1466 lines
60 KiB
Scheme
1466 lines
60 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org>
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;;; Copyright © 2014, 2016 Alex Kost <alezost@gmail.com>
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;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
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;;; Copyright © 2015 Sou Bunnbu <iyzsong@gmail.com>
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;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
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;;; Copyright © 2016 Chris Marusich <cmmarusich@gmail.com>
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;;; Copyright © 2017 Huang Ying <huang.ying.caritas@gmail.com>
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;;; Copyright © 2017 Maxim Cournoyer <maxim.cournoyer@gmail.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (guix profiles)
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#:use-module ((guix utils) #:hide (package-name->name+version))
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#:use-module ((guix build utils)
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#:select (package-name->name+version))
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#:use-module (guix records)
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#:use-module (guix packages)
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#:use-module (guix derivations)
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#:use-module (guix search-paths)
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#:use-module (guix gexp)
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#:use-module (guix monads)
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#:use-module (guix store)
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#:use-module (guix sets)
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#:use-module (ice-9 vlist)
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#:use-module (ice-9 match)
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#:use-module (ice-9 regex)
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#:use-module (ice-9 ftw)
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#:use-module (ice-9 format)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-9)
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#:use-module (srfi srfi-11)
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#:use-module (srfi srfi-19)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:export (&profile-error
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profile-error?
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profile-error-profile
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&profile-not-found-error
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profile-not-found-error?
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&profile-collistion-error
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profile-collision-error?
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profile-collision-error-entry
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profile-collision-error-conflict
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&missing-generation-error
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missing-generation-error?
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missing-generation-error-generation
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manifest make-manifest
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manifest?
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manifest-entries
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manifest-transitive-entries
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<manifest-entry> ; FIXME: eventually make it internal
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manifest-entry
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manifest-entry?
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manifest-entry-name
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manifest-entry-version
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manifest-entry-output
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manifest-entry-item
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manifest-entry-dependencies
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manifest-entry-search-paths
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manifest-entry-parent
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manifest-pattern
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manifest-pattern?
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manifest-pattern-name
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manifest-pattern-version
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manifest-pattern-output
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manifest-remove
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manifest-add
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manifest-lookup
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manifest-installed?
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manifest-matching-entries
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manifest-transaction
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manifest-transaction?
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manifest-transaction-install
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manifest-transaction-remove
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manifest-transaction-install-entry
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manifest-transaction-remove-pattern
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manifest-transaction-null?
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manifest-transaction-removal-candidate?
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manifest-perform-transaction
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manifest-transaction-effects
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profile-manifest
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package->manifest-entry
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packages->manifest
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ca-certificate-bundle
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%default-profile-hooks
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profile-derivation
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generation-number
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generation-numbers
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profile-generations
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relative-generation-spec->number
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relative-generation
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previous-generation-number
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generation-time
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generation-file-name
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switch-to-generation
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roll-back
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delete-generation))
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;;; Commentary:
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;;;
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;;; Tools to create and manipulate profiles---i.e., the representation of a
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;;; set of installed packages.
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;;;
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;;; Code:
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;;;
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;;; Condition types.
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;;;
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(define-condition-type &profile-error &error
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profile-error?
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(profile profile-error-profile))
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(define-condition-type &profile-not-found-error &profile-error
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profile-not-found-error?)
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(define-condition-type &profile-collision-error &error
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profile-collision-error?
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(entry profile-collision-error-entry) ;<manifest-entry>
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(conflict profile-collision-error-conflict)) ;<manifest-entry>
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(define-condition-type &missing-generation-error &profile-error
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missing-generation-error?
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(generation missing-generation-error-generation))
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;;;
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;;; Manifests.
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;;;
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(define-record-type <manifest>
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(manifest entries)
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manifest?
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(entries manifest-entries)) ; list of <manifest-entry>
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;; Convenient alias, to avoid name clashes.
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(define make-manifest manifest)
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(define-record-type* <manifest-entry> manifest-entry
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make-manifest-entry
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manifest-entry?
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(name manifest-entry-name) ; string
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(version manifest-entry-version) ; string
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(output manifest-entry-output ; string
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(default "out"))
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(item manifest-entry-item) ; package | store path
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(dependencies manifest-entry-dependencies ; <manifest-entry>*
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(default '()))
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(search-paths manifest-entry-search-paths ; search-path-specification*
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(default '()))
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(parent manifest-entry-parent ; promise (#f | <manifest-entry>)
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(default (delay #f))))
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(define-record-type* <manifest-pattern> manifest-pattern
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make-manifest-pattern
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manifest-pattern?
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(name manifest-pattern-name) ; string
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(version manifest-pattern-version ; string | #f
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(default #f))
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(output manifest-pattern-output ; string | #f
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(default "out")))
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(define (manifest-transitive-entries manifest)
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"Return the entries of MANIFEST along with their propagated inputs,
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recursively."
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(let loop ((entries (manifest-entries manifest))
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(result '())
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(visited (set))) ;compare with 'equal?'
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(match entries
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(()
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(reverse result))
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((head . tail)
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(if (set-contains? visited head)
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(loop tail result visited)
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(loop (append (manifest-entry-dependencies head)
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tail)
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(cons head result)
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(set-insert head visited)))))))
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(define (profile-manifest profile)
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"Return the PROFILE's manifest."
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(let ((file (string-append profile "/manifest")))
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(if (file-exists? file)
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(call-with-input-file file read-manifest)
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(manifest '()))))
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(define (manifest-entry-lookup manifest)
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"Return a lookup procedure for the entries of MANIFEST. The lookup
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procedure takes two arguments: the entry name and output."
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(define mapping
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(let loop ((entries (manifest-entries manifest))
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(mapping vlist-null))
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(fold (lambda (entry result)
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(vhash-cons (cons (manifest-entry-name entry)
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(manifest-entry-output entry))
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entry
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(loop (manifest-entry-dependencies entry)
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result)))
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mapping
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entries)))
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(lambda (name output)
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(match (vhash-assoc (cons name output) mapping)
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((_ . entry) entry)
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(#f #f))))
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(define* (lower-manifest-entry entry system #:key target)
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"Lower ENTRY for SYSTEM and TARGET such that its 'item' field is a store
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file name."
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(let ((item (manifest-entry-item entry)))
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(if (string? item)
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(with-monad %store-monad
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(return entry))
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(mlet %store-monad ((drv (lower-object item system
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#:target target))
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(output -> (manifest-entry-output entry)))
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(return (manifest-entry
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(inherit entry)
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(item (derivation->output-path drv output))))))))
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(define* (check-for-collisions manifest system #:key target)
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"Check whether the entries of MANIFEST conflict with one another; raise a
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'&profile-collision-error' when a conflict is encountered."
