Update check-version.sh script

check-version.sh

@@ -1,21 +1,8 @@
 #!/bin/bash
 
-# Gitlab repository
-REPO="xterm/xterm"
-
-# Replace slash with URL encoded representation
-REPO=$(echo "$REPO" | sed 's|/|%2F|g')
-
-# Get tag name using Gitlab Rest API
-TAG_NAME=$(curl -s -L https://gitlab.freedesktop.org/api/v4/projects/"$REPO"/repository/tags | jq -r '.[0].name')
-
-# Trim '-gitlab' suffix
-TAG_NAME=$(echo "$TAG_NAME" | sed 's/-gitlab//g')
+URL="https://invisible-island.net/archives/xterm/"
 
 # Get version number from tag name
-VERSION=$(echo "$TAG_NAME" | rev | cut -d'-' -f1 | rev)
-
-# Trim 'v' character in VERSION variable
-VERSION=$(echo "$VERSION" | tr -d 'v')
+VERSION=$(curl --silent "$URL" | grep -o -E 'xterm-[0-9]{1,}.tgz' | grep -o -E '[0-9]{1,}' | tail -n1)
 
 echo "$VERSION"