introduce the Result struct returnedby the proprocessing funcs

internal/arduino/builder/compilation.go

@@ -167,8 +167,8 @@ func (b *Builder) compileFileWithRecipe(
 
 		// Parse the output of the compiler to gather errors and warnings...
 		if b.diagnosticsManager != nil {
-			b.diagnosticsManager.ParseOutput(command.GetArgs(), commandStdout.Bytes())
-			b.diagnosticsManager.ParseOutput(command.GetArgs(), commandStderr.Bytes())
+			b.diagnosticsManager.Parse(command.GetArgs(), commandStdout.Bytes())
+			b.diagnosticsManager.Parse(command.GetArgs(), commandStderr.Bytes())
 		}
 
 		// ...and then return the error

internal/arduino/builder/internal/detector/detector.go

@@ -341,7 +341,7 @@ func (l *SketchLibrariesDetector) findIncludesUntilDone(
 		}
 
 		var preprocErr error
-		var preprocStderr []byte
+		var preprocFirstResult preprocessor.Result
 
 		var missingIncludeH string
 		if unchanged && cache.valid {
@@ -350,21 +350,20 @@ func (l *SketchLibrariesDetector) findIncludesUntilDone(
 				l.logger.Info(tr("Using cached library dependencies for file: %[1]s", sourcePath))
 			}
 		} else {
-			var preprocStdout []byte
-			preprocStdout, preprocStderr, preprocErr = preprocessor.GCC(sourcePath, targetFilePath, includeFolders, buildProperties, l.diagnosticManager)
+			preprocFirstResult, preprocErr = preprocessor.GCC(sourcePath, targetFilePath, includeFolders, buildProperties)
 			if l.logger.Verbose() {
-				l.logger.WriteStdout(preprocStdout)
+				l.logger.WriteStdout(preprocFirstResult.Stdout())
 			}
 			// Unwrap error and see if it is an ExitError.
 			var exitErr *exec.ExitError
 			if preprocErr == nil {
 				// Preprocessor successful, done
 				missingIncludeH = ""
-			} else if isExitErr := errors.As(preprocErr, &exitErr); !isExitErr || preprocStderr == nil {
+			} else if isExitErr := errors.As(preprocErr, &exitErr); !isExitErr || preprocFirstResult.Stderr() == nil {
 				// Ignore ExitErrors (e.g. gcc returning non-zero status), but bail out on other errors
 				return preprocErr
 			} else {
-				missingIncludeH = IncludesFinderWithRegExp(string(preprocStderr))
+				missingIncludeH = IncludesFinderWithRegExp(string(preprocFirstResult.Stderr()))
 				if missingIncludeH == "" && l.logger.Verbose() {
 					l.logger.Info(tr("Error while detecting libraries included by %[1]s", sourcePath))
 				}
@@ -380,22 +379,25 @@ func (l *SketchLibrariesDetector) findIncludesUntilDone(
 		library := l.resolveLibrary(missingIncludeH, platformArch)
 		if library == nil {
 			// Library could not be resolved, show error
-			if preprocErr == nil || preprocStderr == nil {
+			if preprocErr == nil || preprocFirstResult.Stderr() == nil {
 				// Filename came from cache, so run preprocessor to obtain error to show
-				var preprocStdout []byte
-				preprocStdout, preprocStderr, preprocErr = preprocessor.GCC(sourcePath, targetFilePath, includeFolders, buildProperties, l.diagnosticManager)
+				result, err := preprocessor.GCC(sourcePath, targetFilePath, includeFolders, buildProperties)
 				if l.logger.Verbose() {
-					l.logger.WriteStdout(preprocStdout)
+					l.logger.WriteStdout(result.Stdout())
 				}
-				if preprocErr == nil {
+				if err == nil {
 					// If there is a missing #include in the cache, but running
 					// gcc does not reproduce that, there is something wrong.
 					// Returning an error here will cause the cache to be
 					// deleted, so hopefully the next compilation will succeed.
 					return errors.New(tr("Internal error in cache"))
 				}
+				l.diagnosticManager.Parse(result.Args(), result.Stderr())
+				l.logger.WriteStderr(result.Stderr())
+				return err
 			}
-			l.logger.WriteStderr(preprocStderr)
+			l.diagnosticManager.Parse(preprocFirstResult.Args(), preprocFirstResult.Stderr())
+			l.logger.WriteStderr(preprocFirstResult.Stderr())
 			return preprocErr
 		}
 

internal/arduino/builder/internal/preprocessor/arduino_preprocessor.go

@@ -22,7 +22,6 @@ import (
 	"path/filepath"
 	"runtime"
 
