* `nix-env -qa --description' shows human-readable descriptions of

  packages (provided that they have a `meta.description' attribute).
  E.g.,

  $ ./src/nix-env/nix-env -qa --description gcc
  gcc-4.0.2   GNU Compiler Collection, 4.0.x (cross-compiler for sparc-linux)
  gcc-4.0.2   GNU Compiler Collection, 4.0.x (cross-compiler for mips-linux)
  gcc-4.0.2   GNU Compiler Collection, 4.0.x (cross-compiler for arm-linux)
  gcc-4.0.2   GNU Compiler Collection, 4.0.x

2 files changed, 10 insertions, 2 deletions

diff --git a/tests/user-envs.nix.in b/tests/user-envs.nix.in
index 21feea0d31c9..6b9bbe86db41 100644
--- a/tests/user-envs.nix.in
+++ b/tests/user-envs.nix.in
@@ -7,12 +7,16 @@ assert foo == "foo";
 
 let {
 
-  makeDrv = name: progName: derivation {
+  makeDrv = name: progName: (derivation {
     inherit name progName system;
     builder = "@shell@";
     shell = "@shell@";
     args = ["-e" "-x" ./user-envs.builder.sh];
-  };
+  } // {
+    meta = {
+      description = "A silly test package";
+    };
+  });
 
   body = [
     (makeDrv "foo-1.0" "foo")
diff --git a/tests/user-envs.sh b/tests/user-envs.sh
index b8df8c37355c..b1ba0ccc164d 100644
--- a/tests/user-envs.sh
+++ b/tests/user-envs.sh
@@ -1,6 +1,7 @@
 source common.sh
 
 profiles="$NIX_STATE_DIR"/profiles
+rm -f $profiles/*
 
 # Query installed: should be empty.
 test "$($nixenv -p $profiles/test -q '*' | wc -l)" -eq 0
@@ -8,6 +9,9 @@ test "$($nixenv -p $profiles/test -q '*' | wc -l)" -eq 0
 # Query available: should contain several.
 test "$($nixenv -p $profiles/test -f ./user-envs.nix -qa '*' | wc -l)" -eq 5
 
+# Query descriptions.
+$nixenv -p $profiles/test -f ./user-envs.nix -qa '*' --description | grep silly
+
 # Install "foo-1.0".
 $nixenv -p $profiles/test -f ./user-envs.nix -i foo-1.0