let Pi nodes be visible/editable on all platforms

even where they are not physically available.

nodes/core/hardware/36-rpi-gpio.js

@@ -6,35 +6,36 @@ module.exports = function(RED) {
     var fs = require('fs');
 
     var gpioCommand = __dirname+'/nrgpio';
+    var allOK = true;
 
     try {
         var cpuinfo = fs.readFileSync("/proc/cpuinfo").toString();
-        if (cpuinfo.indexOf(": BCM") === -1) { throw "Info : "+RED._("rpi-gpio.errors.ignorenode"); }
+        if (cpuinfo.indexOf(": BCM") === -1) {
-    } catch(err) {
+            allOK = false;
-        throw "Info : "+RED._("rpi-gpio.errors.ignorenode");
+            RED.log.warn("rpi-gpio : "+RED._("rpi-gpio.errors.ignorenode"));
         }
-
         try {
             fs.statSync("/usr/share/doc/python-rpi.gpio"); // test on Raspbian
             // /usr/lib/python2.7/dist-packages/RPi/GPIO
         } catch(err) {
             try {
                 fs.statSync("/usr/lib/python2.7/site-packages/RPi/GPIO"); // test on Arch
-        }
+            } catch(err) {
-        catch(err) {
                 try {
                     fs.statSync("/usr/lib/python2.7/dist-packages/RPi/GPIO"); // test on Hypriot
-            }
+                } catch(err) {
-            catch(err) {
+                    RED.log.warn("rpi-gpio : "+RED._("rpi-gpio.errors.libnotfound"));
-                RED.log.warn(RED._("rpi-gpio.errors.libnotfound"));
+                    allOK = false;
-                throw "Warning : "+RED._("rpi-gpio.errors.libnotfound");
                 }
             }
         }
-
         if ( !(1 & parseInt((fs.statSync(gpioCommand).mode & parseInt("777", 8)).toString(8)[0]) )) {
-        RED.log.error(RED._("rpi-gpio.errors.needtobeexecutable",{command:gpioCommand}));
+            RED.log.warn("rpi-gpio : "+RED._("rpi-gpio.errors.needtobeexecutable",{command:gpioCommand}));
-        throw "Error : "+RED._("rpi-gpio.errors.mustbeexecutable");
+            allOK = false;
+        }
+    } catch(err) {
+        allOK = false;
+        RED.log.warn("rpi-gpio : "+RED._("rpi-gpio.errors.ignorenode"));
     }
 
     // the magic to make python print stuff immediately
@@ -61,6 +62,7 @@ module.exports = function(RED) {
             }
         }
 
+        if (allOK === true) {
             if (node.pin !== undefined) {
                 node.child = spawn(gpioCommand, ["in",node.pin,node.intype,node.debounce]);
                 node.running = true;
@@ -104,6 +106,19 @@ module.exports = function(RED) {
             else {
                 node.warn(RED._("rpi-gpio.errors.invalidpin")+": "+node.pin);
             }
+        }
+        else {
+            node.status({fill:"grey",shape:"dot",text:"node-red:rpi-gpio.status.not-available"});
+            if (node.read === true) {
+                var val;
+                if (node.intype == "up") { val = 1; }
+                if (node.intype == "down") { val = 0; }
+                setTimeout(function(){
+                    node.send({ topic:"pi/"+node.pin, payload:val });
+                    node.status({fill:"grey",shape:"dot",text:RED._("rpi-gpio.status.na",{value:val})});
+                },250);
+            }
+        }
 
         node.on("close", function(done) {
             node.status({fill:"grey",shape:"ring",text:"rpi-gpio.status.closed"});
@@ -155,6 +170,7 @@ module.exports = function(RED) {
             else { node.warn(RED._("rpi-gpio.errors.invalidinput")+": "+out); }
         }
 
+        if (allOK === true) {
             if (node.pin !== undefined) {
                 if (node.set && (node.out === "out")) {
                     node.child = spawn(gpioCommand, [node.out,node.pin,node.level]);
@@ -196,6 +212,13 @@ module.exports = function(RED) {
             else {
                 node.warn(RED._("rpi-gpio.errors.invalidpin")+": "+node.pin);
             }
+        }
+        else {
+            node.status({fill:"grey",shape:"dot",text:"node-red:rpi-gpio.status.not-available"});
+            node.on("input", function(msg){
+                node.status({fill:"grey",shape:"dot",text:RED._("rpi-gpio.status.na",{value:msg.payload.toString()})});
+            });
+        }
 
         node.on("close", function(done) {
             node.status({fill:"grey",shape:"ring",text:"rpi-gpio.status.closed"});
@@ -216,12 +239,13 @@ module.exports = function(RED) {
         this.butt = n.butt || 7;
         var node = this;
 
+        if (allOK === true) {
             node.child = spawn(gpioCommand+".py", ["mouse",node.butt]);
             node.status({fill:"green",shape:"dot",text:"common.status.ok"});
 
             node.child.stdout.on('data', function (data) {
                 data = Number(data);
-            if (data === 1) { node.send({ topic:"pi/mouse", button:data, payload:1 }); }
+                if (data !== 0) { node.send({ topic:"pi/mouse", button:data, payload:1 }); }
                 else { node.send({ topic:"pi/mouse", button:data, payload:0 }); }
             });
 
@@ -256,12 +280,17 @@ module.exports = function(RED) {
                 else { done(); }
             });
         }
+        else {
+            node.status({fill:"grey",shape:"dot",text:"node-red:rpi-gpio.status.not-available"});
+        }
+    }
     RED.nodes.registerType("rpi-mouse",PiMouseNode);
 
     function PiKeyboardNode(n) {
         RED.nodes.createNode(this,n);
         var node = this;
 
+        if (allOK === true) {
             node.child = spawn(gpioCommand+".py", ["kbd","0"]);
             node.status({fill:"green",shape:"dot",text:"common.status.ok"});
 
@@ -304,6 +333,10 @@ module.exports = function(RED) {
             else { done(); }
         });
         }
+        else {
+            node.status({fill:"grey",shape:"dot",text:"node-red:rpi-gpio.status.not-available"});
+        }
+    }
     RED.nodes.registerType("rpi-keyboard",PiKeyboardNode);
 
     var pitype = { type:"" };

nodes/core/locales/en-US/messages.json

@@ -787,7 +787,7 @@
         },
         "errors": {
             "ignorenode": "Ignoring Raspberry Pi specific node",
-            "version": "Version command failed",
+            "version": "Failed to get version from Pi",
             "sawpitype": "Saw Pi Type",
             "libnotfound": "Cannot find Pi RPi.GPIO python library",
             "alreadyset": "GPIO pin __pin__ already set as type: __type__",