462f5ccade
Suggested by Alex Kost <alezost@gmail.com>.
* guix/scripts/package.scm (options->installable)[package->manifest-entry]:
Move to (guix profiles).
[package->manifest-entry*]: New procedure.
Use it.
* guix/profiles.scm (package->manifest-entry): New procedure.
* tests/profiles.scm (guile-for-build): New variable.
Call '%guile-for-build'.
("profile-derivation"): New test.
336 lines
11 KiB
Scheme
336 lines
11 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org>
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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)
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#:use-module (guix records)
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#:use-module (guix derivations)
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#:use-module (guix packages)
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#:use-module (guix gexp)
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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 (srfi srfi-1)
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#:use-module (srfi srfi-9)
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#:use-module (srfi srfi-19)
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#:use-module (srfi srfi-26)
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#:export (manifest make-manifest
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manifest?
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manifest-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-pattern
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manifest-pattern?
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manifest-remove
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manifest-installed?
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manifest-matching-entries
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profile-manifest
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package->manifest-entry
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profile-derivation
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generation-number
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generation-numbers
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previous-generation-number
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generation-time
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generation-file-name))
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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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;;; 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 ; (store path | package)*
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(default '())))
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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 (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* (package->manifest-entry package #:optional output)
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"Return a manifest entry for the OUTPUT of package PACKAGE. When OUTPUT is
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omitted or #f, use the first output of PACKAGE."
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(let ((deps (map (match-lambda
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((label package)
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`(,package "out"))
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((label package output)
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`(,package ,output)))
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(package-transitive-propagated-inputs package))))
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(manifest-entry
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(name (package-name package))
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(version (package-version package))
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(output (or output (car (package-outputs package))))
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(item package)
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(dependencies (delete-duplicates deps)))))
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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) (deps ...))
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#~(#$name #$version #$output #$path #$deps))
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(($ <manifest-entry> name version output (? package? package) (deps ...))
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#~(#$name #$version #$output
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(ungexp package (or output "out")) #$deps))))
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(match manifest
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(($ <manifest> (entries ...))
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#~(manifest (version 1)
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(packages #$(map entry->gexp entries))))))
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(define (sexp->manifest sexp)
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"Parse SEXP as a manifest."
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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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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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(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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name version output path deps)))
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(_
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(error "unsupported manifest format" manifest))))
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(define (read-manifest port)
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"Return the packages listed in MANIFEST."
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(sexp->manifest (read port)))
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(define (entry-predicate pattern)
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"Return a procedure that returns #t when passed a manifest entry that
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matches NAME/OUTPUT/VERSION. OUTPUT and VERSION may be #f, in which case they
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are ignored."
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(match pattern
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(($ <manifest-pattern> name version output)
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(match-lambda
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(($ <manifest-entry> entry-name entry-version entry-output)
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(and (string=? entry-name name)
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(or (not entry-output) (not output)
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(string=? entry-output output))
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(or (not version)
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(string=? entry-version version))))))))
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(define (manifest-remove manifest patterns)
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"Remove entries for each of PATTERNS from MANIFEST. Each item in PATTERNS
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must be a manifest-pattern."
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(define (remove-entry pattern lst)
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(remove (entry-predicate pattern) lst))
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(make-manifest (fold remove-entry
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(manifest-entries manifest)
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patterns)))
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(define (manifest-installed? manifest pattern)
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"Return #t if MANIFEST has an entry matching PATTERN (a manifest-pattern),
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#f otherwise."
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(->bool (find (entry-predicate pattern)
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(manifest-entries manifest))))
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(define (manifest-matching-entries manifest patterns)
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"Return all the entries of MANIFEST that match one of the PATTERNS."
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(define predicates
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(map entry-predicate patterns))
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(define (matches? entry)
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(any (lambda (pred)
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(pred entry))
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predicates))
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(filter matches? (manifest-entries manifest)))
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;;;
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;;; Profiles.
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;;;
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(define (profile-derivation manifest)
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"Return a derivation that builds a profile (aka. 'user environment') with
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the given MANIFEST."
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(define inputs
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(append-map (match-lambda
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(($ <manifest-entry> name version
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output (? package? package) deps)
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`((,package ,output) ,@deps))
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(($ <manifest-entry> name version output path deps)
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;; Assume PATH and DEPS are already valid.
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`(,path ,@deps)))
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(manifest-entries manifest)))
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(define builder
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#~(begin
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(use-modules (ice-9 pretty-print)
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(guix build union))
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(setvbuf (current-output-port) _IOLBF)
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(setvbuf (current-error-port) _IOLBF)
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(union-build #$output '#$inputs
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#:log-port (%make-void-port "w"))
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(call-with-output-file (string-append #$output "/manifest")
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(lambda (p)
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(pretty-print '#$(manifest->gexp manifest) p)))))
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(gexp->derivation "profile" builder
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#:modules '((guix build union))
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#:local-build? #t))
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(define (profile-regexp profile)
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"Return a regular expression that matches PROFILE's name and number."
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(make-regexp (string-append "^" (regexp-quote (basename profile))
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"-([0-9]+)")))
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(define (generation-number profile)
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"Return PROFILE's number or 0. An absolute file name must be used."
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(or (and=> (false-if-exception (regexp-exec (profile-regexp profile)
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(basename (readlink profile))))
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(compose string->number (cut match:substring <> 1)))
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0))
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(define (generation-numbers profile)
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"Return the sorted list of generation numbers of PROFILE, or '(0) if no
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former profiles were found."
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(define* (scandir name #:optional (select? (const #t))
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(entry<? (@ (ice-9 i18n) string-locale<?)))
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;; XXX: Bug-fix version introduced in Guile v2.0.6-62-g139ce19.
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(define (enter? dir stat result)
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(and stat (string=? dir name)))
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(define (visit basename result)
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(if (select? basename)
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(cons basename result)
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result))
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(define (leaf name stat result)
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(and result
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(visit (basename name) result)))
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(define (down name stat result)
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(visit "." '()))
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(define (up name stat result)
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(visit ".." result))
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(define (skip name stat result)
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;; All the sub-directories are skipped.
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(visit (basename name) result))
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(define (error name* stat errno result)
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(if (string=? name name*) ; top-level NAME is unreadable
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result
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(visit (basename name*) result)))
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(and=> (file-system-fold enter? leaf down up skip error #f name lstat)
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(lambda (files)
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(sort files entry<?))))
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(match (scandir (dirname profile)
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(cute regexp-exec (profile-regexp profile) <>))
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(#f ; no profile directory
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'(0))
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(() ; no profiles
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'(0))
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((profiles ...) ; former profiles around
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(sort (map (compose string->number
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(cut match:substring <> 1)
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(cute regexp-exec (profile-regexp profile) <>))
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profiles)
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<))))
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(define (previous-generation-number profile number)
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"Return the number of the generation before generation NUMBER of
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PROFILE, or 0 if none exists. It could be NUMBER - 1, but it's not the
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case when generations have been deleted (there are \"holes\")."
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(fold (lambda (candidate highest)
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(if (and (< candidate number) (> candidate highest))
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candidate
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highest))
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0
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(generation-numbers profile)))
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(define (generation-file-name profile generation)
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"Return the file name for PROFILE's GENERATION."
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(format #f "~a-~a-link" profile generation))
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(define (generation-time profile number)
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"Return the creation time of a generation in the UTC format."
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(make-time time-utc 0
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(stat:ctime (stat (generation-file-name profile number)))))
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;;; profiles.scm ends here
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