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guix system: Protect against changes to $PATH when activating the system.

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Partly fixes <http://bugs.gnu.org/18082>.
Reported by Mark H Weaver <mhw@netris.org>.

* guix/scripts/system.scm (save-environment-excursion): New macro.
  (switch-to-system): Wrap 'primitive-load' call in it.
This commit is contained in:
Ludovic Courtès 2014-07-23 18:17:06 +02:00
parent b6debdaa22
commit 720ee245da
1 changed files with 15 additions and 1 deletions
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16
guix/scripts/system.scm
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@ -172,6 +172,16 @@ (define %system-profile
;; The system profile.
(string-append %state-directory "/profiles/system"))
(define-syntax-rule (save-environment-excursion body ...)
"Save the current environment variables, run BODY..., and restore them."
(let ((env (environ)))
(dynamic-wind
(const #t)
(lambda ()
body ...)
(lambda ()
(environ env)))))
(define* (switch-to-system os
#:optional (profile %system-profile))
"Make a new generation of PROFILE pointing to the directory of OS, switch to
@ -185,7 +195,11 @@ (define* (switch-to-system os
(switch-symlinks profile generation)
(format #t (_ "activating system...~%"))
(return (primitive-load (derivation->output-path script)))
;; The activation script may change $PATH, among others, so protect
;; against that.
(return (save-environment-excursion
(primitive-load (derivation->output-path script))))
;; TODO: Run 'deco reload ...'.
)))