This is the command lua-any that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
lua-any - Helper script for multi-Lua-version shebang lines
Some Lua scripts work with multiple versions of Lua but not all of them. The upstream
author of the software may hence have chosen the loose shebang line:
In Debian /usr/bin/lua is a valid Lua interpreter but it is under the control of the user,
that can set its value to the Lua version of its choice, even one that is not able to run
the script in question.
lua-any is a helper that understands metadata written in comments and selects a valid Lua
-- Lua-Versions: 5.1 5.2
lua-any tests in turn the existence of lua5.1 and lua5.2 and executes the script with the
first existing interpreter.
lua-any looks only at the first 10 lines of the script for metadata, i.e. it processes the
file trough the head utility.
The format of a line is essentially key:value, where leading and trailing spaces are
removed from value. The key is matched in a case insensitive way. The Lua comment, --,
must have no leading spaces.
The following keys are supported:
Space separated list of Lua versions.
The common root of all interpreters. By default its value is /usr/bin/lua. Each Lua
version selected in Lua-Versions is simply appended to it in order to obtain the
full name of the interpreter.
Extra arguments to be passed to Lua interpreters, like -l lfs. By default this is
A package using lua-any should declare its dependencies on Lua interpreters using a
Depends: lua-any, lua5.1 | lua5.2
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