163 lines
6.6 KiB
Scheme
163 lines
6.6 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
|
;;; Copyright © 2018, 2019 Ludovic Courtès <ludo@gnu.org>
|
|
;;;
|
|
;;; This file is part of GNU Guix.
|
|
;;;
|
|
;;; GNU Guix is free software; you can redistribute it and/or modify it
|
|
;;; under the terms of the GNU General Public License as published by
|
|
;;; the Free Software Foundation; either version 3 of the License, or (at
|
|
;;; your option) any later version.
|
|
;;;
|
|
;;; GNU Guix is distributed in the hope that it will be useful, but
|
|
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
;;; GNU General Public License for more details.
|
|
;;;
|
|
;;; You should have received a copy of the GNU General Public License
|
|
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
(define-module (guix describe)
|
|
#:use-module (guix memoization)
|
|
#:use-module (guix profiles)
|
|
#:use-module (guix packages)
|
|
#:use-module ((guix utils) #:select (location-file))
|
|
#:use-module ((guix store) #:select (%store-prefix store-path?))
|
|
#:use-module ((guix config) #:select (%state-directory))
|
|
#:use-module (srfi srfi-1)
|
|
#:use-module (ice-9 match)
|
|
#:export (current-profile
|
|
current-profile-date
|
|
current-profile-entries
|
|
package-path-entries
|
|
|
|
package-provenance
|
|
manifest-entry-with-provenance))
|
|
|
|
;;; Commentary:
|
|
;;;
|
|
;;; This module provides supporting code to allow a Guix instance to find, at
|
|
;;; run time, which profile it's in (profiles created by 'guix pull'). That
|
|
;;; allows it to read meta-information about itself (e.g., repository URL and
|
|
;;; commit ID) and to find other channels available in the same profile. It's
|
|
;;; a bit like ELPA's pkg-info.el.
|
|
;;;
|
|
;;; Code:
|
|
|
|
(define current-profile
|
|
(mlambda ()
|
|
"Return the profile (created by 'guix pull') the calling process lives in,
|
|
or #f if this is not applicable."
|
|
(match (command-line)
|
|
((program . _)
|
|
(and (string-suffix? "/bin/guix" program)
|
|
;; Note: We want to do _lexical dot-dot resolution_. Using ".."
|
|
;; for real would instead take us into the /gnu/store directory
|
|
;; that ~/.config/guix/current/bin points to, whereas we want to
|
|
;; obtain ~/.config/guix/current.
|
|
(let ((candidate (dirname (dirname program))))
|
|
(and (file-exists? (string-append candidate "/manifest"))
|
|
candidate)))))))
|
|
|
|
(define (current-profile-date)
|
|
"Return the creation date of the current profile (produced by 'guix pull'),
|
|
as a number of seconds since the Epoch, or #f if it could not be determined."
|
|
;; Normally 'current-profile' will return ~/.config/guix/current. We need
|
|
;; to 'readlink' once to get '/var/guix/…/guix-profile', whose mtime is the
|
|
;; piece of information we're looking for.
|
|
(let loop ((profile (current-profile)))
|
|
(match profile
|
|
(#f #f)
|
|
((? store-path?) #f)
|
|
(file
|
|
(if (string-prefix? %state-directory file)
|
|
(and=> (lstat file) stat:mtime)
|
|
(catch 'system-error
|
|
(lambda ()
|
|
(let ((target (readlink file)))
|
|
(loop (if (string-prefix? "/" target)
|
|
target
|
|
(string-append (dirname file) "/" target)))))
|
|
(const #f)))))))
|
|
|
|
(define current-profile-entries
|
|
(mlambda ()
|
|
"Return the list of entries in the 'guix pull' profile the calling process
|
|
lives in, or #f if this is not applicable."
|
|
(match (current-profile)
|
|
(#f '())
|
|
(profile
|
|
(let ((manifest (profile-manifest profile)))
|
|
(manifest-entries manifest))))))
|
|
|
|
(define current-channel-entries
|
|
(mlambda ()
|
|
"Return manifest entries corresponding to extra channels--i.e., not the
|
|
'guix' channel."
|
|
(remove (lambda (entry)
|
|
(string=? (manifest-entry-name entry) "guix"))
|
|
(current-profile-entries))))
|
|
|
|
(define (package-path-entries)
|
|
"Return two values: the list of package path entries to be added to the
|
|
package search path, and the list to be added to %LOAD-COMPILED-PATH. These
|
|
entries are taken from the 'guix pull' profile the calling process lives in,
|
|
when applicable."
|
|
;; Filter out Guix itself.
|
|
(unzip2 (map (lambda (entry)
|
|
(list (string-append (manifest-entry-item entry)
|
|
"/share/guile/site/"
|
|
(effective-version))
|
|
(string-append (manifest-entry-item entry)
|
|
"/lib/guile/" (effective-version)
|
|
"/site-ccache")))
|
|
(current-channel-entries))))
|
|
|
|
(define (package-provenance package)
|
|
"Return the provenance of PACKAGE as an sexp for use as the 'provenance'
|
|
property of manifest entries, or #f if it could not be determined."
|
|
(define (entry-source entry)
|
|
(match (assq 'source
|
|
(manifest-entry-properties entry))
|
|
(('source value) value)
|
|
(_ #f)))
|
|
|
|
(match (and=> (package-location package) location-file)
|
|
(#f #f)
|
|
(file
|
|
(let ((file (if (string-prefix? "/" file)
|
|
file
|
|
(search-path %load-path file))))
|
|
(and file
|
|
(string-prefix? (%store-prefix) file)
|
|
|
|
;; Always store information about the 'guix' channel and
|
|
;; optionally about the specific channel FILE comes from.
|
|
(or (let ((main (and=> (find (lambda (entry)
|
|
(string=? "guix"
|
|
(manifest-entry-name entry)))
|
|
(current-profile-entries))
|
|
entry-source))
|
|
(extra (any (lambda (entry)
|
|
(let ((item (manifest-entry-item entry)))
|
|
(and (string-prefix? item file)
|
|
(entry-source entry))))
|
|
(current-profile-entries))))
|
|
(and main
|
|
`(,main
|
|
,@(if extra (list extra) '()))))))))))
|
|
|
|
(define (manifest-entry-with-provenance entry)
|
|
"Return ENTRY with an additional 'provenance' property if it's not already
|
|
there."
|
|
(let ((properties (manifest-entry-properties entry)))
|
|
(if (assq 'properties properties)
|
|
entry
|
|
(let ((item (manifest-entry-item entry)))
|
|
(manifest-entry
|
|
(inherit entry)
|
|
(properties
|
|
(match (and (package? item) (package-provenance item))
|
|
(#f properties)
|
|
(sexp `((provenance ,@sexp)
|
|
,@properties)))))))))
|