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(define lookup
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(manifest-entry-lookup manifest))
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(with-monad %store-monad
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(foldm %store-monad
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(lambda (entry result)
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(match (lookup (manifest-entry-name entry)
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(manifest-entry-output entry))
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((? manifest-entry? second) ;potential conflict
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(mlet %store-monad ((first (lower-manifest-entry entry system
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#:target
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target))
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(second (lower-manifest-entry second system
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#:target
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target)))
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(if (string=? (manifest-entry-item first)
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(manifest-entry-item second))
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(return result)
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(raise (condition
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(&profile-collision-error
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(entry first)
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(conflict second)))))))
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(#f ;no conflict
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(return result))))
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#t
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(manifest-transitive-entries manifest))))
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(define* (package->manifest-entry package #:optional (output "out")
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#:key (parent (delay #f)))
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"Return a manifest entry for the OUTPUT of package PACKAGE."
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;; For each dependency, keep a promise pointing to its "parent" entry.
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(letrec* ((deps (map (match-lambda
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((label package)
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(package->manifest-entry package
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#:parent (delay entry)))
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((label package output)
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(package->manifest-entry package output
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#:parent (delay entry))))
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(package-propagated-inputs package)))
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(entry (manifest-entry
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(name (package-name package))
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(version (package-version package))
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(output output)
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(item package)
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(dependencies (delete-duplicates deps))
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(search-paths
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(package-transitive-native-search-paths package))
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(parent parent))))
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entry))
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(define (packages->manifest packages)
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"Return a list of manifest entries, one for each item listed in PACKAGES.
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Elements of PACKAGES can be either package objects or package/string tuples
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denoting a specific output of a package."
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(manifest
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(map (match-lambda
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((package output)
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(package->manifest-entry package output))
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((? package? package)
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(package->manifest-entry package)))
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packages)))
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(define (manifest->gexp manifest)
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"Return a representation of MANIFEST as a gexp."
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(define (entry->gexp entry)
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(match entry
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(($ <manifest-entry> name version output (? string? path)
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(deps ...) (search-paths ...))
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#~(#$name #$version #$output #$path
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(propagated-inputs #$(map entry->gexp deps))
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(search-paths #$(map search-path-specification->sexp
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search-paths))))
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(($ <manifest-entry> name version output (? package? package)
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(deps ...) (search-paths ...))
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#~(#$name #$version #$output
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(ungexp package (or output "out"))
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(propagated-inputs #$(map entry->gexp deps))
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(search-paths #$(map search-path-specification->sexp
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search-paths))))))
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(match manifest
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(($ <manifest> (entries ...))
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#~(manifest (version 3)
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(packages #$(map entry->gexp entries))))))
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(define (find-package name version)
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"Return a package from the distro matching NAME and possibly VERSION. This
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procedure is here for backward-compatibility and will eventually vanish."
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(define find-best-packages-by-name ;break abstractions
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(module-ref (resolve-interface '(gnu packages))
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'find-best-packages-by-name))
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;; Use 'find-best-packages-by-name' and not 'find-packages-by-name'; the
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;; former traverses the module tree only once and then allows for efficient
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;; access via a vhash.
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(match (find-best-packages-by-name name version)
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((p _ ...) p)
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(_
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(match (find-best-packages-by-name name #f)
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((p _ ...) p)
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(_ #f)))))
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(define (sexp->manifest sexp)
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"Parse SEXP as a manifest."
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(define (infer-search-paths name version)
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;; Infer the search path specifications for NAME-VERSION by looking up a
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;; same-named package in the distro. Useful for the old manifest formats
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;; that did not store search path info.
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(let ((package (find-package name version)))
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(if package
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(package-native-search-paths package)
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'())))
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(define (infer-dependency item parent)
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;; Return a <manifest-entry> for ITEM.
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(let-values (((name version)
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(package-name->name+version
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(store-path-package-name item))))
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(manifest-entry
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(name name)
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(version version)
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(item item)
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(parent parent))))
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(define* (sexp->manifest-entry sexp #:optional (parent (delay #f)))
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(match sexp
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((name version output path
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('propagated-inputs deps)
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('search-paths search-paths)
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extra-stuff ...)
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;; For each of DEPS, keep a promise pointing to ENTRY.
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(letrec* ((deps* (map (cut sexp->manifest-entry <> (delay entry))
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deps))
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(entry (manifest-entry
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(name name)
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(version version)
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(output output)
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(item path)
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(dependencies deps*)
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(search-paths (map sexp->search-path-specification
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search-paths))
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(parent parent))))
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entry))))
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(match sexp
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(('manifest ('version 0)
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('packages ((name version output path) ...)))
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(manifest
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(map (lambda (name version output path)
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(manifest-entry
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(name name)
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(version version)
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(output output)
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(item path)
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(search-paths (infer-search-paths name version))))
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name version output path)))
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;; Version 1 adds a list of propagated inputs to the
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;; name/version/output/path tuples.
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(('manifest ('version 1)
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('packages ((name version output path deps) ...)))
|
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(manifest
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(map (lambda (name version output path deps)
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;; Up to Guix 0.7 included, dependencies were listed as ("gmp"
|
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;; "/gnu/store/...-gmp") for instance. Discard the 'label' in
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;; such lists.
|
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(let ((deps (match deps
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(((labels directories) ...)
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directories)
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||
((directories ...)
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directories))))
|
||
(letrec* ((deps* (map (cute infer-dependency <> (delay entry))
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deps))
|
||
(entry (manifest-entry
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(name name)
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(version version)
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||
(output output)
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||
(item path)
|
||
(dependencies deps*)
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||
(search-paths
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||
(infer-search-paths name version)))))
|
||
entry)))
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name version output path deps)))
|
||
|
||
;; Version 2 adds search paths and is slightly more verbose.
|
||
(('manifest ('version 2 minor-version ...)
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||
('packages ((name version output path
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||
('propagated-inputs deps)
|
||
('search-paths search-paths)
|
||
extra-stuff ...)
|
||
...)))
|
||
(manifest
|
||
(map (lambda (name version output path deps search-paths)
|
||
(letrec* ((deps* (map (cute infer-dependency <> (delay entry))
|
||
deps))
|
||
(entry (manifest-entry
|
||
(name name)
|
||
(version version)
|
||
(output output)
|
||
(item path)
|
||
(dependencies deps*)
|
||
(search-paths
|
||
(map sexp->search-path-specification
|
||
search-paths)))))
|
||
entry))
|
||
name version output path deps search-paths)))
|
||
|
||
;; Version 3 represents DEPS as full-blown manifest entries.
|
||
(('manifest ('version 3 minor-version ...)
|
||
('packages (entries ...)))
|
||
(manifest (map sexp->manifest-entry entries)))
|
||
(_
|
||
(raise (condition
|
||
(&message (message "unsupported manifest format")))))))
|
||
|
||
(define (read-manifest port)
|
||
"Return the packages listed in MANIFEST."
|
||
(sexp->manifest (read port)))
|
||
|
||
(define (entry-predicate pattern)
|
||
"Return a procedure that returns #t when passed a manifest entry that
|
||
matches NAME/OUTPUT/VERSION. OUTPUT and VERSION may be #f, in which case they
|
||
are ignored."
