Implementation of compile output parser in gRPC command

Author: cmaglie

Diff for: commands/compile/compile.go

@@ -30,6 +30,7 @@ import (
 	"github.com/arduino/arduino-cli/commands"
 	"github.com/arduino/arduino-cli/configuration"
 	"github.com/arduino/arduino-cli/i18n"
+	"github.com/arduino/arduino-cli/internal/builder/diagnostics"
 	"github.com/arduino/arduino-cli/inventory"
 	"github.com/arduino/arduino-cli/legacy/builder"
 	"github.com/arduino/arduino-cli/legacy/builder/types"
@@ -163,7 +164,25 @@ func Compile(ctx context.Context, req *rpc.CompileRequest, outStream, errStream
 		return nil, err
 	}
 
+	var allDiagnostics diagnostics.Diagnostics
+	defer func() {
+		r.Diagnostics = allDiagnostics.ToRPC()
+	}()
+
 	builderCtx := &types.Context{}
+	builderCtx.CompilerOutputParser = func(cmdline []string, out []byte) {
+		compiler := diagnostics.DetectCompilerFromCommandLine(cmdline, false /* at the moment compiler-probing is not required */)
+		if compiler == nil {
+			logrus.Warnf("Could not detect compiler from: %s", cmdline)
+			return
+		}
+		diags, err := diagnostics.ParseCompilerOutput(compiler, out)
+		if err != nil {
+			logrus.Warnf("Error parsing compiler output: %s", err)
+			return
+		}
+		allDiagnostics = append(allDiagnostics, diags...)
+	}
 	builderCtx.PackageManager = pme
 	if pme.GetProfile() != nil {
 		builderCtx.LibrariesManager = lm