Re: improve error message for `guix environment'

[David Thompson <dthompson2@worcester.edu>]

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Tomáš Čech <sleep_walker@gnu.org> writes:

> When network issue occurs during `guix environment <package>' call,
> the error message is too cryptic:

If you can reproduce it, could you please apply this patch and tell me
if it makes things any better?  The 'with-error-handling' form will
catch a bunch of possible errors and print out friendlier messages.

Thanks!


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From 13113846f0f19b57f271dc71b5cbc606d8c2b68a Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Mon, 16 Mar 2015 08:59:59 -0400
Subject: [PATCH] scripts: environment: Improve error messages.

* guix/scripts/environment.scm (guix-environmnet): Wrap procedure body with
  error handling form.
---
 guix/scripts/environment.scm | 37 +++++++++++++++++++------------------
 1 file changed, 19 insertions(+), 18 deletions(-)

diff --git a/guix/scripts/environment.scm b/guix/scripts/environment.scm
index c96ca35..80ae924 100644
--- a/guix/scripts/environment.scm
+++ b/guix/scripts/environment.scm
@@ -220,21 +220,22 @@ packages."
   (define (handle-argument arg result)
     (alist-cons 'package arg result))
 
-  (with-store store
-    (let* ((opts  (parse-command-line args %options (list %default-options)
-                                      #:argument-handler handle-argument))
-           (pure? (assoc-ref opts 'pure))
-           (command (assoc-ref opts 'exec))
-           (inputs (packages->transitive-inputs
-                    (pick-all (options/resolve-packages opts) 'package)))
-           (drvs (run-with-store store
-                   (mbegin %store-monad
-                     (set-guile-for-build (default-guile))
-                     (build-inputs inputs opts)))))
-      (cond ((assoc-ref opts 'dry-run?)
-             #t)
-            ((assoc-ref opts 'search-paths)
-             (show-search-paths inputs drvs pure?))
-            (else
-             (create-environment inputs drvs pure?)
-             (system command))))))
+  (with-error-handling
+    (with-store store
+      (let* ((opts  (parse-command-line args %options (list %default-options)
+                                        #:argument-handler handle-argument))
+             (pure? (assoc-ref opts 'pure))
+             (command (assoc-ref opts 'exec))
+             (inputs (packages->transitive-inputs
+                      (pick-all (options/resolve-packages opts) 'package)))
+             (drvs (run-with-store store
+                     (mbegin %store-monad
+                       (set-guile-for-build (default-guile))
+                       (build-inputs inputs opts)))))
+        (cond ((assoc-ref opts 'dry-run?)
+               #t)
+              ((assoc-ref opts 'search-paths)
+               (show-search-paths inputs drvs pure?))
+              (else
+               (create-environment inputs drvs pure?)
+               (system command)))))))
-- 
2.1.4


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-- 
David Thompson
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