-	"github.com/arduino/arduino-cli/internal/arduino/builder/internal/diagnosticmanager"
 	"github.com/arduino/arduino-cli/internal/arduino/builder/internal/utils"
 	"github.com/arduino/arduino-cli/internal/arduino/sketch"
 	"github.com/arduino/go-paths-helper"
@@ -34,21 +33,20 @@ import (
 func PreprocessSketchWithArduinoPreprocessor(
 	sk *sketch.Sketch, buildPath *paths.Path, includeFolders paths.PathList,
 	lineOffset int, buildProperties *properties.Map, onlyUpdateCompilationDatabase bool,
-	diagnosticmanager *diagnosticmanager.Manager,
-) ([]byte, []byte, error) {
+) (Result, error) {
 	verboseOut := &bytes.Buffer{}
 	normalOut := &bytes.Buffer{}
 	if err := buildPath.Join("preproc").MkdirAll(); err != nil {
-		return nil, nil, err
+		return Result{}, err
 	}
 
 	sourceFile := buildPath.Join("sketch", sk.MainFile.Base()+".cpp")
 	targetFile := buildPath.Join("preproc", "sketch_merged.cpp")
-	gccStdout, gccStderr, err := GCC(sourceFile, targetFile, includeFolders, buildProperties, diagnosticmanager)
-	verboseOut.Write(gccStdout)
-	verboseOut.Write(gccStderr)
+	gccResult, err := GCC(sourceFile, targetFile, includeFolders, buildProperties)
+	verboseOut.Write(gccResult.Stdout())
+	verboseOut.Write(gccResult.Stderr())
 	if err != nil {
-		return nil, nil, err
+		return Result{}, err
 	}
 
 	arduiniPreprocessorProperties := properties.NewMap()
@@ -61,18 +59,18 @@ func PreprocessSketchWithArduinoPreprocessor(
 	arduiniPreprocessorProperties.SetPath("source_file", targetFile)
 	pattern := arduiniPreprocessorProperties.Get("pattern")
 	if pattern == "" {
-		return nil, nil, errors.New(tr("arduino-preprocessor pattern is missing"))
+		return Result{}, errors.New(tr("arduino-preprocessor pattern is missing"))
 	}
 
 	commandLine := arduiniPreprocessorProperties.ExpandPropsInString(pattern)
 	parts, err := properties.SplitQuotedString(commandLine, `"'`, false)
 	if err != nil {
-		return nil, nil, err
+		return Result{}, err
 	}
 
 	command, err := paths.NewProcess(nil, parts...)
 	if err != nil {
-		return nil, nil, err
+		return Result{}, err
 	}
 	if runtime.GOOS == "windows" {
 		// chdir in the uppermost directory to avoid UTF-8 bug in clang (https://github.com/arduino/arduino-preprocessor/issues/2)
@@ -83,14 +81,13 @@ func PreprocessSketchWithArduinoPreprocessor(
 	commandStdOut, commandStdErr, err := command.RunAndCaptureOutput(context.Background())
 	verboseOut.Write(commandStdErr)
 	if err != nil {
-		return normalOut.Bytes(), verboseOut.Bytes(), err
+		return Result{args: gccResult.Args(), stdout: verboseOut.Bytes(), stderr: normalOut.Bytes()}, err
 	}
 	result := utils.NormalizeUTF8(commandStdOut)
 
 	destFile := buildPath.Join(sk.MainFile.Base() + ".cpp")
 	if err := destFile.WriteFile(result); err != nil {
-		return normalOut.Bytes(), verboseOut.Bytes(), err
+		return Result{args: gccResult.Args(), stdout: verboseOut.Bytes(), stderr: normalOut.Bytes()}, err
 	}
-
-	return normalOut.Bytes(), verboseOut.Bytes(), err
+	return Result{args: gccResult.Args(), stdout: verboseOut.Bytes(), stderr: normalOut.Bytes()}, err
 }

internal/arduino/builder/internal/preprocessor/ctags.go

@@ -26,7 +26,6 @@ import (
 	"strings"
 
