guix environment: Add --ad-hoc option.
* guix/scripts/environment.scm (%options): Add "ad-hoc" option. (show-help): Display help for "--ad-hoc". (packages+propagated-inputs): New procedure. (guix-environment): Create ad hoc environment when asked. * doc/guix.texi ("invoking guix environment"): Document it.
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@ -3932,6 +3932,21 @@ evaluates to.
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@item -E @var{command}
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Execute @var{command} in the new environment.
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@item --ad-hoc
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Include all specified packages in the resulting environment, as if an
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@i{ad hoc} package were defined with them as inputs. This option is
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useful for quickly creating an environment without having to write a
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package expression to contain the desired inputs.
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For instance, the command:
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@example
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guix environment --ad-hoc guile guile-sdl -E guile
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@end example
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runs @command{guile} in an environment where Guile and Guile-SDL are
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available.
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@item --pure
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Unset existing environment variables when building the new environment.
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This has the effect of creating an environment in which search paths
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@ -1,5 +1,5 @@
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;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2014 David Thompson <davet@gnu.org>
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;;; Copyright © 2014, 2015 David Thompson <davet@gnu.org>
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;;; Copyright © 2015 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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@ -102,6 +102,9 @@ shell command in that environment.\n"))
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FILE evaluates to"))
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(display (_ "
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-E, --exec=COMMAND execute COMMAND in new environment"))
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(display (_ "
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--ad-hoc include all specified packages in the environment instead
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of only their inputs"))
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(display (_ "
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--pure unset existing environment variables"))
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(display (_ "
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@ -147,6 +150,9 @@ shell command in that environment.\n"))
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(option '(#\e "expression") #t #f
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(lambda (opt name arg result)
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(alist-cons 'expression arg result)))
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(option '("ad-hoc") #f #f
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(lambda (opt name arg result)
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(alist-cons 'ad-hoc? #t result)))
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(option '(#\n "dry-run") #f #f
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(lambda (opt name arg result)
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(alist-cons 'dry-run? #t result)))
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@ -191,6 +197,18 @@ packages."
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(delete-duplicates
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(append-map transitive-inputs packages)))
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(define (packages+propagated-inputs packages)
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"Return a list containing PACKAGES plus all of their propagated inputs."
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(delete-duplicates
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(append packages
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(map (match-lambda
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((or (_ (? package? package))
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(_ (? package? package) _))
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package)
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(_ #f))
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(append-map package-transitive-propagated-inputs
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packages)))))
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(define (build-inputs inputs opts)
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"Build the packages in INPUTS using the build options in OPTS."
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(let ((substitutes? (assoc-ref opts 'substitutes?))
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@ -218,9 +236,12 @@ packages."
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(let* ((opts (parse-command-line args %options (list %default-options)
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#:argument-handler handle-argument))
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(pure? (assoc-ref opts 'pure))
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(ad-hoc? (assoc-ref opts 'ad-hoc?))
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(command (assoc-ref opts 'exec))
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(inputs (packages->transitive-inputs
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(pick-all (options/resolve-packages opts) 'package)))
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(packages (pick-all (options/resolve-packages opts) 'package))
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(inputs (if ad-hoc?
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(packages+propagated-inputs packages)
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(packages->transitive-inputs packages)))
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(drvs (run-with-store store
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(mbegin %store-monad
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(set-guile-for-build (default-guile))
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