如何在GitHub Actions的uses中参数化传递inputs.custom参数？

需求场景 #

用户尝试通过inputs.custom参数动态指定uses字段引用的子工作流文件，期望实现的代码逻辑如下：

jobs:
  test-custom:
    name: Test Custom
    uses: ./.github/workflows/work4-${{ inputs.custom }}.yml

完整示例文件 #

1. 触发工作流 work1-build.yml

name: Start workflow fail

on: [push]

jobs:  
  build-fail:
    name: Build with other workflow
    uses: ./.github/workflows/work3-build-fail.yml
    with:
      custom: custom-name1

2. 中转工作流 work3-build-fail.yml

name: Build fail with input test

on:
  workflow_call:
    inputs:
      custom:
        description: Some custom string
        required: true
        type: string

jobs:
  test-custom:
    name: Test Custom
    uses: ./.github/workflows/work4-${{ inputs.custom }}.yml

3. 目标子工作流 work4-custom-name1.yml

name: Custom 1

on:
  workflow_call
  
jobs:
  Explore-GitHub-Actions:
    runs-on: ubuntu-latest
    steps:
      - run: echo "IN CUSTOM 1"

运行报错信息 #

执行上述工作流后，GitHub返回如下错误：

Invalid workflow file
error parsing called workflow
".github/workflows/work1-build.yml"
-> "./.github/workflows/work3-build-fail.yml" (source branch with sha:720087c8794e76f52277f9b1229b44ea65ab89d5)
--> "./.github/workflows/work4-${{ inputs.custom }}.yml"
: failed to fetch workflow: workflow was not found.

已知可行的参数使用方式 #

用户已验证inputs.custom可在步骤的run命令中正常使用，示例代码如下：

test-print:
  runs-on: ubuntu-latest
  name: Print input
  steps:       
    - name: Step print input
      run: echo ${{ inputs.custom }}

核心限制说明 #

GitHub官方文档中无uses参数化的相关示例，本质原因是：GitHub Actions在工作流解析阶段会提前校验uses引用的文件路径，不会等到运行时再解析变量。也就是说，uses字段的路径必须是固定的静态值，无法通过动态变量拼接生成。

内容的提问来源于stack exchange，提问作者pbaranski