194 lines
7.3 KiB
Nix
194 lines
7.3 KiB
Nix
{
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cfg,
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nixos-rebuild,
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date,
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realpath,
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stat,
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cut,
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head,
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grep,
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grub-reboot,
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shutdown,
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bootctl,
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systemd-analyze,
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upgradeFlag,
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units,
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jq,
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hostname,
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...
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}:
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''
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do_update() {
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last_flake_update_time() {
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nix flake metadata --refresh --json "$1" | ${jq} .lastModified
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}
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updated_since_reboot() {
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[[ $(${stat} -c %Y /run/current-system) -gt $(($(${date} +%s) - $(${cut} -d. -f1 /proc/uptime) + $(${units} --compact --one-line "ceil($(${units} --compact --one-line "$(${systemd-analyze} time | head -n 1 | ${grep} -Eo "\S+\s+$")" seconds))"))) ]]
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}
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boot_system_path() {
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bpath=""
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btime=0
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for f in /nix/var/nix/profiles/*
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do
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if [[ -z $bpath ]] || [[ $btime -lt $(${stat} -c %Y $f) ]]
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then
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bpath=$f
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btime=$(${stat} -c %Y $f)
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fi
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done
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if [[ -d "/nix/var/nix/profiles/system-profiles/" ]] && [[ -n "$(ls -A /nix/var/nix/profiles/system-profiles/)" ]]
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then
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for f in /nix/var/nix/profiles/system-profiles/*
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do
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if [[ -z $bpath ]] || [[ $btime -lt $(${stat} -c %Y $f) ]]
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then
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bpath=$f
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btime=$(${stat} -c %Y $f)
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fi
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done
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fi
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echo "$bpath"
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}
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last_update_time() {
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rpath=$(${realpath} /run/current-system)
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rtime=$(${stat} -c %Y /run/current-system)
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boot_system=$(boot_system_path)
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bpath=$(${realpath} "$boot_system")
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btime=$(${stat} -c %Y "$boot_system")
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if [[ "''${rpath}" == "''${bpath}" ]]
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then
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if ! updated_since_reboot
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then
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echo $btime
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return
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fi
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fi
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if [[ $rtime -gt $btime ]]
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then
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echo $rtime
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else
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echo $btime
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fi
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}
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hostname=$(${hostname})
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flake_update_time=$(last_flake_update_time "${cfg.flake}")
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new_system=$(nix build --refresh --no-link --print-out-paths "${cfg.flake}#nixosConfigurations.''${hostname}.config.system.build.toplevel")
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latest_system=$(boot_system_path)
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if [[ "$(${realpath} /run/booted-system)" == "$(${realpath} /run/current-system)" ]] && [[ "$(${realpath} /run/booted-system)" == "$(${realpath} "$latest_system")" ]]
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then
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if [[ -f /boot/grub/grub.cfg ]]
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then
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if [[ $(($(${date} +%s) - $(${cut} -d. -f1 /proc/uptime))) -gt $(${stat} -c %Y /boot/grub/grub.cfg) ]]
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then
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echo "persisting boot system"
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"$(${realpath} /run/booted-system)/bin/switch-to-configuration" "boot"
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fi
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fi
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fi
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if [[ "$new_system" == "$(${realpath} /run/current-system)" ]] && [[ "$new_system" == "$(${realpath} "$latest_system")" ]]
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then
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echo "system is up-to-date"
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exit 0
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fi
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system_update_time=$(last_update_time)
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echo "last system update: $(${date} -d @"$system_update_time")"
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echo "last flake update: $(${date} -d @"$flake_update_time")"
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if [[ -z "$1" ]] && [[ "$system_update_time" -gt "$flake_update_time" ]]
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then
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echo ""
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echo "System is newer than remote!"
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echo "This happens if the system was updated manually or a system update failed."
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echo "Skipping system update to prevent potential downgrade!"
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exit 0
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fi
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echo "Updating system ..."
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system_info_booted="$(${realpath} /run/booted-system/{initrd,kernel,kernel-modules})"
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system_info_built="$(${realpath} "''${new_system}"/{initrd,kernel,kernel-modules})"
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echo $system_info_booted
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echo $system_info_built
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current_time="$(${date} +%H:%M)"
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lower=${cfg.rebootWindow.lower}
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upper=${cfg.rebootWindow.upper}
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if [[ "''${lower}" < "''${upper}" ]]; then
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if [[ "''${current_time}" > "''${lower}" ]] && \
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[[ "''${current_time}" < "''${upper}" ]]; then
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do_reboot="true"
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else
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do_reboot="false"
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fi
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else
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# lower > upper, so we are crossing midnight (e.g. lower=23h, upper=6h)
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# we want to reboot if cur > 23h or cur < 6h
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if [[ "''${current_time}" < "''${upper}" ]] || \
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[[ "''${current_time}" > "''${lower}" ]]; then
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do_reboot="true"
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else
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do_reboot="false"
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fi
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fi
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if [[ "$system_info_booted" != "$system_info_built" ]]
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then
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echo "Updating system requires reboot!"
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if [ "''${do_reboot}" != true ]
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then
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echo "Outside of configured reboot window, skipping update."
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exit 0
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fi
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nix-env --profile /nix/var/nix/profiles/system --set "$new_system"
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if [[ -f /boot/grub/grub.cfg ]]
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then
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echo "bootloader 'GRUB' detected, configuring test-boot into new system"
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#"''${latest_system}/bin/switch-to-configuration" "boot"
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#"/run/booted-system/bin/switch-to-configuration" "boot"
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"/run/current-system/bin/switch-to-configuration" "boot"
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${grub-reboot} "NixOS - All configurations>0"
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#${grub-reboot} "NixOS - Profile '$PROFILE_NAME'>0"
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elif ${bootctl} list 2>&1 | ${grep} -v "No boot loader entries found." > /dev/null
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then
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echo "bootloader 'systemd-boot' detected, configuring oneshot-boot into new system"
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# TODO
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exit -1
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else
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echo "test-boot not supported. persisting new boot system"
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"''${new_system}/bin/switch-to-configuration" "boot"
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fi
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${shutdown} -r +1
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else
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nix-env --profile /nix/var/nix/profiles/system --set "$new_system"
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if ! "''${new_system}/bin/switch-to-configuration" "test"
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then
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echo "testing new configuration failed!"
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echo "system was automatically rolled back to old configuration."
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exit 1
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fi
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"''${new_system}/bin/switch-to-configuration" "boot"
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fi
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if [[ "$(last_flake_update_time "${cfg.flake}")" -gt "$flake_update_time" ]]
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then
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echo "flake was update after last update."
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do_update force
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fi
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}
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do_update
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''
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