Tlua is a task runner for Lua that simplifies running and reusing small bits of useful code. It lets you very easily build a command-line interface for running scripts in a project.
It is in some ways conceptually similar to Rake, but is oriented exclusively towards task running rather replacing Makefiles, and doesn't require a special file format or DSL - it's just plain Lua.
Use TLua to run project tasks such as:
- Invoking tests
- Archiving files for a rock
- Generating Luadocs
- Populating a database with sample data
Tlua looks for functions in a file named
LuaTasks.lua in your current
directory, and also in a directory named
.tlua in your home directory. The
~/.tlua can be in any heirachy and have any name, as long as they
have the extension
Here's an example
--- A "hello world" function for tlua. -- Looks for a greeting in params, or defaults to "hello". -- Looks for a person in params.to, or defaults to "world". -- Example: tlua say olá to:João local function sample_func() local params = tlua.get_params() local greeting = params or "hello" local who = params.to or "world" print(string.format("%s %s!", greeting, who)) end tlua.task("say", "Say a greeting", sample_func)
You can then invoke this task on the command line:
$ tlua say hello to:John hello John!
Any function can be used as a task, as long as it does not require arguments. If you want to make a function that requires arguments into task, you can simply wrap it in a Tlua task that parses the parameters in the apropriate way:
local function test_match() local params = tlua.get_params() print(string.match(params, params)) end tlua.task("string.match", "Print the result of string.match", test_match)
Then, invoke the example:
$ tlua string.match 'email@example.com' '.*@(.*)' example.com
You can also set a default task:
tlua.default_task = "my.new.default.task"
Now when you invoke
tlua with no arguments, your default task will be run
rather than the help task.
To see what tasks you have available, use
$ tlua list System tasks: ------------- help Show this message list List all tasks User tasks: ----------- clean Clean up project directory docs Run Luadoc for the Tlua project test Run tests
By adding tasks to files in your ~/.tlua directory, you can save useful code snippets from the Lua Users Wiki. This makes tlua sort of like Luarocks, but for functions rather than applications:
require 'tlua' local split = tlua.get_task("ricci.lakes.split")
Install via Luarocks, or download and copy to the location you desire. At the moment, the best way to install via Luarocks is:
sudo luarocks build http://github.com/norman/tlua/raw/master/tlua-scm-1.rockspec
Norman Clarke - firstname.lastname@example.org
Copyright (c) 2010 Norman Clarke
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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