|
||
(match pattern
|
||
(($ <manifest-pattern> name version output)
|
||
(match-lambda
|
||
(($ <manifest-entry> entry-name entry-version entry-output)
|
||
(and (string=? entry-name name)
|
||
(or (not entry-output) (not output)
|
||
(string=? entry-output output))
|
||
(or (not version)
|
||
(string=? entry-version version))))))))
|
||
|
||
(define (manifest-remove manifest patterns)
|
||
"Remove entries for each of PATTERNS from MANIFEST. Each item in PATTERNS
|
||
must be a manifest-pattern."
|
||
(define (remove-entry pattern lst)
|
||
(remove (entry-predicate pattern) lst))
|
||
|
||
(make-manifest (fold remove-entry
|
||
(manifest-entries manifest)
|
||
patterns)))
|
||
|
||
(define (manifest-add manifest entries)
|
||
"Add a list of manifest ENTRIES to MANIFEST and return new manifest.
|
||
Remove MANIFEST entries that have the same name and output as ENTRIES."
|
||
(define (same-entry? entry name output)
|
||
(match entry
|
||
(($ <manifest-entry> entry-name _ entry-output _ ...)
|
||
(and (equal? name entry-name)
|
||
(equal? output entry-output)))))
|
||
|
||
(make-manifest
|
||
(append entries
|
||
(fold (lambda (entry result)
|
||
(match entry
|
||
(($ <manifest-entry> name _ out _ ...)
|
||
(filter (negate (cut same-entry? <> name out))
|
||
result))))
|
||
(manifest-entries manifest)
|
||
entries))))
|
||
|
||
(define (manifest-lookup manifest pattern)
|
||
"Return the first item of MANIFEST that matches PATTERN, or #f if there is
|
||
no match.."
|
||
(find (entry-predicate pattern)
|
||
(manifest-entries manifest)))
|
||
|
||
(define (manifest-installed? manifest pattern)
|
||
"Return #t if MANIFEST has an entry matching PATTERN (a manifest-pattern),
|
||
#f otherwise."
|
||
(->bool (manifest-lookup manifest pattern)))
|
||
|
||
(define (manifest-matching-entries manifest patterns)
|
||
"Return all the entries of MANIFEST that match one of the PATTERNS."
|
||
(define predicates
|
||
(map entry-predicate patterns))
|
||
|
||
(define (matches? entry)
|
||
(any (lambda (pred)
|
||
(pred entry))
|
||
predicates))
|
||
|
||
(filter matches? (manifest-entries manifest)))
|
||
|
||
|
||
;;;
|
||
;;; Manifest transactions.
|
||
;;;
|
||
|
||
(define-record-type* <manifest-transaction> manifest-transaction
|
||
make-manifest-transaction
|
||
manifest-transaction?
|
||
(install manifest-transaction-install ; list of <manifest-entry>
|
||
(default '()))
|
||
(remove manifest-transaction-remove ; list of <manifest-pattern>
|
||
(default '())))
|
||
|
||
(define (manifest-transaction-install-entry entry transaction)
|
||
"Augment TRANSACTION's set of installed packages with ENTRY, a
|
||
<manifest-entry>."
|
||
(manifest-transaction
|
||
(inherit transaction)
|
||
(install
|
||
(cons entry (manifest-transaction-install transaction)))))
|
||
|
||
(define (manifest-transaction-remove-pattern pattern transaction)
|
||
"Add PATTERN to TRANSACTION's list of packages to remove."
|
||
(manifest-transaction
|
||
(inherit transaction)
|
||
(remove
|
||
(cons pattern (manifest-transaction-remove transaction)))))
|
||
|
||
(define (manifest-transaction-null? transaction)
|
||
"Return true if TRANSACTION has no effect---i.e., it neither installs nor
|
||
remove software."
|
||
(match transaction
|
||
(($ <manifest-transaction> () ()) #t)
|
||
(($ <manifest-transaction> _ _) #f)))
|
||
|
||
(define (manifest-transaction-removal-candidate? entry transaction)
|
||
"Return true if ENTRY is a candidate for removal in TRANSACTION."
|
||
(any (lambda (pattern)
|
||
((entry-predicate pattern) entry))
|
||
(manifest-transaction-remove transaction)))
|
||
|
||
(define (manifest-transaction-effects manifest transaction)
|
||
"Compute the effect of applying TRANSACTION to MANIFEST. Return 4 values:
|
||
the list of packages that would be removed, installed, upgraded, or downgraded
|
||
when applying TRANSACTION to MANIFEST. Upgrades are represented as pairs
|
||
where the head is the entry being upgraded and the tail is the entry that will
|
||
replace it."
|
||
(define (manifest-entry->pattern entry)
|
||
(manifest-pattern
|
||
(name (manifest-entry-name entry))
|
||
(output (manifest-entry-output entry))))
|
||
|
||
(let loop ((input (manifest-transaction-install transaction))
|
||
(install '())
|
||
(upgrade '())
|
||
(downgrade '()))
|
||
(match input
|
||
(()
|
||
(let ((remove (manifest-transaction-remove transaction)))
|
||
(values (manifest-matching-entries manifest remove)
|
||
(reverse install) (reverse upgrade) (reverse downgrade))))
|
||
((entry rest ...)
|
||
;; Check whether installing ENTRY corresponds to the installation of a
|
||
;; new package or to an upgrade.
|
||
|
||
;; XXX: When the exact same output directory is installed, we're not
|
||
;; really upgrading anything. Add a check for that case.
|
||
(let* ((pattern (manifest-entry->pattern entry))
|
||
(previous (manifest-lookup manifest pattern))
|
||
(newer? (and previous
|
||
(version>=? (manifest-entry-version entry)
|
||
(manifest-entry-version previous)))))
|
||
(loop rest
|
||
(if previous install (cons entry install))
|
||
(if (and previous newer?)
|
||
(alist-cons previous entry upgrade)
|
||
upgrade)
|
||
(if (and previous (not newer?))
|
||
(alist-cons previous entry downgrade)
|
||
downgrade)))))))
|
||
|
||
(define (manifest-perform-transaction manifest transaction)
|
||
"Perform TRANSACTION on MANIFEST and return the new manifest."
|
||
(let ((install (manifest-transaction-install transaction))
|
||
(remove (manifest-transaction-remove transaction)))
|
||
(manifest-add (manifest-remove manifest remove)
|
||
install)))
|
||
|
||
|
||
;;;
|
||
;;; Profiles.
|
||
;;;
|
||
|
||
(define (manifest-inputs manifest)
|
||
"Return a list of <gexp-input> objects for MANIFEST."
|
||
(define entry->input
|
||
(match-lambda
|
||
(($ <manifest-entry> name version output thing deps)
|
||
;; THING may be a package or a file name. In the latter case, assume
|
||
;; it's already valid.
|
||
(cons (gexp-input thing output)
|
||
(append-map entry->input deps)))))
|
||
|
||
(append-map entry->input (manifest-entries manifest)))
|
||
|
||
(define* (manifest-lookup-package manifest name #:optional version)
|
||
"Return as a monadic value the first package or store path referenced by
|
||
MANIFEST that is named NAME and optionally has the given VERSION prefix, or #f
|
||
if not found."
