[PATCH edk2-platforms v3 5/6] .mergify: Add Mergify YML pull request rules configuration file

["PierreGondois" <pierre.gondois@arm.com>]

From: Pierre Gondois <Pierre.Gondois@arm.com>

These files are copies of the files from the tianocore/edk2
repository. Any modification to the tianocore/edk2 files must be
reflected on the tianocore/edk2-platforms copies.

Initial commid-id in the edk2 repository: ab060128768b
Initial message:

Add directory for the Mergify YML configuration files that
provides rules and actions used to process a pull request.

* Auto commit a PR from EDK II Maintainer with 'push' label
  set and all CI checks pass
* Auto close a PR from any developers without 'push' label
  set and all CI checks pass.
* Auto close a PR from a non EDK II Maintainer that has
  the 'push' label set.
* Post a comment to a PR that has a merge conflict.
  Submitter can resolved conflicts and reopen the PR.
* Post a comment to a PR that fails PatchCheck.py
  Submitter can resolve PatchCheck.py issues and
  reopen the PR.

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3509

Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
---

Notes:
    v3:
     - Align with the latest version in the edk2 repository. [Michael]

 .mergify/config.yml | 50 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 .mergify/config.yml

diff --git a/.mergify/config.yml b/.mergify/config.yml
new file mode 100644
index 000000000000..bd6da4c77937
--- /dev/null
+++ b/.mergify/config.yml
@@ -0,0 +1,50 @@
+## @file
+# Mergify YML file that automatically merges a GitHub pull request against
+# edk2-ci if all of the GitHub branch protections have passed.  It also
+# contains rules to:
+# * auto close branches that are not from an EDK II Maintainer
+# * post a comment on pull requests that have merge conflicts.
+# * post a comment on pull requests that have PatchCheck.py errors.
+#
+# Configuration Notes:
+# * Update the 'base=edk2-ci' statements with the name of the branch to merge
+#   pull requests.
+#
+# * Update the 'status-failure' statement with the name of the name of the Azure
+#   Pipelines Build that performs the EDK II Maintainer check.
+#
+# * This file must be checked into the 'default' branch of a repo.  Copies
+#   of this file on other branches of a repo are ignored by Mergify.
+#
+# Copyright (c) 2019 - 2021, Intel Corporation. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+# https://github.com/apps/mergify
+# https://doc.mergify.io/
+#
+##
+
+queue_rules:
+  - name: default
+    conditions:
+      - base~=(^main|^master|^stable/)
+      - label=push
+
+pull_request_rules:
+  - name: Automatically merge a PR when all required checks pass and 'push' label is present
+    conditions:
+      - base~=(^main|^master|^stable/)
+      - label=push
+    actions:
+      queue:
+        method: rebase
+        rebase_fallback: none
+        name: default
+
+  - name: Post a comment on a PR that can not be merged due to a merge conflict
+    conditions:
+      - base~=(^main|^master|^stable/)
+      - conflict
+    actions:
+      comment:
+        message: PR can not be merged due to conflict.  Please rebase and resubmit
-- 
2.17.1