From 947b3f33abadfd3171ec42252ff018c2ebd69e22 Mon Sep 17 00:00:00 2001
From: Anton Agestam <anton.agestam@aiven.io>
Date: Wed, 22 Mar 2023 10:17:28 +0100
Subject: [PATCH] fix: Use regular grep for copyright check

---
 .pre-commit-config.yaml |  6 ++----
 copyright.sh            | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+), 4 deletions(-)
 create mode 100755 copyright.sh

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 3c7c9ee9a..8894178d1 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -17,10 +17,8 @@ repos:
     name: copyright
     language: system
     types: [ python ]
-    pass_filenames: false
-    # Lists the Python files that do not have an Aiven copyright. Exits with a
-    # non-zero exit code if any are found.
-    entry: bash -c "! git grep -ELm1 'Copyright \(c\) 20[0-9]{2} Aiven' -- '*.py' ':!*__init__.py'"
+    exclude: __init__\.py
+    entry: ./copyright.sh
 
 - repo: https://github.com/shellcheck-py/shellcheck-py
   rev: v0.9.0.2
diff --git a/copyright.sh b/copyright.sh
new file mode 100755
index 000000000..fee10b22d
--- /dev/null
+++ b/copyright.sh
@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+missing_copyright=$(
+    grep \
+        --extended-regexp \
+        --files-without-match \
+        --max-count=1 \
+        'Copyright \(c\) 20[0-9]{2} Aiven' \
+        -- "$@"
+)
+
+if [[ -n $missing_copyright ]]; then
+    echo "💥 There are files missing required copyright statement."
+    echo "$missing_copyright"
+    exit 1
+else
+    echo "✅ All files have required copyright statement."
+fi