detectLanguagesFromFiles does a quick scan for language signals. Checks manifest files first (fast), then scans source files recursively.
(root string)
| 253 | // detectLanguagesFromFiles does a quick scan for language signals. |
| 254 | // Checks manifest files first (fast), then scans source files recursively. |
| 255 | func detectLanguagesFromFiles(root string) map[string]bool { |
| 256 | langs := make(map[string]bool) |
| 257 | addLang := func(lang string) { |
| 258 | if lang != "" { |
| 259 | langs[lang] = true |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | // Manifest files → definitive language signal |
| 264 | manifests := map[string][]string{ |
| 265 | "go.mod": {"go"}, |
| 266 | "package.json": {"javascript"}, |
| 267 | "Cargo.toml": {"rust"}, |
| 268 | "pyproject.toml": {"python"}, |
| 269 | "setup.py": {"python"}, |
| 270 | "requirements.txt": {"python"}, |
| 271 | "Gemfile": {"ruby"}, |
| 272 | "build.gradle": {"java"}, |
| 273 | "build.gradle.kts": {"kotlin", "java"}, |
| 274 | "pom.xml": {"java"}, |
| 275 | "Package.swift": {"swift"}, |
| 276 | "Podfile": {"swift"}, |
| 277 | "mix.exs": {"elixir"}, |
| 278 | "composer.json": {"php"}, |
| 279 | "build.sbt": {"scala"}, |
| 280 | "tsconfig.json": {"typescript"}, |
| 281 | } |
| 282 | for file, signalLangs := range manifests { |
| 283 | if _, err := os.Stat(filepath.Join(root, file)); err == nil { |
| 284 | for _, lang := range signalLangs { |
| 285 | addLang(lang) |
| 286 | } |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | // C# project files can have arbitrary names; detect by glob at repo root. |
| 291 | for _, pattern := range []string{"*.csproj", "*.sln"} { |
| 292 | matches, _ := filepath.Glob(filepath.Join(root, pattern)) |
| 293 | if len(matches) > 0 { |
| 294 | addLang("csharp") |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | // JS/TS monorepo signal: packages/*/package.json. |
| 299 | if matches, _ := filepath.Glob(filepath.Join(root, "packages", "*", "package.json")); len(matches) > 0 { |
| 300 | addLang("javascript") |
| 301 | } |
| 302 | |
| 303 | // Makefile heuristics for C/C++ projects — check directly, no sentinel. |
| 304 | if _, err := os.Stat(filepath.Join(root, "Makefile")); err == nil { |
| 305 | applyMakefileHeuristics(filepath.Join(root, "Makefile"), addLang) |
| 306 | } |
| 307 | |
| 308 | // Include subdirectory source files. Reuse the scan result for countSourceFiles too. |
| 309 | gitCache := scanner.NewGitIgnoreCache(root) |
| 310 | if files, err := scanner.ScanFiles(root, gitCache, nil, nil); err == nil { |
| 311 | for _, f := range files { |
| 312 | addLang(scanner.DetectLanguage(f.Path)) |