Add board autodetection on upload

Author: silvanocerza

Diff for: arduino/errors.go

@@ -18,6 +18,7 @@ package arduino
 import (
 	"fmt"
 
+	"github.com/arduino/arduino-cli/arduino/discovery"
 	"github.com/arduino/arduino-cli/i18n"
 	rpc "github.com/arduino/arduino-cli/rpc/cc/arduino/cli/commands/v1"
 	"google.golang.org/grpc/codes"
@@ -123,6 +124,26 @@ func (e *InvalidVersionError) Unwrap() error {
 	return e.Cause
 }
 
+// MultipleBoardsDetectedError is returned when trying to detect
+// the FQBN of a board connected to a port fails because that
+// are multiple possible boards detected.
+type MultipleBoardsDetectedError struct {
+	Port *discovery.Port
+}
+
+func (e *MultipleBoardsDetectedError) Error() string {
+	return tr(
+		"Please specify an FQBN. Multiple possible ports detected on port %s with protocol %s",
+		e.Port.Address,
+		e.Port.Protocol,
+	)
+}
+
+// ToRPCStatus converts the error into a *status.Status
+func (e *MultipleBoardsDetectedError) ToRPCStatus() *status.Status {
+	return status.New(codes.InvalidArgument, e.Error())
+}
+
 // MissingFQBNError is returned when the FQBN is mandatory and not specified
 type MissingFQBNError struct{}
 
@@ -153,6 +174,18 @@ func (e *UnknownFQBNError) ToRPCStatus() *status.Status {
 	return status.New(codes.NotFound, e.Error())
 }
 
+// MissingPortAddressError is returned when the port protocol is mandatory and not specified
+type MissingPortAddressError struct{}
+
+func (e *MissingPortAddressError) Error() string {
+	return tr("Missing port protocol")
+}
+
+// ToRPCStatus converts the error into a *status.Status
+func (e *MissingPortAddressError) ToRPCStatus() *status.Status {
+	return status.New(codes.InvalidArgument, e.Error())
+}
+
 // MissingPortProtocolError is returned when the port protocol is mandatory and not specified
 type MissingPortProtocolError struct{}
 

Diff for: cli/compile/compile.go

@@ -24,6 +24,7 @@ import (
 	"github.com/arduino/arduino-cli/cli/arguments"
 	"github.com/arduino/arduino-cli/cli/feedback"
 	"github.com/arduino/arduino-cli/cli/output"
+	"github.com/arduino/arduino-cli/commands"
 	"github.com/arduino/arduino-cli/configuration"
 	"github.com/arduino/arduino-cli/i18n"
 	"github.com/sirupsen/logrus"
@@ -150,9 +151,26 @@ func runCompileCommand(cmd *cobra.Command, args []string) {
 		overrides = o.Overrides
 	}
 
+	detectedFqbn := fqbn.String()
+	// If the user didn't provide an FQBN it might either mean
+	// that she forgot or that is trying to compile and upload
+	// using board autodetection.
+	if detectedFqbn == "" {
+		sk := arguments.NewSketch(sketchPath)
+		discoveryPort := port.GetDiscoveryPort(inst, sk)
+		rpcPort := discoveryPort.ToRPC()
+		var err error
+		pm := commands.GetPackageManager(inst.Id)
+		detectedFqbn, err = upload.DetectConnectedBoard(pm, rpcPort.Address, rpcPort.Protocol)
+		if err != nil {
+			feedback.Errorf(tr("Error during FQBN detection: %v", err))
+			os.Exit(errorcodes.ErrGeneric)
+		}
+	}
+
 	compileRequest := &rpc.CompileRequest{
 		Instance:                      inst,
-		Fqbn:                          fqbn.String(),
+		Fqbn:                          detectedFqbn,
 		SketchPath:                    sketchPath.String(),
 		ShowProperties:                showProperties,
 		Preprocess:                    preprocess,
@@ -189,6 +207,7 @@ func runCompileCommand(cmd *cobra.Command, args []string) {
 		userFieldRes, err := upload.SupportedUserFields(context.Background(), &rpc.SupportedUserFieldsRequest{
 			Instance: inst,
 			Fqbn:     fqbn.String(),
+			Address:  discoveryPort.Address,
 			Protocol: discoveryPort.Protocol,
 		})
 		if err != nil {
@@ -204,7 +223,7 @@ func runCompileCommand(cmd *cobra.Command, args []string) {
 
 		uploadRequest := &rpc.UploadRequest{
 			Instance:   inst,
-			Fqbn:       fqbn.String(),
+			Fqbn:       detectedFqbn,
 			SketchPath: sketchPath.String(),
 			Port:       discoveryPort.ToRPC(),
 			Verbose:    verbose,

