From be208e095f86333399660ff88ca810faf88f63b9 Mon Sep 17 00:00:00 2001
From: Amanda McCann <amanda@technomancy.org>
Date: Mon, 19 Feb 2024 13:13:32 +0100
Subject: [PATCH] stop curl from printing a warning when this is run for the
 first time

---
 CHANGELOG.md      | 1 +
 get-shapefiles.sh | 6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6cde460..275d859 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## Unreleased
 
 * Data URLs updated
+* get-shapefiles doens't print warning on first run
 
 ## 1.0.0 (2023-03-28)
 
diff --git a/get-shapefiles.sh b/get-shapefiles.sh
index 64eaa3f..450beeb 100755
--- a/get-shapefiles.sh
+++ b/get-shapefiles.sh
@@ -8,7 +8,11 @@ function download_and_extract {
     START_DIR=$(pwd)
     cd data
     echo "Downloading $URL"
-    curl -z "$FILE" -LO "$URL"
+	CURL_TIME_COND_ARG="$FILE"
+	if [ ! -e "$FILE" ] ; then
+		CURL_TIME_COND_ARG="1 Jan 1970 00:00:00"
+	fi
+    curl --time-cond "$CURL_TIME_COND_ARG" -LO "$URL"
     unzip -o -u "$FILE"
     cd "$START_DIR"
 }