138 lines
2.8 KiB
Go
138 lines
2.8 KiB
Go
package runtime
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import (
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"fmt"
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"io"
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"os"
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"github.com/dop251/goja"
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"github.com/evanw/esbuild/pkg/api"
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"reichard.io/poiesis/internal/builtin"
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)
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type Runtime struct {
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vm *goja.Runtime
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stdout io.Writer
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stderr io.Writer
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}
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func New() *Runtime {
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vm := goja.New()
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r := &Runtime{vm: vm, stdout: os.Stdout, stderr: os.Stderr}
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r.setupConsole()
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builtin.RegisterBuiltins(vm)
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return r
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}
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func (r *Runtime) setupConsole() {
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console := r.vm.NewObject()
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_ = r.vm.Set("console", console)
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_ = console.Set("log", func(call goja.FunctionCall) goja.Value {
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args := call.Arguments
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for i, arg := range args {
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if i > 0 {
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_, _ = fmt.Fprint(r.stdout, " ")
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}
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_, _ = fmt.Fprint(r.stdout, arg.String())
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}
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_, _ = fmt.Fprintln(r.stdout)
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return goja.Undefined()
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})
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}
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func (r *Runtime) SetOutput(stdout, stderr io.Writer) {
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r.stdout = stdout
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r.stderr = stderr
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consoleObj := r.vm.Get("console")
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if consoleObj != nil {
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console := consoleObj.ToObject(r.vm)
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if console != nil {
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r.setupConsole()
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}
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}
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}
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func (r *Runtime) RunFile(filePath string, stdout, stderr io.Writer) error {
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r.stdout = stdout
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r.stderr = stderr
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r.setupConsole()
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content, err := r.transformFile(filePath)
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if err != nil {
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_, _ = fmt.Fprintf(stderr, "Error: %v\n", err)
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return err
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}
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if len(content.errors) > 0 {
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_, _ = fmt.Fprintf(stderr, "Transpilation errors:\n")
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for _, err := range content.errors {
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_, _ = fmt.Fprintf(stderr, " %s\n", err.Text)
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}
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return fmt.Errorf("transpilation failed")
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}
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_, err = r.vm.RunString(content.code)
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if err != nil {
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_, _ = fmt.Fprintf(stderr, "Execution error: %v\n", err)
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return err
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}
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return nil
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}
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func (r *Runtime) RunCode(tsCode string, stdout, stderr io.Writer) error {
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r.stdout = stdout
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r.stderr = stderr
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r.setupConsole()
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content := r.transformCode(tsCode)
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if len(content.errors) > 0 {
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_, _ = fmt.Fprintf(stderr, "Transpilation errors:\n")
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for _, err := range content.errors {
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_, _ = fmt.Fprintf(stderr, " %s\n", err.Text)
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}
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return fmt.Errorf("transpilation failed")
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}
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_, err := r.vm.RunString(content.code)
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if err != nil {
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_, _ = fmt.Fprintf(stderr, "Execution error: %v\n", err)
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return err
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}
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return nil
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}
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type transformResult struct {
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code string
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errors []api.Message
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}
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func (r *Runtime) transformFile(filePath string) (*transformResult, error) {
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tsFileContent, err := os.ReadFile(filePath)
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if err != nil {
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return nil, fmt.Errorf("error reading file: %w", err)
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}
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return r.transformCode(string(tsFileContent)), nil
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}
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func (r *Runtime) transformCode(tsCode string) *transformResult {
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result := api.Transform(tsCode, api.TransformOptions{
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Loader: api.LoaderTS,
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Target: api.ES2020,
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Format: api.FormatIIFE,
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Sourcemap: api.SourceMapNone,
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TreeShaking: api.TreeShakingFalse,
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})
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return &transformResult{
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code: string(result.Code),
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errors: result.Errors,
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}
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}
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