gh-aw-test/.github/workflows/permissions.yml at main · githubnext/gh-aw-test · GitHub

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name: Check collaborator permissions (demo)

on:
  workflow_dispatch:

# Global default: read-only to keep things tight.
permissions:
  contents: read

env:
  USERS: "nojaf dsyme pelikhan"
  API_URL: "https://api.github.com"
  API_VERSION: "2022-11-28"

jobs:
  # 1) All scopes read-only (or effectively read-only for contents)
  read_all:
    name: With read-only token (expect 403)
    runs-on: ubuntu-latest
    permissions:
      # You can also use `read-all`, but showing explicit `contents: read` here.
      contents: read
    steps:
      - name: Check three users via REST
        shell: bash
        run: |
          set +e  # we want to keep going even on 403
          IFS=' ' read -r -a users <<< "${USERS}"
          for u in "${users[@]}"; do
            echo "::group::GET /repos/${{ github.repository }}/collaborators/$u/permission"
            code=$(curl -sS -o resp.json -w "%{http_code}" \
              -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
              -H "Accept: application/vnd.github+json" \
              -H "X-GitHub-Api-Version: ${API_VERSION}" \
              "${API_URL}/repos/${{ github.repository }}/collaborators/$u/permission")
            echo "HTTP $code"
            if [ "$code" -ge 200 ] && [ "$code" -lt 300 ]; then
              jq -r '{user:.user.login, permission, role_name} | @text "user=@\(.user) permission=\(.permission) role=\(.role_name)"' resp.json
            else
              cat resp.json
            fi
            echo "::endgroup::"
          done

  # 2) contents:read plus pull-requests:read — still read-only (expect 403)
  read_combo:
    name: Read-only combo (expect 403)
    runs-on: ubuntu-latest
    permissions:
      contents: read
      pull-requests: read
    steps:
      - name: Check three users via REST
        shell: bash
        run: |
          set +e
          IFS=' ' read -r -a users <<< "${USERS}"
          for u in "${users[@]}"; do
            echo "::group::GET /repos/${{ github.repository }}/collaborators/$u/permission"
            code=$(curl -sS -o resp.json -w "%{http_code}" \
              -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
              -H "Accept: application/vnd.github+json" \
              -H "X-GitHub-Api-Version: ${API_VERSION}" \
              "${API_URL}/repos/${{ github.repository }}/collaborators/$u/permission")
            echo "HTTP $code"
            if [ "$code" -ge 200 ] && [ "$code" -lt 300 ]; then
              jq -r '{user:.user.login, permission, role_name} | @text "user=@\(.user) permission=\(.permission) role=\(.role_name)"' resp.json
            else
              cat resp.json
            fi
            echo "::endgroup::"
          done

  # 3) contents:write — should succeed (has push-equivalent)
  write_contents:
    name: "With contents: write (should succeed)"
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - name: Check three users via REST
        shell: bash
        run: |
          set +e
          IFS=' ' read -r -a users <<< "${USERS}"
          for u in "${users[@]}"; do
            echo "::group::GET /repos/${{ github.repository }}/collaborators/$u/permission"
            code=$(curl -sS -D headers.txt -o resp.json -w "%{http_code}" \
              -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
              -H "Accept: application/vnd.github+json" \
              -H "X-GitHub-Api-Version: ${API_VERSION}" \
              "${API_URL}/repos/${{ github.repository }}/collaborators/$u/permission")
            echo "HTTP $code"
            if [ "$code" -ge 200 ] && [ "$code" -lt 300 ]; then
              jq -r '{user:.user.login, permission, role_name} | @text "user=@\(.user) permission=\(.permission) role=\(.role_name)"' resp.json
              # If present (fine-grained actors), show what permissions the API says are acceptable
              echo "x-accepted-github-permissions:"
              grep -i '^x-accepted-github-permissions:' headers.txt || true
            else
              cat resp.json
            fi
            echo "::endgroup::"
          done

  # 4) No contents permission at all — only unrelated scopes (expect 403)
  no_contents:
    name: No contents permission (expect 403)
    runs-on: ubuntu-latest
    permissions:
      pull-requests: read
      issues: read
    steps:
      - name: Check three users via REST
        shell: bash
        run: |
          set +e
          IFS=' ' read -r -a users <<< "${USERS}"
          for u in "${users[@]}"; do
            echo "::group::GET /repos/${{ github.repository }}/collaborators/$u/permission"
            code=$(curl -sS -o resp.json -w "%{http_code}" \
              -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
              -H "Accept: application/vnd.github+json" \
              -H "X-GitHub-Api-Version: ${API_VERSION}" \
              "${API_URL}/repos/${{ github.repository }}/collaborators/$u/permission")
            echo "HTTP $code"
            if [ "$code" -ge 200 ] && [ "$code" -lt 300 ]; then
              jq -r '{user:.user.login, permission, role_name} | @text "user=@\(.user) permission=\(.permission) role=\(.role_name)"' resp.json
            else
              cat resp.json
            fi
            echo "::endgroup::"
          done

  # 5) write-all — also succeeds; shows a broader token example
  write_all:
    name: With write-all (should succeed)
    runs-on: ubuntu-latest
    permissions: write-all
    steps:
      - name: Check three users via REST
        shell: bash
        run: |
          set +e
          IFS=' ' read -r -a users <<< "${USERS}"
          for u in "${users[@]}"; do
            echo "::group::GET /repos/${{ github.repository }}/collaborators/$u/permission"
            code=$(curl -sS -o resp.json -w "%{http_code}" \
              -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
              -H "Accept: application/vnd.github+json" \
              -H "X-GitHub-Api-Version: ${API_VERSION}" \
              "${API_URL}/repos/${{ github.repository }}/collaborators/$u/permission")
            echo "HTTP $code"
            if [ "$code" -ge 200 ] && [ "$code" -lt 300 ]; then
              jq -r '{user:.user.login, permission, role_name} | @text "user=@\(.user) permission=\(.permission) role=\(.role_name)"' resp.json
            else
              cat resp.json
            fi
            echo "::endgroup::"
          done