feat: 🎉 complete maker nginx(app)

internal/controller/installer/installer.go

@@ -1,8 +1,39 @@
-package controller
+package installer
+
+import (
+	"context"
+	"errors"
+	"os/exec"
+
+	"gitea.loveuer.com/yizhisec/pkg3/logger"
+)
 
 type installer struct {
+	target string
 }
 
-func NewInstaller() *installer {
-	return &installer{}
+func (i *installer) targetOK(ctx context.Context) error {
+	if i.target == "" {
+		logger.Debug("🎯 installer.targetOK: target = self")
+		return nil
+	}
+
+	// run ssh <target>, check if it's reachable, and it's root user
+	cmd := exec.CommandContext(ctx, "ssh", i.target, "whoami")
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		logger.Debug("❌ installer.targetOK: check target %s failed, err = %v", i.target, err)
+		return err
+	}
+
+	if string(output) != "root\n" {
+		logger.Debug("❌ installer.targetOK: check target %s failed, output = %s", i.target, string(output))
+		return errors.New("target is not root user")
+	}
+
+	return nil
+}
+
+func NewInstaller(target string) *installer {
+	return &installer{target: target}
 }