From b1185da31a702034494e4204fa5592cee7e5f2a7 Mon Sep 17 00:00:00 2001
From: Tom Hughes <tom@compton.nu>
Date: Jan 28 2016 22:29:02 +0000
Subject: req: generate suggests for optional dependencies


---

diff --git a/nodejs.attr b/nodejs.attr
index 832a4be..04ece0b 100644
--- a/nodejs.attr
+++ b/nodejs.attr
@@ -1,3 +1,4 @@
 %__nodejs_provides  %{_rpmconfigdir}/nodejs.prov
 %__nodejs_requires  %{_rpmconfigdir}/nodejs.req
+%__nodejs_suggests  %{_rpmconfigdir}/nodejs.req --optional
 %__nodejs_path  ^/usr/lib.*/node_modules/.*/package\\.json$
diff --git a/nodejs.req b/nodejs.req
index bd1451f..e4b1e30 100755
--- a/nodejs.req
+++ b/nodejs.req
@@ -50,26 +50,32 @@ def main():
         metadata = json.load(fh)
         fh.close()
 
-        #write out the node.js interpreter dependency
-        req = 'nodejs(engine)'
-
-        if 'engines' in metadata and isinstance(metadata['engines'], dict) \
-                                            and 'node' in metadata['engines']:
-            deps += process_dep(req, metadata['engines']['node'])
+        if '--optional' in sys.argv:
+            deptype = 'optionalDependencies'
         else:
-            deps.append(req)
+            deptype = 'dependencies'
+
+        if deptype == 'dependencies':
+            #write out the node.js interpreter dependency
+            req = 'nodejs(engine)'
+
+            if 'engines' in metadata and isinstance(metadata['engines'], dict) \
+                                                and 'node' in metadata['engines']:
+                deps += process_dep(req, metadata['engines']['node'])
+            else:
+                deps.append(req)
 
-        if 'dependencies' in metadata:
-            if isinstance(metadata['dependencies'], dict):
-                for name, version in metadata['dependencies'].iteritems():
+        if deptype in metadata:
+            if isinstance(metadata[deptype], dict):
+                for name, version in metadata[deptype].iteritems():
                     req = 'npm(' + name + ')'
                     deps += process_dep(req, version)
-            elif isinstance(metadata['dependencies'], list):
-                for name in metadata['dependencies']:
+            elif isinstance(metadata[deptype], list):
+                for name in metadata[deptype]:
                     req = 'npm(' + name + ')'
                     deps.append(req)
-            elif isinstance(metadata['dependencies'], basestring):
-                req = 'npm(' + metadata['dependencies'] + ')'
+            elif isinstance(metadata[deptype], basestring):
+                req = 'npm(' + metadata[deptype] + ')'
                 deps.append(req)
             else:
                 raise TypeError('invalid package.json: dependencies not a valid type')