guix/scripts.scm

   1 ;;; GNU Guix --- Functional package management for GNU
   2 ;;; Copyright © 2013, 2014, 2015, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
   3 ;;; Copyright © 2014 Deck Pickard <deck.r.pickard@gmail.com>
   4 ;;; Copyright © 2015, 2016 Alex Kost <alezost@gmail.com>
   5 ;;;
   6 ;;; This file is part of GNU Guix.
   7 ;;;
   8 ;;; GNU Guix is free software; you can redistribute it and/or modify it
   9 ;;; under the terms of the GNU General Public License as published by
  10 ;;; the Free Software Foundation; either version 3 of the License, or (at
  11 ;;; your option) any later version.
  12 ;;;
  13 ;;; GNU Guix is distributed in the hope that it will be useful, but
  14 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
  15 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 ;;; GNU General Public License for more details.
  17 ;;;
  18 ;;; You should have received a copy of the GNU General Public License
  19 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
  20
  21 (define-module (guix scripts)
  22   #:use-module (guix grafts)
  23   #:use-module (guix utils)
  24   #:use-module (guix ui)
  25   #:use-module (guix store)
  26   #:use-module (guix monads)
  27   #:use-module (guix packages)
  28   #:use-module (guix derivations)
  29   #:use-module ((guix profiles) #:select (%profile-directory))
  30   #:autoload   (guix describe) (current-profile-date)
  31   #:use-module (guix build syscalls)
  32   #:use-module (srfi srfi-1)
  33   #:use-module (srfi srfi-19)
  34   #:use-module (srfi srfi-37)
  35   #:use-module (ice-9 match)
  36   #:export (args-fold*
  37             parse-command-line
  38             maybe-build
  39             build-package
  40             build-package-source
  41             %distro-age-warning
  42             warn-about-old-distro
  43             %disk-space-warning
  44             warn-about-disk-space))
  45
  46 ;;; Commentary:
  47 ;;;
  48 ;;; General code for Guix scripts.
  49 ;;;
  50 ;;; Code:
  51
  52 (define (args-fold* options unrecognized-option-proc operand-proc . seeds)
  53   "A wrapper on top of `args-fold' that does proper user-facing error
  54 reporting."
  55   (catch 'misc-error
  56     (lambda ()
  57       (apply args-fold options unrecognized-option-proc
  58              operand-proc seeds))
  59     (lambda (key proc msg args . rest)
  60       ;; XXX: MSG is not i18n'd.
  61       (leave (G_ "invalid argument: ~a~%")
  62              (apply format #f msg args)))))
  63
  64 (define (environment-build-options)
  65   "Return additional build options passed as environment variables."
  66   (arguments-from-environment-variable "GUIX_BUILD_OPTIONS"))
  67
  68 (define %default-argument-handler
  69   ;; The default handler for non-option command-line arguments.
  70   (lambda (arg result)
  71     (alist-cons 'argument arg result)))
  72
  73 (define* (parse-command-line args options seeds
  74                              #:key
  75                              (build-options? #t)
  76                              (argument-handler %default-argument-handler))
  77   "Parse the command-line arguments ARGS according to OPTIONS (a list of
  78 SRFI-37 options) and return the result, seeded by SEEDS.  When BUILD-OPTIONS?
  79 is true, also pass arguments passed via the 'GUIX_BUILD_OPTIONS' environment
  80 variable.  Command-line options take precedence those passed via
  81 'GUIX_BUILD_OPTIONS'.
  82
  83 ARGUMENT-HANDLER is called for non-option arguments, like the 'operand-proc'
  84 parameter of 'args-fold'."
  85   (define (parse-options-from args seeds)
  86     ;; Actual parsing takes place here.
  87     (apply args-fold* args options
  88            (lambda (opt name arg . rest)
  89              (leave (G_ "~A: unrecognized option~%") name))
  90            argument-handler
  91            seeds))
  92
  93   (call-with-values
  94       (lambda ()
  95         (if build-options?
  96             (parse-options-from (environment-build-options) seeds)
  97             (apply values seeds)))
  98     (lambda seeds
  99       ;; ARGS take precedence over what the environment variable specifies.
 100       (parse-options-from args seeds))))
 101
 102 (define* (maybe-build drvs
 103                       #:key dry-run? use-substitutes?)
 104   "Show what will/would be built, and actually build DRVS, unless DRY-RUN? is
 105 true."
 106   (with-monad %store-monad
 107     (>>= (show-what-to-build* drvs
 108                               #:dry-run? dry-run?
