.gitlab-ci.yml以包含来自多个yml文件的多个shell函数

我有一个Gitlab mono存储库，其中包含一些后端Java和前端Node.js代码.为了创建CI，我正在研究一种共享方法来构建这两个应用程序.

I have a Gitlab mono repository with some backend Java and frontend Node.js code. To create a CI, I'm working on a shared approach to build both the applications.

在应用程序存储库中，我们将其称为"A"，我有源代码以及如下的.gitlab-ci.yml文件，

In the application repository, let's call it "A", I have source code as well a .gitlab-ci.yml file as below,

A
├── .gitlab-ci.yml
├── backendapi
└── ui

.gitlab-ci.yml 文件

---
include: 
  - project: 'root/B'
    ref: master
    file: 'top-level.yml'

  - project: 'root/B'
    ref: master
    file: 'maven.yml'

  - project: 'root/B'
    ref: master
    file: 'node.yml'

我还有一个名为"B"的存储库，其中所有我的CI功能都存储在三个不同的文件中.

I have another repository called "B", where I have all my CI functionalities in three different files.

B
├── maven.yml
├── node.yml
└── top-level.yml

1. top-level.yml 文件，其中包含我的构建阶段，

1. top-level.yml file that has my build stage in it,

---
stages:
  - build

variables:
  GIT_SSL_NO_VERIFY: "1"

.build_script: &build_script
  stage: build
  tags:
    - default
    - docker

java_build:
  <<: *build_script
  image: 
    name: maven:latest
  script:
    - backend_build

node_build:
  <<: *build_script
  image: 
    name: node:slim
  script:
    - frontend_build

1. maven.yml ，具有mvn构建功能，

1. maven.yml, that has mvn build function,

.maven_build: &maven_build |-
  function backend_build {
    cd backendapi
    mvn clean package -DskipTests
  }

before_script:
  - *maven_build

1. node.yml ，其中具有节点功能，

1. node.yml, with node function in it,

.node_build: &node_build |-
  function frontend_build {
    cd ui
    npm install
    npm build
  }

before_script:
  - *node_build 

运行存储库"A"中的 .gitlab-ci.yml 文件时，它正在调用 top-level.yml ， maven.yml和 node.yml 文件来自存储库"B"，很好.

When the .gitlab-ci.yml file in repository "A" is run, it is calling the top-level.yml, maven.yml and node.yml files from the repository "B" which is good.

这里的问题是，当它运行 java_build 时，它无法从 maven.yml 中找到 backend_build 函数，似乎仅从 node.yml 文件加载 frontend_build 函数或从 maven.yml 文件覆盖 backend_build 函数. node_build 可以正常工作，因为它可以找到 frontend_build 函数.

The problem here is when it runs the java_build it is unable to find the backend_build function from maven.yml instead it seems like it only loading the frontend_build function from node.yml file or overwriting the backend_build function from maven.yml file. The node_build works as expected, cause it can find the frontend_build function.

the Skipping Git submodules setup
Authenticating with credentials from /root/.docker/config.json
Authenticating with credentials from /root/.docker/config.json
Authenticating with credentials from /root/.docker/config.json
$ function frontend_build { # collapsed multi-line command
$ backend_build
/bin/bash: line 90: backend_build: command not found

我知道我可以将所有功能复制到存储库"B"中的一个大yml文件中，并在存储库"A"中将.gitlab-ci.yml包括在内，但在这里我试图理解是否有可能尝试以上方法.

I know that I can copy all the functions into one big yml file in repository "B" and include the in .gitlab-ci.yml in the repository "A" but here I'm trying to understand is it even possible to try the above approach.

提前谢谢！