A code formatter for Lua 5.1, written in Lua 5.1.

Usage:

To print the formatted version to standard out:

lua luafmt.lua <lua file> [max column hint=80]

To update the Lua file in place:

lua luafmt.lua --f <lua file> [max column hint=80]

luafmt.lua in this repository is formatted using itself.

• No multiple blank lines in a row
• No spaces on blank lines
• Spaces around operators and assignment
• Space around string and table calls: print {}, print ""
• Space after commas: return {1, 2}
• Indentation using tabs for both scope and overflowed lines
• Blank lines above comments
• No blanks at the beginning or ends of blocks

A bash script like the following can be used to reformat all .lua files in a directory:

 for f in *.lua ; do lua luafmt.lua --f "$f" ; done

Scripts which are not syntactically correct may not be formattable. The script will output an error and not modify the file.

Run lua test.lua from the project directory to run tests.

Right now, there are only a couple of tests.