Merge pull request #250501 from miallo/nixos-rebuild/list-generations
nixos-rebuild: Add list-generations
This commit is contained in:
Doron Behar
GitHub
commit
cfb7741028
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@ -8,6 +8,8 @@
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- LXD now supports virtual machine instances to complement the existing container support
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- The `nixos-rebuild` command has been given a `list-generations` subcommand. See `man nixos-rebuild` for more details.
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## New Services {#sec-release-23.11-new-services}
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- [MCHPRS](https://github.com/MCHPR/MCHPRS), a multithreaded Minecraft server built for redstone. Available as [services.mchprs](#opt-services.mchprs.enable).
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@ -3,6 +3,8 @@
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, coreutils
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, gnused
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, gnugrep
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, jq
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, util-linux
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, nix
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, lib
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, nixosTests
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@ -20,7 +22,7 @@ substituteAll {
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nix_x86_64_linux = fallback.x86_64-linux;
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nix_i686_linux = fallback.i686-linux;
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nix_aarch64_linux = fallback.aarch64-linux;
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path = lib.makeBinPath [ coreutils gnused gnugrep ];
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path = lib.makeBinPath [ coreutils gnused gnugrep jq util-linux ];
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nativeBuildInputs = [
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installShellFiles
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];
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@ -10,7 +10,7 @@
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.Sh SYNOPSIS
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.Nm
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.Bro
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.Cm switch | boot | test | build | dry-build | dry-activate | edit | build-vm | build-vm-with-bootloader
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.Cm switch | boot | test | build | dry-build | dry-activate | edit | build-vm | build-vm-with-bootloader | list-generations Op Fl -json
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.Brc
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.br
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.Op Fl -upgrade | -upgrade-all
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@ -196,6 +196,14 @@ The boot loader is installed on an automatically generated virtual disk
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containing a
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.Pa /boot
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partition.
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.
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.It Cm list-generations Op Fl -json
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List the available generations in a similar manner to the boot loader
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menu. It shows the generation number, build date and time, NixOS version,
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kernel version and the configuration revision. This is useful to get
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information e.g. for which generation to roll back to with
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.Ic nixos-rebuild switch Fl -generation Ar N
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There is also a json version of output available.
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.El
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.
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.
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@ -36,6 +36,7 @@ verboseScript=
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noFlake=
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# comma separated list of vars to preserve when using sudo
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preservedSudoVars=NIXOS_INSTALL_BOOTLOADER
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json=
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# log the given argument to stderr
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log() {
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@ -48,7 +49,7 @@ while [ "$#" -gt 0 ]; do
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--help)
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showSyntax
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;;
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switch|boot|test|build|edit|dry-build|dry-run|dry-activate|build-vm|build-vm-with-bootloader)
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switch|boot|test|build|edit|dry-build|dry-run|dry-activate|build-vm|build-vm-with-bootloader|list-generations)
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if [ "$i" = dry-run ]; then i=dry-build; fi
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# exactly one action mandatory, bail out if multiple are given
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if [ -n "$action" ]; then showSyntax; fi
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@ -146,6 +147,9 @@ while [ "$#" -gt 0 ]; do
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k="$1"; shift 1
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lockFlags+=("$i" "$j" "$k")
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;;
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--json)
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json=1
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;;
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*)
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log "$0: unknown option \`$i'"
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exit 1
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@ -507,6 +511,87 @@ if [ "$action" = dry-build ]; then
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extraBuildFlags+=(--dry-run)
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fi
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if [ "$action" = list-generations ]; then
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if [ ! -L "$profile" ]; then
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log "No profile \`$(basename "$profile")' found"
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exit 1
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fi
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generation_from_dir() {
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generation_dir="$1"
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generation_base="$(basename "$generation_dir")" # Has the format "system-123-link" for generation 123
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no_link_gen="${generation_base%-link}" # remove the "-link"
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echo "${no_link_gen##*-}" # remove everything before the last dash
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}
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describe_generation(){
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generation_dir="$1"
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generation_number="$(generation_from_dir "$generation_dir")"
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nixos_version="$(cat "$generation_dir/nixos-version" 2> /dev/null || echo "Unknown")"
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kernel_dir="$(dirname "$(realpath "$generation_dir/kernel")")"
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kernel_version="$(ls "$kernel_dir/lib/modules" || echo "Unknown")"
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configurationRevision="$("$generation_dir/sw/bin/nixos-version" --configuration-revision 2> /dev/null || true)"
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# Old nixos-version output ignored unknown flags and just printed the version
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# therefore the following workaround is done not to show the default output
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nixos_version_default="$("$generation_dir/sw/bin/nixos-version")"
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if [ "$configurationRevision" == "$nixos_version_default" ]; then
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configurationRevision=""
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fi
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# jq automatically quotes the output => don't try to quote it in output!
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build_date="$(stat "$generation_dir" --format=%W | jq 'todate')"
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pushd "$generation_dir/specialisation/" > /dev/null || :
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specialisation_list=(*)
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popd > /dev/null || :
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specialisations="$(jq --compact-output --null-input '$ARGS.positional' --args -- "${specialisation_list[@]}")"
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if [ "$(basename "$generation_dir")" = "$(readlink "$profile")" ]; then
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current_generation_tag="true"
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else
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current_generation_tag="false"
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fi
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# Escape userdefined strings
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nixos_version="$(jq -aR <<< "$nixos_version")"
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kernel_version="$(jq -aR <<< "$kernel_version")"
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configurationRevision="$(jq -aR <<< "$configurationRevision")"
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cat << EOF
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{
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"generation": $generation_number,
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"date": $build_date,
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"nixosVersion": $nixos_version,
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"kernelVersion": $kernel_version,
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"configurationRevision": $configurationRevision,
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"specialisations": $specialisations,
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"current": $current_generation_tag
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}
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EOF
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}
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find "$(dirname "$profile")" -regex "$profile-[0-9]+-link" |
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sort -Vr |
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while read -r generation_dir; do
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describe_generation "$generation_dir"
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done |
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if [ -z "$json" ]; then
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jq --slurp -r '.[] | [
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([.generation, (if .current == true then "current" else "" end)] | join(" ")),
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(.date | fromdate | strflocaltime("%Y-%m-%d %H:%M:%S")),
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.nixosVersion, .kernelVersion, .configurationRevision,
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(.specialisations | join(" "))
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] | @tsv' |
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column --separator $'\t' --table --table-columns "Generation,Build-date,NixOS version,Kernel,Configuration Revision,Specialisation" |
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${PAGER:cat}
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else
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jq --slurp .
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fi
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exit 0
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fi
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# Either upgrade the configuration in the system profile (for "switch"
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# or "boot"), or just build it and create a symlink "result" in the
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