|
||
;; Return as a monadic value the package or store path referenced by the
|
||
;; manifest ENTRY, or #f if not referenced.
|
||
(define (entry-lookup-package entry)
|
||
(define (find-among-inputs inputs)
|
||
(find (lambda (input)
|
||
(and (package? input)
|
||
(equal? name (package-name input))
|
||
(if version
|
||
(string-prefix? version (package-version input))
|
||
#t)))
|
||
inputs))
|
||
(define (find-among-store-items items)
|
||
(find (lambda (item)
|
||
(let-values (((name* version*)
|
||
(package-name->name+version
|
||
(store-path-package-name item))))
|
||
(and (string=? name name*)
|
||
(if version
|
||
(string-prefix? version version*)
|
||
#t))))
|
||
items))
|
||
|
||
(with-monad %store-monad
|
||
(match (manifest-entry-item entry)
|
||
((? package? package)
|
||
(match (cons (list (package-name package) package)
|
||
(package-transitive-inputs package))
|
||
(((labels inputs . _) ...)
|
||
(return (find-among-inputs inputs)))))
|
||
((? string? item)
|
||
(mlet %store-monad ((refs (references* item)))
|
||
(return (find-among-store-items refs)))))))
|
||
|
||
(anym %store-monad
|
||
entry-lookup-package (manifest-entries manifest)))
|
||
|
||
(define (info-dir-file manifest)
|
||
"Return a derivation that builds the 'dir' file for all the entries of
|
||
MANIFEST."
|
||
(define texinfo ;lazy reference
|
||
(module-ref (resolve-interface '(gnu packages texinfo)) 'texinfo))
|
||
(define gzip ;lazy reference
|
||
(module-ref (resolve-interface '(gnu packages compression)) 'gzip))
|
||
|
||
(define build
|
||
(with-imported-modules '((guix build utils))
|
||
#~(begin
|
||
(use-modules (guix build utils)
|
||
(srfi srfi-1) (srfi srfi-26)
|
||
(ice-9 ftw))
|
||
|
||
(define (info-file? file)
|
||
(or (string-suffix? ".info" file)
|
||
(string-suffix? ".info.gz" file)))
|
||
|
||
(define (info-files top)
|
||
(let ((infodir (string-append top "/share/info")))
|
||
(map (cut string-append infodir "/" <>)
|
||
(or (scandir infodir info-file?) '()))))
|
||
|
||
(define (install-info info)
|
||
(setenv "PATH" (string-append #+gzip "/bin")) ;for info.gz files
|
||
(zero?
|
||
(system* (string-append #+texinfo "/bin/install-info") "--silent"
|
||
info (string-append #$output "/share/info/dir"))))
|
||
|
||
(mkdir-p (string-append #$output "/share/info"))
|
||
(exit (every install-info
|
||
(append-map info-files
|
||
'#$(manifest-inputs manifest)))))))
|
||
|
||
(gexp->derivation "info-dir" build
|
||
#:local-build? #t
|
||
#:substitutable? #f))
|
||
|
||
(define (ghc-package-cache-file manifest)
|
||
"Return a derivation that builds the GHC 'package.cache' file for all the
|
||
entries of MANIFEST, or #f if MANIFEST does not have any GHC packages."
|
||
(define ghc ;lazy reference
|
||
(module-ref (resolve-interface '(gnu packages haskell)) 'ghc))
|
||
|
||
(define build
|
||
(with-imported-modules '((guix build utils))
|
||
#~(begin
|
||
(use-modules (guix build utils)
|
||
(srfi srfi-1) (srfi srfi-26)
|
||
(ice-9 ftw))
|
||
|
||
(define ghc-name-version
|
||
(let* ((base (basename #+ghc)))
|
||
(string-drop base
|
||
(+ 1 (string-index base #\-)))))
|
||
|
||
(define db-subdir
|
||
(string-append "lib/" ghc-name-version "/package.conf.d"))
|
||
|
||
(define db-dir
|
||
(string-append #$output "/" db-subdir))
|
||
|
||
(define (conf-files top)
|
||
(let ((db (string-append top "/" db-subdir)))
|
||
(if (file-exists? db)
|
||
(find-files db "\\.conf$")
|
||
'())))
|
||
|
||
(define (copy-conf-file conf)
|
||
(let ((base (basename conf)))
|
||
(copy-file conf (string-append db-dir "/" base))))
|
||
|
||
(system* (string-append #+ghc "/bin/ghc-pkg") "init" db-dir)
|
||
(for-each copy-conf-file
|
||
(append-map conf-files
|
||
(delete-duplicates
|
||
'#$(manifest-inputs manifest))))
|
||
(let ((success
|
||
(zero?
|
||
(system* (string-append #+ghc "/bin/ghc-pkg") "recache"
|
||
(string-append "--package-db=" db-dir)))))
|
||
(for-each delete-file (find-files db-dir "\\.conf$"))
|
||
(exit success)))))
|
||
|
||
(with-monad %store-monad
|
||
;; Don't depend on GHC when there's nothing to do.
|
||
(if (any (cut string-prefix? "ghc" <>)
|
||
(map manifest-entry-name (manifest-entries manifest)))
|
||
(gexp->derivation "ghc-package-cache" build
|
||
#:local-build? #t
|
||
#:substitutable? #f)
|
||
(return #f))))
|
||
|
||
(define (ca-certificate-bundle manifest)
|
||
"Return a derivation that builds a single-file bundle containing the CA
|
||
certificates in the /etc/ssl/certs sub-directories of the packages in
|
||
MANIFEST. Single-file bundles are required by programs such as Git and Lynx."
|
||
;; See <http://lists.gnu.org/archive/html/guix-devel/2015-02/msg00429.html>
|
||
;; for a discussion.
|
||
|
||
(define glibc-utf8-locales ;lazy reference
|
||
(module-ref (resolve-interface '(gnu packages base)) 'glibc-utf8-locales))
|
||
|
||
(define build
|
||
(with-imported-modules '((guix build utils))
|
||
#~(begin
|
||
(use-modules (guix build utils)
|
||
(rnrs io ports)
|
||
(srfi srfi-1)
|
||
(srfi srfi-26)
|
||
(ice-9 ftw)
|
||
(ice-9 match))
|
||
|
||
(define (pem-file? file)
|
||
(string-suffix? ".pem" file))
|
||
|
||
(define (ca-files top)
|
||
(let ((cert-dir (string-append top "/etc/ssl/certs")))
|
||
(map (cut string-append cert-dir "/" <>)
|
||
(or (scandir cert-dir pem-file?) '()))))
|
||
|
||
(define (concatenate-files files result)
|
||
"Make RESULT the concatenation of all of FILES."
