bd7470185b
* guix/scripts/describe.scm: New file. * Makefile.am (MODULES): Add it. (SH_TESTS): Add tests/guix-describe.sh. * po/guix/POTFILES.in: Add it. * guix/scripts/pull.scm (display-profile-content): Export. * guix/describe.scm (current-profile, current-profile-entries): Export. * tests/guix-describe.sh: New file. * doc/guix.texi (Features): Mention 'guix pull' and provenance tracking. (Invoking guix pull): Link to 'guix describe'. (Channels): Likewise. (Invoking guix describe): New node.
75 lines
3 KiB
Scheme
75 lines
3 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
|
;;; Copyright © 2018 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 (srfi srfi-1)
|
|
#:use-module (ice-9 match)
|
|
#:export (current-profile
|
|
current-profile-entries
|
|
package-path-entries))
|
|
|
|
;;; 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-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 package-path-entries
|
|
(mlambda ()
|
|
"Return a list of package path entries to be added to the package search
|
|
path. These entries are taken from the 'guix pull' profile the calling
|
|
process lives in, when applicable."
|
|
;; Filter out Guix itself.
|
|
(filter-map (lambda (entry)
|
|
(and (not (string=? (manifest-entry-name entry)
|
|
"guix"))
|
|
(string-append (manifest-entry-item entry)
|
|
"/share/guile/site/"
|
|
(effective-version))))
|
|
(current-profile-entries))))
|