Enable it to store icon files in {settings.userDir}/lib/icons directory for dynamic nodes's icon feature (#1536)

red/runtime/nodes/registry/localfilesystem.js

@@ -232,6 +232,12 @@ function getNodeFiles(disableNodePathScan) {
     }
 
     if (settings.userDir) {
+        dir = path.join(settings.userDir,"lib","icons");
+        iconList = scanIconDir(dir);
+        if (iconList.length > 0) {
+            events.emit("node-icon-dir",{name:'Library',path:dir,icons:iconList});
+        }
+
         dir = path.join(settings.userDir,"nodes");
         nodeFiles = nodeFiles.concat(getLocalNodeFiles(dir));
     }

test/red/runtime/nodes/registry/localfilesystem_spec.js

@@ -155,10 +155,12 @@ describe("red/nodes/registry/localfilesystem",function() {
             localfilesystem.init({
                 i18n:{registerMessageCatalog:function(){}},
                 events:{emit:function(eventName,dir){
-                    eventName.should.equal("node-icon-dir");
-                    dir.name.should.equal("node-red");
-                    dir.icons.should.be.an.Array();
-                    if (count++ === 1) {
+                    if (count === 0) {
+                        eventName.should.equal("node-icon-dir");
+                        dir.name.should.equal("node-red");
+                        dir.icons.should.be.an.Array();
+                        count = 1;
+                    } else if (count === 1) {
                         done();
                     }
                 }},
@@ -166,6 +168,28 @@ describe("red/nodes/registry/localfilesystem",function() {
             });
             localfilesystem.getNodeFiles(true);
         });
+        it("scans icons dir in library",function(done) {
+            var count = 0;
+            localfilesystem.init({
+                i18n:{registerMessageCatalog:function(){}},
+                events:{emit:function(eventName,dir){
+                    eventName.should.equal("node-icon-dir");
+                    if (count === 0) {
+                        dir.name.should.equal("node-red");
+                        dir.icons.should.be.an.Array();
+                        count = 1;
+                    } else if (count === 1) {
+                        dir.name.should.equal("Library");
+                        dir.icons.should.be.an.Array();
+                        dir.icons.length.should.equal(1);
+                        dir.icons[0].should.be.equal("test_icon.png");
+                        done();
+                    }
+                }},
+                settings:{userDir:userDir}
+            });
+            localfilesystem.getNodeFiles(true);
+        });
     });
     describe("#getModuleFiles",function() {
         it("gets a nodes module files",function(done) {