Submodule cloning: Needed a single revision

[Flusinerd]

Problem:
Pipeline failing to clone submodule.

Environment:
Both the main repository and submodule are private repositories belonging to the same organisation. I am the owner of the organisation and I have created a PAT with full repo access. This PAT is then added as secret the the main repository.

Pipeline Config:

build:

    runs-on: self-hosted

    strategy:
      matrix:
        node-version: [10.x, 12.x, 14.x, 15.x]
        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/

    steps:
    - name: Checkout
      uses: actions/checkout@v2
      with:
        token: ${{ secrets.CI_PAT }}
        submodules: true
        persist-credentials: true
    - name: Use Node.js ${{ matrix.node-version }}
      uses: actions/setup-node@v1
      with:
        node-version: ${{ matrix.node-version }}
    - run: npm ci
    - run: npm run build --if-present
    - run: npm test

.gitmodules:

[submodule "src/shared"]
	path = src/shared
	url = https://github.com/<org>/<sub-module-repo>.git
	branch = main

If I omit the branch it does not work either.

Self-Hosted:
I am running the pipelines on two of our servers. Both have docker installed and I dont have issues with any other repository that does not include any submodules.
They are both running latest ubtunu 20.04 LTS on x64.
Latest git version has been installed using apt install git

[NotMyself]

Did you ever find a solution to this issue?

[Flusinerd]

Hey, I think I did not. We moved to a monorepo.

[NotMyself]

Well, if you ever run into it again. This is what worked for me. Note the first step does not get submodules a tall.... The second step does though.

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - name: Checkout Source
      uses: actions/checkout@v3
      with:
        token: ${{secrets.TEMPLATE_REPO_PAT}}
        submodules: true
        persist-credentials: true
    - name: Checkout submodules using a PAT
      run: |
        git config --file .gitmodules --get-regexp url | while read url; do
          git config --file=.gitmodules $(echo "$url" | sed -E "s/git@github.com:|https:\/\/github.com\//https:\/\/${{ secrets.TEMPLATE_REPO_PAT }}:${{ secrets.TEMPLATE_REPO_PAT }}@github.com\//")
        done
        git submodule sync
        git submodule update --init --recursive