cmd send file to google drive

package main

import (
    "context"
    "flag"
    "fmt"
    "io"
    "log"
    "net/http"
    "os"
    "path/filepath"
    "runtime"
    "strings"

    "google.golang.org/api/drive/v3"
    "google.golang.org/api/option"
    "golang.org/x/oauth2/google"
)

func getClient(configPath string) (*http.Client, error) {
    b, err := ioutil.ReadFile(configPath)
    if err != nil {
        return nil, fmt.Errorf("error reading credentials file: %v", err)
    }

    config, err := google.ConfigFromJSON(b, drive.DriveFileScope)
    if err != nil {
        return nil, fmt.Errorf("error parsing credentials file: %v", err)
    }

    client, err := getClientFromWeb(config)
    if err != nil {
        return nil, fmt.Errorf("error creating client from web: %v", err)
    }

    return client, nil
}

func getClientFromWeb(config oauth2.Config) (http.Client, error) {
    tokenFile := "token.json"
    tok, err := tokenFromFile(tokenFile)
    if err != nil {
        tok, err = getTokenFromWeb(config)
        if err != nil {
            return nil, fmt.Errorf("unable to retrieve token from web: %v", err)
        }
        saveToken(tokenFile, tok)
    }
    return config.Client(context.Background(), tok), nil
}

func getTokenFromWeb(config oauth2.Config) (oauth2.Token, error) {
    authURL := config.AuthCodeURL("state-token", oauth2.AccessTypeOffline)
    fmt.Printf("Go to the following link in your browser, then type the "+
        "authorization code: \n%v\n", authURL)

    var authCode string
    if _, err := fmt.Scan(&authCode); err != nil {
        return nil, fmt.Errorf("unable to read authorization code: %v", err)
    }

    tok, err := config.Exchange(context.Background(), authCode)
    if err != nil {
        return nil, fmt.Errorf("unable to retrieve token from web: %v", err)
    }
    return tok, nil
}

func tokenFromFile(file string) (*oauth2.Token, error) {
    f, err := os.Open(file)
    if err != nil {
        return nil, err
    }
    defer f.Close()
    tok := &oauth2.Token{}
    err = json.NewDecoder(f).Decode(tok)
    return tok, err
}

func saveToken(file string, token *oauth2.Token) {
    fmt.Printf("Saving credential file to: %s\n", file)
    f, err := os.OpenFile(file, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
    if err != nil {
        log.Fatalf("Unable to cache oauth token: %v", err)
    }
    defer f.Close()
    json.NewEncoder(f).Encode(token)
}

func uploadFile(client *http.Client, filePath string, driveFolderID string) error {
    service, err := drive.NewService(context.Background(), option.WithHTTPClient(client))
    if err != nil {
        return fmt.Errorf("error creating Drive service: %v", err)
    }

    file, err := os.Open(filePath)
    if err != nil {
        return fmt.Errorf("error opening file: %v", err)
    }
    defer file.Close()

    driveFile := &drive.File{
        Name: filepath.Base(filePath),
    }

    if driveFolderID != "" {
        driveFile.Parents = []string{driveFolderID}
    }

    _, err = service.Files.Create(driveFile).Media(file).Do()
    if err != nil {
        return fmt.Errorf("error uploading file: %v", err)
    }

    return nil
}

func main() {
    configPath := flag.String("config", "credentials.json", "Path to the client secret JSON file.")
    filePath := flag.String("file", "", "Path to the file to upload.")
    driveFolderID := flag.String("folder", "", "ID of the Google Drive folder to upload the file to.")

    flag.Parse()

    if *filePath == "" {
        log.Fatal("File path is required. Use the -file flag to specify the file to upload.")
    }

    client, err := getClient(*configPath)
    if err != nil {
        log.Fatalf("Unable to get Drive client: %v", err)
    }

    err = uploadFile(client, filePath, driveFolderID)
    if err != nil {
        log.Fatalf("Error uploading file: %v", err)
    }

    fmt.Println("File uploaded successfully.")
}