feat(actions): migrate Mergify to GitHub's Merge Queue

This is an initial step before completely removing Mergify, to keep the duality betwen the two to avoid downtime with queue management

.github/workflows/cd-deploy-nodes-gcp.patch-external.yml

@@ -1,7 +1,7 @@
 # Workflow patches for skipping Google Cloud CD deployments on PRs from external repositories.
 name: Deploy Nodes to GCP
 
-# Run on PRs from external repositories, let them pass, and then Mergify will check them.
+# Run on PRs from external repositories, let them pass, and then GitHub's Merge Queue will check them.
 # GitHub doesn't support filtering workflows by source branch names, so we have to do it for each
 # job.
 on:
@@ -13,10 +13,16 @@ on:
 # `cd-deploy-nodes-gcp.patch-external.yml` must be kept in sync.
 jobs:
   # We don't patch the testnet job, because testnet isn't required to merge (it's too unstable)
+  get-disk-name:
+    name: Get disk name
+    if: ${{ startsWith(github.event_name, 'pull') && github.event.pull_request.head.repo.fork }}
+    runs-on: ubuntu-latest
+    steps:
+      - run: 'echo "Skipping job on fork"'
+
   build:
     name: Build CD Docker / Build images
     # Only run on PRs from external repositories, skipping ZF branches and tags.
-    if: ${{ startsWith(github.event_name, 'pull') && github.event.pull_request.head.repo.fork }}
     runs-on: ubuntu-latest
     steps:
       - run: 'echo "Skipping job on fork"'
@@ -44,8 +50,3 @@ jobs:
     steps:
       - run: 'echo "Skipping job on fork"'
 
-  get-disk-name:
-    name: Get disk name
-    runs-on: ubuntu-latest
-    steps:
-      - run: 'echo "Skipping job on fork"'

.github/workflows/cd-deploy-nodes-gcp.yml

@@ -1,6 +1,6 @@
 # Google Cloud node deployments and tests that run when Rust code or dependencies are modified,
 # but only on PRs from the ZcashFoundation/zebra repository.
-# (External PRs are tested/deployed by mergify.) 
+# (External PRs are tested/deployed by GitHub's Merge Queue.) 
 #
 # 1. `versioning`: Extracts the major version from the release semver. Useful for segregating instances based on major versions.
 # 2. `build`: Builds a Docker image named `zebrad` with the necessary tags derived from Git.
@@ -27,6 +27,9 @@ concurrency:
   cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 
 on:
+  merge_group:
+    types: [ checks_requested ]
+
   workflow_dispatch:
     inputs:
       network:
@@ -141,15 +144,29 @@ jobs:
         id: set
         run: echo "major_version=${{ steps.get.outputs.result }}" >> "$GITHUB_OUTPUT"
 
+  # Finds a cached state disk for zebra
+  #
+  # Passes the disk name to subsequent jobs using `cached_disk_name` output
+  #
+  get-disk-name:
+    name: Get disk name
+    uses: ./.github/workflows/sub-find-cached-disks.yml
+    # Skip PRs from external repositories, let them pass, and then GitHub's Merge Queue will check them.
+    # This workflow also runs on release tags, the event name check will run it on releases.
+    if: ${{ (!startsWith(github.event_name, 'pull') || !github.event.pull_request.head.repo.fork) && !inputs.no_cached_disk }}
+    with:
+      network: ${{ inputs.network || vars.ZCASH_NETWORK }}
+      disk_prefix: zebrad-cache
+      disk_suffix: ${{ inputs.cached_disk_type || 'tip' }}
+      prefer_main_cached_state: ${{ inputs.prefer_main_cached_state || (github.event_name == 'push' && github.ref_name == 'main' && true) || false }}
+
   # Each time this workflow is executed, a build will be triggered to create a new image
   # with the corresponding tags using information from Git
   #
   # The image will be commonly named `zebrad:<short-hash | github-ref | semver>`
   build:
     name: Build CD Docker
-    # Skip PRs from external repositories, let them pass, and then Mergify will check them.
-    # This workflow also runs on release tags, the event name check will run it on releases.
-    if: ${{ !startsWith(github.event_name, 'pull') || !github.event.pull_request.head.repo.fork }}
+    needs: get-disk-name
     uses: ./.github/workflows/sub-build-docker-image.yml
     with:
       dockerfile_path: ./docker/Dockerfile
@@ -197,20 +214,6 @@ jobs:
       test_variables: '-e NETWORK -e ZEBRA_CONF_PATH="zebrad/tests/common/configs/v1.0.0-rc.2.toml"'
       network: ${{ inputs.network || vars.ZCASH_NETWORK }}
 
