Function resolveNodeEntry

cmd/pulumi.go:1198–1226

resolveNodeEntry finds the TypeScript/JavaScript entry point for a Node.js Pulumi project. It checks package.json "main" first, then falls back to index.ts / index.js.

(dir string)

// resolveNodeEntry finds the TypeScript/JavaScript entry point for a Node.js Pulumi project.
// It checks package.json "main" first, then falls back to index.ts / index.js.
func resolveNodeEntry(dir string) (string, error) {
	// Try to read main from package.json
	pkgData, err := os.ReadFile(filepath.Join(dir, "package.json"))
	if err == nil {
		var pkg struct {
			Main string `json:"main"`
		}
		if jsonErr := json.Unmarshal(pkgData, &pkg); jsonErr == nil && pkg.Main != "" {
			// If main points to a .js file, check for a sibling .ts file first
			// (the .ts is the source; .js would only exist after tsc).
			mainPath := filepath.Join(dir, pkg.Main)
			tsVariant := strings.TrimSuffix(mainPath, ".js") + ".ts"
			if _, err := os.Stat(tsVariant); err == nil {
				return tsVariant, nil
			}
			if _, err := os.Stat(mainPath); err == nil {
				return mainPath, nil
			}
		}
	}
	// Fall back to index.ts, then index.js
	for _, candidate := range []string{"index.ts", "index.js"} {
		p := filepath.Join(dir, candidate)
		if _, err := os.Stat(p); err == nil {
			return p, nil
		}
	}
	return "", fmt.Errorf("could not find a Node.js entry point in %s (tried package.json main, index.ts, index.js)", dir)
}

// prependPath returns a copy of env with the given directory prepended to PATH.
func prependPath(env []string, dir string) []string {