handle port conflict

scripts/install.sh

@@ -11,7 +11,7 @@ log() {
   echo -e "$(echo "$message" | sed 's/\\e\[[0-9;]*m//g')" >> "$TMP_LOG_FILE"
 }
 
-SCRIPT_VERSION="0.2.0"
+SCRIPT_VERSION="0.2.1"
 REPO="shocknet/Lightning.Pub"
 BRANCH="master"
 
@@ -31,6 +31,7 @@ log_error() {
 
 modules=(
   "utils"
+  "ports"
   "install_lnd"
   "install_nodejs"
   "install_lightning_pub"

scripts/install_lnd.sh

@@ -89,17 +89,33 @@ install_lnd() {
     # Create .lnd directory if it doesn't exist
     mkdir -p $USER_HOME/.lnd
 
-    # Check if lnd.conf already exists and avoid overwriting it
+    # Ensure lnd.conf exists.
-    if [ -f $USER_HOME/.lnd/lnd.conf ]; then
+    touch $USER_HOME/.lnd/lnd.conf
-      log "${PRIMARY_COLOR}lnd.conf already exists. Skipping creation of new lnd.conf file.${RESET_COLOR}"
+    
-    else
+    # Check for and add default settings only if the keys are missing.
-      cat <<EOF > $USER_HOME/.lnd/lnd.conf
+    grep -q "^bitcoin.mainnet=" $USER_HOME/.lnd/lnd.conf || echo "bitcoin.mainnet=true" >> $USER_HOME/.lnd/lnd.conf
-bitcoin.mainnet=true
+    grep -q "^bitcoin.node=" $USER_HOME/.lnd/lnd.conf || echo "bitcoin.node=neutrino" >> $USER_HOME/.lnd/lnd.conf
-bitcoin.node=neutrino
+    grep -q "^neutrino.addpeer=" $USER_HOME/.lnd/lnd.conf || echo "neutrino.addpeer=neutrino.shock.network" >> $USER_HOME/.lnd/lnd.conf
-neutrino.addpeer=neutrino.shock.network
+    grep -q "^fee.url=" $USER_HOME/.lnd/lnd.conf || echo "fee.url=https://nodes.lightning.computer/fees/v1/btc-fee-estimates.json" >> $USER_HOME/.lnd/lnd.conf
-fee.url=https://nodes.lightning.computer/fees/v1/btc-fee-estimates.json
+    
-EOF
+    chmod 600 $USER_HOME/.lnd/lnd.conf
-      chmod 600 $USER_HOME/.lnd/lnd.conf
+
+    # Port conflict resolution for fresh installs
+    if [ $lnd_status -eq 0 ]; then
+      local lnd_port=9735
+      if ! is_port_available $lnd_port; then
+        if ! systemctl --user -q is-active lnd.service >/dev/null 2>&1; then
+          log "Port $lnd_port is in use by another process. Finding an alternative port."
+          lnd_port_new=$(find_available_port $lnd_port)
+          log "Configuring LND to use port $lnd_port_new."
+          
+          # Remove any existing listen entry and add the new one.
+          sed -i '/^listen=/d' $USER_HOME/.lnd/lnd.conf
+          echo "listen=:$lnd_port_new" >> $USER_HOME/.lnd/lnd.conf
+        else
+          log "Port $lnd_port is in use, but it seems to be by our own lnd service. No changes made."
+        fi
+      fi
     fi
 
     log "${SECONDARY_COLOR}LND${RESET_COLOR} installation and configuration completed."

scripts/ports.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# --- Port Management ---
+
+# Finds an available TCP port, starting from a given base port.
+# If the base port is in use, it increments until a free port is found.
+#
+# @param base_port The starting port number.
+# @return The first available port number.
+find_available_port() {
+  local port=$1
+  while ! is_port_available "$port"; do
+    log "Port $port is in use. Checking next port..."
+    port=$((port + 1))
+  done
+  echo "$port"
+}
+
+# Checks if a given TCP port is available.
+#
+# @param port The port number to check.
+# @return 0 if the port is available, 1 otherwise.
+is_port_available() {
+  local port=$1
+  if [[ "$OS" == "Mac" ]]; then
+    # Use lsof on macOS
+    ! lsof -iTCP:"$port" -sTCP:LISTEN -P -t >/dev/null
+  else
+    # Use ss on Linux
+    ! ss -lntu | awk '{print $5}' | grep -q ":$port$"
+  fi
+}