Add monitor --describe command (arduino#1493)

* Resolve monitors from platform.txt

* Implementation of monitor --describe command

* fix i18n

Author: cmaglie

Diff for: arduino/cores/cores.go

@@ -62,6 +62,7 @@ type PlatformRelease struct {
 	IsIDEBundled            bool                   `json:"-"`
 	IsTrusted               bool                   `json:"-"`
 	PluggableDiscoveryAware bool                   `json:"-"` // true if the Platform supports pluggable discovery (no compatibility layer required)
+	Monitors                map[string]*MonitorDependency
 }
 
 // BoardManifest contains information about a board. These metadata are usually

Diff for: arduino/cores/packagemanager/loader.go

@@ -326,6 +326,7 @@ func (pm *PackageManager) loadPlatformRelease(platform *cores.PlatformRelease, p
 	} else {
 		platform.Properties.Set("pluggable_discovery.required.0", "builtin:serial-discovery")
 		platform.Properties.Set("pluggable_discovery.required.1", "builtin:mdns-discovery")
+		platform.Properties.Set("pluggable_monitor.required.serial", "builtin:serial-monitor")
 	}
 
 	if platform.Platform.Name == "" {
@@ -359,6 +360,19 @@ func (pm *PackageManager) loadPlatformRelease(platform *cores.PlatformRelease, p
 	if !platform.PluggableDiscoveryAware {
 		convertLegacyPlatformToPluggableDiscovery(platform)
 	}
+
+	// Build pluggable monitor references
+	platform.Monitors = map[string]*cores.MonitorDependency{}
+	for protocol, ref := range platform.Properties.SubTree("pluggable_monitor.required").AsMap() {
+		split := strings.Split(ref, ":")
+		if len(split) != 2 {
+			return fmt.Errorf(tr("invalid pluggable monitor reference: %s"), ref)
+		}
+		platform.Monitors[protocol] = &cores.MonitorDependency{
+			Packager: split[0],
+			Name:     split[1],
+		}
+	}
 	return nil
 }
 

Diff for: cli/cli.go

@@ -35,6 +35,7 @@ import (
 	"github.com/arduino/arduino-cli/cli/generatedocs"
 	"github.com/arduino/arduino-cli/cli/globals"
 	"github.com/arduino/arduino-cli/cli/lib"
+	"github.com/arduino/arduino-cli/cli/monitor"
 	"github.com/arduino/arduino-cli/cli/outdated"
 	"github.com/arduino/arduino-cli/cli/output"
 	"github.com/arduino/arduino-cli/cli/sketch"
@@ -93,6 +94,7 @@ func createCliCommandTree(cmd *cobra.Command) {
 	cmd.AddCommand(daemon.NewCommand())
 	cmd.AddCommand(generatedocs.NewCommand())
 	cmd.AddCommand(lib.NewCommand())
+	cmd.AddCommand(monitor.NewCommand())
 	cmd.AddCommand(outdated.NewCommand())
 	cmd.AddCommand(sketch.NewCommand())
 	cmd.AddCommand(update.NewCommand())

