Functions and Variables

Premake adds a number of functions and variables to the standard Lua runtime environment.

`addoption(option, desc)`	Document a supported command-line option. See Options and Commands
`dopackage(path)`	Calls an external package script.
`matchdirs(pattern, ...)`	Returns a list of directories that match the provided set of patterns.
`matchfiles(pattern, ...)`	Returns a list of files that match the provided set of patterns.
`matchrecursive(pattern, ...)`	Like matchfiles(), but recurses into subdirectories.
`newpackage()`	Creates a new, empty package.
`os.appendfile(src, dest)`	Append one file to another.
`os.chdir(path)`	Change the current working directory.
`os.copyfile(src, dest)`	Copy a file.
`os.direxists(filename)`	Checks for the existence of a directory.
`os.fileexists(filename)`	Checks for the existence of a file.
`os.findlib(library)`	Searches for a library file on the system. If found, returns the path to the library.
`os.getcwd()`	Returns the current working directory.
`os.mkdir(path)`	Creates a new directory on the disk.
`os.rmdir(path)`	Removes a directory from the disk.
`path.getbasename(path)`	Gets the filename from a path, with no fileextension.
`path.getdir(path)`	Gets the directory name from a full path.
`path.getextension(path)`	Gets the file extension.
`path.getname(path)`	Gets the filename from a full path.

`bsd`	Set to true if running on a BSD system
`linux`	Set to true if running on a Linux system.
`macosx`	Set to true if running on a MacOS X system
`options`	A list of the options encountered on the command-line. See Options and Commands, above.
`OS`	A string representing the current operating system. Values include “windows”, “linux”, “freebsd”, “netbsd”, “openbsd”, and “macosx”.
`target`	The current target toolset, as set with the `--target` command-line flag.
`windows`	Set to true if running on a MS Windows system.

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