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describe: Save the original value of (program-arguments).

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Fixes <https://bugs.gnu.org/42688>.
Reported by pkill9 <pkill9@runbox.com>.

This ensures that 'guix repl -s SCRIPT' give SCRIPT the right value
of (current-profile), which in turn ensures that (%package-module-path)
is initialized with the right set of channels.

* guix/describe.scm (initial-program-arguments): New variable.
(current-profile): Use it.
* guix/scripts/repl.scm (guix-repl): Call 'current-profile' before
'set-program-arguments'.
This commit is contained in:
Ludovic Courtès 2020-09-19 16:26:44 +02:00
parent 0996fcc657
commit 1b179d7876
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GPG key ID: 090B11993D9AEBB5
2 changed files with 16 additions and 2 deletions
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10
guix/describe.scm
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@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018, 2019 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@ -43,11 +43,17 @@ (define-module (guix describe)
;;;
;;; Code:
(define initial-program-arguments
;; Save the initial program arguments. This allows us to see the "real"
;; 'guix' program, even if 'guix repl -s' calls 'set-program-arguments'
;; later on.
(program-arguments))
(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)
(match initial-program-arguments
((program . _)
(and (string-suffix? "/bin/guix" program)
;; Note: We want to do _lexical dot-dot resolution_. Using ".."

8
guix/scripts/repl.scm
View file

@ -27,6 +27,7 @@ (define-module (guix scripts repl)
#:use-module (srfi srfi-37)
#:use-module (ice-9 match)
#:use-module (rnrs bytevectors)
#:autoload (guix describe) (current-profile)
#:autoload (system repl repl) (start-repl)
#:autoload (system repl server)
(make-tcp-server-socket make-unix-domain-server-socket)
@ -176,6 +177,13 @@ (define script
;; Run script
(save-module-excursion
(lambda ()
;; Invoke 'current-profile' so that it memoizes the correct value
;; based on (program-arguments), before we call
;; 'set-program-arguments'. This in turn ensures that
;; (%package-module-path) will contain entries for the channels
;; available in the current profile.
(current-profile)
(set-program-arguments script)
(set-user-module)