What's the Lua to get the current working directory on Windows XP SP3 (or to get the directory of the currently-running Lua file)? I prefer not to use LuaFileSystem.
I can't use os.execute("cd")
because os.execute
always starts from my home directory (and thus always yields C:\Documents and Settings\username
).
You should be able to get the currently-running lua file path with:
or
and then the current directory with a regex:
Edit: actually that only works if you're running your lua with the full path. e.g.: "lua.exe C:\test\test.lua" and NOT "lua.exe test.lua"
I haven't had time to test this, but have you tried os.getenv to read windows environment variables?
Windows has an environment variable for current directory: %CD%
Edit: Tested on Windows 7 and while other environment variables work (ie. %USERNAME% or %PROGRAMFILES%) the CD var returns nil
You could use alien to call out to GetCurrentDirectory in kernel32.dll, but that's probably not what you're looking for.
Lua by default doesn't have a "native" way of supporting the concept of "current directory", or, in fact, the concept of "directory".
The proper way to get the current directory is using a library that provides folder support. There are several - I recommend luafilesystem.
Once it is installed, you can get the current directory by executing:
This will work on windows, linux and mac.
Beware though that these external libraries usually involve some binary packages. Depending on your setup, you might have to compile it before being able to use it.
EDIT:
Note that when a file is included via
require
, then the expression{...}[1]
returns the path used by therequire
directive. It is not exactly the path because:.lua
at the end of the file.package.path
But if all you need is the "require-like path" of the file (maybe to require files next to it) then you can get it by doing this at the very beginning of the file:
If a file called
baz.lua
is required withrequire 'foo.bar.baz'
, thenPATH
will befoo.bar
.maybe some ugly hack like