fix(stack): unable to delete invalid stack [EE-5753] (#11813)

api/exec/compose_stack.go

@@ -76,15 +76,9 @@ func (manager *ComposeStackManager) Down(ctx context.Context, stack *portainer.S
 		defer proxy.Close()
 	}
 
-	envFilePath, err := createEnvFile(stack)
-	if err != nil {
-		return errors.Wrap(err, "failed to create env file")
-	}
-
 	err = manager.deployer.Remove(ctx, stack.Name, nil, libstack.Options{
-		WorkingDir:  stack.ProjectPath,
-		EnvFilePath: envFilePath,
-		Host:        url,
+		WorkingDir: "",
+		Host:       url,
 	})
 
 	return errors.Wrap(err, "failed to remove a stack")
@@ -148,28 +142,46 @@ func createEnvFile(stack *portainer.Stack) (string, error) {
 	}
 	defer envfile.Close()
 
-	copyDefaultEnvFile(stack, envfile)
+	// Copy from default .env file
+	defaultEnvPath := path.Join(stack.ProjectPath, path.Dir(stack.EntryPoint), ".env")
+	if err = copyDefaultEnvFile(envfile, defaultEnvPath); err != nil {
+		return "", err
+	}
 
-	for _, v := range stack.Env {
-		envfile.WriteString(fmt.Sprintf("%s=%s\n", v.Name, v.Value))
+	// Copy from stack env vars
+	if err = copyConfigEnvVars(envfile, stack.Env); err != nil {
+		return "", err
 	}
 
 	return "stack.env", nil
 }
 
 // copyDefaultEnvFile copies the default .env file if it exists to the provided writer
-func copyDefaultEnvFile(stack *portainer.Stack, w io.Writer) {
-	defaultEnvFile, err := os.Open(path.Join(path.Join(stack.ProjectPath, path.Dir(stack.EntryPoint)), ".env"))
+func copyDefaultEnvFile(w io.Writer, defaultEnvFilePath string) error {
+	defaultEnvFile, err := os.Open(defaultEnvFilePath)
 	if err != nil {
 		// If cannot open a default file, then don't need to copy it.
 		// We could as well stat it and check if it exists, but this is more efficient.
-		return
+		return nil
 	}
 
 	defer defaultEnvFile.Close()
 
 	if _, err = io.Copy(w, defaultEnvFile); err == nil {
-		io.WriteString(w, "\n")
+		if _, err = fmt.Fprintf(w, "\n"); err != nil {
+			return fmt.Errorf("failed to copy default env file: %w", err)
+		}
 	}
+	return nil
 	// If couldn't copy the .env file, then ignore the error and try to continue
 }
+
+// copyConfigEnvVars write the environment variables from stack configuration to the writer
+func copyConfigEnvVars(w io.Writer, envs []portainer.Pair) error {
+	for _, v := range envs {
+		if _, err := fmt.Fprintf(w, "%s=%s\n", v.Name, v.Value); err != nil {
+			return fmt.Errorf("failed to copy config env vars: %w", err)
+		}
+	}
+	return nil
+}