 	"github.com/arduino/arduino-cli/internal/arduino/builder/cpp"
-	"github.com/arduino/arduino-cli/internal/arduino/builder/internal/diagnosticmanager"
 	"github.com/arduino/arduino-cli/internal/arduino/builder/internal/preprocessor/internal/ctags"
 	"github.com/arduino/arduino-cli/internal/arduino/sketch"
 	"github.com/arduino/arduino-cli/internal/i18n"
@@ -44,12 +43,11 @@ var DebugPreprocessor bool
 func PreprocessSketchWithCtags(
 	sketch *sketch.Sketch, buildPath *paths.Path, includes paths.PathList,
 	lineOffset int, buildProperties *properties.Map, onlyUpdateCompilationDatabase bool,
-	diagnosticManager *diagnosticmanager.Manager,
-) ([]byte, []byte, error) {
+) (Result, error) {
 	// Create a temporary working directory
 	tmpDir, err := paths.MkTempDir("", "")
 	if err != nil {
-		return nil, nil, err
+		return Result{}, err
 	}
 	defer tmpDir.RemoveAll()
 	ctagsTarget := tmpDir.Join("sketch_merged.cpp")
@@ -59,38 +57,38 @@ func PreprocessSketchWithCtags(
 
 	// Run GCC preprocessor
 	sourceFile := buildPath.Join("sketch", sketch.MainFile.Base()+".cpp")
-	gccStdout, gccStderr, err := GCC(sourceFile, ctagsTarget, includes, buildProperties, diagnosticManager)
-	verboseOutput.Write(gccStdout)
-	verboseOutput.Write(gccStderr)
-	normalOutput.Write(gccStderr)
+	result, err := GCC(sourceFile, ctagsTarget, includes, buildProperties)
+	verboseOutput.Write(result.Stdout())
+	verboseOutput.Write(result.Stderr())
+	normalOutput.Write(result.Stderr())
 	if err != nil {
 		if !onlyUpdateCompilationDatabase {
-			return normalOutput.Bytes(), verboseOutput.Bytes(), err
+			return Result{args: result.Args(), stdout: verboseOutput.Bytes(), stderr: normalOutput.Bytes()}, err
 		}
 
 		// Do not bail out if we are generating the compile commands database
 		normalOutput.WriteString(fmt.Sprintf("%s: %s",
 			tr("An error occurred adding prototypes"),
 			tr("the compilation database may be incomplete or inaccurate")))
 		if err := sourceFile.CopyTo(ctagsTarget); err != nil {
-			return normalOutput.Bytes(), verboseOutput.Bytes(), err
+			return Result{args: result.Args(), stdout: verboseOutput.Bytes(), stderr: normalOutput.Bytes()}, err
 		}
 	}
 
 	if src, err := ctagsTarget.ReadFile(); err == nil {
 		filteredSource := filterSketchSource(sketch, bytes.NewReader(src), false)
 		if err := ctagsTarget.WriteFile([]byte(filteredSource)); err != nil {
-			return normalOutput.Bytes(), verboseOutput.Bytes(), err
+			return Result{args: result.Args(), stdout: verboseOutput.Bytes(), stderr: normalOutput.Bytes()}, err
 		}
 	} else {
-		return normalOutput.Bytes(), verboseOutput.Bytes(), err
+		return Result{args: result.Args(), stdout: verboseOutput.Bytes(), stderr: normalOutput.Bytes()}, err
 	}
 
 	// Run CTags on gcc-preprocessed source
 	ctagsOutput, ctagsStdErr, err := RunCTags(ctagsTarget, buildProperties)
 	verboseOutput.Write(ctagsStdErr)
 	if err != nil {
-		return normalOutput.Bytes(), verboseOutput.Bytes(), err
+		return Result{args: result.Args(), stdout: verboseOutput.Bytes(), stderr: normalOutput.Bytes()}, err
 	}
 
 	// Parse CTags output
@@ -105,13 +103,13 @@ func PreprocessSketchWithCtags(
 	if sourceData, err := sourceFile.ReadFile(); err == nil {
 		source = string(sourceData)
 	} else {
-		return normalOutput.Bytes(), verboseOutput.Bytes(), err
+		return Result{args: result.Args(), stdout: verboseOutput.Bytes(), stderr: normalOutput.Bytes()}, err
 	}
 	source = strings.ReplaceAll(source, "\r\n", "\n")
 	source = strings.ReplaceAll(source, "\r", "\n")
 	sourceRows := strings.Split(source, "\n")
 	if isFirstFunctionOutsideOfSource(firstFunctionLine, sourceRows) {
-		return normalOutput.Bytes(), verboseOutput.Bytes(), nil
+		return Result{args: result.Args(), stdout: verboseOutput.Bytes(), stderr: normalOutput.Bytes()}, nil
 	}
 
 	insertionLine := firstFunctionLine + lineOffset - 1
@@ -137,7 +135,7 @@ func PreprocessSketchWithCtags(
 
