From 295cf322b17a2e0f46b712d12123c418e294c28b Mon Sep 17 00:00:00 2001
From: Eugene Syromyatnikov <evgsyr@gmail.com>
Date: Sat, 26 Aug 2017 00:28:45 +0200
Subject: [PATCH] update_copyright_years.sh: workaround for old git versions

Old git versions (like the one shipped in Debian 8) do not support setting
date format with --date, working this around by processing git log output
with date +%Y.

* main/update_copyright_years.sh (process_file) <first_commit_year,
last_commit_year>: Change format to format:%aD, remove --date, supply
output as a -d option argument to date +%Y.
---
 maint/update_copyright_years.sh | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/maint/update_copyright_years.sh b/maint/update_copyright_years.sh
index 74442455..b12566af 100755
--- a/maint/update_copyright_years.sh
+++ b/maint/update_copyright_years.sh
@@ -111,10 +111,10 @@ process_file()
 		continue
 	fi
 
-	last_commit_year=$(git log -n1 --format=format:%ad \
-		--date=format:%Y -- "$f")
-	first_commit_year=$(git log --reverse --format=format:%ad \
-		--date=format:%Y -- "$f" | head -n 1)
+	last_commit_year=$(date +%Y -d "$(git log -n1 --format=format:%aD \
+		-- "$f")")
+	first_commit_year=$(date +%Y -d "$(git log --reverse --format=format:%aD \
+		-- "$f" | head -n 1)")
 	copyright_year=$(printf '%s' "$copyright_year_raw" |
 		sort -r -n | head -n 1)
 	start_note='from git log'
-- 
2.40.0