diff options
Diffstat (limited to '')
| -rwxr-xr-x | pkgs/apply-config/apply-config | 134 | ||||
| -rw-r--r-- | pkgs/apply-config/default.nix | 14 | ||||
| -rw-r--r-- | pkgs/overlay.nix | 2 |
3 files changed, 150 insertions, 0 deletions
diff --git a/pkgs/apply-config/apply-config b/pkgs/apply-config/apply-config new file mode 100755 index 0000000..0ab7ff0 --- /dev/null +++ b/pkgs/apply-config/apply-config @@ -0,0 +1,134 @@ +#!/usr/bin/env gosh + +(use gauche.parseopt) +(use gauche.process) +(use util.match) + +(define action #f) +(define attribute + (string-append "nixosConfigurations." (sys-gethostname))) +(define keep #f) +(define specialisation #f) +(define verbose #f) +(define extra-nix-args '()) +(define config-path ".") + + +(define (usage progname) + (display +#"~|progname|: Activate a nixos configuration. + +Usage: ~|progname| [OPTIONS] [PATH] ACTION + +where ACTION is one of the actions which can be passed to switch-to-configuration +(i.e. dry-activate, switch, test, or boot). + +Options: + -A --attr Attribute which evaluates to a (built) configuration. + Defaults to nixosConfigurations.<hostname> + -k --keep Add a garbage collection root for the built configuration. + -s --specialisation Specialisation to apply. + -v --verbose Display commands before they are run. + -h --help Print this help message. +")) + + +(define (run-command cmd) + (when verbose + (display cmd (standard-error-port))) + (do-process! cmd)) + +(define (log-msg msg) + (display msg (standard-error-port))) + +(define (log-verbose msg) + (when verbose + (log-msg msg))) + +(define (main args) + (let-args + (cdr args) + ((o-verbose "v|verbose") + ; these are taken from nix-build + (o-attribute "A|attr=s") + (o-keep "k|keep") + (o-specialisation "s|specialisation=s") + (help "h|help" => + (cut (begin (usage (car args)) (exit 0)))) + (else (opt . _) + (print "unknown option: " opt "\n") (usage (car args)) (exit 1)) + . restargs) + + (when o-attribute + (set! attribute o-attribute)) + (set! keep o-keep) + (set! specialisation o-specialisation) + (set! verbose o-verbose) + + (match restargs + [((or "dry-activate" "switch" "test" "boot")) + (set! action (string->symbol (car restargs)))] + [(path (or "dry-activate" "switch" "test" "boot")) + (set! action (string->symbol (cadr restargs))) + (set! config-path path)] + [_ (begin (usage (car args)) (exit 1))]) + + (when (and specialisation (not (or (equal? action "test") (equal? action "switch")))) + (log-msg "Error: --specialisation can only be used with `test' or `switch'") + (exit 1)) + + (log-verbose (format "action: ~a" action)) + + + (let ([built-config (build-config)]) + (log-verbose (format "built config is ~a" built-config)) + (install-in-env built-config) + (switch-to-configuration built-config)))) + + +(define (build-config) + (define (optional b args) + (if b args '())) + (define nix-cmd + (append + ; use nix-build since it actually prints the outpath + `(nix-build ,config-path --no-out-link --log-format bar-with-logs) + (optional attribute (list '-A (string-append attribute ".config.system.build.toplevel"))) + extra-nix-args)) + (log-verbose nix-cmd) + (process-output->string + nix-cmd :on-abnormal-exit :error)) + + +(define (install-in-env built-config) + (define cmd + '(nix-env -p /nix/var/nix/profiles/system --set ,built-config)) + + (if (or (equal? action 'switch) (equal? action 'boot)) + (begin + (log-verbose cmd) + do-process! cmd) + (log-verbose + "skipping nix-env profile installation"))) + + +(define (switch-to-configuration built-config) + (define cmd + `(systemd-run + -E LOCALE_ARCHIVE + -E NIXOS_INSTALL_BOOTLOADER + --collect + ;; --no-ask-password + --pty + --quiet + --same-dir + --service-type=exec + --unit=nixos-rebuild-switch-to-configuration + --wait + ,(string-append built-config "/bin/switch-to-configuration") + ,action)) + + (log-verbose cmd) + (unless (do-process cmd) + (log "warning: error(s) occurred while switching to the new configuration"))) + diff --git a/pkgs/apply-config/default.nix b/pkgs/apply-config/default.nix new file mode 100644 index 0000000..03ba1f9 --- /dev/null +++ b/pkgs/apply-config/default.nix @@ -0,0 +1,14 @@ +{ stdenvNoCC, gauche }: + +stdenvNoCC.mkDerivation { + name = "apply-config"; + + src = ./.; + + buildInputs = [ gauche ]; + + installPhase = '' + mkdir -p $out/bin + cp apply-config $out/bin + ''; +} diff --git a/pkgs/overlay.nix b/pkgs/overlay.nix index f7e4c5f..e3897c1 100644 --- a/pkgs/overlay.nix +++ b/pkgs/overlay.nix @@ -200,6 +200,8 @@ in nomsring = super.haskellPackages.callPackage ./nomsring {}; + apply-config = self.callPackage ./apply-config {}; + #### sporadically maintained / updated #### hikari_unstable = (unstable.hikari.overrideAttrs (old: { |