improvements to install script

src/install

@@ -6,14 +6,26 @@ MAGENTA="\033[35m"
 CYAN="\033[36m"
 RESET="\033[0m"
 
+# Check if $LOCAL_BIN exists and create it if it does not
+[ ! -d "$LOCAL_BIN" ] && mkdir -p "$LOCAL_BIN"
+
+# Notify user that roc-start build process is starting
 echo -e "Building ${MAGENTA}roc-start${RESET}...\n"
 roc build --output roc-start --optimize > /dev/null 2>&1
+
+# If build succeeds, copy the executable to $LOCAL_BIN and notify user
 if [ $? -eq 0 ]; then
     cp ./roc-start $LOCAL_BIN
     echo -e "${MAGENTA}roc-start${RESET} installed to $LOCAL_BIN"
 fi
 
+# Check if the GitHub CLI (gh) is installed
 if ! command -v gh > /dev/null 2>&1; then
     echo -e "${YELLOW}- NOTE: ${MAGENTA}roc-start${RESET} requires ${CYAN}gh${RESET} to be installed. Please install the GitHub CLI: https://cli.github.com"
     exit 1
-fi
+fi
+
+# Check if $LOCAL_BIN is in the PATH
+if [[ ":$PATH:" != *":$LOCAL_BIN:"* ]]; then
+    echo -e "${YELLOW}- NOTE:${RESET} $LOCAL_BIN is not in your PATH. Please make sure to add it to your shell's configuration file (e.g. ~/.zshrc, ~/.bashrc, etc.)"
+fi