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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2017 Marius Bakke <mbakke@fastmail.com>
;;;
;;; 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 pull)
#:use-module (guix ui)
#:use-module (guix utils)
#:use-module (guix scripts)
#:use-module (guix store)
#:use-module (guix config)
#:use-module (guix packages)
#:use-module (guix derivations)
#:use-module (guix profiles)
#:use-module (guix gexp)
#:use-module (guix grafts)
#:use-module (guix monads)
#:use-module (guix scripts build)
#:autoload (guix self) (whole-package)
#:autoload (gnu packages ssh) (guile-ssh)
#:autoload (gnu packages tls) (gnutls)
#:use-module ((guix scripts package) #:select (build-and-use-profile))
#:use-module ((guix build utils)
#:select (with-directory-excursion delete-file-recursively))
#:use-module ((guix build download)
#:select (%x509-certificate-directory))
#:use-module (gnu packages base)
#:use-module (gnu packages guile)
#:use-module ((gnu packages bootstrap)
#:select (%bootstrap-guile))
#:use-module ((gnu packages certs) #:select (le-certs))
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-37)
#:use-module (ice-9 match)
#:export (guix-pull))
(module-autoload! (resolve-module '(guix scripts pull))
'(git) '(git-error? set-tls-certificate-locations!)
'(guix git) '(latest-repository-commit))
(define (ensure-guile-git!)
;; Previously Guile-Git was not a prerequisite. Thus, someone running 'guix
;; pull' on an old installation may be lacking Guile-Git. To address this,
;; we autoload things that depend on Guile-Git and check in the entry point
;; whether Guile-Git is available.
;;
;; TODO: Remove this hack when Guile-Git is widespread or enforced.
(unless (false-if-exception (resolve-interface '(git)))
(leave (G_ "Guile-Git is missing but it is now required by 'guix pull'.
Install it by running:
guix package -i ~a
export GUILE_LOAD_PATH=$HOME/.guix-profile/share/guile/site/~a:$GUILE_LOAD_PATH
export GUILE_LOAD_COMPILED_PATH=$HOME/.guix-profile/lib/guile/~a/site-ccache:$GUILE_LOAD_COMPILED_PATH
\n")
(match (effective-version)
("2.0" "guile2.0-git")
(_ "guile-git"))
(effective-version)
(effective-version)))
;; XXX: For unclear reasons this is needed for
;; 'set-tls-certificate-locations!'.
(module-use! (resolve-module '(guix scripts pull))
(resolve-interface '(git))))
(define %repository-url
(or (getenv "GUIX_PULL_URL") "https://git.savannah.gnu.org/git/guix.git"))
;;;
;;; Command-line options.
;;;
(define %default-options
;; Alist of default option values.
`((repository-url . ,%repository-url)
(ref . (branch . "origin/master"))
(system . ,(%current-system))
(substitutes? . #t)
(build-hook? . #t)
(graft? . #t)
(verbosity . 0)))
(define (show-help)
(display (G_ "Usage: guix pull [OPTION]...
Download and deploy the latest version of Guix.\n"))
(display (G_ "
--verbose produce verbose output"))
(display (G_ "
--url=URL download from the Git repository at URL"))
(display (G_ "
--commit=COMMIT download the specified COMMIT"))
(display (G_ "
--branch=BRANCH download the tip of the specified BRANCH"))
(display (G_ "
--bootstrap use the bootstrap Guile to build the new Guix"))
(newline)
(show-build-options-help)
(display (G_ "
-h, --help display this help and exit"))
(display (G_ "
-V, --version display version information and exit"))
(newline)
(show-bug-report-information))
(define %options
;; Specifications of the command-line options.
(cons* (option '("verbose") #f #f
(lambda (opt name arg result)
(alist-cons 'verbose? #t result)))
(option '("url") #t #f
(lambda (opt name arg result)
(alist-cons 'repository-url arg
(alist-delete 'repository-url result))))
(option '("commit") #t #f
(lambda (opt name arg result)
(alist-cons 'ref `(commit . ,arg) result)))
(option '("branch") #t #f
(lambda (opt name arg result)
(alist-cons 'ref `(branch . ,(string-append "origin/" arg))
result)))
(option '(#\n "dry-run") #f #f
(lambda (opt name arg result)
(alist-cons 'dry-run? #t (alist-cons 'graft? #f result))))
(option '("bootstrap") #f #f
(lambda (opt name arg result)
(alist-cons 'bootstrap? #t result)))
(option '(#\h "help") #f #f
(lambda args
(show-help)
(exit 0)))
(option '(#\V "version") #f #f
(lambda args
(show-version-and-exit "guix pull")))
%standard-build-options))
(define what-to-build
(store-lift show-what-to-build))
(define indirect-root-added
(store-lift add-indirect-root))
(define %self-build-file
;; The file containing code to build Guix. This serves the same purpose as
;; a makefile, and, similarly, is intended to always keep this name.
