diff options
Diffstat (limited to 'guix/scripts')
| -rw-r--r-- | guix/scripts/home.scm | 512 |
1 files changed, 512 insertions, 0 deletions
diff --git a/guix/scripts/home.scm b/guix/scripts/home.scm new file mode 100644 index 0000000000..9eb5c0c917 --- /dev/null +++ b/guix/scripts/home.scm @@ -0,0 +1,512 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2021 Andrew Tropin <andrew@trop.in> +;;; Copyright © 2021 Xinglu Chen <public@yoctocell.xyz> +;;; +;;; This file is part of GNU Guix. +;;; +;;; GNU Guix is free software; you can redistribute it and/or modify it +;;; under the terms of the GNU General Public License as published by +;;; the Free Software Foundation; either version 3 of the License, or (at +;;; your option) any later version. +;;; +;;; GNU Guix is distributed in the hope that it will be useful, but +;;; WITHOUT ANY WARRANTY; without even the implied warranty of +;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;;; GNU General Public License for more details. +;;; +;;; You should have received a copy of the GNU General Public License +;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. + +(define-module (guix scripts home) + #:use-module (gnu packages admin) + #:use-module ((gnu services) #:hide (delete)) + #:use-module (gnu packages) + #:use-module (gnu home) + #:use-module (gnu home-services) + #:use-module (guix channels) + #:use-module (guix derivations) + #:use-module (guix ui) + #:use-module (guix grafts) + #:use-module (guix packages) + #:use-module (guix profiles) + #:use-module (guix store) + #:use-module (guix utils) + #:use-module (guix scripts) + #:use-module (guix scripts package) + #:use-module (guix scripts build) + #:use-module (guix scripts system search) + #:autoload (guix scripts pull) (channel-commit-hyperlink) + ;; #:use-module (guix scripts home import) + #:use-module ((guix status) #:select (with-status-verbosity)) + #:use-module (guix gexp) + #:use-module (guix monads) + #:use-module (srfi srfi-1) + #:use-module (srfi srfi-26) + #:use-module (srfi srfi-35) + #:use-module (srfi srfi-37) + #:use-module (ice-9 match) + #:export (guix-home)) + + +;;; +;;; Options. +;;; + +(define %user-module + (make-user-module '((gnu home)))) + +(define %guix-home + (string-append %profile-directory "/guix-home")) + +(define (show-help) + (display (G_ "Usage: guix home [OPTION ...] ACTION [ARG ...] [FILE] +Build the home environment declared in FILE according to ACTION. +Some ACTIONS support additional ARGS.\n")) + (newline) + (display (G_ "The valid values for ACTION are:\n")) + (newline) + (display (G_ "\ + search search for existing service types\n")) + (display (G_ "\ + reconfigure switch to a new home environment configuration\n")) + (display (G_ "\ + roll-back switch to the previous home environment configuration\n")) + (display (G_ "\ + describe describe the current home environment\n")) + (display (G_ "\ + list-generations list the home environment generations\n")) + (display (G_ "\ + switch-generation switch to an existing home environment configuration\n")) + (display (G_ "\ + delete-generations delete old home environment generations\n")) + (display (G_ "\ + build build the home environment without installing anything\n")) + (display (G_ "\ + import generates a home environment definition from dotfiles\n")) + + (show-build-options-help) + (display (G_ " + -v, --verbosity=LEVEL use the given verbosity LEVEL")) + (newline) + (display (G_ " + -h, --help display this help and exit")) + (display (G_ " + -V, --version display version information and exit")) + (newline) + (show-bug-report-information)) + +(define (verbosity-level opts) + "Return the verbosity level based on OPTS, the alist of parsed options." + (or (assoc-ref opts 'verbosity) + (if (eq? (assoc-ref opts 'action) 'build) + 2 1))) + +(define %options + ;; Specification of the command-line options. + (cons* (option '(#\h "help") #f #f + (lambda args + (show-help) + (exit 0))) + (option '(#\V "version") #f #f + (lambda args + (show-version-and-exit "guix show"))) + (option '(#\v "verbosity") #t #f + (lambda (opt name arg result) + (let ((level (string->number* arg))) + (alist-cons 'verbosity level + (alist-delete 'verbosity result))))) + %standard-build-options)) + +(define %default-options + `((build-mode . ,(build-mode normal)) + (graft? . #t) + (substitutes? . #t) + (offload? . #t) + (print-build-trace? . #t) + (print-extended-build-trace? . #t) + (multiplexed-build-output? . #t) + (verbosity . 3) + (debug . 0))) + + +;;; +;;; Actions. +;;; + +(define* (perform-action action he + #:key + dry-run? + derivations-only? + use-substitutes?) + "Perform ACTION for home environment. " + + (define println + (cut format #t "~a~%" <>)) + + (mlet* %store-monad + ((he-drv (home-environment-derivation he)) + (drvs (mapm/accumulate-builds lower-object (list he-drv))) + (% (if derivations-only? + (return + (for-each (compose println derivation-file-name) drvs)) + (built-derivations drvs))) + + (he-out-path -> (derivation->output-path he-drv))) + (if (or dry-run? derivations-only?) + (return #f) + (begin + (for-each (compose println derivation->output-path) drvs) + + (case action + ((reconfigure) + (let* ((number (generation-number %guix-home)) + (generation (generation-file-name + %guix-home (+ 1 number)))) + + (switch-symlinks generation he-out-path) + (switch-symlinks %guix-home generation) + (setenv "GUIX_NEW_HOME" he-out-path) + (primitive-load (string-append he-out-path "/activate")) + (setenv "GUIX_NEW_HOME" #f) + (return he-out-path))) + (else + (newline) + (return he-out-path))))))) + +(define (process-action action args opts) + "Process ACTION, a sub-command, with the arguments are listed in ARGS. +ACTION must be one of the sub-commands that takes a home environment +declaration as an argument (a file name.) OPTS is the raw alist of options +resulting from command-line parsing." + (define (ensure-home-environment file-or-exp obj) + (unless (home-environment? obj) + (leave (G_ "'~a' does not return a home environment ~%") + file-or-exp)) + obj) + + (let* ((file (match args + (() #f) + ((x . _) x))) + (expr (assoc-ref opts 'expression)) + (system (assoc-ref opts 'system)) + + (transform (lambda (obj) + (home-environment-with-provenance obj file))) + + (home-environment + (transform + (ensure-home-environment + (or file expr) + (cond + ((and expr file) + (leave + (G_ "both file and expression cannot be specified~%"))) + (expr + (read/eval expr)) + (file + (load* file %user-module + #:on-error (assoc-ref opts 'on-error))) + (else + (leave (G_ "no configuration specified~%"))))))) + + (dry? (assoc-ref opts 'dry-run?))) + + (with-store store + (set-build-options-from-command-line store opts) + (with-build-handler (build-notifier #:use-substitutes? + (assoc-ref opts 'substitutes?) + #:verbosity + (verbosity-level opts) + #:dry-run? + (assoc-ref opts 'dry-run?)) + + (run-with-store store + (mbegin %store-monad + (set-guile-for-build (default-guile)) + + (case action + (else + (perform-action action home-environment + #:dry-run? dry? + #:derivations-only? (assoc-ref opts 'derivations-only?) + #:use-substitutes? (assoc-ref opts 'substitutes?)) + )))))) + (warn-about-disk-space))) + + +(define (process-command command args opts) + "Process COMMAND, one of the 'guix home' sub-commands. ARGS is its +argument list and OPTS is the option alist." + (define-syntax-rule (with-store* store exp ...) + (with-store store + (set-build-options-from-command-line store opts) + exp ...)) + (case command + ;; The following commands do not need to use the store, and they do not need + ;; an home environment file. + ((search) + (apply search args)) + ((import) + (let* ((profiles (delete-duplicates + (match (filter-map (match-lambda + (('profile . p) p) + (_ #f)) + opts) + (() (list %current-profile)) + (lst (reverse lst))))) + (manifest (concatenate-manifests + (map profile-manifest profiles)))) + (import-manifest manifest (current-output-port)))) + ((describe) + (match (generation-number %guix-home) + (0 + (error (G_ "no home environment generation, nothing to describe~%"))) + (generation + (display-home-environment-generation generation)))) + ((list-generations) + (let ((pattern (match args + (() #f) + ((pattern) pattern) + (x (leave (G_ "wrong number of arguments~%")))))) + (list-generations pattern))) + ((switch-generation) + (let ((pattern (match args + ((pattern) pattern) + (x (leave (G_ "wrong number of arguments~%")))))) + (with-store* store + (switch-to-home-environment-generation store pattern)))) + ((roll-back) + (let ((pattern (match args + (() "") + (x (leave (G_ "wrong number of arguments~%")))))) + (with-store* store + (roll-back-home-environment store)))) + ((delete-generations) + (let ((pattern (match args + (() #f) + ((pattern) pattern) + (x (leave (G_ "wrong number of arguments~%")))))) + (with-store* + store + (delete-matching-generations store %guix-home pattern)))) + (else (process-action command args opts)))) + +(define-command (guix-home . args) + (synopsis "build and deploy home environments") + + (define (parse-sub-command arg result) + ;; Parse sub-command ARG and augment RESULT accordingly. + (if (assoc-ref result 'action) + (alist-cons 'argument arg result) + (let ((action (string->symbol arg))) + (case action + ((build + reconfigure + extension-graph shepherd-graph + list-generations describe + delete-generations roll-back + switch-generation search + import) + (alist-cons 'action action result)) + (else (leave (G_ "~a: unknown action~%") action)))))) + + (define (match-pair car) + ;; Return a procedure that matches a pair with CAR. + (match-lambda + ((head . tail) + (and (eq? car head) tail)) + (_ #f))) + + (define (option-arguments opts) + ;; Extract the plain arguments from OPTS. + (let* ((args (reverse (filter-map (match-pair 'argument) opts))) + (count (length args)) + (action (assoc-ref opts 'action)) + (expr (assoc-ref opts 'expression))) + (define (fail) + (leave (G_ "wrong number of arguments for action '~a'~%") + action)) + + (unless action + (format (current-error-port) + (G_ "guix home: missing command name~%")) + (format (current-error-port) + (G_ "Try 'guix home --help' for more information.~%")) + (exit 1)) + + (case action + ((build reconfigure) + (unless (or (= count 1) + (and expr (= count 0))) + (fail))) + ((init) + (unless (= count 2) + (fail)))) + args)) + + (with-error-handling + (let* ((opts (parse-command-line args %options + (list %default-options) + #:argument-handler + parse-sub-command)) + (args (option-arguments opts)) + (command (assoc-ref opts 'action))) + (parameterize ((%graft? (assoc-ref opts 'graft?))) + (with-status-verbosity (verbosity-level opts) + (process-command command args opts)))))) + + +;;; +;;; Searching. +;;; + +(define service-type-name* + (compose symbol->string service-type-name)) + +(define (service-type-description-string type) + "Return the rendered and localised description of TYPE, a service type." + (and=> (service-type-description type) + (compose texi->plain-text P_))) + +(define %service-type-metrics + ;; Metrics used to estimate the relevance of a search result. + `((,service-type-name* . 3) + (,service-type-description-string . 2) + (,(lambda (type) + (match (and=> (service-type-location type) location-file) + ((? string? file) + (basename file ".scm")) + (#f + ""))) + . 