Golang: Read File and Write to Disk with Arguments
package main
import (
"io/ioutil"
"os"
"fmt"
)
var (
input_filename string
output_filename string
)
func main() {
if len(os.Args) < 5 {
fmt.Printf("Usage: (-i/--input) 'input_filename' (-o/--output) 'output_filename' \n")
os.Exit(0)
}
for i, arg := range os.Args {
if arg == "-i" || arg == "--input" {
input_filename = os.Args[i+1]
}
if arg == "-o" || arg == "--output" {
output_filename = os.Args[i+1]
}
}
input_file_content, error := ioutil.ReadFile(input_filename)
if error != nil {
panic(error)
}
fmt.Println("File used for reading:", input_filename)
ioutil.WriteFile(output_filename, input_file_content, 0644)
fmt.Println("File used for writing:", output_filename)
}