Handle FQBNs provided via sketch.json files in upload/compile commands

Author: federicobond

cli/cli_test.go

@@ -312,7 +312,7 @@ func TestCompileCommandsIntegration(t *testing.T) {
 	// Build sketch without FQBN
 	exitCode, d = executeWithArgs("compile", sketchPath)
 	require.NotZero(t, exitCode)
-	require.Contains(t, string(d), "no FQBN provided")
+	require.Contains(t, string(d), "Error: no FQBN provided. Set --fqbn flag or attach board to sketch")
 
 	// Build sketch for arduino:avr:uno
 	exitCode, d = executeWithArgs("compile", "-b", "arduino:avr:uno", sketchPath)

cli/compile/compile.go

@@ -19,6 +19,8 @@ import (
 	"context"
 	"os"
 
+	"github.com/arduino/arduino-cli/arduino/sketches"
+
 	"github.com/arduino/arduino-cli/cli/feedback"
 
 	"github.com/arduino/arduino-cli/cli/errorcodes"
@@ -94,6 +96,15 @@ func run(cmd *cobra.Command, args []string) {
 	}
 
 	sketchPath := initSketchPath(path)
+	sketch, err := sketches.NewSketchFromPath(sketchPath)
+	if err != nil {
+		feedback.Errorf("Error opening sketch: %v", err)
+		os.Exit(errorcodes.ErrGeneric)
+	}
+	if fqbn == "" && sketch.Metadata.CPU.Fqbn == "" {
+		feedback.Errorf("Error: no FQBN provided. Set --fqbn flag or attach board to sketch")
+		os.Exit(errorcodes.ErrGeneric)
+	}
 
 	_, err = compile.Compile(context.Background(), &rpc.CompileReq{
 		Instance:        inst,

cli/upload/upload.go

@@ -19,6 +19,8 @@ import (
 	"context"
 	"os"
 
+	"github.com/arduino/arduino-cli/arduino/sketches"
+
 	"github.com/arduino/arduino-cli/cli/errorcodes"
 	"github.com/arduino/arduino-cli/cli/feedback"
 	"github.com/arduino/arduino-cli/cli/instance"
@@ -71,8 +73,17 @@ func run(command *cobra.Command, args []string) {
 		path = paths.New(args[0])
 	}
 	sketchPath := initSketchPath(path)
+	sketch, err := sketches.NewSketchFromPath(sketchPath)
+	if err != nil {
+		feedback.Errorf("Error opening sketch: %v", err)
+		os.Exit(errorcodes.ErrGeneric)
+	}
+	if fqbn == "" && sketch.Metadata.CPU.Fqbn == "" {
+		feedback.Errorf("Error: no FQBN provided. Set --fqbn flag or attach board to sketch")
+		os.Exit(errorcodes.ErrGeneric)
+	}
 
-	if _, err := upload.Upload(context.Background(), &rpc.UploadReq{
+	if _, err = upload.Upload(context.Background(), &rpc.UploadReq{
 		Instance:   instance,
 		Fqbn:       fqbn,
 		SketchPath: sketchPath.String(),