Diff for: cli/upload/upload.go

@@ -104,6 +104,7 @@ func runUploadCommand(command *cobra.Command, args []string) {
 	userFieldRes, err := upload.SupportedUserFields(context.Background(), &rpc.SupportedUserFieldsRequest{
 		Instance: instance,
 		Fqbn:     fqbn.String(),
+		Address:  discoveryPort.Address,
 		Protocol: discoveryPort.Protocol,
 	})
 	if err != nil {

Diff for: commands/upload/upload.go

@@ -52,7 +52,16 @@ func SupportedUserFields(ctx context.Context, req *rpc.SupportedUserFieldsReques
 		return nil, &arduino.InvalidInstanceError{}
 	}
 
-	fqbn, err := cores.ParseFQBN(req.GetFqbn())
+	reqFQBN := req.GetFqbn()
+	if reqFQBN == "" {
+		var err error
+		reqFQBN, err = DetectConnectedBoard(pm, req.Address, req.Protocol)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	fqbn, err := cores.ParseFQBN(reqFQBN)
 	if err != nil {
 		return nil, &arduino.InvalidFQBNError{Cause: err}
 	}
@@ -72,6 +81,76 @@ func SupportedUserFields(ctx context.Context, req *rpc.SupportedUserFieldsReques
 	}, nil
 }
 
+// DetectConnectedBoard returns the FQBN of the board connected to specified address and protocol.
+// In all other cases, like when more than a possible board is detected return an error.
+func DetectConnectedBoard(pm *packagemanager.PackageManager, address, protocol string) (string, error) {
+	if address == "" {
+		return "", &arduino.MissingPortAddressError{}
+	}
+	if protocol == "" {
+		return "", &arduino.MissingPortProtocolError{}
+	}
+
+	dm := pm.DiscoveryManager()
+
+	// Run discoveries if they're not already running
+	if errs := dm.RunAll(); len(errs) > 0 {
+		// Some discovery managed to not run, just log the errors,
+		// we'll fail further down the line.
+		for _, err := range errs {
+			logrus.Error(err)
+		}
+	}
+
+	if errs := dm.StartAll(); len(errs) > 0 {
+		// Some discovery managed to not start, just log the errors,
+		// we'll fail further down the line.
+		for _, err := range errs {
+			logrus.Error(err)
+		}
+	}
+
+	ports, errs := dm.List()
+	if len(errs) > 0 {
+		// Errors at this time are not a big issue, we'll
+		// fail further down the line if we can't find a
+		// matching board and tell the user to provide
+		// an FQBN.
+		for _, err := range errs {
+			logrus.Error(err)
+		}
+	}
+
+	for _, p := range ports {
+		if p.Address == address && p.Protocol == protocol {
+			// Found matching port, let's see if we can detect
+			// which board is connected to it
+			boards := pm.IdentifyBoard(p.Properties)
+			if l := len(boards); l == 1 {
+				// We found only one board connected, that must
+				// the one the user want to upload to.
+				board := boards[0]
+				logrus.
+					WithField("board", board.String()).
+					WithField("address", address).
+					WithField("protocol", protocol).
+					Trace("Detected board")
+				return board.FQBN(), nil
+			} else if l >= 2 {
+				// There are multiple boards detected on this port,
+				// we have no way of knowing which one is the one.
+				return "", &arduino.MultipleBoardsDetectedError{Port: p}
+			} else {
+				// We found a matching port but there's either
+				// no board connected or we can't recognize it.
+				// The user must provide an FQBN.
+				break
+			}
+		}
+	}
+	return "", &arduino.MissingFQBNError{}
+}
+
 // getToolID returns the ID of the tool that supports the action and protocol combination by searching in props.
 // Returns error if tool cannot be found.
 func getToolID(props *properties.Map, action, protocol string) (string, error) {
@@ -190,9 +269,15 @@ func runProgramAction(pm *packagemanager.PackageManager,
 	if fqbnIn == "" && sk != nil && sk.Metadata != nil {
 		fqbnIn = sk.Metadata.CPU.Fqbn
 	}
+
 	if fqbnIn == "" {
-		return &arduino.MissingFQBNError{}
+		var err error
+		fqbnIn, err = DetectConnectedBoard(pm, port.Address, port.Protocol)
+		if err != nil {
+			return err
+		}
 	}
+
 	fqbn, err := cores.ParseFQBN(fqbnIn)
 	if err != nil {
 		return &arduino.InvalidFQBNError{Cause: err}