Add non-blocking GHA workflow to warn when ADO pipeline YAML file changes

[Copilot]

PRs that modify .azdo/ci-pr.yaml can cause Azure DevOps to disable or require approval for the DV-Python-SDK-PullRequest (definitionId=29922) pipeline after merge, requiring a manual re-enable step that's easy to forget.

Changes

• .github/workflows/ado-pipeline-yaml-pr-warning.yml — new workflow named Warn when ADO pipeline YAML file changes that:
  • Triggers only on PRs touching .azdo/ci-pr.yaml
  • Emits a ::warning annotation in the Actions log referencing the file and ADO pipeline URL
  • Writes a formatted markdown callout to $GITHUB_STEP_SUMMARY for visibility in the GitHub UI
  • Posts a resolvable file-level review comment on .azdo/ci-pr.yaml so reviewers must explicitly acknowledge and resolve the warning before merging
  • Always succeeds (non-blocking); minimal contents: read and pull-requests: write permissions

Original prompt

Create a non-blocking GitHub Actions workflow that warns when the Azure DevOps PR validation pipeline YAML file changes.

Repo: microsoft/PowerPlatform-DataverseClient-Python
Base branch: main

Background / Why

Any PR that changes .azdo/ci-pr.yaml may cause Azure DevOps to disable/require approval for the PR validation pipeline YAML after merge. We want a pre-merge guardrail that warns (non-blocking) so authors/maintainers remember to perform the post-merge manual re-enable/approval step.

ADO Pipeline referenced in messaging:

• Name: DV-Python-SDK-PullRequest
• definitionId: 29922
• URL: https://dev.azure.com/dynamicscrm/OneCRM/_build?definitionId=29922

Requirements

Add exactly one GitHub Actions workflow file:

• Path: .github/workflows/ado-pipeline-yaml-pr-warning.yml
• Trigger: pull_request with paths: [".azdo/ci-pr.yaml"]
• Behavior: always succeeds (non-blocking)
• Steps:
  1. Print a ::warning in logs referencing the file
  2. Write the same message into $GITHUB_STEP_SUMMARY so it’s visible in the UI
• Permissions: minimal (contents: read)

Exact workflow content

Create the file with the following exact YAML:

name: Warn when ADO PR pipeline YAML changes

on:
  pull_request:
    paths:
      - ".azdo/ci-pr.yaml"

permissions:
  contents: read

jobs:
  warn:
    runs-on: ubuntu-latest
    steps:
      - name: Emit warning in logs
        run: |
          echo "::warning file=.azdo/ci-pr.yaml::This PR changes .azdo/ci-pr.yaml. After merge, Azure DevOps may disable/require approval for the PR pipeline YAML until it is re-enabled/approved."

          echo "ADO pipeline: DV-Python-SDK-PullRequest (definitionId=29922)"
          echo "https://dev.azure.com/dynamicscrm/OneCRM/_build?definitionId=29922"

      - name: Add workflow summary
        run: |
          {
            echo "## ADO PR pipeline YAML change detected"
            echo ""
            echo "**File changed:** \`.azdo/ci-pr.yaml\`"
            echo ""
            echo "**Why this matters:** After this is merged, Azure DevOps may disable/require approval for the PR pipeline YAML."
            echo ""
            echo "**Action required (post-merge):** Re-enable / approve the updated YAML for:"
            echo "- **DV-Python-SDK-PullRequest** (definitionId=29922)"
            echo "- https://dev.azure.com/dynamicscrm/OneCRM/_build?definitionId=29922"
            echo ""
            echo "Then trigger a run to confirm PR validation works."
          } >> "$GITHUB_STEP_SUMMARY"

Explicitly out of scope

Do not add any post-merge automation, GitHub issue creation, Teams webhooks, or push-to-main workflows.

This pull request was created from Copilot chat.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[Copilot]

Pull request overview

Adds a non-blocking GitHub Actions workflow that triggers on PRs modifying the Azure DevOps PR validation pipeline YAML, emitting a warning in logs and in the workflow summary to remind maintainers about required post-merge ADO approval steps.

Changes:

• Added a new pull_request workflow scoped to .azdo/ci-pr.yaml changes
• Emits a ::warning and writes a detailed message to $GITHUB_STEP_SUMMARY

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Saurabh Ravindra Badenkal (saurabhrb)]

sample preview from PR #125