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PORunning gvim from MSYS --- how to avoid/change MSYS enviroment variables?
 

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  1. PORunning gvim from MSYS --- how to avoid/change MSYS enviroment variables?
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    <p>When I run <code>gvim</code> from MSYS, things go wrong during initialization. Namely, <code>gvim</code> can't find the initialization files that are in '<code>C:\Documents and Settings\username\vimfiles</code>.</p> <p>[Specifically, gvim reports the error <code>E117: Unknown function: pathogen#infect</code> during initialization, so it never found <code>autoload\pathogen.vim</code>. Doing <code>:scriptnames</code> also confirms that none of the setup files from <code>vimfiles\</code> are run.]</p> <p>I think I've debugged why it goes wrong. When you start MSYS, the MSYS shell inherits the windows enviroment variables, but changes some of them to it's custom values. <code>C:\Documents and Settings\username</code> is the value of <code>$HOME</code> in Windows, but MSYS sets it to something like <code>C:/msys/user name</code>. And of course, Vim uses <code>$HOME</code> to find the right initialization files.</p> <p>I also notice <code>set shell?</code> has changed to something like <code>shell=C:/msys/bin/sh</code> instead of <code>shell=C:\WINDOWS\system32\cmd.exe</code>, but I hope this isn't important for fixing the initialization problem.</p> <p>I need to run gvim with the normal windows environment variables. At least I need to be able to manually override a few important ones like <code>$HOME</code> to something I specify (i.e., I'm not concerned about my windows <code>$HOME</code> changing, so it's fine to use a static value). </p> <p>I tried to reset <code>$HOME</code> manually in my vimrc, but by then it is too late.</p> <p>Is there some trick to specifying <code>$HOME</code> early on during initialization, or as an extra command line parameter?</p> <p>Alternatively, is there some trick with running commands from <code>msys</code> differently? I know almost nothing about how the shell <code>C:/msys/bin/sh</code> works, but I could conceive of some extra arguments that changes the visibile environment for the command (e.g. <code>gvim.exe</code>) you are typing.</p> <p><strong>---Edit---</strong><br> Reposting the solution that worked (it achieves the later idea): </p> <p>Instead of running <code>gvim.exe</code>, run the command <code>HOME="C:\Documents and Settings\username" gvim.exe</code></p>
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    1. CODid you try changing the value of `$HOME` in what `msys` uses as configuration file? Something like `export $HOME="C:\Documents and Settings\username"`.
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    2. COYes, gvim will work from msys if `HOME` is set properly in advance. (The syntax is `export HOME="C:\Documents and Settings\username"` though, without the '$'). But like I said I need a way so that `gvim.exe` will see the right value of `HOME` without changing `HOME` globally for the shell. Is there a way to `export` only for a single command?
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    3. COMy knowledge of the Windows command line is *very* close to `0` but in `*sh` I can do `$ HOME='/path/to/dir' vim filename`. Be careful with that method, though, because `$HOME` is set to a different location than the default one Vim won't see your `_vimrc` or your `vimfiles` unless you place them in that new `$HOME`. Also, using `msys`-provided commands may be harder or even impossible because of that new `$HOME`. I'd say "duplicate your files or use symlinks".
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