feat: install aqua-proxy automatically

pkg/controller/install.go

@@ -23,6 +23,13 @@ func (ctrl *Controller) Install(ctx context.Context, param *Param) error {
 	for _, pkgInfo := range cfg.InlineRepository {
 		inlineRepo[pkgInfo.Name] = pkgInfo
 	}
+
+	if _, err := os.Stat(filepath.Join(ctrl.RootDir, "bin", "aqua-proxy")); err != nil {
+		if err := ctrl.installProxy(ctx); err != nil {
+			return err
+		}
+	}
+
 	for _, pkg := range cfg.Packages {
 		if err := ctrl.installPackage(ctx, inlineRepo, pkg); err != nil {
 			return fmt.Errorf("install the package %s: %w", pkg.Name, err)
@@ -87,3 +94,52 @@ func (ctrl *Controller) installPackage(ctx context.Context, inlineRepo map[strin
 func getPkgPath(aquaRootDir string, pkg *Package, pkgInfo *PackageInfo, assetName string) string {
 	return filepath.Join(aquaRootDir, "pkgs", pkgInfo.Type, "github.com", pkgInfo.Repo, pkg.Version, assetName)
 }
+
+func (ctrl *Controller) installProxy(ctx context.Context) error {
+	pkg := &Package{
+		Name:       "aqua-proxy",
+		Version:    "v0.1.0",
+		Repository: "inline",
+	}
+	logE := logrus.WithFields(logrus.Fields{
+		"package_name":    pkg.Name,
+		"package_version": pkg.Version,
+		"repository":      pkg.Repository,
+	})
+	logE.Info("install the proxy")
+	pkgInfo := &PackageInfo{
+		Name:     "inline",
+		Type:     "github_release",
+		Repo:     "suzuki-shunsuke/aqua-proxy",
+		Artifact: nil,
+		Files: []*File{
+			{
+				Name: "aqua-proxy",
+				Src:  "aqua-proxy",
+			},
+		},
+	}
+	assetName := "aqua-proxy_linux_amd64.tar.gz"
+
+	pkgPath := getPkgPath(ctrl.RootDir, pkg, pkgInfo, assetName)
+	// check if the repository exists
+	logE.Debug("check if the package is already installed")
+	finfo, err := os.Stat(pkgPath)
+	if err != nil {
+		// file doesn't exist
+		if err := ctrl.download(ctx, pkg, pkgInfo, pkgPath, assetName); err != nil {
+			return err
+		}
+	} else {
+		if !finfo.IsDir() {
+			return fmt.Errorf("%s isn't a directory", pkgPath)
+		}
+	}
+
+	// create a symbolic link
+	if err := os.Symlink(filepath.Join(pkgPath, "aqua-proxy"), filepath.Join(ctrl.RootDir, "bin", "aqua-proxy")); err != nil {
+		return fmt.Errorf("create a symbolic link: %w", err)
+	}
+
+	return nil
+}