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package main
import (
"bufio"
"flag"
"fmt"
"net/http"
"os"
"runtime"
"strings"
)
func fail(err error) {
fmt.Printf("An error has occurred:\n%s\n", err.Error())
if runtime.GOOS == "windows" {
fmt.Print("Press 'Enter' to continue...")
fmt.Scanln()
}
os.Exit(-1)
}
func main() {
helpFlag := flag.Bool("help", false, "Show help information")
verboseFlag := flag.Bool("verbose", false, "Print more information")
repoFlag := flag.String("repo", "https://neueland.iserlohn-fortress.net/smolbote/downloads", "Repository path")
platformFlag := flag.String("platform", runtime.GOOS, "Platform")
dryRunFlag := flag.Bool("dry-run", false, "Dry run: only check files, do not download")
flag.Parse()
manifestPath := fmt.Sprintf("%s/%s-sha512.txt", *repoFlag, *platformFlag)
repoPath := fmt.Sprintf("%s/%s/", *repoFlag, *platformFlag)
// help flag --> show usage and exit
if *helpFlag {
fmt.Println("Usage:")
flag.PrintDefaults()
fmt.Println("Paths:")
fmt.Println(" manifest ", manifestPath)
fmt.Println(" repository ", repoPath)
return
}
response, err := http.Get(manifestPath)
if err != nil {
fail(err)
} else if response.StatusCode != 200 {
fmt.Printf("Could not get manifest: %s\n", response.Status)
return
}
defer response.Body.Close()
// read through manifest
scanner := bufio.NewScanner(response.Body)
for scanner.Scan() {
s := strings.Split(scanner.Text(), " ")
filepath := s[1]
checksum := s[0]
if same, err := checkFile(filepath, checksum); err != nil {
fail(err)
} else {
if *verboseFlag {
fmt.Printf("[%s]: %t\n", filepath, same)
}
if !same && !*dryRunFlag {
if err := downloadFile(filepath, repoPath+filepath); err != nil {
fail(err)
}
}
}
}
}
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