"build-aux/build-self.scm")
(define %pull-version
;; This is the version of the 'guix pull' protocol. It specifies what's
;; expected from %SELF-BUILD-FILE. The initial version ("0") was when we'd
;; place a set of compiled Guile modules in ~/.config/guix/latest.
1)
(define* (build-from-source source
#:key verbose? commit)
"Return a derivation to build Guix from SOURCE, using the self-build script
contained therein. Use COMMIT as the version string."
;; Running the self-build script makes it easier to update the build
;; procedure: the self-build script of the Guix-to-be-installed contains the
;; right dependencies, build procedure, etc., which the Guix-in-use may not
;; be know.
(let* ((script (string-append source "/" %self-build-file))
(build (primitive-load script)))
;; BUILD must be a monadic procedure of at least one argument: the source
;; tree.
;;
;; Note: BUILD can return #f if it does not support %PULL-VERSION. In the
;; future we'll fall back to a previous version of the protocol when that
;; happens.
(build source #:verbose? verbose? #:version commit
#:pull-version %pull-version)))
(define (whole-package-for-legacy name modules)
"Return a full-blown Guix package for MODULES, a derivation that builds Guix
modules in the old ~/.config/guix/latest style."
(whole-package name modules
;; In the "old style", %SELF-BUILD-FILE would simply return a
;; derivation that builds modules. We have to infer what the
;; dependencies of these modules were.
(list guile-json guile-git guile-bytestructures
guile-ssh gnutls)))
(define (derivation->manifest-entry drv commit)
"Return a manifest entry for DRV, which represents Guix at COMMIT."
(mbegin %store-monad
(what-to-build (list drv))
(built-derivations (list drv))
(let ((out (derivation->output-path drv)))
(return (manifest-entry
(name "guix")
(version (string-take commit 7))
(item (if (file-exists? (string-append out "/bin/guix"))
drv
(whole-package-for-legacy (string-append name "-"
version)
drv))))))))
(define* (build-and-install source config-dir
#:key verbose? commit)
"Build the tool from SOURCE, and install it in CONFIG-DIR."
(define update-profile
(store-lift build-and-use-profile))
(mlet* %store-monad ((drv (build-from-source source
#:commit commit
#:verbose? verbose?))
(entry (derivation->manifest-entry drv commit)))
(update-profile (string-append config-dir "/current")
(manifest (list entry)))))
(define (honor-lets-encrypt-certificates! store)
"Tell Guile-Git to use the Let's Encrypt certificates."
(let* ((drv (package-derivation store le-certs))
(certs (string-append (derivation->output-path drv)
"/etc/ssl/certs")))
(build-derivations store (list drv))
;; In the past Guile-Git would not provide this procedure.
(if (module-defined? (resolve-interface '(git))
'set-tls-certificate-locations!)
(set-tls-certificate-locations! certs)
(begin
;; In this case we end up using whichever certificates OpenSSL
;; chooses to use: $SSL_CERT_FILE, $SSL_CERT_DIR, or /etc/ssl/certs.
(warning (G_ "cannot enforce use of the Let's Encrypt \
certificates~%"))
(warning (G_ "please upgrade Guile-Git~%"))))))
(define (report-git-error error)
"Report the given Guile-Git error."
;; Prior to Guile-Git commit b6b2760c2fd6dfaa5c0fedb43eeaff06166b3134,
;; errors would be represented by integers.
(match error
((? integer? error) ;old Guile-Git
(leave (G_ "Git error ~a~%") error))
((? git-error? error) ;new Guile-Git
(leave (G_ "Git error: ~a~%") (git-error-message error)))))
(define-syntax-rule (with-git-error-handling body ...)
(catch 'git-error
(lambda ()
body ...)
(lambda (key err)
(report-git-error err))))
(define (guix-pull . args)
(define (use-le-certs? url)
(string-prefix? "https://git.savannah.gnu.org/" url))
(with-error-handling
(with-git-error-handling
(let* ((opts (parse-command-line args %options
(list %default-options)))
(url (assoc-ref opts 'repository-url))
(ref (assoc-ref opts 'ref))
(cache (string-append (cache-directory) "/pull")))
(ensure-guile-git!)
(unless (assoc-ref opts 'dry-run?) ;XXX: not very useful
(with-store store
(parameterize ((%graft? (assoc-ref opts 'graft?)))
(set-build-options-from-command-line store opts)
;; For reproducibility, always refer to the LE certificates when we
;; know we're talking to Savannah.
(when (use-le-certs? url)
(honor-lets-encrypt-certificates! store))
(format (current-error-port)
(G_ "Updating from Git repository at '~a'...~%")
url)
(let-values (((checkout commit)
(latest-repository-commit store url
#:ref ref
#:cache-directory cache)))
(format (current-error-port)
(G_ "Building from Git commit ~a...~%")
commit)
(parameterize ((%guile-for-build
(package-derivation
store
(if (assoc-ref opts 'bootstrap?)
%bootstrap-guile
(canonical-package guile-2.2)))))
(run-with-store store
(build-and-install checkout (config-directory)
#:commit commit
#:verbose?
(assoc-ref opts 'verbose?))))))))))))
;;; pull.scm ends here