Diff for: cli/monitor/monitor.go

@@ -0,0 +1,105 @@
+// This file is part of arduino-cli.
+//
+// Copyright 2020 ARDUINO SA (http://www.arduino.cc/)
+//
+// This software is released under the GNU General Public License version 3,
+// which covers the main part of arduino-cli.
+// The terms of this license can be found at:
+// https://www.gnu.org/licenses/gpl-3.0.en.html
+//
+// You can be released from the requirements of the above licenses by purchasing
+// a commercial license. Buying such a license is mandatory if you want to
+// modify or otherwise use the software for commercial activities involving the
+// Arduino software without disclosing the source code of your own applications.
+// To purchase a commercial license, send an email to [email protected].
+
+package monitor
+
+import (
+	"context"
+	"os"
+	"sort"
+	"strings"
+
+	"github.com/arduino/arduino-cli/cli/arguments"
+	"github.com/arduino/arduino-cli/cli/errorcodes"
+	"github.com/arduino/arduino-cli/cli/feedback"
+	"github.com/arduino/arduino-cli/cli/instance"
+	"github.com/arduino/arduino-cli/commands/monitor"
+	"github.com/arduino/arduino-cli/i18n"
+	rpc "github.com/arduino/arduino-cli/rpc/cc/arduino/cli/commands/v1"
+	"github.com/arduino/arduino-cli/table"
+	"github.com/fatih/color"
+	"github.com/spf13/cobra"
+)
+
+var tr = i18n.Tr
+
+var portArgs arguments.Port
+var describe bool
+
+// NewCommand created a new `monitor` command
+func NewCommand() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "monitor",
+		Short: tr("Open a communication port with a board."),
+		Long:  tr("Open a communication port with a board."),
+		Example: "" +
+			"  " + os.Args[0] + " monitor -p /dev/ttyACM0\n" +
+			"  " + os.Args[0] + " monitor -p /dev/ttyACM0 --describe",
+		Run: runMonitorCmd,
+	}
+	portArgs.AddToCommand(cmd)
+	cmd.Flags().BoolVar(&describe, "describe", false, tr("Show all the settings of the communication port."))
+	cmd.MarkFlagRequired("port")
+	return cmd
+}
+
+func runMonitorCmd(cmd *cobra.Command, args []string) {
+	instance := instance.CreateAndInit()
+
+	port, err := portArgs.GetPort(instance, nil)
+	if err != nil {
+		feedback.Error(err)
+		os.Exit(errorcodes.ErrGeneric)
+	}
+
+	if describe {
+		res, err := monitor.EnumerateMonitorPortSettings(context.Background(), &rpc.EnumerateMonitorPortSettingsRequest{
+			Instance: instance,
+			Port:     port.ToRPC(),
+			Fqbn:     "",
+		})
+		if err != nil {
+			feedback.Error(tr("Error getting port settings details: %s"), err)
+			os.Exit(errorcodes.ErrGeneric)
+		}
+		feedback.PrintResult(&detailsResult{Settings: res.Settings})
+		return
+	}
+
+	feedback.Error("Monitor functionality not yet implemented")
+	os.Exit(errorcodes.ErrGeneric)
+}
+
+type detailsResult struct {
+	Settings []*rpc.MonitorPortSettingDescriptor `json:"settings"`
+}
+
+func (r *detailsResult) Data() interface{} {
+	return r
+}
+
+func (r *detailsResult) String() string {
+	t := table.New()
+	green := color.New(color.FgGreen)
+	t.SetHeader(tr("ID"), tr("Setting"), tr("Default"), tr("Values"))
+	sort.Slice(r.Settings, func(i, j int) bool {
+		return r.Settings[i].Label < r.Settings[j].Label
+	})
+	for _, setting := range r.Settings {
+		values := strings.Join(setting.EnumValues, ", ")
+		t.AddRow(setting.SettingId, setting.Label, table.NewCell(setting.Value, green), values)
+	}
+	return t.Render()
+}

Diff for: commands/daemon/daemon.go

@@ -26,6 +26,7 @@ import (
 	"github.com/arduino/arduino-cli/commands/compile"
 	"github.com/arduino/arduino-cli/commands/core"
 	"github.com/arduino/arduino-cli/commands/lib"
+	"github.com/arduino/arduino-cli/commands/monitor"
 	"github.com/arduino/arduino-cli/commands/sketch"
 	"github.com/arduino/arduino-cli/commands/upload"
 	"github.com/arduino/arduino-cli/i18n"
@@ -467,8 +468,9 @@ func (s *ArduinoCoreServerImpl) GitLibraryInstall(req *rpc.GitLibraryInstallRequ
 }
 
 // EnumerateMonitorPortSettings FIXMEDOC
-func (s *ArduinoCoreServerImpl) EnumerateMonitorPortSettings(context.Context, *rpc.EnumerateMonitorPortSettingsRequest) (*rpc.EnumerateMonitorPortSettingsResponse, error) {
-	return nil, status.New(codes.Unimplemented, "Not implemented").Err()
+func (s *ArduinoCoreServerImpl) EnumerateMonitorPortSettings(ctx context.Context, req *rpc.EnumerateMonitorPortSettingsRequest) (*rpc.EnumerateMonitorPortSettingsResponse, error) {
+	resp, err := monitor.EnumerateMonitorPortSettings(ctx, req)
+	return resp, convertErrorToRPCStatus(err)
 }
 
