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Re: What does NotebookDirectory[] do for .m files?

• To: mathgroup at smc.vnet.net
• Subject: [mg126088] Re: What does NotebookDirectory[] do for .m files?
• From: "Alexey Popkov" <lehin.p at gmail.com>
• Date: Mon, 16 Apr 2012 06:08:22 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <jm8qeg$ja9$1@smc.vnet.net> <jmdsop$ac3$1@smc.vnet.net>

"David Bailey" <dave at removedbailey.co.uk>: news:jmdsop$ac3$1 at smc.vnet.net...
> On 13/04/2012 10:08, Jesse Perla wrote:
>> NotebookDirectory[] correctly gives the location of the notebook for my 
>> .nb files, but I cannot seem to find an equivalent for my .m files?  Is 
>> there another approach?
>>
>
> There are two distinct cases here.
>
> If you open a .m file in the FrontEnd, it is treated like a notebook,
> and NotebookDirectory will work on it.
>
> If you use Get ( << ) to open the file, or it is opened because of a
> Needs command, then things get a bit trickier. While the .m file is
> being loaded in, $InputFileName is set to the name of the .m file, but
> not to the complete path!

It seems that in version 8.0.4 $InputFileName gives complete path to the 
.m-file. Evaluating

<< ExampleData/input.m

gives

$Input is ExampleData/input.m
$InputFileName is C:\Program Files\Wolfram 
Research\Mathematica\8.0\Documentation\English\System\ExampleData\input.m

while evaluating

FilePrint["ExampleData/input.m"]

gives

Print["$Input is ",$Input];
Print["$InputFileName is ",$InputFileName];