create an update script, that can be run from the installation folder…

… to pull the latest or other releases without copying all steps manually

update.sh

@@ -0,0 +1,84 @@
+# Set the repository name and username
+REPO="henne49/dbus-opendtu"
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+
+# delete old logs if they exist  
+if [ -f $SCRIPT_DIR/current.log ]; then  
+    rm $SCRIPT_DIR/current.log*  
+fi
+
+# Check if the current folder has enough space for 5MB
+FREE_SPACE=$(df . | tail -1 | awk '{ print $4 }' | sed 's/[A-Za-z]//g' | awk '{ printf("%.0f\n", $1 / 1024) }')
+
+if [ $FREE_SPACE -lt 5 ]; then
+  echo "Error: Not enough free space in the current folder. Need at least 5MB."
+  exit 1
+fi
+
+# Ask the user for the version to download, defaulting to "latest"
+echo "Enter the version to download (e.g. main, v1.2.25, pre-release, or press enter for latest):"
+read VERSION
+
+# If no version is specified, default to "latest"
+if [ -z "$VERSION" ]; then
+  VERSION="latest"
+fi
+
+# Check if the user wants to download the latest version
+if [ "$VERSION" = "latest" ]; then
+  # Fetch the latest release information from the GitHub API
+  # and extract the latest tag name using awk
+  # Assuming GitHub API returns the latest release tag in the format "vX.X.X"
+  LATEST_TAG=$(curl -s https://api.github.com/repos/$REPO/releases/latest | 
+               awk -F'"' '/tag_name/{print $4}')
+  TAG=$LATEST_TAG
+else
+  # Check if the user wants to download a pre-release version
+  if [ "$VERSION" = "pre-release" ]; then
+    # Fetch the latest pre-release information from the GitHub API
+    # and extract the latest pre-release tag name using awk
+    # Assuming GitHub API returns pre-release tags in the format "vX.X.X-rc.X" or "vX.X.X-beta.X"
+    PRE_RELEASE_TAG=$(curl -s https://api.github.com/repos/$REPO/releases | 
+                      awk -F'"' '/tag_name/{print $4}' | 
+                      grep -vE '^v[0-9]+\.[0-9]+\.[0-9]+$')
+    TAG=$PRE_RELEASE_TAG
+  else
+    # Use the specified version as the tag
+    # Assuming the version is in the format "vX.X.X"
+    TAG=$VERSION
+  fi
+fi
+
+# Download the zip file for the specified tag
+wget -O $TAG.zip https://github.com/$REPO/archive/$TAG.zip || { echo "version does not exist"; exit 1; }
+
+# Unzip the downloaded file
+unzip $TAG.zip
+
+# Check if the TAG string starts with 'v'
+if [[ $TAG =~ ^v ]]; then
+  # If it starts with 'v', remove the first character and return the result
+  EXTRACT_FOLDER="dbus-opendtu-${TAG:1}"
+else
+  EXTRACT_FOLDER="dbus-opendtu-$TAG"
+fi
+
+echo $EXTRACT_FOLDER
+
+# Copy all files from the extract folder to the main folder
+cp -R $EXTRACT_FOLDER/* .
+
+# Delete zip file
+rm $TAG.zip
+
+# Delete Extract Folder
+rm -rf $EXTRACT_FOLDER
+
+# Make all shell scripts executable
+chmod a+x $SCRIPT_DIR//*.sh
+
+#restart the service
+$SCRIPT_DIR/restart.sh
+
+#install the service
+$SCRIPT_DIR/install.sh