Function detectLanguages

operator/controllers/source_controller.go:361–418

detectLanguages identifies programming languages used in the repository.

(localPath string)

// detectLanguages identifies programming languages used in the repository.
func detectLanguages(localPath string) []string {
	extensions := map[string]string{
		".go":    "Go",
		".java":  "Java",
		".py":    "Python",
		".js":    "JavaScript",
		".ts":    "TypeScript",
		".rs":    "Rust",
		".rb":    "Ruby",
		".php":   "PHP",
		".cs":    "C#",
		".cpp":   "C++",
		".c":     "C",
		".swift": "Swift",
		".kt":    "Kotlin",
		".scala": "Scala",
	}

	langCount := make(map[string]int)
	// Walk errors mean a partially indexed tree — acceptable for language
	// detection, which is advisory.
	_ = filepath.Walk(localPath, func(path string, info os.FileInfo, err error) error {
		if err != nil || info.IsDir() {
			// Skip hidden directories and vendor/node_modules
			if info != nil && info.IsDir() {
				base := filepath.Base(path)
				if strings.HasPrefix(base, ".") || base == "vendor" || base == "node_modules" {
					return filepath.SkipDir
				}
			}
			return nil
		}
		ext := filepath.Ext(path)
		if lang, ok := extensions[ext]; ok {
			langCount[lang]++
		}
		return nil
	})

	type langEntry struct {
		name  string
		count int
	}
	sorted := make([]langEntry, 0, len(langCount))
	for name, count := range langCount {
		sorted = append(sorted, langEntry{name, count})
	}
	sort.Slice(sorted, func(i, j int) bool { return sorted[i].count > sorted[j].count })

	result := make([]string, 0, 5)
	for i, e := range sorted {
		if i >= 5 {
			break
		}
		result = append(result, e.name)
	}
	return result
}