Re: Recommended way to get file directory

[Axel Kittenberger <axkibe@...>]

How about simply the good old environment variable?
If its not preset the parent script can set it for subscripts from its
starting directory (argv[0]), if its preset by the user, that one is
done.
Many Applications do it that way

On Thu, Feb 24, 2011 at 12:12 PM, Gaspard Bucher <gaspard@teti.ch> wrote:
> The problem lies in nested scripts that do not (and should not) know the
> absolute position of the required sub-scripts (relative to "/" or to the
> running application). This provides a very robust loading system without
> risks for filename clashes.
> G.
> On Thu, Feb 24, 2011 at 11:51 AM, Wesley Smith <wesley.hoke@gmail.com>
> wrote:
>>
>> When you load the file in your app, do you already have the absolute
>> path?  If so, why not just make a global var with the directory in it?
>>
>>
>> You could do something like:
>>
>> dofile(script.path.."/other_file.lua")
>>
>> wes
>>
>>
>>
>>
>> On Thu, Feb 24, 2011 at 2:49 AM, Gaspard Bucher <gaspard@teti.ch> wrote:
>> > I have found a better solution with debug.getinfo:
>> > -- Find the source of the current file.
>> > function lk.source(level)
>> >   local level = level or 0
>> >   return debug.getinfo(level + 2).source
>> > end
>> > -------------------------------- lk.dir()
>> > -- Find the directory of the current file.
>> > function lk.dir(level)
>> >   local level = level or 0
>> >   local source = string.gsub(lk.source(level+1), '/[^/]+$', '')
>> >   return string.match(source, '^@(.*)$')
>> > end
>> >
>> > On Thu, Feb 24, 2011 at 11:06 AM, Gaspard Bucher <gaspard@teti.ch>
>> > wrote:
>> >>
>> >> Hi list,
>> >> To ease installation and improve stability when moving scripts around,
>> >> I
>> >> need to load Lua files relative to the current file. What I basically
>> >> need
>> >> is a local FILE_DIR variable set to the file's directory.
>> >> My solution involves inserting a "local FILE_DIR" at the top of the
>> >> files
>> >> on file load but I wonder if there is a better way to solve this
>> >> problem...
>> >> Gaspard
>> >> Typical usage script:
>> >> ================ foo_test.lua
>> >> require 'lubyk'
>> >> FILE_DIR = FILE_DIR or lfs.currentdir() -- in case the file is run
>> >> alone
>> >> ...
>> >> function should.do_this_and_that()
>> >>   local fixture = fixture.readall(FILE_DIR, 'xxx.txt')
>> >> end
>> >> ================
>> >> ================ lk.dofile
>> >> function lk.dofile(filepath)
>> >>   local abs_path = filepath
>> >>   local cur_path = lfs.currentdir()
>> >>   if not string.match(abs_path, '^/') then
>> >>     abs_path = string.format('%s/%s', cur_path, filepath)
>> >>   end
>> >>   ----------- FILE_DIR hack -----------
>> >>   local code_str = string.format("local FILE_DIR = '%s';%s",
>> >> string.gsub(abs_path, '/[^/]+$', ''), lk.readall(abs_path))
>> >>   local code = assert(loadstring(code_str))
>> >>   code()
>> >> end
>> >> ================
>> >
>
>