 // Monitor FIXMEDOC

Diff for: commands/errors.go

@@ -162,6 +162,32 @@ func (e *MissingPortProtocolError) ToRPCStatus() *status.Status {
 	return status.New(codes.InvalidArgument, e.Error())
 }
 
+// MissingPortError is returned when the port is mandatory and not specified
+type MissingPortError struct{}
+
+func (e *MissingPortError) Error() string {
+	return tr("Missing port")
+}
+
+// ToRPCStatus converts the error into a *status.Status
+func (e *MissingPortError) ToRPCStatus() *status.Status {
+	return status.New(codes.InvalidArgument, e.Error())
+}
+
+// NoMonitorAvailableForProtocolError is returned when a monitor for the specified port protocol is not available
+type NoMonitorAvailableForProtocolError struct {
+	Protocol string
+}
+
+func (e *NoMonitorAvailableForProtocolError) Error() string {
+	return tr("No monitor available for the port protocol %s", e.Protocol)
+}
+
+// ToRPCStatus converts the error into a *status.Status
+func (e *NoMonitorAvailableForProtocolError) ToRPCStatus() *status.Status {
+	return status.New(codes.InvalidArgument, e.Error())
+}
+
 // MissingProgrammerError is returned when the programmer is mandatory and not specified
 type MissingProgrammerError struct{}
 
@@ -208,6 +234,25 @@ func (e *ProgrammerNotFoundError) ToRPCStatus() *status.Status {
 	return status.New(codes.NotFound, e.Error())
 }
 
+// MonitorNotFoundError is returned when the pluggable monitor is not found
+type MonitorNotFoundError struct {
+	Monitor string
+	Cause   error
+}
+
+func (e *MonitorNotFoundError) Error() string {
+	return composeErrorMsg(tr("Monitor '%s' not found", e.Monitor), e.Cause)
+}
+
+func (e *MonitorNotFoundError) Unwrap() error {
+	return e.Cause
+}
+
+// ToRPCStatus converts the error into a *status.Status
+func (e *MonitorNotFoundError) ToRPCStatus() *status.Status {
+	return status.New(codes.NotFound, e.Error())
+}
+
 // InvalidPlatformPropertyError is returned when a property in the platform is not valid
 type InvalidPlatformPropertyError struct {
 	Property string
@@ -454,6 +499,24 @@ func (e *FailedDebugError) ToRPCStatus() *status.Status {
 	return status.New(codes.Internal, e.Error())
 }
 
+// FailedMonitorError is returned when opening the monitor port of a board fails
+type FailedMonitorError struct {
+	Cause error
+}
+
+func (e *FailedMonitorError) Error() string {
+	return composeErrorMsg(tr("Port monitor error"), e.Cause)
+}
+
+func (e *FailedMonitorError) Unwrap() error {
+	return e.Cause
+}
+
+// ToRPCStatus converts the error into a *status.Status
+func (e *FailedMonitorError) ToRPCStatus() *status.Status {
+	return status.New(codes.Internal, e.Error())
+}
+
 // CompileFailedError is returned when the compile fails
 type CompileFailedError struct {
 	Message string

