gosora/updater/main.go

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package main
import (
"bufio"
"fmt"
"os"
"runtime"
"runtime/debug"
"syscall"
"gopkg.in/src-d/go-git.v4"
)
func main() {
scanner := bufio.NewScanner(os.Stdin)
// Capture panics instead of closing the window at a superhuman speed before the user can read the message on Windows
defer func() {
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if r := recover(); r != nil {
fmt.Println(r)
debug.PrintStack()
pressAnyKey(scanner)
return
}
}()
updater(scanner)
}
func pressAnyKey(scanner *bufio.Scanner) {
fmt.Println("Please press enter to exit...")
for scanner.Scan() {
_ = scanner.Text()
return
}
}
// The bool return is a little trick to condense two lines onto one
func logError(err error) bool {
if err == nil {
return true
}
fmt.Println(err)
debug.PrintStack()
return false
}
func updater(scanner *bufio.Scanner) bool {
fmt.Println("Welcome to Gosora's Upgrader")
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fmt.Println("We're going to check for new updates, please wait patiently")
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repo, err := git.PlainOpen(".")
if err != nil {
return logError(err)
}
workTree, err := repo.Worktree()
if err != nil {
return logError(err)
}
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err = workTree.Pull(&git.PullOptions{Force: true})
if err == git.NoErrAlreadyUpToDate {
fmt.Println("You are already up-to-date")
return true
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} else if err != nil && err != git.ErrUnstagedChanges { // fixes a bug in git where it refuses to update the files
return logError(err)
}
err = workTree.Reset(&git.ResetOptions{Mode: git.HardReset})
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if err != nil {
return logError(err)
}
fmt.Println("Updated to the latest commit")
headRef, err := repo.Head()
if err != nil {
return logError(err)
}
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// Get information about the commit
commit, err := repo.CommitObject(headRef.Hash())
if err != nil {
return logError(err)
}
fmt.Println("Commit details:", commit)
switch runtime.GOOS {
case "windows":
err = syscall.Exec("./patcher.bat", []string{}, os.Environ()) // doesn't work, need something for windows
default: //linux, etc.
err = syscall.Exec("./patcher-linux", []string{}, os.Environ())
}
return logError(err)
}