-  # Finds a cached state disk for zebra
-  #
-  # Passes the disk name to subsequent jobs using `cached_disk_name` output
-  #
-  get-disk-name:
-    name: Get disk name
-    uses: ./.github/workflows/sub-find-cached-disks.yml
-    if: ${{ !inputs.no_cached_disk }}
-    with:
-      network: ${{ inputs.network || vars.ZCASH_NETWORK }}
-      disk_prefix: zebrad-cache
-      disk_suffix: ${{ inputs.cached_disk_type || 'tip' }}
-      prefer_main_cached_state: ${{ inputs.prefer_main_cached_state || (github.event_name == 'push' && github.ref_name == 'main' && true) || false }}
-
   # Deploy Managed Instance Groups (MiGs) for Mainnet and Testnet,
   # with one node in the configured GCP region.
   #
@@ -422,7 +425,7 @@ jobs:
     # When a new job is added to this workflow, add it to this list.
     needs: [ versioning, build, deploy-nodes, deploy-instance ]
     # Only open tickets for failed or cancelled jobs that are not coming from PRs.
-    # (PR statuses are already reported in the PR jobs list, and checked by Mergify.)
+    # (PR statuses are already reported in the PR jobs list, and checked by GitHub's Merge Queue.)
     if: (failure() && github.event.pull_request == null) || (cancelled() && github.event.pull_request == null)
     runs-on: ubuntu-latest
     steps:

.github/workflows/ci-build-crates.yml

@@ -169,7 +169,7 @@ jobs:
     # When a new job is added to this workflow, add it to this list.
     needs: [ matrix, build ]
     # Only open tickets for failed or cancelled jobs that are not coming from PRs.
-    # (PR statuses are already reported in the PR jobs list, and checked by Mergify.)
+    # (PR statuses are already reported in the PR jobs list, and checked by GitHub's Merge Queue.)
     if: (failure() && github.event.pull_request == null) || (cancelled() && github.event.pull_request == null)
     runs-on: ubuntu-latest
     steps:

.github/workflows/ci-tests.patch-external.yml

@@ -1,7 +1,7 @@
 # Workflow patches for skipping CI tests on PRs from external repositories
 name: Run tests
 
-# Run on PRs from external repositories, let them pass, and then Mergify will check them.
+# Run on PRs from external repositories, let them pass, and then GitHub's Merge Queue will check them.
 # GitHub doesn't support filtering workflows by source branch names, so we have to do it for each
 # job.
 on:

.github/workflows/ci-tests.yml

@@ -10,6 +10,9 @@ concurrency:
   cancel-in-progress: true
 
 on:
+  merge_group:
+    types: [checks_requested]
+
   schedule:
     # Run this job every Friday at mid-day UTC
     # This is limited to the Zebra and lightwalletd Full Sync jobs
@@ -119,7 +122,7 @@ jobs:
   # testnet when running the image.
   build:
     name: Build images
-    # Skip PRs from external repositories, let them pass, and then Mergify will check them
+    # Skip PRs from external repositories, let them pass, and then GitHub's Merge Queue will check them
     if: ${{ !startsWith(github.event_name, 'pull') || !github.event.pull_request.head.repo.fork }}
     uses: ./.github/workflows/sub-build-docker-image.yml
     with:

.github/workflows/ci-unit-tests-os.yml

@@ -14,6 +14,9 @@ concurrency:
   cancel-in-progress: true
 
 on:
+  merge_group:
+    types: [checks_requested]
+
   workflow_dispatch:
 
   pull_request:
@@ -305,7 +308,7 @@ jobs:
     # When a new job is added to this workflow, add it to this list.
     needs: [ test,  install-from-lockfile-no-cache, check-cargo-lock, cargo-deny, unused-deps ]
     # Only open tickets for failed or cancelled jobs that are not coming from PRs.
-    # (PR statuses are already reported in the PR jobs list, and checked by Mergify.)
+    # (PR statuses are already reported in the PR jobs list, and checked by GitHub's Merge Queue.)
     if: (failure() && github.event.pull_request == null) || (cancelled() && github.event.pull_request == null)
     runs-on: ubuntu-latest
     steps:

.github/workflows/docs-deploy-firebase.patch-external.yml

@@ -1,7 +1,7 @@
 # Workflow patches for skipping Google Cloud docs updates on PRs from external repositories.
 name: Docs
 
-# Run on PRs from external repositories, let them pass, and then Mergify will check them.
+# Run on PRs from external repositories, let them pass, and then GitHub's Merge Queue will check them.
 # GitHub doesn't support filtering workflows by source branch names, so we have to do it for each
 # job.
 on:

.github/workflows/docs-deploy-firebase.yml

@@ -1,5 +1,5 @@
 # Google Cloud docs updates that run when docs, Rust code, or dependencies are modified,
-# but only on PRs from the ZcashFoundation/zebra repository. (External PRs are deployed by mergify.)
+# but only on PRs from the ZcashFoundation/zebra repository. (External PRs are deployed by GitHub's Merge Queue.)
 