 	// Write back arduino-preprocess output to the sourceFile
 	err = sourceFile.WriteFile([]byte(preprocessedSource))
-	return normalOutput.Bytes(), verboseOutput.Bytes(), err
+	return Result{args: result.Args(), stdout: verboseOutput.Bytes(), stderr: normalOutput.Bytes()}, err
 }
 
 func composePrototypeSection(line int, prototypes []*ctags.Prototype) string {

internal/arduino/builder/internal/preprocessor/gcc.go

@@ -23,7 +23,6 @@ import (
 
 	f "github.com/arduino/arduino-cli/internal/algorithms"
 	"github.com/arduino/arduino-cli/internal/arduino/builder/cpp"
-	"github.com/arduino/arduino-cli/internal/arduino/builder/internal/diagnosticmanager"
 	"github.com/arduino/go-paths-helper"
 	"github.com/arduino/go-properties-orderedmap"
 )
@@ -33,8 +32,7 @@ import (
 func GCC(
 	sourceFilePath, targetFilePath *paths.Path,
 	includes paths.PathList, buildProperties *properties.Map,
-	diagnosticManager *diagnosticmanager.Manager,
-) ([]byte, []byte, error) {
+) (Result, error) {
 	gccBuildProperties := properties.NewMap()
 	gccBuildProperties.Set("preproc.macros.flags", "-w -x c++ -E -CC")
 	gccBuildProperties.Merge(buildProperties)
@@ -59,14 +57,14 @@ func GCC(
 
 	pattern := gccBuildProperties.Get(gccPreprocRecipeProperty)
 	if pattern == "" {
-		return nil, nil, errors.New(tr("%s pattern is missing", gccPreprocRecipeProperty))
+		return Result{}, errors.New(tr("%s pattern is missing", gccPreprocRecipeProperty))
 	}
 
 	commandLine := gccBuildProperties.ExpandPropsInString(pattern)
 	commandLine = properties.DeleteUnexpandedPropsFromString(commandLine)
 	args, err := properties.SplitQuotedString(commandLine, `"'`, false)
 	if err != nil {
-		return nil, nil, err
+		return Result{}, err
 	}
 
 	// Remove -MMD argument if present. Leaving it will make gcc try
@@ -75,16 +73,12 @@ func GCC(
 
 	proc, err := paths.NewProcess(nil, args...)
 	if err != nil {
-		return nil, nil, err
+		return Result{}, err
 	}
 	stdout, stderr, err := proc.RunAndCaptureOutput(context.Background())
 
-	if diagnosticManager != nil {
-		diagnosticManager.ParseOutput(proc.GetArgs(), stderr)
-	}
-
 	// Append gcc arguments to stdout
 	stdout = append([]byte(fmt.Sprintln(strings.Join(args, " "))), stdout...)
 
-	return stdout, stderr, err
+	return Result{args: proc.GetArgs(), stdout: stdout, stderr: stderr}, err
 }

internal/arduino/builder/internal/preprocessor/result.go

@@ -0,0 +1,19 @@
+package preprocessor
+
+type Result struct {
+	args   []string
+	stdout []byte
+	stderr []byte
+}
+
+func (r Result) Args() []string {
+	return r.args
+}
+
+func (r Result) Stdout() []byte {
+	return r.stdout
+}
+
+func (r Result) Stderr() []byte {
+	return r.stderr
+}

internal/arduino/builder/preprocess_sketch.go

@@ -23,16 +23,16 @@ import (
 // preprocessSketch fixdoc
 func (b *Builder) preprocessSketch(includes paths.PathList) error {
 	// In the future we might change the preprocessor
-	normalOutput, verboseOutput, err := preprocessor.PreprocessSketchWithCtags(
+	result, err := preprocessor.PreprocessSketchWithCtags(
 		b.sketch, b.buildPath, includes, b.lineOffset,
 		b.buildProperties, b.onlyUpdateCompilationDatabase,
-		b.diagnosticsManager,
 	)
 	if b.logger.Verbose() {
-		b.logger.WriteStdout(verboseOutput)
+		b.logger.WriteStdout(result.Stdout())
 	} else {
-		b.logger.WriteStdout(normalOutput)
+		b.logger.WriteStdout(result.Stderr())
 	}
+	b.diagnosticsManager.Parse(result.Args(), result.Stderr())
 
 	return err
 }