From 51e952e551591c258d732c8f4f22901fb18014a3 Mon Sep 17 00:00:00 2001
From: Alex Macdonald <aptmac@openjdk.org>
Date: Fri, 1 Dec 2023 22:30:09 +0000
Subject: [PATCH] 7449: Add GitHub action to verify copyright year

Reviewed-by: hirt, clanger
---
 .github/workflows/validate.yml | 12 ++++++++++++
 scripts/checkcopyrightyear.sh  | 27 +++++++++++++++++++++++++++
 2 files changed, 39 insertions(+)
 create mode 100755 scripts/checkcopyrightyear.sh

diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index f31991a321..f9757ace92 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -41,6 +41,18 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  check_copyright_year:
+    runs-on: 'ubuntu-latest'
+    defaults:
+      run:
+       shell: bash
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - name : Check latest copyright year
+      run: ./scripts/checkcopyrightyear.sh
   build_and_test:
     name: Build and Test on ${{ matrix.os }}
     strategy:
diff --git a/scripts/checkcopyrightyear.sh b/scripts/checkcopyrightyear.sh
new file mode 100755
index 0000000000..d5a1a3a0c7
--- /dev/null
+++ b/scripts/checkcopyrightyear.sh
@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+CURRENT_YEAR=$(date +'%Y')
+MODIFIED_FILES=$(git diff --name-only origin/master)
+counter=0
+
+for fileToCheck in $MODIFIED_FILES
+do
+    if [[ ($fileToCheck =~ .*\.java) || ($fileToCheck =~ .*\.htm) || ($fileToCheck =~ pom.xml) || ($fileToCheck =~ .*\.properties) ]]
+    then
+        LATEST=$(sed -n "s/^.*Copyright (c).\+\(20[[:digit:]]\{2\}\).*$/\1/p" $fileToCheck)
+        for year in $LATEST; do
+            if [ $year -ne $CURRENT_YEAR ]
+            then
+                counter=$((counter + 1))
+                echo "Requires update: $fileToCheck"
+            fi
+        done
+    fi
+done
+if [ $counter -ne 0 ]
+then
+    echo "There is a total of $counter copyright year(s) that require updating."
+    exit 1
+else
+    exit 0
+fi