go-quasar-partial-ssr/backend/internal/tsgenerator/generator.go

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package tsgenerator
import (
"bytes"
"errors"
"fmt"
"os"
"os/exec"
"server/internal/config"
tsrpc "server/pkg/ts-rpc"
)
func TsGenerate() (string, error) {
path := "GeneratedCode"
if _, err := os.Stat(path); errors.Is(err, os.ErrNotExist) {
err := os.Mkdir(path, os.ModePerm)
if err != nil {
return "", fmt.Errorf("create GeneratedCode directory: %w", err)
}
}
var tsSource = tsrpc.GetTSSource(tsrpc.TSConfig{Url: "http://localhost:3000", TsApi: nil, Path: "."})
formatted, err1 := formatJS(tsSource)
if err1 != nil {
return "", err1
}
err := os.WriteFile("GeneratedCode/generatedTypescript.ts", []byte(formatted), 0644)
if err != nil {
return "", fmt.Errorf("write local generated typescript: %w", err)
}
configPath := os.Getenv("CONFIG_PATH")
if configPath == "" {
configPath = "configs/config.json"
}
if _, err := config.LoadConfig(configPath); err != nil {
return "", fmt.Errorf("load config from %s: %w", configPath, err)
}
frontendAPIPath := os.Getenv("FRONTEND_API_PATH")
if frontendAPIPath == "" {
return "", errors.New("FRONTEND_API_PATH must be set")
}
fmt.Printf("Saving generated TypeScript to %s\n", frontendAPIPath)
err = os.WriteFile(frontendAPIPath+"/api.ts", []byte(formatted), 0644)
if err != nil {
return "", fmt.Errorf("write frontend api.ts: %w", err)
}
return formatted, nil
}
func formatJS(src string) (string, error) {
// Se hai prettier globale:
cmd := exec.Command("prettier", "--parser", "typescript", "--use-tabs", "false", "--tab-width", "2")
// Se hai prettier solo come devDependency:
// cmd := exec.Command("npx", "prettier", "--parser", "typescript")
cmd.Stdin = bytes.NewBufferString(src)
var out bytes.Buffer
var stderr bytes.Buffer
cmd.Stdout = &out
cmd.Stderr = &stderr
err := cmd.Run()
if err != nil {
// Stampa anche lo stderr di Prettier, così vedi lerrore reale
return "", fmt.Errorf("prettier error: %v\nstderr: %s", err, stderr.String())
}
return out.String(), nil
}