guix package: '--search-paths' can report combined search paths.

Partly fixes <http://bugs.gnu.org/20255>.

* guix/scripts/package.scm (search-path-environment-variables): Change
  'profile' to 'profiles'; expect it to be a list.
  (display-search-paths): Likewise.
  (%default-options): Remove 'profile' entry.
  (%options) <--profile>: Keep previous values associated with 'profile'
  in RESULT.
  (guix-package)[process-actions, process-query]: Handle the possible
  lack of 'profile' pair in OPTS.

1 files changed, 11 insertions, 1 deletions

diff --git a/tests/guix-package-net.sh b/tests/guix-package-net.sh
index 14222cfd25..35ef6ff1a0 100644
--- a/tests/guix-package-net.sh
+++ b/tests/guix-package-net.sh
@@ -46,9 +46,10 @@ fi
 
 
 profile="t-profile-$$"
+profile_alt="t-profile-alt-$$"
 rm -f "$profile"
 
-trap 'rm -f "$profile" "$profile-"[0-9]* ; rm -rf t-home-'"$$" EXIT
+trap 'rm -f "$profile" "$profile_alt" "$profile-"[0-9]* ; rm -rf t-home-'"$$" EXIT
 
 
 guix package --bootstrap -p "$profile" -i guile-bootstrap
@@ -156,6 +157,15 @@ guix package -p "$profile" --switch-generation=2
 guix package -p "$profile" --delete-generations=3
 test -z "`guix package -p "$profile" -l 3`"
 
+# Search path of combined profiles.  'LIBRARY_PATH' should show up only in the
+# combination, not in the individual profiles.
+rm "$profile"
+guix package --bootstrap -p "$profile" -i guile-bootstrap
+guix package --bootstrap -p "$profile_alt" -i gcc-bootstrap
+if guix package -p "$profile" --search-paths | grep LIBRARY_PATH
+then false; fi
+guix package -p "$profile" -p "$profile_alt" --search-paths \
+     | grep "LIBRARY_PATH.*$profile/lib"
 
 #
 # Try with the default profile.