feat: filter boards by fqbn in connected list

arduino/cores/fqbn.go

@@ -76,6 +76,29 @@ func (fqbn *FQBN) String() string {
 	return res
 }
 
+// Match check if the target FQBN corresponds to the receiver one.
+// The core parts are checked for exact equality while board options are loosely
+// matched: the set of boards options of the target must be fully contained within
+// the one of the receiver and their values must be equal.
+func (fqbn *FQBN) Match(target *FQBN) bool {
+	if fqbn.StringWithoutConfig() != target.StringWithoutConfig() {
+		return false
+	}
+	searchedProperties := target.Configs.Clone()
+	actualConfigs := fqbn.Configs.AsMap()
+	for neededKey, neededValue := range searchedProperties.AsMap() {
+		targetValue, hasKey := actualConfigs[neededKey]
+		if !hasKey {
+			return false
+		}
+		if targetValue != neededValue {
+			return false
+		}
+	}
+
+	return true
+}
+
 // StringWithoutConfig returns the FQBN without the Config part
 func (fqbn *FQBN) StringWithoutConfig() string {
 	return fqbn.Package + ":" + fqbn.PlatformArch + ":" + fqbn.BoardID

arduino/cores/fqbn_test.go

@@ -121,3 +121,37 @@ func TestFQBN(t *testing.T) {
 		"properties.Map{\n  \"cpu\": \"atmega\",\n  \"speed\": \"1000\",\n  \"extra\": \"core=arduino\",\n}",
 		f.Configs.Dump())
 }
+
+func TestMatch(t *testing.T) {
+	expectedMatches := [][]string{
+		{"arduino:avr:uno", "arduino:avr:uno"},
+		{"arduino:avr:uno", "arduino:avr:uno:opt1=1,opt2=2"},
+		{"arduino:avr:uno:opt1=1", "arduino:avr:uno:opt1=1,opt2=2"},
+		{"arduino:avr:uno:opt1=1,opt2=2", "arduino:avr:uno:opt1=1,opt2=2"},
+		{"arduino:avr:uno:opt3=3,opt1=1,opt2=2", "arduino:avr:uno:opt2=2,opt3=3,opt1=1,opt4=4"},
+	}
+
+	for _, pair := range expectedMatches {
+		a, err := ParseFQBN(pair[0])
+		require.NoError(t, err)
+		b, err := ParseFQBN(pair[1])
+		require.NoError(t, err)
+		require.True(t, b.Match(a))
+	}
+
+	expectedMismatches := [][]string{
+		{"arduino:avr:uno", "arduino:avr:due"},
+		{"arduino:avr:uno", "arduino:avr:due:opt1=1,opt2=2"},
+		{"arduino:avr:uno:opt1=1", "arduino:avr:uno"},
+		{"arduino:avr:uno:opt1=1,opt2=", "arduino:avr:uno:opt1=1,opt2=3"},
+		{"arduino:avr:uno:opt1=1,opt2=2", "arduino:avr:uno:opt2=2"},
+	}
+
+	for _, pair := range expectedMismatches {
+		a, err := ParseFQBN(pair[0])
+		require.NoError(t, err)
+		b, err := ParseFQBN(pair[1])
+		require.NoError(t, err)
+		require.False(t, b.Match(a))
+	}
+}

commands/board/list.go

@@ -205,6 +205,15 @@ func List(req *rpc.BoardListRequest) (r []*rpc.DetectedPort, discoveryStartError
 	}
 	defer release()
 
+	var fqbnFilter *cores.FQBN
+	if f := req.GetFqbn(); f != "" {
+		var err error
+		fqbnFilter, err = cores.ParseFQBN(f)
+		if err != nil {
+			return nil, nil, &arduino.InvalidFQBNError{Cause: err}
+		}
+	}
+
 	dm := pme.DiscoveryManager()
 	discoveryStartErrors = dm.Start()
 	time.Sleep(time.Duration(req.GetTimeout()) * time.Millisecond)
@@ -222,11 +231,27 @@ func List(req *rpc.BoardListRequest) (r []*rpc.DetectedPort, discoveryStartError
 			Port:           port.ToRPC(),
 			MatchingBoards: boards,
 		}
-		retVal = append(retVal, b)
+
+		if fqbnFilter == nil || hasMatchingBoard(b, fqbnFilter) {
+			retVal = append(retVal, b)
+		}
 	}
 	return retVal, discoveryStartErrors, nil
 }
 
