Add better contextual help in parse errors

cmd/codex/upload.go

@@ -59,11 +59,16 @@ var codexUploadCmd = &cobra.Command{
  if parseErr != nil {
  _, _ = fmt.Fprintf(os.Stderr, "Failed to parse codex (%d issues):\n", len(parseErr.Errors))
  for _, e := range parseErr.Errors {
- _, _ = fmt.Fprintf(os.Stderr, " - %s\n  (%s", red(e.Message), faint(e.Error))
+ _, _ = fmt.Fprintf(os.Stderr, "- %s\n (%s", red(e.Message), blue(e.Error))
  if e.SourcePosition != "" {
  _, _ = fmt.Fprintf(os.Stderr, " at %s", cyan(e.SourcePosition))
  }
+
  _, _ = fmt.Fprintf(os.Stderr, ")\n")
+
+ for _, line := range e.SourceInfo.SourceContext.Lines {
+ _, _ = fmt.Fprintf(os.Stderr, " %s %s\n", faint(">"), line)
+ }
  }
  os.Exit(1)
  }
@@ -84,4 +89,5 @@ var (
  red = color.New(color.FgRed, color.Bold).SprintFunc()
  cyan = color.New(color.FgCyan).SprintFunc()
  faint = color.New(color.Faint).SprintFunc()
+ blue = color.New(color.FgBlue).SprintfFunc()
 )

internal/api/upload_codex.go

@@ -29,6 +29,11 @@ type CodexParseError struct {
  Error string `json:"error"`
  Message string `json:"message"`
  SourcePosition string `json:"sourcePosition"`
+ SourceInfo struct{
+ SourceContext struct {
+ Lines []string `json:"lines"`
+ } `json:"sourceContext"`
+ } `json:"sourceInfo"`
 }
 
 type CodexParseFailedError struct {