1))) + +(define (find-service-types regexps) + "Return a list of service type/score pairs: service types whose name or +description matches REGEXPS sorted by relevance, and their score." + (let ((matches (fold-home-service-types + (lambda (type result) + (match (relevance type regexps + %service-type-metrics) + ((? zero?) + result) + (score + (cons (cons type score) result)))) + '()))) + (sort matches + (lambda (m1 m2) + (match m1 + ((type1 . score1) + (match m2 + ((type2 . score2) + (if (= score1 score2) + (string>? (service-type-name* type1) + (service-type-name* type2)) + (> score1 score2)))))))))) + +(define (search . args) + (with-error-handling + (let* ((regexps (map (cut make-regexp* <> regexp/icase) args)) + (matches (find-service-types regexps))) + (leave-on-EPIPE + (display-search-results matches (current-output-port) + #:print service-type->recutils + #:command "guix home search"))))) + + +;;; +;;; Generations. +;;; + +(define* (display-home-environment-generation + number + #:optional (profile %guix-home)) + "Display a summary of home-environment generation NUMBER in a +human-readable format." + (define (display-channel channel) + (format #t " ~a:~%" (channel-name channel)) + (format #t (G_ " repository URL: ~a~%") (channel-url channel)) + (when (channel-branch channel) + (format #t (G_ " branch: ~a~%") (channel-branch channel))) + (format #t (G_ " commit: ~a~%") + (if (supports-hyperlinks?) + (channel-commit-hyperlink channel) + (channel-commit channel)))) + + (unless (zero? number) + (let* ((generation (generation-file-name profile number))) + (define-values (channels config-file) + ;; The function will work for home environments too, we just + ;; need to keep provenance file. + (system-provenance generation)) + + (display-generation profile number) + (format #t (G_ " file name: ~a~%") generation) + (format #t (G_ " canonical file name: ~a~%") (readlink* generation)) + ;; TRANSLATORS: Please preserve the two-space indentation. + + (unless (null? channels) + ;; TRANSLATORS: Here "channel" is the same terminology as used in + ;; "guix describe" and "guix pull --channels". + (format #t (G_ " channels:~%")) + (for-each display-channel channels)) + (when config-file + (format #t (G_ " configuration file: ~a~%") + (if (supports-hyperlinks?) + (file-hyperlink config-file) + config-file)))))) + +(define* (list-generations pattern #:optional (profile %guix-home)) + "Display in a human-readable format all the home environment +generations matching PATTERN, a string. When PATTERN is #f, display +all the home environment generations." + (cond ((not (file-exists? profile)) ; XXX: race condition + (raise (condition (&profile-not-found-error + (profile profile))))) + ((not pattern) + (for-each display-home-environment-generation (profile-generations profile))) + ((matching-generations pattern profile) + => + (lambda (numbers) + (if (null-list? numbers) + (exit 1) + (leave-on-EPIPE + (for-each display-home-environment-generation numbers))))))) + + +;;; +;;; Switch generations. +;;; + +;; TODO: Make it public in (guix scripts system) +(define-syntax-rule (unless-file-not-found exp) + (catch 'system-error + (lambda () + exp) + (lambda args + (if (= ENOENT (system-error-errno args)) + #f + (apply throw args))))) + +(define (switch-to-home-environment-generation store spec) + "Switch the home-environment profile to the generation specified by +SPEC. STORE is an open connection to the store." + (let* ((number (relative-generation-spec->number %guix-home spec)) + (generation (generation-file-name %guix-home number)) + (activate (string-append generation "/activate"))) + (if number + (begin + (setenv "GUIX_NEW_HOME" (readlink generation)) + (switch-to-generation* %guix-home number) + (unless-file-not-found (primitive-load activate)) + (setenv "GUIX_NEW_HOME" #f)) + (leave (G_ "cannot switch to home environment generation '~a'~%") spec)))) + + +;;; +;;; Roll-back. +;;; + +(define (roll-back-home-environment store) + "Roll back the home-environment profile to its previous generation. +STORE is an open connection to the store." + (switch-to-home-environment-generation store "-1")) |