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shell-dirbookmark.go
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shell-dirbookmark.go
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package main
import (
"bufio"
"errors"
"fmt"
"io/fs"
"log"
"os"
"github.com/urfave/cli/v2"
)
var fileStorage string = "/home/"+os.Getenv("USER")+"/Documents/shell-bookmarks/bookmarks.txt"
var bookmarkPath string = ""
var file *os.File
func main(){
app := setUpApp()
if err := app.Run(os.Args); err != nil {
log.Fatal(err)
}
}
func setUpApp() *cli.App {
return &cli.App {
Name: "shell-bookmark",
Flags: []cli.Flag {},
Action: func(context *cli.Context) error {
if context.NArg() > 0 {
args := context.Args()
command := args.Get(0)
bookmarkPath = args.Get(1)
var err error
err = openOrCreateFile()
defer file.Close()
if err != nil {
return err
}
if command == "add" {
if err := addBookMark(); err != nil {
return err
}
return nil
}
if command == "list" {
lines, err := readLines();
if err != nil {
return err
}
for line := range lines {
fmt.Printf("%ṣ\n",lines[line])
}
return nil
}
}
return nil
},
}
}
func openOrCreateFile() error {
openFile, err := os.OpenFile(fileStorage, os.O_RDWR, os.ModeAppend)
if err != nil {
if errors.Is(err, fs.ErrNotExist) {
err = nil
openFile, err = os.Create(fileStorage)
if err != nil {
log.Fatalf("createFile: %s", err)
return err
}
} else {
log.Fatalf("openFile: %s", err)
return err
}
}
file = openFile
return err
}
func addBookMark() error {
allBookMarksInFile, err := readLines()
if err != nil {
log.Fatalf("readLines: %s", err)
return err
}
allBookMarksInFile = append(allBookMarksInFile, bookmarkPath)
if err := writeLines(allBookMarksInFile); err != nil {
log.Fatalf("writeLines: %s", err)
return err
}
return nil
}
func readLines() ([]string, error) {
var lines []string
scanner := bufio.NewScanner(file)
for scanner.Scan() {
lines = append(lines, scanner.Text())
}
return lines, scanner.Err()
}
func writeLines(lines []string) error {
writer := bufio.NewWriter(file)
for _, line := range lines {
fmt.Fprintln(writer, line)
}
return writer.Flush()
}