Manual Pages  — STYLE.LUA

-- $FreeBSD: releng/12.4/share/man/man9/style.lua.9 333419 2018-05-09 16:52:28Z kevans $

config = require("config");
menu = require("menu");
password = require("password");
-- One blank line following the module require block

Indentation and wrapping should match the guidelines provided by style(9). Do note that it is ok to wrap much earlier than 80 columns if readability would otherwise suffer.

Where possible, s:method(...) is preferred to method(s, ...). This is applicable to objects with methods. String are a commonly-used example of objects with methods.

Testing for nil should be done explicitly, rather than as a boolean expression. Single-line conditional statements and loops should be avoided.

local variables should be preferred to global variables in module scope. internal_underscores tend to be preferred for variable identifiers, while camelCase tends to be preferred for function identifiers.

If a table definition spans multiple lines, then the final value in the table should include the optional terminating comma. For example:

-- No terminating comma needed for trivial table definitions
local trivial_table = {1, 2, 3, 4}

local complex_table = {
        {
                id = "foo",
                func = foo_function, -- Trailing comma preferred
        },
        {
                id = "bar",
                func = bar_function,
        },      -- Trailing comma preferred
}

This reduces the chance for errors to be introduced when modifying more complex tables.

Multiple local variables should not be declared and initialized on a single line. Lines containing multiple variable declarations without initialization are ok. Lines containing multiple variable declarations initialized to a single function call returning a tuple with the same number of values is also ok.

Initialization should be done at declaration time as appropriate.