MoonScript Files

New Features

Command Line Improvements

• Switched from alt_getopt to argparse - Both moon and moonc now use argparse for argument parsing, providing better help messages via --help and more robust option handling
• Added -e/--execute flag to moon - Execute MoonScript code directly from the command line: moon -e "print 'Hello World'"
• New --transform option for moonc - Allows custom AST transformations before compilation by specifying a module that receives and returns the syntax tree
• Improved - (stdin) handling - Now properly enforces that - must be the only argument

moonc Option Renames

• -w is now also available as --watch
• -l is now also available as --lint
• -t is now also available as --output-to

New Tools

• moon-tags - New script for generating ctags-compatible tag files for MoonScript, with support for:
• Class definitions
• Class methods
• Top-level function definitions (exported via {:func} pattern)
• Lapis route detection (--lapis flag)
• Optional line numbers (--include-line flag)
• Optionally skip header (--no-header flag)

Utility Improvements

• moon.p() now prints multiple arguments - Pass multiple values and each will be dumped
• util.dump shows class names - When dumping objects, the class name is displayed (e.g., <MyClass>{...})

Compiler Enhancements

• Lua keyword property access on self - Properties with Lua keyword names (like @then or @@then) now compile correctly using bracket notation instead of invalid self.then

Bug Fixes

• Fixed ambiguous Lua generation after import - Semicolons are now correctly inserted when the next line starts with (, preventing parsing ambiguity
• Fixed update operators with complex chain indexes - Expressions like a[func()].x += 1 now correctly lift the index expression to avoid double evaluation
• Exit with proper error code - moon now exits with code 1 when the executed script fails
• Fixed moonc - - Reading from stdin now works correctly
• Removed accidental debug print - Removed stray print file, time in watcher code
• dump.tree returns string - Now returns the string instead of printing directly
• Removed noisy "Built" message - Single file compilation no longer prints "Built" to stderr

Internal Changes

• Migrated CI from Travis to GitHub Actions
• Added comprehensive compiler and transform specs
• Improved binary building workflow for Windows and Linux
• Better error messages for invalid destructure assignments
• Updated splat.moon to use argparse, added --strip-prefix option