fix a few issue

mrpack.go

@@ -45,7 +45,7 @@ type (
 		FormatVersion int    `json:"formatVersion"`
 		Game          string `json:"game"`
 
-		VersionId string `json:"versionId`
+		VersionId string `json:"versionId"`
 		Name      string `json:"name"`
 		Summary   string `json:"summary,optional"`
 

spigot_installer.go

@@ -47,11 +47,7 @@ func (*SpigotInstaller) Install(path, name string, target string) (installed str
 		foundVersion += "(" + target + ")"
 	}
 
-	buildDir, err := os.MkdirTemp("", "spigot-build-")
-	if err != nil {
-		return
-	}
-	defer os.RemoveAll(buildDir)
+	buildDir := filepath.Join(os.TempDir(), "server-installer-" + PkgVersion + ".bukkit-build-tools.tmp")
 	loger.Infof("Getting %q...", SpigotBuildToolsURI)
 	buildToolJar := filepath.Join(buildDir, "BuildTools.jar")
 	if err = DefaultHTTPClient.Download(SpigotBuildToolsURI, buildToolJar, 0644, nil, -1,
@@ -66,7 +62,7 @@ func (*SpigotInstaller) Install(path, name string, target string) (installed str
 	cmd.Stderr = os.Stdout
 	loger.Infof("Running %q...", cmd.String())
 	if err = cmd.Run(); err != nil {
-		loger.Infof("Build failed. Build log moved to BuildTools.log (if exists)")
+		loger.Infof("Build failed. Build log (if exists) moved to BuildTools.log")
 		os.Rename(filepath.Join(buildDir, "BuildTools.log.txt"), "BuildTools.log")
 		return
 	}

utils.go

@@ -97,7 +97,6 @@ func checkHashStream(r io.Reader, hashes StringMap, w io.Writer) (n int64, err e
 		fmt.Printf("err is not nil: %T", err)
 		return
 	}
-	return
 	for i, h := range hashers {
 		sum := hex.EncodeToString(h.Sum(nil))
 		if expect := expects[i]; expect[1] != sum {
@@ -155,9 +154,9 @@ func formatSize(bytes int64, format string) string {
 		if b <= 1000 {
 			break
 		}
-		b /= 1000
+		b /= 1024
 	}
-	return fmt.Sprintf(format+"%s", b, unit)
+	return fmt.Sprintf(format, b) + unit
 }
 
 type DlCallback = func(n int64, size int64)