|
||
(define (dump file port)
|
||
(display (call-with-input-file file get-string-all)
|
||
port)
|
||
(newline port)) ;required, see <https://bugs.debian.org/635570>
|
||
|
||
(call-with-output-file result
|
||
(lambda (port)
|
||
(for-each (cut dump <> port) files))))
|
||
|
||
;; Some file names in the NSS certificates are UTF-8 encoded so
|
||
;; install a UTF-8 locale.
|
||
(setenv "LOCPATH"
|
||
(string-append #+glibc-utf8-locales "/lib/locale/"
|
||
#+(version-major+minor
|
||
(package-version glibc-utf8-locales))))
|
||
(setlocale LC_ALL "en_US.utf8")
|
||
|
||
(match (append-map ca-files '#$(manifest-inputs manifest))
|
||
(()
|
||
;; Since there are no CA files, just create an empty directory. Do
|
||
;; not create the etc/ssl/certs sub-directory, since that would
|
||
;; wrongfully lead to a message about 'SSL_CERT_DIR' needing to be
|
||
;; defined.
|
||
(mkdir #$output)
|
||
#t)
|
||
((ca-files ...)
|
||
(let ((result (string-append #$output "/etc/ssl/certs")))
|
||
(mkdir-p result)
|
||
(concatenate-files ca-files
|
||
(string-append result
|
||
"/ca-certificates.crt"))
|
||
#t))))))
|
||
|
||
(gexp->derivation "ca-certificate-bundle" build
|
||
#:local-build? #t
|
||
#:substitutable? #f))
|
||
|
||
(define (gtk-icon-themes manifest)
|
||
"Return a derivation that unions all icon themes from manifest entries and
|
||
creates the GTK+ 'icon-theme.cache' file for each theme."
|
||
(define gtk+ ; lazy reference
|
||
(module-ref (resolve-interface '(gnu packages gtk)) 'gtk+))
|
||
|
||
(mlet %store-monad ((%gtk+ (manifest-lookup-package manifest "gtk+"))
|
||
;; XXX: Can't use gtk-update-icon-cache corresponding
|
||
;; to the gtk+ referenced by 'manifest'. Because
|
||
;; '%gtk+' can be either a package or store path, and
|
||
;; there's no way to get the "bin" output for the later.
|
||
(gtk-update-icon-cache
|
||
-> #~(string-append #+gtk+:bin
|
||
"/bin/gtk-update-icon-cache")))
|
||
|
||
(define build
|
||
(with-imported-modules '((guix build utils)
|
||
(guix build union)
|
||
(guix build profiles)
|
||
(guix search-paths)
|
||
(guix records))
|
||
#~(begin
|
||
(use-modules (guix build utils)
|
||
(guix build union)
|
||
(guix build profiles)
|
||
(srfi srfi-26)
|
||
(ice-9 ftw))
|
||
|
||
(let* ((destdir (string-append #$output "/share/icons"))
|
||
(icondirs (filter file-exists?
|
||
(map (cut string-append <> "/share/icons")
|
||
'#$(manifest-inputs manifest)))))
|
||
|
||
;; Union all the icons.
|
||
(mkdir-p (string-append #$output "/share"))
|
||
(union-build destdir icondirs
|
||
#:log-port (%make-void-port "w"))
|
||
|
||
;; Update the 'icon-theme.cache' file for each icon theme.
|
||
(for-each
|
||
(lambda (theme)
|
||
(let ((dir (string-append destdir "/" theme)))
|
||
;; Occasionally DESTDIR contains plain files, such as
|
||
;; "abiword_48.png". Ignore these.
|
||
(when (file-is-directory? dir)
|
||
(ensure-writable-directory dir)
|
||
(system* #+gtk-update-icon-cache "-t" dir "--quiet"))))
|
||
(scandir destdir (negate (cut member <> '("." "..")))))))))
|
||
|
||
;; Don't run the hook when there's nothing to do.
|
||
(if %gtk+
|
||
(gexp->derivation "gtk-icon-themes" build
|
||
#:local-build? #t
|
||
#:substitutable? #f)
|
||
(return #f))))
|
||
|
||
(define (gtk-im-modules manifest)
|
||
"Return a derivation that builds the cache files for input method modules
|
||
for both major versions of GTK+."
|
||
|
||
(mlet %store-monad ((gtk+ (manifest-lookup-package manifest "gtk+" "3"))
|
||
(gtk+-2 (manifest-lookup-package manifest "gtk+" "2")))
|
||
|
||
(define (build gtk gtk-version query)
|
||
(let ((major (string-take gtk-version 1)))
|
||
(with-imported-modules '((guix build utils)
|
||
(guix build union)
|
||
(guix build profiles)
|
||
(guix search-paths)
|
||
(guix records))
|
||
#~(begin
|
||
(use-modules (guix build utils)
|
||
(guix build union)
|
||
(guix build profiles)
|
||
(ice-9 popen)
|
||
(srfi srfi-1)
|
||
(srfi srfi-26))
|
||
|
||
(let* ((prefix (string-append "/lib/gtk-" #$major ".0/"
|
||
#$gtk-version))
|
||
(destdir (string-append #$output prefix))
|
||
(moddirs (cons (string-append #$gtk prefix "/immodules")
|
||
(filter file-exists?
|
||
(map (cut string-append <> prefix "/immodules")
|
||
'#$(manifest-inputs manifest)))))
|
||
(modules (append-map (cut find-files <> "\\.so$")
|
||
moddirs)))
|
||
|
||
;; Generate a new immodules cache file.
|
||
(mkdir-p (string-append #$output prefix))
|
||
(let ((pipe (apply open-pipe* OPEN_READ #$query modules))
|
||
(outfile (string-append #$output prefix
|
||
"/immodules-gtk" #$major ".cache")))
|
||
(dynamic-wind
|
||
(const #t)
|
||
(lambda ()
|
||
(call-with-output-file outfile
|
||
(lambda (out)
|
||
(while (not (eof-object? (peek-char pipe)))
|
||
(write-char (read-char pipe) out))))
|
||
#t)
|
||
(lambda ()
|
||
(close-pipe pipe)))))))))
|
||
|
||
;; Don't run the hook when there's nothing to do.
|
||
(let* ((pkg-gtk+ (module-ref ; lazy reference
|
||
(resolve-interface '(gnu packages gtk)) 'gtk+))
|
||
(gexp #~(begin
|
||
#$(if gtk+
|
||
(build
|
||
gtk+ "3.0.0"
|
||
;; Use 'gtk-query-immodules-3.0' from the 'bin'
|
||
;; output of latest gtk+ package.
|
||
#~(string-append
|
||
#$pkg-gtk+:bin "/bin/gtk-query-immodules-3.0"))
|
||
#t)
|
||
#$(if gtk+-2
|
||
(build
|
||
gtk+-2 "2.10.0"
|
||
#~(string-append
|
||
#$gtk+-2 "/bin/gtk-query-immodules-2.0"))
|
||
#t))))
|
||
(if (or gtk+ gtk+-2)
|
||
(gexp->derivation "gtk-im-modules" gexp
|
||
#:local-build? #t
|
||
#:substitutable? #f)
|
||
(return #f)))))
|
||
|
||
(define (xdg-desktop-database manifest)
|
||
"Return a derivation that builds the @file{mimeinfo.cache} database from
|
||
desktop files. It's used to query what applications can handle a given
|
||
MIME type."
