From e28703b7b8bf89ec444e7fc49311f14db80b1c89 Mon Sep 17 00:00:00 2001
From: Konstantin Zamyakin <sc@adguard.com>
Date: Wed, 31 Oct 2018 15:46:02 +0300
Subject: [PATCH] don't download filter rules if file already exists

---
 postinstall.sh | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/postinstall.sh b/postinstall.sh
index 41785b6..bf0e819 100644
--- a/postinstall.sh
+++ b/postinstall.sh
@@ -13,14 +13,20 @@ case "$1" in
                     --gecos "<%= project %> user" \
                     --shell /bin/bash "<%= user %>"
         fi
-        URL="https://filters.adtidy.org/android/filters/15.txt"
+
         OUTFILE="/var/lib/dnsfilter/dns.txt"
 
-        mkdir -p /var/lib/dnsfilter
-        wget -q --timeout=90 "$URL" -O "$OUTFILE"
-        if [ $? -ne 0 ]
-            then
-            echo "Filter rules could not be downloaded."
+        if [ ! -f "${OUTFILE}" ]; then
+            echo "${OUTFILE} does not exists. Downloading..."
+
+            URL="https://filters.adtidy.org/android/filters/15.txt"
+
+            mkdir -p /var/lib/dnsfilter
+            wget -q --timeout=90 "$URL" -O "$OUTFILE"
+            if [ $? -ne 0 ]
+                then
+                echo "Filter rules could not be downloaded."
+            fi
         fi
     ;;
     *)