117 lines
2.2 KiB
Go
117 lines
2.2 KiB
Go
package main
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import (
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"archive/tar"
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"bytes"
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"compress/gzip"
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"context"
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"io"
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"os"
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"path/filepath"
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"runtime"
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"github.com/zhyee/zipstream"
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)
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type Prism struct {
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Instances []Instance
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ctx context.Context
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}
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type Instance struct {
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Path string
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Name string
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MCVer string
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JavaVer string
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}
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func (Prism) CheckInstalled() bool {
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path, _ := os.UserConfigDir()
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_, err := os.Stat(filepath.Join(path, "FCLauncher", "prism"))
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if err == nil {
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return true
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} else {
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return false
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}
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}
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func (p *Prism) Install() {
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suffix := "lin.tar.gz"
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if runtime.GOOS == "windows" {
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suffix = "win.zip"
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}
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buff := new(bytes.Buffer)
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HttpDownload("prism/prism-"+suffix, buff, p.ctx)
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path, _ := os.UserConfigDir()
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os.MkdirAll(filepath.Join(path, "FCLauncher", "prism"), 0755)
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if runtime.GOOS == "windows" {
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zr := zipstream.NewReader(buff)
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for {
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entry, err := zr.GetNextEntry()
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if err == io.EOF {
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break
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}
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if err != nil {
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return
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}
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target := filepath.Join(path, "FCLauncher", "prism", entry.Name)
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if !entry.IsDir() {
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rc, err := entry.Open()
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if err != nil {
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return
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}
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f, err := os.OpenFile(target, os.O_CREATE|os.O_RDWR, entry.FileInfo().Mode())
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if err != nil {
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return
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}
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if _, err := io.Copy(f, rc); err != nil {
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return
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}
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f.Close()
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rc.Close()
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} else {
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if _, err := os.Stat(target); err != nil {
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if err := os.MkdirAll(target, 0755); err != nil {
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return
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}
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}
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}
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}
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} else {
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gzip, _ := gzip.NewReader(buff)
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defer gzip.Close()
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tr := tar.NewReader(gzip)
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out:
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for {
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header, err := tr.Next()
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switch {
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case err == io.EOF:
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break out
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case err != nil:
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return
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case header == nil:
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continue
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}
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target := filepath.Join(path, "FCLauncher", "prism", header.Name)
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switch header.Typeflag {
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case tar.TypeDir:
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if _, err := os.Stat(target); err != nil {
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if err := os.MkdirAll(target, 0755); err != nil {
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return
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}
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}
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case tar.TypeReg:
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f, err := os.OpenFile(target, os.O_CREATE|os.O_RDWR, os.FileMode(header.Mode))
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if err != nil {
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return
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}
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if _, err := io.Copy(f, tr); err != nil {
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return
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}
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f.Close()
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}
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}
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}
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}
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