边缘节点远程安装文件最小化（从16.xM减少到2.xM）

internal/installers/helpers/unzip.go

@@ -0,0 +1,91 @@
+package helpers
+
+import (
+	"archive/zip"
+	"errors"
+	"io"
+	"os"
+)
+
+type Unzip struct {
+	zipFile   string
+	targetDir string
+}
+
+func NewUnzip(zipFile string, targetDir string) *Unzip {
+	return &Unzip{
+		zipFile:   zipFile,
+		targetDir: targetDir,
+	}
+}
+
+func (this *Unzip) Run() error {
+	if len(this.zipFile) == 0 {
+		return errors.New("zip file should not be empty")
+	}
+	if len(this.targetDir) == 0 {
+		return errors.New("target dir should not be empty")
+	}
+
+	reader, err := zip.OpenReader(this.zipFile)
+	if err != nil {
+		return err
+	}
+
+	defer func() {
+		_ = reader.Close()
+	}()
+
+	for _, file := range reader.File {
+		info := file.FileInfo()
+		target := this.targetDir + "/" + file.Name
+
+		// 目录
+		if info.IsDir() {
+			stat, err := os.Stat(target)
+			if err != nil {
+				if !os.IsNotExist(err) {
+					return err
+				} else {
+					err = os.MkdirAll(target, info.Mode())
+					if err != nil {
+						return err
+					}
+				}
+			} else if !stat.IsDir() {
+				err = os.MkdirAll(target, info.Mode())
+				if err != nil {
+					return err
+				}
+			}
+			continue
+		}
+
+		// 文件
+		err := func(file *zip.File, target string) error {
+			fileReader, err := file.Open()
+			if err != nil {
+				return err
+			}
+			defer func() {
+				_ = fileReader.Close()
+			}()
+
+			fileWriter, err := os.OpenFile(target, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, file.FileInfo().Mode())
+			if err != nil {
+				return err
+			}
+			defer func() {
+				_ = fileWriter.Close()
+			}()
+
+			_, err = io.Copy(fileWriter, fileReader)
+			return err
+		}(file, target)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}