 109                               #:use-substitutes? use-substitutes?)
 110          (lambda (_)
 111            (if dry-run?
 112                (return #f)
 113                (built-derivations drvs))))))
 114
 115 (define* (build-package package
 116                         #:key dry-run? (use-substitutes? #t)
 117                         #:allow-other-keys
 118                         #:rest build-options)
 119   "Build PACKAGE using BUILD-OPTIONS acceptable by 'set-build-options'.
 120 Show what and how will/would be built."
 121   (mlet %store-monad ((grafting? ((lift0 %graft? %store-monad))))
 122     (apply set-build-options*
 123            #:use-substitutes? use-substitutes?
 124            (strip-keyword-arguments '(#:dry-run?) build-options))
 125     (mlet %store-monad ((derivation (package->derivation
 126                                      package #:graft? (and (not dry-run?)
 127                                                            grafting?))))
 128       (mbegin %store-monad
 129         (maybe-build (list derivation)
 130                      #:use-substitutes? use-substitutes?
 131                      #:dry-run? dry-run?)
 132         (return (show-derivation-outputs derivation))))))
 133
 134 (define* (build-package-source package
 135                                #:key dry-run? (use-substitutes? #t)
 136                                #:allow-other-keys
 137                                #:rest build-options)
 138   "Build PACKAGE source using BUILD-OPTIONS."
 139   (mbegin %store-monad
 140     (apply set-build-options*
 141            #:use-substitutes? use-substitutes?
 142            (strip-keyword-arguments '(#:dry-run?) build-options))
 143     (mlet %store-monad ((derivation (origin->derivation
 144                                      (package-source package))))
 145       (mbegin %store-monad
 146         (maybe-build (list derivation)
 147                      #:use-substitutes? use-substitutes?
 148                      #:dry-run? dry-run?)
 149         (return (show-derivation-outputs derivation))))))
 150
 151 (define %distro-age-warning
 152   ;; The age (in seconds) above which we warn that the distro is too old.
 153   (make-parameter (match (and=> (getenv "GUIX_DISTRO_AGE_WARNING")
 154                                 string->duration)
 155                     (#f  (* 7 24 3600))
 156                     (age (time-second age)))))
 157
 158 (define* (warn-about-old-distro #:optional (old (%distro-age-warning))
 159                                 #:key (suggested-command
 160                                        "guix package -u"))
 161   "Emit a warning if Guix is older than OLD seconds."
 162   (define (seconds->days seconds)
 163     (round (/ seconds (* 3600 24))))
 164
 165   (define age
 166     (match (current-profile-date)
 167       (#f    #f)
 168       (date  (- (time-second (current-time time-utc))
 169                 date))))
 170
 171   (when (and age (>= age old))
 172     (warning (N_ "Your Guix installation is ~a day old.\n"
 173                  "Your Guix installation is ~a days old.\n"
 174                  (seconds->days age))
 175              (seconds->days age)))
 176   (when (and (or (not age) (>= age old))
 177              (not (getenv "GUIX_UNINSTALLED")))
 178     (warning (G_ "Consider running 'guix pull' followed by
 179 '~a' to get up-to-date packages and security updates.\n")
 180              suggested-command)
 181     (newline (guix-warning-port))))
 182
 183 (define %disk-space-warning
 184   ;; The fraction (between 0 and 1) of free disk space below which a warning
 185   ;; is emitted.
 186   (make-parameter (match (and=> (getenv "GUIX_DISK_SPACE_WARNING")
 187                                 string->number)
 188                     (#f        .05)               ;5%
 189                     (threshold (/ threshold 100.)))))
 190
 191 (define* (warn-about-disk-space #:optional profile
 192                                 #:key
 193                                 (threshold (%disk-space-warning)))
 194   "Display a hint about 'guix gc' if less than THRESHOLD of /gnu/store is
 195 available."
 196   (let* ((stats      (statfs (%store-prefix)))
 197          (block-size (file-system-block-size stats))
 198          (available  (* block-size (file-system-blocks-available stats)))
 199          (total      (* block-size (file-system-block-count stats)))
 200          (ratio      (/ available total 1.)))
 201     (when (< ratio threshold)
 202       (warning (G_ "only ~,1f% of free space available on ~a~%")
 203                (* ratio 100) (%store-prefix))
 204       (display-hint (format #f (G_ "Consider deleting old profile
 205 generations and collecting garbage, along these lines:
 206
 207 @example
 208 guix gc --delete-generations=1m
 209 @end example\n")
 210                             profile)))))
 211
 212 ;;; scripts.scm ends here