CONTRIB: Automate AUTHORS file update

AUTHORS

@@ -1,8 +1,8 @@
 Akshay Venkatesh <akvenkatesh@nvidia.com>
 Aleksey Senin <alekseys@nvidia.com>
-Alexey Rivkin <arivkin@nvidia.com>
 Alex Margolin <alex.margolin@huawei.com>
 Alex Mikheev <alexm@mellanox.com>
+Alexey Rivkin <arivkin@nvidia.com>
 Alina Sklarevich <alinas@mellanox.com>
 Anatoly Vildemanov <anatolyv@nvidia.com>
 Andrey Maslennikov <andreyma@mellanox.com>

buildlib/pr/codestyle.yml

@@ -63,6 +63,31 @@ jobs:
           fi
         condition: eq(variables['Build.Reason'], 'PullRequest')
 
+  - job: author
+    displayName: AUTHORS file update check
+    pool:
+      name: MLNX
+      demands:
+      - ucx_docker -equals yes
+    container: fedora
+    steps:
+      - checkout: self
+        clean: true
+        fetchDepth: 100
+        retryCountOnTaskFailure: 5
+
+      - bash: |
+          set -eEx
+
+          BASE_SOURCEVERSION=$(git rev-parse HEAD^)
+          range="$BASE_SOURCEVERSION..$(Build.SourceVersion)"
+
+          echo "Looking for missing AUTHORS on commit range ${range}"
+          ./contrib/authors_update.sh "$range"
+          git diff --exit-code
+        displayName: AUTHORS file check
+
+
   - job: codespell
     displayName: codespell check
     pool:

contrib/authors_update.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+#
+# Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# See file LICENSE for terms.
+#
+
+set -eEu -o pipefail
+
+range="${1?Provide commit range like orig/v1.17..orig/v1.18}"
+
+if [ ! -w AUTHORS ]
+then
+    echo "AUTHORS file not accessible"
+    exit 1
+fi
+
+# Failure message triggered if range is not valid
+lines=$(git log --no-merges --pretty=format:"%an%x09%ae" "$range" | sort | uniq)
+if [ -z "$lines" ]
+then
+    echo "Error: empty range \"$range\""
+    exit 1
+fi
+
+tmp=$(mktemp --tmpdir=./)
+grep @ AUTHORS >"$tmp"
+
+echo "Names:"
+
+echo -e "$lines" | \
+while IFS=$'\t' read -r name email; do
+    line="$name <$email>"
+
+    # Check for known email, or identical name
+    if ! grep -iqw "$email" "$tmp" && ! grep -iq "$name" "$tmp"; then
+        echo "$line" >>"$tmp"
+        echo "++ $line"
+    else
+        echo "   $line"
+    fi
+done
+
+LC_COLLATE=C sort -o "$tmp"{,}
+grep -v @ AUTHORS >>"$tmp"
+mv "$tmp" AUTHORS