Fixed some potential nil pointer exceptions

Author: cmaglie

Diff for: arduino/discovery/discovery.go

@@ -118,14 +118,17 @@ func PortFromRPCPort(o *rpc.Port) (p *Port) {
 	if o == nil {
 		return nil
 	}
-	return &Port{
+	res := &Port{
 		Address:       o.Address,
 		AddressLabel:  o.Label,
 		Protocol:      o.Protocol,
 		ProtocolLabel: o.ProtocolLabel,
 		HardwareID:    o.HardwareId,
-		Properties:    properties.NewFromHashmap(o.Properties),
 	}
+	if o.Properties != nil {
+		res.Properties = properties.NewFromHashmap(o.Properties)
+	}
+	return res
 }
 
 func (p *Port) String() string {
@@ -141,7 +144,9 @@ func (p *Port) Clone() *Port {
 		return nil
 	}
 	var res Port = *p
-	res.Properties = p.Properties.Clone()
+	if p.Properties != nil {
+		res.Properties = p.Properties.Clone()
+	}
 	return &res
 }
 

Diff for: arduino/discovery/discovery_client/main.go

@@ -51,10 +51,12 @@ func main() {
 		fmt.Printf("   Address: %s\n", port.Address)
 		fmt.Printf("  Protocol: %s\n", port.Protocol)
 		if ev.Type == "add" {
-			keys := port.Properties.Keys()
-			sort.Strings(keys)
-			for _, k := range keys {
-				fmt.Printf("            %s=%s\n", k, port.Properties.Get(k))
+			if port.Properties != nil {
+				keys := port.Properties.Keys()
+				sort.Strings(keys)
+				for _, k := range keys {
+					fmt.Printf("            %s=%s\n", k, port.Properties.Get(k))
+				}
 			}
 		}
 		fmt.Println()

Diff for: commands/board/list.go

@@ -34,6 +34,7 @@ import (
 	"github.com/arduino/arduino-cli/commands"
 	"github.com/arduino/arduino-cli/internal/inventory"
 	rpc "github.com/arduino/arduino-cli/rpc/cc/arduino/cli/commands/v1"
+	"github.com/arduino/go-properties-orderedmap"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 )
@@ -128,20 +129,22 @@ func apiByVidPid(vid, pid string) ([]*rpc.BoardListItem, error) {
 	}, nil
 }
 
-func identifyViaCloudAPI(port *discovery.Port) ([]*rpc.BoardListItem, error) {
+func identifyViaCloudAPI(props *properties.Map) ([]*rpc.BoardListItem, error) {
 	// If the port is not USB do not try identification via cloud
-	id := port.Properties
-	if !id.ContainsKey("vid") || !id.ContainsKey("pid") {
+	if !props.ContainsKey("vid") || !props.ContainsKey("pid") {
 		return nil, nil
 	}
 
 	logrus.Debug("Querying builder API for board identification...")
-	return cachedAPIByVidPid(id.Get("vid"), id.Get("pid"))
+	return cachedAPIByVidPid(props.Get("vid"), props.Get("pid"))
 }
 
 // identify returns a list of boards checking first the installed platforms or the Cloud API
 func identify(pme *packagemanager.Explorer, port *discovery.Port) ([]*rpc.BoardListItem, error) {
 	boards := []*rpc.BoardListItem{}
+	if port.Properties == nil {
+		return boards, nil
+	}
 
 	// first query installed cores through the Package Manager
 	logrus.Debug("Querying installed cores for board identification...")
@@ -167,7 +170,7 @@ func identify(pme *packagemanager.Explorer, port *discovery.Port) ([]*rpc.BoardL
 	// if installed cores didn't recognize the board, try querying
 	// the builder API if the board is a USB device port
 	if len(boards) == 0 {
-		items, err := identifyViaCloudAPI(port)
+		items, err := identifyViaCloudAPI(port.Properties)
 		if err != nil {
 			// this is bad, but keep going
 			logrus.WithError(err).Debug("Error querying builder API")

Diff for: commands/board/list_test.go

@@ -103,10 +103,7 @@ func TestGetByVidPidMalformedResponse(t *testing.T) {
 }
 
 func TestBoardDetectionViaAPIWithNonUSBPort(t *testing.T) {
-	port := &discovery.Port{
-		Properties: properties.NewMap(),
-	}
-	items, err := identifyViaCloudAPI(port)
+	items, err := identifyViaCloudAPI(properties.NewMap())
 	require.NoError(t, err)
 	require.Empty(t, items)
 }

Diff for: commands/upload/upload.go

@@ -496,8 +496,10 @@ func runProgramAction(pme *packagemanager.Explorer,
 	uploadProperties.Set("upload.port.label", port.AddressLabel)
 	uploadProperties.Set("upload.port.protocol", port.Protocol)
 	uploadProperties.Set("upload.port.protocolLabel", port.ProtocolLabel)
-	for prop, value := range actualPort.Properties.AsMap() {
-		uploadProperties.Set(fmt.Sprintf("upload.port.properties.%s", prop), value)
+	if actualPort.Properties != nil {
+		for prop, value := range actualPort.Properties.AsMap() {
+			uploadProperties.Set(fmt.Sprintf("upload.port.properties.%s", prop), value)
+		}
 	}
 
 	// Run recipes for upload