interactive luash

repl_demo.luash

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+#!/usr/bin/env luash
+-- REPL Demo: Showcasing interactive features
+
+print("🎮 Luash Interactive Shell Demo")
+print("===============================\n")
+
+print("Luash now supports a full interactive REPL!")
+print("Start it with: ./luash -i")
+print()
+
+print("🔥 REPL Features:")
+print("✓ All luash preprocessing ($VAR, `commands`, #{interpolation})")
+print("✓ Multiline input (functions, loops, if blocks)")
+print("✓ Command history")
+print("✓ Special dot commands (.help, .exit, .clear, .history)")
+print("✓ Real-time expression evaluation")
+print()
+
+print("📝 Example REPL Session:")
+examples = {
+    'print("Hello " .. $USER)',
+    '$GREETING = "Hello from REPL"',
+    'files = `ls *.luash | wc -l`',
+    'print("Found " .. files .. " luash files")',
+    'host = "google.com"',
+    'status = `ping -c 1 #{host} >/dev/null && echo "ok"`',
+    'print(host .. " is " .. status)',
+    '',
+    '-- Multiline example:',
+    'for i = 1, 3 do',
+    '  print("Iteration: " .. i)',
+    'end',
+    '',
+    '-- Function definition:',
+    'function greet(name)',
+    '  return "Hello, " .. name .. "!"',
+    'end',
+    '',
+    'print(greet($USER))'
+}
+
+for i, example in ipairs(examples) do
+    if example == "" then
+        print()
+    elseif example:match("^%-%-") then
+        print(example)
+    else
+        print("luash> " .. example)
+    end
+end
+
+print()
+print("🚀 Try it now: ./luash -i")
+print("   Or run: ./luash_shell.lua")
+print()
+
+print("💡 The REPL supports:")
+print("   • Environment variables: $HOME, $USER, etc.")
+print("   • Shell commands: `ls`, `pwd`, `date`")
+print("   • Variable interpolation: `echo #{variable}`") 
+print("   • Interactive commands: !git status")
+print("   • Full Lua: functions, loops, tables, etc.")
+print("   • Command history and editing")
+print()
+
+print("✨ Perfect for:")
+print("   • Interactive system administration")
+print("   • Exploring file systems and processes")
+print("   • Quick shell command prototyping")
+print("   • Learning luash syntax")
+print("   • Debugging shell scripts")