Re: Path to *.m file

*To*: mathgroup at smc.vnet.net*Subject*: [mg86529] Re: Path to *.m file*From*: David Bailey <dave at Remove_Thisdbailey.co.uk>*Date*: Thu, 13 Mar 2008 04:31:44 -0500 (EST)*References*: <fr0cr7$ekp$1@smc.vnet.net> <fr2mei$o2t$1@smc.vnet.net> <fr5e8e$odd$1@smc.vnet.net> <fr7onk$37d$1@smc.vnet.net>

Albert Retey wrote: > Hi, > >> I too would like a way to determine the path of a .m file while it is >> being loaded by Get. None of the replies provide a fool-proof way of >> doing this (e.g. in the not unusual case that you have two files with >> the same name in different directories). > > I absolutely agree with your wish that this information should be > available without any hacking but I think that there is no way to load a > file with Get which is not the first in FileNames[filename,$Path] > unless you use an absolute path for filename. The latter is easy to > handle and covered with the else condition in: > > Catch[If[ > FileType[$Input]=!=File, > First[FileNames[$Input,$Path]/.{}:>Throw[$Failed]], > $Input > ]] > > so I think the above construct should work for the case you named. > >> It would be nice if Wolfram >> Research added this to their 'to do' list! > > I'm sure you have seen the post of Carl Woll about an undocumented > private variable that holds that information. Looks like the people at > Wolfram found this information valuable, too, so it probably is only a > small effort to provide that information to the users/package developers > without hacks and workarounds. > > Sorry for the post with only marginal new information but maybe keeping > the thread alive convinces someone that we really want that little > information accessible :-) > > albert > Albert, I take your point, although technically there is still room for uncertainty because the .m could create a file of the same name somewhere earlier in the path. OK - I know that is a bit unlikely, but since this information is easily obtainable from the OS, it would be nice if Mathematica handed it on in a completely reliable way. David Bailey http://www.dbaileyconsultancy.co.uk