|
||
(define desktop-file-utils ; lazy reference
|
||
(module-ref (resolve-interface '(gnu packages freedesktop))
|
||
'desktop-file-utils))
|
||
|
||
(mlet %store-monad ((glib
|
||
(manifest-lookup-package
|
||
manifest "glib")))
|
||
(define build
|
||
(with-imported-modules '((guix build utils)
|
||
(guix build union))
|
||
#~(begin
|
||
(use-modules (srfi srfi-26)
|
||
(guix build utils)
|
||
(guix build union))
|
||
(let* ((destdir (string-append #$output "/share/applications"))
|
||
(appdirs (filter file-exists?
|
||
(map (cut string-append <>
|
||
"/share/applications")
|
||
'#$(manifest-inputs manifest))))
|
||
(update-desktop-database (string-append
|
||
#+desktop-file-utils
|
||
"/bin/update-desktop-database")))
|
||
(mkdir-p (string-append #$output "/share"))
|
||
(union-build destdir appdirs
|
||
#:log-port (%make-void-port "w"))
|
||
(exit (zero? (system* update-desktop-database destdir)))))))
|
||
|
||
;; Don't run the hook when 'glib' is not referenced.
|
||
(if glib
|
||
(gexp->derivation "xdg-desktop-database" build
|
||
#:local-build? #t
|
||
#:substitutable? #f)
|
||
(return #f))))
|
||
|
||
(define (xdg-mime-database manifest)
|
||
"Return a derivation that builds the @file{mime.cache} database from manifest
|
||
entries. It's used to query the MIME type of a given file."
|
||
(define shared-mime-info ; lazy reference
|
||
(module-ref (resolve-interface '(gnu packages gnome)) 'shared-mime-info))
|
||
|
||
(mlet %store-monad ((glib
|
||
(manifest-lookup-package
|
||
manifest "glib")))
|
||
(define build
|
||
(with-imported-modules '((guix build utils)
|
||
(guix build union))
|
||
#~(begin
|
||
(use-modules (srfi srfi-26)
|
||
(guix build utils)
|
||
(guix build union))
|
||
(let* ((datadir (string-append #$output "/share"))
|
||
(destdir (string-append datadir "/mime"))
|
||
(pkgdirs (filter file-exists?
|
||
(map (cut string-append <>
|
||
"/share/mime/packages")
|
||
(cons #+shared-mime-info
|
||
'#$(manifest-inputs manifest)))))
|
||
(update-mime-database (string-append
|
||
#+shared-mime-info
|
||
"/bin/update-mime-database")))
|
||
(mkdir-p destdir)
|
||
(union-build (string-append destdir "/packages") pkgdirs
|
||
#:log-port (%make-void-port "w"))
|
||
(setenv "XDG_DATA_HOME" datadir)
|
||
(exit (zero? (system* update-mime-database destdir)))))))
|
||
|
||
;; Don't run the hook when there are no GLib based applications.
|
||
(if glib
|
||
(gexp->derivation "xdg-mime-database" build
|
||
#:local-build? #t
|
||
#:substitutable? #f)
|
||
(return #f))))
|
||
|
||
;; Several font packages may install font files into same directory, so
|
||
;; fonts.dir and fonts.scale file should be generated here, instead of in
|
||
;; packages.
|
||
(define (fonts-dir-file manifest)
|
||
"Return a derivation that builds the @file{fonts.dir} and @file{fonts.scale}
|
||
files for the fonts of the @var{manifest} entries."
|
||
(define mkfontscale
|
||
(module-ref (resolve-interface '(gnu packages xorg)) 'mkfontscale))
|
||
|
||
(define mkfontdir
|
||
(module-ref (resolve-interface '(gnu packages xorg)) 'mkfontdir))
|
||
|
||
(define build
|
||
#~(begin
|
||
(use-modules (srfi srfi-26)
|
||
(guix build utils)
|
||
(guix build union))
|
||
(let ((fonts-dirs (filter file-exists?
|
||
(map (cut string-append <>
|
||
"/share/fonts")
|
||
'#$(manifest-inputs manifest)))))
|
||
(mkdir #$output)
|
||
(if (null? fonts-dirs)
|
||
(exit #t)
|
||
(let* ((share-dir (string-append #$output "/share"))
|
||
(fonts-dir (string-append share-dir "/fonts"))
|
||
(mkfontscale (string-append #+mkfontscale
|
||
"/bin/mkfontscale"))
|
||
(mkfontdir (string-append #+mkfontdir
|
||
"/bin/mkfontdir"))
|
||
(empty-file? (lambda (filename)
|
||
(call-with-ascii-input-file filename
|
||
(lambda (p)
|
||
(eqv? #\0 (read-char p))))))
|
||
(fonts-dir-file "fonts.dir")
|
||
(fonts-scale-file "fonts.scale"))
|
||
(mkdir-p share-dir)
|
||
;; Create all sub-directories, because we may create fonts.dir
|
||
;; and fonts.scale files in the sub-directories.
|
||
(union-build fonts-dir fonts-dirs
|
||
#:log-port (%make-void-port "w")
|
||
#:create-all-directories? #t)
|
||
(let ((directories (find-files fonts-dir
|
||
(lambda (file stat)
|
||
(eq? 'directory (stat:type stat)))
|
||
#:directories? #t)))
|
||
(for-each (lambda (dir)
|
||
(with-directory-excursion dir
|
||
(when (file-exists? fonts-scale-file)
|
||
(delete-file fonts-scale-file))
|
||
(when (file-exists? fonts-dir-file)
|
||
(delete-file fonts-dir-file))
|
||
(unless (and (zero? (system* mkfontscale))
|
||
(zero? (system* mkfontdir)))
|
||
(exit #f))
|
||
(when (and (file-exists? fonts-scale-file)
|
||
(empty-file? fonts-scale-file))
|
||
(delete-file fonts-scale-file))
|
||
(when (and (file-exists? fonts-dir-file)
|
||
(empty-file? fonts-dir-file))
|
||
(delete-file fonts-dir-file))))
|
||
directories)))))))
|
||
|
||
(gexp->derivation "fonts-dir" build
|
||
#:modules '((guix build utils)
|
||
(guix build union)
|
||
(srfi srfi-26))
|
||
#:local-build? #t
|
||
#:substitutable? #f))
|
||
|
||
(define (manual-database manifest)
|
||
"Return a derivation that builds the manual page database (\"mandb\") for
|
||
the entries in MANIFEST."
