Using pname and fetching versions

pkgs/development/ruby-modules/bundled-common/default.nix

@@ -5,8 +5,8 @@
 }@defs:
 
 {
-  name
-, pname ? name
+  name ? null
+, pname ? null
 , mainGemName ? null
 , gemdir ? null
 , gemfile ? null
@@ -22,6 +22,8 @@
 , ...
 }@args:
 
+assert name == null -> pname != null;
+
 with  import ./functions.nix { inherit lib gemConfig; };
 
 let
@@ -43,6 +45,20 @@ let
 
   gems = lib.flip lib.mapAttrs configuredGemset (name: attrs: buildGem name attrs);
 
+  name' = if name != null then
+    name
+  else
+    let
+      gem = gems."${pname}";
+      version = gem.version;
+    in
+      "${pname}-${version}";
+
+  pname' = if pname != null then
+    pname
+  else
+    name;
+
   copyIfBundledByPath = { bundledByPath ? false, ...}@main:
   (if bundledByPath then
       assert gemFiles.gemdir != null; "cp -a ${gemFiles.gemdir}/* $out/"
@@ -80,7 +96,7 @@ let
   basicEnv = buildEnv {
     inherit  ignoreCollisions;
 
-    name = if name == null then pname else name;
+    name = name';
 
     paths = envPaths;
     pathsToLink = [ "/lib" ];

pkgs/development/ruby-modules/bundler-app/default.nix

@@ -7,10 +7,11 @@
 # (shell)> bundix
 # Then use rubyTool in the default.nix:
 
-# rubyTool { name = "gemifiedTool"; gemdir = ./.; exes = ["gemified-tool"]; }
+# rubyTool { pname = "gemifiedTool"; gemdir = ./.; exes = ["gemified-tool"]; }
 # The 'exes' parameter ensures that a copy of e.g. rake doesn't polute the system.
 {
-  name
+  # use the name of the name in question; its version will be picked up from the gemset
+  pname
   # gemdir is the location of the Gemfile{,.lock} and gemset.nix; usually ./.
 , gemdir
   # Exes is the list of executables provided by the gems in the Gemfile
@@ -30,10 +31,10 @@
 let
   basicEnv = (callPackage ../bundled-common {}) args;
 
-  cmdArgs = removeAttrs args [ "name" "postBuild" ]
+  cmdArgs = removeAttrs args [ "pname" "postBuild" ]
   // { inherit preferLocalBuild allowSubstitutes; }; # pass the defaults
 in
-   runCommand name cmdArgs ''
+   runCommand basicEnv.name cmdArgs ''
     mkdir -p $out/bin;
       ${(lib.concatMapStrings (x: "ln -s '${basicEnv}/bin/${x}' $out/bin/${x};\n") exes)}
       ${(lib.concatMapStrings (s: "makeWrapper $out/bin/$(basename ${s}) $srcdir/${s} " +

pkgs/development/ruby-modules/bundler-env/default.nix

@@ -22,11 +22,6 @@
 let
   inherit (import ../bundled-common/functions.nix {inherit lib ruby gemConfig groups; }) genStubsScript;
 
-  drvName =
-    if name != null then lib.traceVal name
-    else if pname != null then "${toString pname}-${basicEnv.gems."${pname}".version}"
-    else throw "bundlerEnv: either pname or name must be set";
-
   basicEnv = (callPackage ../bundled-common {}) (args // { inherit pname name; mainGemName = pname; });
 
   inherit (basicEnv) envPaths;
@@ -48,7 +43,7 @@ in
     (buildEnv {
       inherit ignoreCollisions;
 
-      name = drvName;
+      name = basicEnv.name;
 
       paths = envPaths;
       pathsToLink = [ "/lib" ];

pkgs/development/tools/corundum/default.nix

@@ -1,4 +1,4 @@
-{ lib, rubyTool }:
+{ lib, bundlerApp }:
 
 bundlerApp {
   pname = "corundum";