Re: guix environment

[David Thompson <dthompson2@worcester.edu>]

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Ludovic Courtès <ludo@gnu.org> writes:

> On closer inspection, I see two issues:
>
>   (define (packages->transitive-inputs packages)
>     "Return a list of the transitive inputs for all PACKAGES."
>     (define (transitive-inputs package)
>       (filter-map (match-lambda
>                    ((_ (? package? package)) package)
>                    (_ #f))    ; <---- !
>                   (bag-transitive-inputs
>                    (package->bag package))))
>     (delete-duplicates
>      (append-map transitive-inputs packages)))
>
> Here only inputs of the form ("foo" PKG) are considered; things like
> ("glib" ,glib "bin") are discarded.
>
>   (define (for-each-search-path proc inputs derivations pure?)
>     (let ((paths (map derivation->output-path derivations))) ; <-- !
>       [...]
>
> Above, ‘derivation->output-path’ considers only the “out” output,
> ignoring others if they are needed.

Here's a patch.  WDYT?


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From 9609806fb78557d74cf5b3fb47802898ef9d1ecf Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Thu, 29 Jan 2015 17:53:17 -0500
Subject: [PATCH] guix: environment: Consider all package outputs.

* guix/scripts/environment.scm (for-each-search-path): Iterate over all
  derivation output paths.
  (packages->transitive-inputs): Process inputs that specify an output, too.
---
 guix/scripts/environment.scm | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/guix/scripts/environment.scm b/guix/scripts/environment.scm
index ffa3a09..bb2ce53 100644
--- a/guix/scripts/environment.scm
+++ b/guix/scripts/environment.scm
@@ -40,7 +40,12 @@
 Use the output paths of DERIVATIONS to build each search path.  When PURE? is
 #t, the existing search path value is ignored.  Otherwise, the existing search
 path value is appended."
-  (let ((paths (map derivation->output-path derivations)))
+  (let ((paths (append-map (lambda (drv)
+                             (map (match-lambda
+                                   ((_ . output)
+                                    (derivation-output-path output)))
+                                  (derivation-outputs drv)))
+                           derivations)))
     (for-each (match-lambda
                (($ <search-path-specification>
                    variable directories separator)
@@ -177,7 +182,9 @@ packages."
   "Return a list of the transitive inputs for all PACKAGES."
   (define (transitive-inputs package)
     (filter-map (match-lambda
-                 ((_ (? package? package)) package)
+                 ((or (_ (? package? package))
+                      (_ (? package? package) _))
+                  package)
                  (_ #f))
                 (bag-transitive-inputs
                  (package->bag package))))
-- 
2.1.4


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