 # - Builds and deploys Zebra Book Docs using mdBook, setting up necessary tools and deploying to Firebase.
 # - Compiles and deploys external documentation, setting up Rust with the beta toolchain and default profile, building the docs, and deploying them to Firebase.
@@ -74,7 +74,7 @@ env:
 jobs:
   build-docs-book:
     name: Build and Deploy Zebra Book Docs
-    # Skip PRs from external repositories, let them pass, and then Mergify will check them
+    # Skip PRs from external repositories, let them pass, and then GitHub's Merge Queue will check them
     if: ${{ !startsWith(github.event_name, 'pull') || !github.event.pull_request.head.repo.fork }}
     timeout-minutes: 5
     runs-on: ubuntu-latest

.github/workflows/release-crates-io.yml

@@ -112,7 +112,7 @@ jobs:
     # When a new job is added to this workflow, add it to this list.
     needs: [ check-release ]
     # Only open tickets for failed or cancelled jobs that are not coming from PRs.
-    # (PR statuses are already reported in the PR jobs list, and checked by Mergify.)
+    # (PR statuses are already reported in the PR jobs list, and checked by GitHub's Merge Queue.)
     if: (failure() && github.event.pull_request == null) || (cancelled() && github.event.pull_request == null)
     runs-on: ubuntu-latest
     steps:

.github/workflows/sub-ci-integration-tests-gcp.yml

@@ -1,5 +1,5 @@
 # Google Cloud integration tests that run when Rust code or dependencies are modified,
-# but only on PRs from the ZcashFoundation/zebra repository. (External PRs are tested by mergify.)
+# but only on PRs from the ZcashFoundation/zebra repository. (External PRs are tested by GitHub's Merge Queue.)
 #
 # Specific conditions and dependencies are set for each job to ensure they are executed in the correct sequence and under the right circumstances.
 # Each test has a description of the conditions under which it runs.
@@ -36,10 +36,6 @@ on:
 #! `sub-deploy-integration-tests-gcp.yml` workflow file as inputs. If modified in this file, they must
 #! also be updated in the `sub-deploy-integration-tests-gcp.yml` file.
 jobs:
-  # to also run a job on Mergify head branches,
-  # add `|| (github.event_name == 'push' && startsWith(github.head_ref, 'mergify/merge-queue/'))`:
-  # https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#running-your-workflow-based-on-the-head-or-base-branch-of-a-pull-request-1
-
   # Check if the cached state disks used by the tests are available for the default network.
   #
   # The default network is mainnet unless a manually triggered workflow or repository variable
@@ -48,7 +44,7 @@ jobs:
   # The outputs for this job have the same names as the workflow outputs in sub-find-cached-disks.yml
   get-available-disks:
     name: Check if cached state disks exist for ${{ inputs.network || vars.ZCASH_NETWORK }}
-    # Skip PRs from external repositories, let them pass, and then Mergify will check them
+    # Skip PRs from external repositories, let them pass, and then GitHub's Merge Queue will check them
     if: ${{ !startsWith(github.event_name, 'pull') || !github.event.pull_request.head.repo.fork }}
     uses: ./.github/workflows/sub-find-cached-disks.yml
     with:
@@ -554,7 +550,7 @@ jobs:
         scan-task-commands-test,
       ]
     # Only open tickets for failed scheduled jobs, manual workflow runs, or `main` branch merges.
-    # (PR statuses are already reported in the PR jobs list, and checked by Mergify.)
+    # (PR statuses are already reported in the PR jobs list, and checked by GitHub's Merge Queue.)
     if: (failure() && github.event.pull_request == null) || (cancelled() && github.event.pull_request == null)
     runs-on: ubuntu-latest
     steps:

.github/workflows/sub-ci-unit-tests-docker.yml

@@ -1,5 +1,5 @@
 # Google Cloud unit tests that run when Rust code or dependencies are modified,
-# but only on PRs from the ZcashFoundation/zebra repository. (External PRs are tested by mergify.)
+# but only on PRs from the ZcashFoundation/zebra repository. (External PRs are tested by GitHub's Merge Queue.)
 #
 # This workflow is designed for running various unit tests within Docker containers.
 # Jobs:
@@ -183,7 +183,7 @@ jobs:
     # Testnet jobs are not in this list, because we expect testnet to fail occasionally.
     needs: [ test-all, test-fake-activation-heights, test-empty-sync, test-lightwalletd-integration, test-configuration-file, test-zebra-conf-path ]
     # Only open tickets for failed scheduled jobs, manual workflow runs, or `main` branch merges.
-    # (PR statuses are already reported in the PR jobs list, and checked by Mergify.)
+    # (PR statuses are already reported in the PR jobs list, and checked by GitHub's Merge Queue.)
     # TODO: if a job times out, we want to create a ticket. Does failure() do that? Or do we need cancelled()?
     if: failure() && github.event.pull_request == null
     runs-on: ubuntu-latest