|
||
(define man-db ;lazy reference
|
||
(module-ref (resolve-interface '(gnu packages man)) 'man-db))
|
||
|
||
(define build
|
||
(with-imported-modules '((guix build utils))
|
||
#~(begin
|
||
(use-modules (guix build utils)
|
||
(srfi srfi-1)
|
||
(srfi srfi-19)
|
||
(srfi srfi-26))
|
||
|
||
(define entries
|
||
(filter-map (lambda (directory)
|
||
(let ((man (string-append directory "/share/man")))
|
||
(and (directory-exists? man)
|
||
man)))
|
||
'#$(manifest-inputs manifest)))
|
||
|
||
(define manpages-collection-dir
|
||
(string-append (getenv "PWD") "/manpages-collection"))
|
||
|
||
(define man-directory
|
||
(string-append #$output "/share/man"))
|
||
|
||
(define (get-manpage-tail-path manpage-path)
|
||
(let ((index (string-contains manpage-path "/share/man/")))
|
||
(unless index
|
||
(error "Manual path doesn't contain \"/share/man/\":"
|
||
manpage-path))
|
||
(string-drop manpage-path (+ index (string-length "/share/man/")))))
|
||
|
||
(define (populate-manpages-collection-dir entries)
|
||
(let ((manpages (append-map (cut find-files <> #:stat stat) entries)))
|
||
(for-each (lambda (manpage)
|
||
(let* ((dest-file (string-append
|
||
manpages-collection-dir "/"
|
||
(get-manpage-tail-path manpage))))
|
||
(mkdir-p (dirname dest-file))
|
||
(catch 'system-error
|
||
(lambda ()
|
||
(symlink manpage dest-file))
|
||
(lambda args
|
||
;; Different packages may contain the same
|
||
;; manpage. Simply ignore the symlink error.
|
||
#t))))
|
||
manpages)))
|
||
|
||
(mkdir-p manpages-collection-dir)
|
||
(populate-manpages-collection-dir entries)
|
||
|
||
;; Create a mandb config file which contains a custom made
|
||
;; manpath. The associated catpath is the location where the database
|
||
;; gets generated.
|
||
(copy-file #+(file-append man-db "/etc/man_db.conf")
|
||
"man_db.conf")
|
||
(substitute* "man_db.conf"
|
||
(("MANDB_MAP /usr/man /var/cache/man/fsstnd")
|
||
(string-append "MANDB_MAP " manpages-collection-dir " "
|
||
man-directory)))
|
||
|
||
(mkdir-p man-directory)
|
||
(setenv "MANPATH" (string-join entries ":"))
|
||
|
||
(format #t "Creating manual page database for ~a packages... "
|
||
(length entries))
|
||
(force-output)
|
||
(let* ((start-time (current-time))
|
||
(exit-status (system* #+(file-append man-db "/bin/mandb")
|
||
"--quiet" "--create"
|
||
"-C" "man_db.conf"))
|
||
(duration (time-difference (current-time) start-time)))
|
||
(format #t "done in ~,3f s~%"
|
||
(+ (time-second duration)
|
||
(* (time-nanosecond duration) (expt 10 -9))))
|
||
(force-output)
|
||
(zero? exit-status)))))
|
||
|
||
(gexp->derivation "manual-database" build
|
||
#:local-build? #t))
|
||
|
||
(define %default-profile-hooks
|
||
;; This is the list of derivation-returning procedures that are called by
|
||
;; default when making a non-empty profile.
|
||
(list info-dir-file
|
||
manual-database
|
||
fonts-dir-file
|
||
ghc-package-cache-file
|
||
ca-certificate-bundle
|
||
gtk-icon-themes
|
||
gtk-im-modules
|
||
xdg-desktop-database
|
||
xdg-mime-database))
|
||
|
||
(define* (profile-derivation manifest
|
||
#:key
|
||
(hooks %default-profile-hooks)
|
||
(locales? #t)
|
||
(allow-collisions? #f)
|
||
system target)
|
||
"Return a derivation that builds a profile (aka. 'user environment') with
|
||
the given MANIFEST. The profile includes additional derivations returned by
|
||
the monadic procedures listed in HOOKS--such as an Info 'dir' file, etc.
|
||
Unless ALLOW-COLLISIONS? is true, a '&profile-collision-error' is raised if
|
||
entries in MANIFEST collide (for instance if there are two same-name packages
|
||
with a different version number.)
|
||
|
||
When LOCALES? is true, the build is performed under a UTF-8 locale; this adds
|
||
a dependency on the 'glibc-utf8-locales' package.
|
||
|
||
When TARGET is true, it must be a GNU triplet, and the packages in MANIFEST
|
||
are cross-built for TARGET."
|
||
(mlet* %store-monad ((system (if system
|
||
(return system)
|
||
(current-system)))
|
||
(ok? (if allow-collisions?
|
||
(return #t)
|
||
(check-for-collisions manifest system
|
||
#:target target)))
|
||
(extras (if (null? (manifest-entries manifest))
|
||
(return '())
|
||
(sequence %store-monad
|
||
(map (lambda (hook)
|
||
(hook manifest))
|
||
hooks)))))
|
||
(define inputs
|
||
(append (filter-map (lambda (drv)
|
||
(and (derivation? drv)
|
||
(gexp-input drv)))
|
||
extras)
|
||
(manifest-inputs manifest)))
|
||
|
||
(define glibc-utf8-locales ;lazy reference
|
||
(module-ref (resolve-interface '(gnu packages base))
|
||
'glibc-utf8-locales))
|
||
|
||
(define set-utf8-locale
|
||
;; Some file names (e.g., in 'nss-certs') are UTF-8 encoded so
|
||
;; install a UTF-8 locale.
|
||
#~(begin
|
||
(setenv "LOCPATH"
|
||
#$(file-append glibc-utf8-locales "/lib/locale/"
|
||
(version-major+minor
|
||
(package-version glibc-utf8-locales))))
|
||
(setlocale LC_ALL "en_US.utf8")))
|
||
|
||
(define builder
|
||
(with-imported-modules '((guix build profiles)
|
||
(guix build union)
|
||
(guix build utils)
|
||
(guix search-paths)
|
||
(guix records))
|
||
#~(begin
|
||
(use-modules (guix build profiles)
|
||
(guix search-paths)
|
||
(srfi srfi-1))
|
||
|
||
(setvbuf (current-output-port) _IOLBF)
|
||
(setvbuf (current-error-port) _IOLBF)
|
||
|
||
#+(if locales? set-utf8-locale #t)
|
||
|
||
(define search-paths
|
||
;; Search paths of MANIFEST's packages, converted back to their
|
||
;; record form.
|
||
(map sexp->search-path-specification
|
||
(delete-duplicates
|
||
'#$(map search-path-specification->sexp
|
||
(append-map manifest-entry-search-paths
|
||
(manifest-entries manifest))))))
|
||
|
||
(build-profile #$output '#$inputs
|
||
#:manifest '#$(manifest->gexp manifest)
|
||
#:search-paths search-paths))))
|
||
|
||
(gexp->derivation "profile" builder
|
||
#:system system
|
||
#:target target
|
||
|
||
;; Don't complain about _IO* on Guile 2.2.
|
||
#:env-vars '(("GUILE_WARN_DEPRECATED" . "no"))
|
||
|
||
;; Not worth offloading.
