cleanup structure

examples/07_interactive_demo.luash

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+#!/usr/bin/env luash
+-- Interactive Luash Demo/REPL Alternative
+-- Shows how to build interactive features within luash
+
+print("🚀 Luash Interactive Demo")
+print("This demonstrates interactive capabilities in luash")
+print()
+
+-- Simple command processor
+function process_command(cmd)
+    cmd = cmd:match("^%s*(.-)%s*$") -- trim
+    
+    if cmd == "help" then
+        print([[
+Available commands:
+  sysinfo    - Show system information
+  files      - List files in current directory  
+  env        - Show environment variables
+  network    - Test network connectivity
+  processes  - Show running processes
+  disk       - Show disk usage
+  quit       - Exit
+  
+Or type any luash expression!]])
+    
+    elseif cmd == "sysinfo" then
+        print("System Information:")
+        print("  OS: " .. `uname -s`)
+        print("  Architecture: " .. `uname -m`) 
+        print("  Hostname: " .. `hostname`)
+        print("  User: " .. $USER)
+        print("  Uptime: " .. `uptime`)
+        
+    elseif cmd == "files" then
+        print("Files in current directory:")
+        files = `ls -la`
+        print(files)
+        
+    elseif cmd == "env" then
+        print("Key environment variables:")
+        print("  USER: " .. $USER)
+        print("  HOME: " .. $HOME)
+        print("  SHELL: " .. $SHELL)
+        print("  PATH: " .. `echo $PATH | cut -d: -f1-3`)
+        
+    elseif cmd == "network" then
+        print("Network connectivity test:")
+        hosts = {"google.com", "github.com"}
+        for i = 1, #hosts do
+            local host = hosts[i]
+            local result = `ping -c 1 #{host} >/dev/null 2>&1 && echo "ok" || echo "fail"`
+            local status = result == "ok" and "✓" or "✗"
+            print("  " .. status .. " " .. host)
+        end
+        
+    elseif cmd == "processes" then
+        print("Top processes:")
+        !ps aux | head -10
+        
+    elseif cmd == "disk" then
+        print("Disk usage:")
+        !df -h
+        
+    elseif cmd == "quit" or cmd == "exit" then
+        return false
+        
+    else
+        -- Try to execute as luash code
+        if cmd ~= "" then
+            print("Executing: " .. cmd)
+            -- In a real REPL, we'd eval this
+            -- For demo, just show some dynamic examples
+            if cmd:match("^%$") then
+                print("Environment variable assignment")
+            elseif cmd:match("`.*`") then
+                print("Shell command execution")  
+            else
+                print("Lua expression")
+            end
+        end
+    end
+    
+    return true
+end
+
+-- Main interaction loop
+print("Type 'help' for commands, 'quit' to exit")
+print()
+
+-- Simulate some interactive commands
+commands = {
+    "help",
+    "sysinfo", 
+    "files",
+    "network",
+    "quit"
+}
+
+for i = 1, #commands do
+    local cmd = commands[i]
+    print("luash> " .. cmd)
+    
+    if not process_command(cmd) then
+        break
+    end
+    
+    if i < #commands then
+        print("\nPress Enter to continue...")
+        io.read() -- Wait for user input
+    end
+end
+
+print("\n✨ This shows how luash can build interactive applications!")
+print("For a full REPL, we'd:")
+print("  - Read input in a loop")
+print("  - Parse and execute luash expressions")  
+print("  - Handle multiline input")
+print("  - Maintain command history")