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Re: Emacs on Mac 10.7 (Lion): how to get PATH as in terminal?


From: Marius Hofert
Subject: Re: Emacs on Mac 10.7 (Lion): how to get PATH as in terminal?
Date: Mon, 24 Oct 2011 01:16:49 +0200

Dear Perry,

thanks a lot for your kind and very quick help.

Cheers,

Marius

On 2011-10-24, at 01:15 , Perry Smith wrote:

> 
> On Oct 23, 2011, at 4:57 PM, Marius Hofert wrote:
> 
>> 
>> On 2011-10-23, at 23:17 , Perry Smith wrote:
>> 
>>> 
>>> On Oct 23, 2011, at 3:58 PM, Marius Hofert wrote:
>>> 
>>>> Hi,
>>>> 
>>>> I know this is an old problem, but I still couldn't figure it out with the 
>>>> tricks I found.
>>>> I work with the emacs 23.3 on Mac OS X 10.7.2 (Lion), installed from 
>>>> http://emacsformacosx.com/
>>>> When I open a shell with M-x shell and type echo $PATH, I get:
>>>> /usr/bin:/bin:/usr/sbin:/sbin
>>>> When I do the same in Mac's Terminal, I get:
>>>> /Applications/Emacs.app/Contents/MacOS/:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/usr/texbin:/opt/local/bin:/opt/local/sbin
>>>> 
>>>> Question: How do I get the same PATH in emacs than in the terminal?
>>>> 
>>>> Trials:
>>>> 
>>>> 1) fixpath.el:
>>>> (add-to-list 'load-path "~/.emacs.d/fixpath"); see 
>>>> https://svn.fsg.ulaval.ca/svn-pub/vgoulet/emacs-modified/macos/tags/Emacs-23.3-modified-3/fixpath.el
>>>> (require 'fixpath)
>>>> 
>>>> 2) emacs wiki (http://www.emacswiki.org/emacs/EmacsApp#toc2)
>>>> ;; add "defaults..." to /etc/profile:
>>>> if [ -x /usr/libexec/path_helper ]; then
>>>>      eval `/usr/libexec/path_helper -s`
>>>>      defaults write $HOME/.MacOSX/environment PATH "$PATH"
>>>> fi
>>>> ;; add the following to .emacs:
>>>> (add-to-list 'exec-path "/usr/bin")
>>>> 
>>>> 3) another solution posted on the emacs wiki page:
>>>> ;; read in PATH from .bashrc (and add at least those directories)
>>>> ;; see http://www.emacswiki.org/emacs/EmacsApp#toc5
>>>> (if (not (getenv "TERM_PROGRAM"))
>>>>  (setenv "PATH"
>>>>          (shell-command-to-string "source $HOME/.bashrc && printf $PATH")))
>>> 
>>> I did not download the emacs that you did and dig around so I am sorta half 
>>> guessing.
>>> 
>>> Recently while dinking with rvm, I discovered that bash is not being 
>>> started with --login.
>>> 
>>> Since the M-x shell has fewer parts in its path, I would suspect that the 
>>> additional
>>> paths are being specified in /etc/profile.  Without bash thinking it is a 
>>> login shell,
>>> /etc/profile is not being sourced.  One way is to start it with a - as the 
>>> first character in
>>> arg0.  The other way is to start it with --login.
>> 
>> Dear Perry,
>> 
>> thanks a lot for helping. 
>> 
>>> 
>>> To explore if this is right: find where the parts for longer path are being 
>>> set.  One
>>> choice is /etc/profile, another is your ~/.profile.  
>> 
>> sorry, I should have put this in earlier. So here is my /etc/profile [you 
>> still see the defaults write... from one of my trials]:
>> 
>> ### /etc/profile ###
>> 
>> # System-wide .profile for sh(1)
>> 
>> if [ -x /usr/libexec/path_helper ]; then
>>      eval `/usr/libexec/path_helper -s`
>>       defaults write $HOME/.MacOSX/environment PATH "$PATH"
>> fi
>> 
>> if [ "${BASH-no}" != "no" ]; then
>>      [ -r /etc/bashrc ] && . /etc/bashrc
>> fi
>> 
>> ###############
>> 
>> Here is ~/.profile [the last export is to call the same emacs when typing 
>> "emacs" in the Mac's terminal; otherwise, the preinstalled (old) emacs 
>> version is called]:
>> 
>> ### ~/.profile ###
>> 
>> [ -f ~/.bashrc ] && . ~/.bashrc;
>> 
>> # MacPorts Installer addition on 2011-09-30_at_10:26:19: adding an 
>> appropriate PATH variable for use with MacPorts.
>> export PATH=$PATH:/opt/local/bin:/opt/local/sbin
>> # Finished adapting your PATH environment variable for use with MacPorts.
>> 
>> # make /Applications/Emacs.app/Contents/MacOS/emacs available when calling 
>> "emacs"
>> export PATH=/Applications/Emacs.app/Contents/MacOS/:$PATH
>> 
>> ###############
>> 
>> 
>>> If these parts are in the profile but
>>> not in your .bashrc, then we are likely on the right track.
>> 
>> My .bashrc only contains some aliases and export LC_CTYPE=en_US.UTF-8 
>> 
>>> 
>>> If that is the case, then review explicit-bash-args.  You can customize 
>>> them and add --login
>>> see if that works.  I'm a bit surprised this isn't done in the stock 
>>> version of the code.
>> 
>> Thanks for the hint!!! I found this (see 
>> http://www-stat.wharton.upenn.edu/~buja/STAT-540/.emacs):
>> (setq explicit-bash-args (list "--login" "-i"))
>> I put it into .emacs and started emacs again. M-x shell now shows precisely 
>> the same PATH as in the terminal.
>> The only thing I'm wondering is: If this is really the perfect solution, why 
>> is it not mentioned on http://www.emacswiki.org/emacs/EmacsApp ? It seems to 
>> be much simpler than the other solutions posted, and (as I wrote) the other 
>> solutions even did not work for me. 
> 
> Yea.  I bumped into this recently.  I'm surprised that it does not kick off 
> the shell using "-sh" as argv[0] since some shells *only* grok that method of 
> starting a login shell.
> 
> I guess the emacs developers do not see *shell* as a "login" shell.
> 
> LIke you, I'm surprised.
> 
> pedz
> 





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