+func hasMatchingBoard(b *rpc.DetectedPort, fqbnFilter *cores.FQBN) bool {
+	for _, detectedBoard := range b.MatchingBoards {
+		detectedFqbn, err := cores.ParseFQBN(detectedBoard.Fqbn)
+		if err != nil {
+			continue
+		}
+		if detectedFqbn.Match(fqbnFilter) {
+			return true
+		}
+	}
+	return false
+}
+
 // Watch returns a channel that receives boards connection and disconnection events.
 // It also returns a callback function that must be used to stop and dispose the watch.
 func Watch(req *rpc.BoardListWatchRequest) (<-chan *rpc.BoardListWatchResponse, func(), error) {

internal/cli/board/list.go

@@ -16,10 +16,12 @@
 package board
 
 import (
+	"errors"
 	"fmt"
 	"os"
 	"sort"
 
+	"github.com/arduino/arduino-cli/arduino"
 	"github.com/arduino/arduino-cli/arduino/cores"
 	"github.com/arduino/arduino-cli/commands/board"
 	"github.com/arduino/arduino-cli/internal/cli/arguments"
@@ -47,6 +49,7 @@ func initListCommand() *cobra.Command {
 	}
 
 	timeoutArg.AddToCommand(listCommand)
+	fqbn.AddToCommand(listCommand)
 	listCommand.Flags().BoolVarP(&watch, "watch", "w", false, tr("Command keeps running and prints list of connected boards whenever there is a change."))
 
 	return listCommand
@@ -63,14 +66,19 @@ func runListCommand(cmd *cobra.Command, args []string) {
 		return
 	}
 
-	ports, discvoeryErrors, err := board.List(&rpc.BoardListRequest{
+	ports, discoveryErrors, err := board.List(&rpc.BoardListRequest{
 		Instance: inst,
 		Timeout:  timeoutArg.Get().Milliseconds(),
+		Fqbn:     fqbn.String(),
 	})
+	var invalidFQBNErr *arduino.InvalidFQBNError
+	if errors.As(err, &invalidFQBNErr) {
+		feedback.Fatal(tr(err.Error()), feedback.ErrBadArgument)
+	}
 	if err != nil {
 		feedback.Warning(tr("Error detecting boards: %v", err))
 	}
-	for _, err := range discvoeryErrors {
+	for _, err := range discoveryErrors {
 		feedback.Warning(tr("Error starting discovery: %v", err))
 	}
 	feedback.PrintResult(result{ports})

internal/integrationtest/board/board_test.go

@@ -91,6 +91,39 @@ func TestBoardList(t *testing.T) {
 		MustBeEmpty()
 }
 
+func TestBoardListWithFqbnFilter(t *testing.T) {
+	if os.Getenv("CI") != "" {
+		t.Skip("VMs have no serial ports")
+	}
+
+	env, cli := integrationtest.CreateArduinoCLIWithEnvironment(t)
+	defer env.CleanUp()
+
+	_, _, err := cli.Run("core", "update-index")
+	require.NoError(t, err)
+	stdout, _, err := cli.Run("board", "list", "-b", "foo:bar:baz", "--format", "json")
+	require.NoError(t, err)
+	// this is a bit of a passpartout test, it actually filters the "bluetooth boards" locally
+	// but it would succeed even if the filtering wasn't working properly
+	// TODO: find a way to simulate connected boards or create a unit test which
+	// mocks or initializes multiple components
+	requirejson.Parse(t, stdout).
+		MustBeEmpty()
+}
+
+func TestBoardListWithFqbnFilterInvalid(t *testing.T) {
+	if os.Getenv("CI") != "" {
+		t.Skip("VMs have no serial ports")
+	}
+
+	env, cli := integrationtest.CreateArduinoCLIWithEnvironment(t)
+	defer env.CleanUp()
+
+	_, stderr, err := cli.Run("board", "list", "-b", "yadayada", "--format", "json")
+	require.Error(t, err)
+	requirejson.Query(t, stderr, ".error", `"Invalid FQBN: not an FQBN: yadayada"`)
+}
+
 func TestBoardListWithInvalidDiscovery(t *testing.T) {
 	env, cli := integrationtest.CreateArduinoCLIWithEnvironment(t)
 	defer env.CleanUp()