Method GetSourceFileFromReference

internal/compiler/program.go:231–272

** This should have similar behavior to 'processSourceFile' without diagnostics or mutation. */

(origin *ast.SourceFile, ref *ast.FileReference)

/** This should have similar behavior to 'processSourceFile' without diagnostics or mutation. */
func (p *Program) GetSourceFileFromReference(origin *ast.SourceFile, ref *ast.FileReference) *ast.SourceFile {
	// TODO: The module loader in corsa is fairly different than strada, it should probably be able to expose this functionality at some point,
	// rather than redoing the logic approximately here, since most of the related logic now lives in module.Resolver
	// Still, without the failed lookup reporting that only the loader does, this isn't terribly complicated

	fileName := tspath.ResolvePath(tspath.GetDirectoryPath(origin.FileName()), ref.FileName)
	supportedExtensionsBase := tsoptions.GetSupportedExtensions(p.Options(), nil /*extraFileExtensions*/)
	supportedExtensions := tsoptions.GetSupportedExtensionsWithJsonIfResolveJsonModule(p.Options(), supportedExtensionsBase)
	allowNonTsExtensions := p.Options().AllowNonTsExtensions.IsTrue()
	if tspath.HasExtension(fileName) {
		if !allowNonTsExtensions {
			canonicalFileName := tspath.GetCanonicalFileName(fileName, p.UseCaseSensitiveFileNames())
			supported := false
			for _, group := range supportedExtensions {
				if tspath.FileExtensionIsOneOf(canonicalFileName, group) {
					supported = true
					break
				}
			}
			if !supported {
				return nil // unsupported extensions are forced to fail
			}
		}

		return p.GetSourceFileForResolvedModule(fileName)
	}
	if allowNonTsExtensions {
		extensionless := p.GetSourceFileForResolvedModule(fileName)
		if extensionless != nil {
			return extensionless
		}
	}

	// Only try adding extensions from the first supported group (which should be .ts/.tsx/.d.ts)
	for _, ext := range supportedExtensions[0] {
		result := p.GetSourceFileForResolvedModule(fileName + ext)
		if result != nil {
			return result
		}
	}
	return nil
}

func NewProgram(opts ProgramOptions) *Program {
	p := &Program{opts: opts}