Diff for: commands/monitor/monitor.go

@@ -0,0 +1,57 @@
+// This file is part of arduino-cli.
+//
+// Copyright 2020 ARDUINO SA (http://www.arduino.cc/)
+//
+// This software is released under the GNU General Public License version 3,
+// which covers the main part of arduino-cli.
+// The terms of this license can be found at:
+// https://www.gnu.org/licenses/gpl-3.0.en.html
+//
+// You can be released from the requirements of the above licenses by purchasing
+// a commercial license. Buying such a license is mandatory if you want to
+// modify or otherwise use the software for commercial activities involving the
+// Arduino software without disclosing the source code of your own applications.
+// To purchase a commercial license, send an email to [email protected].
+
+package monitor
+
+import (
+	"github.com/arduino/arduino-cli/arduino/cores"
+	"github.com/arduino/arduino-cli/arduino/cores/packagemanager"
+	"github.com/arduino/arduino-cli/commands"
+	rpc "github.com/arduino/arduino-cli/rpc/cc/arduino/cli/commands/v1"
+)
+
+func findMonitorForProtocolAndBoard(pm *packagemanager.PackageManager, port *rpc.Port, fqbn string) (*cores.MonitorDependency, error) {
+	if port == nil {
+		return nil, &commands.MissingPortError{}
+	}
+	protocol := port.GetProtocol()
+	if protocol == "" {
+		return nil, &commands.MissingPortProtocolError{}
+	}
+
+	// If a board is specified search the monitor in the board package first
+	if fqbn != "" {
+		fqbn, err := cores.ParseFQBN(fqbn)
+		if err != nil {
+			return nil, &commands.InvalidFQBNError{Cause: err}
+		}
+
+		_, boardPlatform, _, _, _, err := pm.ResolveFQBN(fqbn)
+		if err != nil {
+			return nil, &commands.UnknownFQBNError{Cause: err}
+		}
+		if mon, ok := boardPlatform.Monitors[protocol]; ok {
+			return mon, nil
+		}
+	}
+
+	// Otherwise look in all package for a suitable monitor
+	for _, platformRel := range pm.InstalledPlatformReleases() {
+		if mon, ok := platformRel.Monitors[protocol]; ok {
+			return mon, nil
+		}
+	}
+	return nil, &commands.NoMonitorAvailableForProtocolError{Protocol: protocol}
+}

Diff for: commands/monitor/settings.go

@@ -0,0 +1,69 @@
+// This file is part of arduino-cli.
+//
+// Copyright 2020 ARDUINO SA (http://www.arduino.cc/)
+//
+// This software is released under the GNU General Public License version 3,
+// which covers the main part of arduino-cli.
+// The terms of this license can be found at:
+// https://www.gnu.org/licenses/gpl-3.0.en.html
+//
+// You can be released from the requirements of the above licenses by purchasing
+// a commercial license. Buying such a license is mandatory if you want to
+// modify or otherwise use the software for commercial activities involving the
+// Arduino software without disclosing the source code of your own applications.
+// To purchase a commercial license, send an email to [email protected].
+
+package monitor
+
+import (
+	"context"
+
+	pluggableMonitor "github.com/arduino/arduino-cli/arduino/monitor"
+	"github.com/arduino/arduino-cli/commands"
+	rpc "github.com/arduino/arduino-cli/rpc/cc/arduino/cli/commands/v1"
+)
+
+// EnumerateMonitorPortSettings returns a description of the configuration settings of a monitor port
+func EnumerateMonitorPortSettings(ctx context.Context, req *rpc.EnumerateMonitorPortSettingsRequest) (*rpc.EnumerateMonitorPortSettingsResponse, error) {
+	pm := commands.GetPackageManager(req.GetInstance().GetId())
+	if pm == nil {
+		return nil, &commands.InvalidInstanceError{}
+	}
+
+	monitorRef, err := findMonitorForProtocolAndBoard(pm, req.GetPort(), req.GetFqbn())
+	if err != nil {
+		return nil, err
+	}
+
+	tool := pm.FindMonitorDependency(monitorRef)
+	if tool == nil {
+		return nil, &commands.MonitorNotFoundError{Monitor: monitorRef.String()}
+	}
+
+	m := pluggableMonitor.New(monitorRef.Name, tool.InstallDir.Join(monitorRef.Name).String())
+
+	if err := m.Run(); err != nil {
+		return nil, &commands.FailedMonitorError{Cause: err}
+	}
+	defer m.Quit()
+
+	desc, err := m.Describe()
+	if err != nil {
+		return nil, &commands.FailedMonitorError{Cause: err}
+	}
+	return &rpc.EnumerateMonitorPortSettingsResponse{Settings: convert(desc)}, nil
+}
+
+func convert(desc *pluggableMonitor.PortDescriptor) []*rpc.MonitorPortSettingDescriptor {
+	res := []*rpc.MonitorPortSettingDescriptor{}
+	for settingID, descriptor := range desc.ConfigurationParameters {
+		res = append(res, &rpc.MonitorPortSettingDescriptor{
+			SettingId:  settingID,
+			Label:      descriptor.Label,
+			Type:       descriptor.Type,
+			EnumValues: descriptor.Values,
+			Value:      descriptor.Selected,
+		})
+	}
+	return res
+}