|
||
#:local-build? #t
|
||
|
||
;; Disable substitution because it would trigger a
|
||
;; connection to the substitute server, which is likely
|
||
;; to have no substitute to offer.
|
||
#:substitutable? #f)))
|
||
|
||
(define (profile-regexp profile)
|
||
"Return a regular expression that matches PROFILE's name and number."
|
||
(make-regexp (string-append "^" (regexp-quote (basename profile))
|
||
"-([0-9]+)")))
|
||
|
||
(define (generation-number profile)
|
||
"Return PROFILE's number or 0. An absolute file name must be used."
|
||
(or (and=> (false-if-exception (regexp-exec (profile-regexp profile)
|
||
(basename (readlink profile))))
|
||
(compose string->number (cut match:substring <> 1)))
|
||
0))
|
||
|
||
(define (generation-numbers profile)
|
||
"Return the sorted list of generation numbers of PROFILE, or '(0) if no
|
||
former profiles were found."
|
||
(match (scandir (dirname profile)
|
||
(cute regexp-exec (profile-regexp profile) <>))
|
||
(#f ; no profile directory
|
||
'(0))
|
||
(() ; no profiles
|
||
'(0))
|
||
((profiles ...) ; former profiles around
|
||
(sort (map (compose string->number
|
||
(cut match:substring <> 1)
|
||
(cute regexp-exec (profile-regexp profile) <>))
|
||
profiles)
|
||
<))))
|
||
|
||
(define (profile-generations profile)
|
||
"Return a list of PROFILE's generations."
|
||
(let ((generations (generation-numbers profile)))
|
||
(if (equal? generations '(0))
|
||
'()
|
||
generations)))
|
||
|
||
(define (relative-generation-spec->number profile spec)
|
||
"Return PROFILE's generation specified by SPEC, which is a string. The SPEC
|
||
may be a N, -N, or +N, where N is a number. If the spec is N, then the number
|
||
returned is N. If it is -N, then the number returned is the profile's current
|
||
generation number minus N. If it is +N, then the number returned is the
|
||
profile's current generation number plus N. Return #f if there is no such
|
||
generation."
|
||
(let ((number (string->number spec)))
|
||
(and number
|
||
(case (string-ref spec 0)
|
||
((#\+ #\-)
|
||
(relative-generation profile number))
|
||
(else (if (memv number (profile-generations profile))
|
||
number
|
||
#f))))))
|
||
|
||
|
||
(define* (relative-generation profile shift #:optional
|
||
(current (generation-number profile)))
|
||
"Return PROFILE's generation shifted from the CURRENT generation by SHIFT.
|
||
SHIFT is a positive or negative number.
|
||
Return #f if there is no such generation."
|
||
(let* ((abs-shift (abs shift))
|
||
(numbers (profile-generations profile))
|
||
(from-current (memq current
|
||
(if (negative? shift)
|
||
(reverse numbers)
|
||
numbers))))
|
||
(and from-current
|
||
(< abs-shift (length from-current))
|
||
(list-ref from-current abs-shift))))
|
||
|
||
(define* (previous-generation-number profile #:optional
|
||
(number (generation-number profile)))
|
||
"Return the number of the generation before generation NUMBER of
|
||
PROFILE, or 0 if none exists. It could be NUMBER - 1, but it's not the
|
||
case when generations have been deleted (there are \"holes\")."
|
||
(or (relative-generation profile -1 number)
|
||
0))
|
||
|
||
(define (generation-file-name profile generation)
|
||
"Return the file name for PROFILE's GENERATION."
|
||
(format #f "~a-~a-link" profile generation))
|
||
|
||
(define (generation-time profile number)
|
||
"Return the creation time of a generation in the UTC format."
|
||
(make-time time-utc 0
|
||
(stat:ctime (stat (generation-file-name profile number)))))
|
||
|
||
(define (link-to-empty-profile store generation)
|
||
"Link GENERATION, a string, to the empty profile. An error is raised if
|
||
that fails."
|
||
(let* ((drv (run-with-store store
|
||
(profile-derivation (manifest '())
|
||
#:locales? #f)))
|
||
(prof (derivation->output-path drv "out")))
|
||
(build-derivations store (list drv))
|
||
(switch-symlinks generation prof)))
|
||
|
||
(define (switch-to-generation profile number)
|
||
"Atomically switch PROFILE to the generation NUMBER. Return the number of
|
||
the generation that was current before switching."
|
||
(let ((current (generation-number profile))
|
||
(generation (generation-file-name profile number)))
|
||
(cond ((not (file-exists? profile))
|
||
(raise (condition (&profile-not-found-error
|
||
(profile profile)))))
|
||
((not (file-exists? generation))
|
||
(raise (condition (&missing-generation-error
|
||
(profile profile)
|
||
(generation number)))))
|
||
(else
|
||
(switch-symlinks profile generation)
|
||
current))))
|
||
|
||
(define (switch-to-previous-generation profile)
|
||
"Atomically switch PROFILE to the previous generation. Return the former
|
||
generation number and the current one."
|
||
(let ((previous (previous-generation-number profile)))
|
||
(values (switch-to-generation profile previous)
|
||
previous)))
|
||
|
||
(define (roll-back store profile)
|
||
"Roll back to the previous generation of PROFILE. Return the number of the
|
||
generation that was current before switching and the new generation number."
|
||
(let* ((number (generation-number profile))
|
||
(previous-number (previous-generation-number profile number))
|
||
(previous-generation (generation-file-name profile previous-number)))
|
||
(cond ((not (file-exists? profile)) ;invalid profile
|
||
(raise (condition (&profile-not-found-error
|
||
(profile profile)))))
|
||
((zero? number) ;empty profile
|
||
(values number number))
|
||
((or (zero? previous-number) ;going to emptiness
|
||
(not (file-exists? previous-generation)))
|
||
(link-to-empty-profile store previous-generation)
|
||
(switch-to-previous-generation profile))
|
||
(else ;anything else
|
||
(switch-to-previous-generation profile)))))
|
||
|
||
(define (delete-generation store profile number)
|
||
"Delete generation with NUMBER from PROFILE. Return the file name of the
|
||
generation that has been deleted, or #f if nothing was done (for instance
|
||
because the NUMBER is zero.)"
|
||
(define (delete-and-return)
|
||
(let ((generation (generation-file-name profile number)))
|
||
(delete-file generation)
|
||
generation))
|
||
|
||
(let* ((current-number (generation-number profile))
|
||
(previous-number (previous-generation-number profile number))
|
||
(previous-generation (generation-file-name profile previous-number)))
|
||
(cond ((zero? number) #f) ;do not delete generation 0
|
||
((and (= number current-number)
|
||
(not (file-exists? previous-generation)))
|
||
(link-to-empty-profile store previous-generation)
|
||
(switch-to-previous-generation profile)
|
||
(delete-and-return))
|
||
((= number current-number)
|
||
(roll-back store profile)
|
||
(delete-and-return))
|
||
(else
|
||
(delete-and-return)))))
|
||
|
||
;;; profiles.scm ends here
|