feat: add autoupdate for cwctl (#8108)

- During cwctl --upgrade, check for the latest version of cwctl from master branch
- Upgrade cwctl if a newer version is found

VERSION_CWCTL

@@ -1 +1 @@
-2.5.0
+2.6.0

deployment/setup_20.04.sh

@@ -2,7 +2,7 @@
 
 # Description: Install and manage a Chatwoot installation.
 # OS: Ubuntu 20.04 LTS
-# Script Version: 2.5.0
+# Script Version: 2.6.0
 # Run this script as root
 
 set -eu -o errexit -o pipefail -o noclobber -o nounset
@@ -19,7 +19,7 @@ fi
 # option --output/-o requires 1 argument
 LONGOPTS=console,debug,help,install,Install:,logs:,restart,ssl,upgrade,webserver,version
 OPTIONS=cdhiI:l:rsuwv
-CWCTL_VERSION="2.5.0"
+CWCTL_VERSION="2.6.0"
 pg_pass=$(head /dev/urandom | tr -dc A-Za-z0-9 | head -c 15 ; echo '')
 CHATWOOT_HUB_URL="https://hub.2.chatwoot.com/events"
 
@@ -187,7 +187,7 @@ function install_dependencies() {
       postgresql-client redis-tools \
       nodejs yarn patch ruby-dev zlib1g-dev liblzma-dev \
       libgmp-dev libncurses5-dev libffi-dev libgdbm6 libgdbm-dev sudo \
-      libvips
+      libvips python3-pip
 }
 
 ##############################################################################
@@ -770,6 +770,7 @@ function upgrade_node() {
 #   None
 ##############################################################################
 function upgrade() {
+  cwctl_upgrade_check
   get_cw_version
   echo "Upgrading Chatwoot to v$CW_VERSION"
   sleep 3
@@ -912,6 +913,62 @@ function version() {
   echo "cwctl v$CWCTL_VERSION beta build"
 }
 
+##############################################################################
+# Check if there is newer version of cwctl and upgrade if found
+# Globals:
+#   CWCTL_VERSION
+# Arguments:
+# remote_version_url = URL to fetch the remote version from
+# remote_version = Remote version of cwctl
+# Outputs:
+#   None
+##############################################################################
+function cwctl_upgrade_check() {
+    echo "Checking for cwctl updates..."
+
+    local remote_version_url="https://raw.githubusercontent.com/chatwoot/chatwoot/master/VERSION_CWCTL"
+    local remote_version=$(curl -s "$remote_version_url")
+
+    #Check if pip is not installed, and install it if not
+    if ! command -v pip3 &> /dev/null; then
+        echo "Installing pip..."
+        apt install -y python3-pip
+    fi
+
+    # Check if packaging library is installed, and install it if not
+    if ! python3 -c "import packaging.version" &> /dev/null; then
+        echo "Installing packaging library..."
+        python3 -m pip install packaging
+    fi
+
+    needs_update=$(python3 -c "from packaging import version; v1 = version.parse('$CWCTL_VERSION'); v2 = version.parse('$remote_version'); print(1 if v2 > v1 else 0)")
+
+    if [ "$needs_update" -eq 1 ]; then
+        echo "Upgrading cwctl from $CWCTL_VERSION to $remote_version"
+        upgrade_cwctl
+        echo $'\U0002713 Done'
+        echo $'\U0001F680 Please re-run your command'
+        exit 0
+    else
+        echo "Your cwctl is up to date"
+    fi
+
+}
+
+
+##############################################################################
+# upgrade cwctl
+# Globals:
+#   None
+# Arguments:
+#   None
+# Outputs:
+#   None
+##############################################################################
+function upgrade_cwctl() {
+    wget https://get.chatwoot.app/linux/install.sh -O /usr/local/bin/cwctl > /dev/null 2>&1 && chmod +x /usr/local/bin/cwctl
+}
+
 ##############################################################################
 # main function that handles the control flow
 # Globals: