BIOS update cancelled; nothing was changed."; return 0; }
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bios_disclaimer "LAST CHANCE: this flashes BIOS $BIOS_NEWEST onto this machine."
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local reply
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read -rp "$(echo -e "${c_red}${c_bold}Type UPDATE (in capitals) to flash the BIOS, anything else cancels:${c_reset} ")" reply
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[[ "$reply" == UPDATE ]] || { info "BIOS update cancelled; nothing was changed."; return 0; }
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pacman -Q fwupd >/dev/null 2>&1 || sudo pacman -S --needed --noconfirm fwupd ||
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{ err "Installing fwupd failed."; return 1; }
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local tmp
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tmp="$(mktemp -d)"
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info "Downloading $BIOS_PKG ($BIOS_REPO)..."
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if ! curl -fL "$VALVE_MIRROR/$BIOS_REPO/os/x86_64/$BIOS_PKG" -o "$tmp/pkg.tar.zst" ||
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! echo "$BIOS_SHA256 $tmp/pkg.tar.zst" | sha256sum -c --quiet - ||
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! tar -I unzstd -xf "$tmp/pkg.tar.zst" -C "$tmp" "$BIOS_CAB"; then
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err "Downloading or verifying $BIOS_PKG failed; the BIOS was not touched."
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rm -rf "$tmp"
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return 1
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fi
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info "Handing BIOS $BIOS_NEWEST to fwupd. Do NOT turn off the power from now on."
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# -y: we already asked twice; --no-reboot-check: the wizard's own
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# restart question comes at the end.
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if ! sudo fwupdmgr install -y --no-reboot-check "$tmp/$BIOS_CAB"; then
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err "fwupd could not install the BIOS update (see above); the BIOS was not changed."
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rm -rf "$tmp"
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return 1
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fi
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rm -rf "$tmp"
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BIOS_NEEDS_RESTART=1
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ok "BIOS $BIOS_NEWEST is staged. It is written during the next restart:"
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warn "keep the power on and don't touch the machine until it has fully started again."
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}
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+23
-8
@@ -5,7 +5,10 @@
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# Menu order. Components are turned on in this order and off in reverse;
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# gaming must come first (single user builds on it).
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COMPONENTS=(gaming theme glyphs single machine)
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COMPONENTS=(gaming theme glyphs single machine bios)
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# One-off actions rather than on/off components: never preselected, never
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# re-applied, not listed as on or off.
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ACTIONS=(bios)
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declare -A LABEL=(
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[gaming]="SteamOS conversion: boot into gaming mode, Steam on the desktop"
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@@ -13,13 +16,19 @@ declare -A LABEL=(
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[glyphs]="Install Steam Deck/Machine icons: Deck button icons in gaming mode"
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[single]="Single user mode: no password, lock screen or log out (SDDM)"
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[machine]="Steam Machine support: LED bar driver, hardware settings in Steam"
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[bios]="Update BIOS"
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)
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declare -A CURRENT WANTED
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component_available() {
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[[ "$1" != machine ]] || machine_available
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case "$1" in
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machine) machine_available ;;
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bios) bios_available ;;
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esac
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}
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is_action() { [[ " ${ACTIONS[*]} " == *" $1 "* ]]; }
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detect_components() {
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local c any=false
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for c in "${COMPONENTS[@]}"; do
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@@ -27,10 +36,12 @@ detect_components() {
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if "${c}_status"; then CURRENT[$c]=1; any=true; else CURRENT[$c]=0; fi
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WANTED[$c]=${CURRENT[$c]}
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done
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# First run: preselect the full SteamOS experience.
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# Shows the current and newest BIOS version.
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bios_available && { bios_lookup_newest; LABEL[bios]="$(bios_label)"; }
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# First run: preselect the full SteamOS experience (never an action).
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if [[ "$any" == false ]]; then
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for c in "${COMPONENTS[@]}"; do
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component_available "$c" && WANTED[$c]=1
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component_available "$c" && ! is_action "$c" && WANTED[$c]=1
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done
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fi
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}
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@@ -52,6 +63,7 @@ show_menu() {
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component_available "$c" || continue
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i=$((i + 1)); MENU_ITEMS[$i]=$c
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now="off"; [[ "${CURRENT[$c]}" == 1 ]] && now="${c_green}on${c_reset} "
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is_action "$c" && now="-"
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want="[ ]"; [[ "${WANTED[$c]}" == 1 ]] && want="[x]"
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printf " %-3s %-6b %-6s %s\n" "$i" "$now " "$want" "${LABEL[$c]}"
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done
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@@ -84,13 +96,14 @@ draw_menu_tui() {
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component_available "$c" || continue
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MENU_ITEMS[$i]=$c
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box="[ ]"; [[ "${WANTED[$c]}" == 1 ]] && box="[${c_green}x${c_reset}]"
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state="off"; [[ "${CURRENT[$c]}" == 1 ]] && state="${c_green}on${c_reset}"
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state=" (now: off)"; [[ "${CURRENT[$c]}" == 1 ]] && state=" (now: ${c_green}on${c_reset})"
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is_action "$c" && state=" (opt-in, runs once)"
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line="$box ${LABEL[$c]}"
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if (( i == cursor )); then
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# The green x's reset would end the bold too: re-enable it after.
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echo -e " ${c_cyan}>${c_reset} ${c_bold}${line//"$c_reset"/"$c_reset$c_bold"}${c_reset} (now: ${state})"
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echo -e " ${c_cyan}>${c_reset} ${c_bold}${line//"$c_reset"/"$c_reset$c_bold"}${c_reset}${state}"
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else
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echo -e " ${line} (now: ${state})"
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echo -e " ${line}${state}"
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fi
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i=$((i + 1))
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done
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@@ -160,6 +173,7 @@ plan_changes() {
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for c in "${COMPONENTS[@]}"; do
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component_available "$c" || continue
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[[ "${WANTED[$c]}" == 1 ]] || continue
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if is_action "$c"; then TO_ENABLE+=("$c"); continue; fi
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if [[ "${CURRENT[$c]}" == 0 || "$REAPPLY" == true ]] ||
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[[ "$c" == gaming && "${CURRENT[single]}" != "${WANTED[single]}" ]]; then
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TO_ENABLE+=("$c")
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@@ -177,7 +191,8 @@ apply_changes() {
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"${c}_disable" || failed+=("$c")
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done
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for c in "${TO_ENABLE[@]}"; do
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echo; echo -e "${c_bold}Turning on: ${LABEL[$c]}${c_reset}"
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if is_action "$c"; then echo; echo -e "${c_bold}Running: ${LABEL[$c]}${c_reset}"
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else echo; echo -e "${c_bold}Turning on: ${LABEL[$c]}${c_reset}"; fi
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"${c}_enable" || failed+=("$c")
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done
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FAILED=("${failed[@]}")
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