msys2 64 bit: help help!

[Luite Stegeman]

Have you tried specifying an absolute path for the git executable that
magit uses, to avoid the overhead of traversing the environment for each
call? (M-x customize-var RET magit-git-executable RET)

On Tue, Jun 28, 2016 at 2:51 PM Simon Peyton Jones via ghc-devs <
ghc-devs at haskell.org> wrote:

> David, Tamar
>
> I have another issue.  I'm using 'magit' (in emacs) to drive git.  But it
> gives half-minute delays to do anything at all.  There are lots of people
> complaining about it (googlable) but no solutions I can see.  Do I have to
> give up magit?
>
> It used to be fine in earlier versions.
>
> Just at the moment it's Much Much More Serious.  Even opening a file in
> emacs (nothing to do with git or (ostensibly) magit, takes nearly a
> minute!!  In the process manager I can see lots of git activity -- just
> when I open a file in ordinary emacs!
>
> I have utterly no idea why this might be.  I'm adding John Wiegley, my
> Emacs Friend
>
> Thanks
>
> Simon
>
> |  -----Original Message-----
> |  From: David Macek [mailto:david.macek.0 at gmail.com]
> |  Sent: 28 June 2016 13:20
> |  To: Simon Peyton Jones <simonpj at microsoft.com>; tamar at zhox.com
> |  Cc: ghc-devs at haskell.org
> |  Subject: Re: msys2 64 bit: help help!
> |
> |  On 27. 6. 2016 23:33, Simon Peyton Jones via ghc-devs wrote:
> |  > 1.  I just left the machine for 10-15 mins and lo! the shell windows
> |  opened up. It just took a loooong time.
> |
> |  I could be something with Active Directory. Cygwin (upon which is
> |  MSYS2 based) integrates with AD, but there are numerous (google-able)
> |  reports of huge slowdowns related to this.
> |
> |  > At this point, starting a new shell no longer took a long time.  It
> |  all seemed to be working.
> |
> |  Also don't forget to exclude `C:\msys64` from any anti-virus scans.
> |
> |
> |  > 2.  I then ran pacman -Syuu as instructed on the installation page:
> |  https://sourceforge.net/p/msys2/wiki/MSYS2%20installation/
> |
> |  I'm afraid you misread the instructions. You should run `update-core`
> |  first to upgrade to the newer pacman that handles `pacman -Syuu`
> |  correctly. (New installer packages with an up-to-date pacman are
> |  planned.)
> |
> |  > The log of what happened is below.  There are numerous failures
> |  involving Cygwin, which I do not have installed, at least not so far
> |  as I know.   I do not know if these failures matter.
> |
> |  They might. See below.
> |
> |  > 3. After this step, starting a shell failed altogether with
> |  "c:/msys64/mingw64_shell.bat is not recognised as an internal or
> |  external command". And sure enough, there is no such file. Presumably
> |  it existed in step 1.  So perhaps step 2 deleted it?
> |
> |  If the post-install script for `filesystem` were able to run, it would
> |  inform you that `*_shell.bat` are deprecated and were removed. I see
> |  you have `msys2-launcher-git` installed -- you can then use
> |  `C:\msys64\mingw64.exe` (and even pin it to the taskbar).
> |
> |  > 4. As you mention, I then tried msys2_shell.cmd.  It worked -- with
> |  a noticeable delay of 5 seconds or so.
> |
> |  May still be AD-related.
> |
> |  > * should I worry about all those install errs
> |
> |  I recommend staying on the safe side and nuke the installation.
> |  Alternatively, reinstall the packages that had failures (`pacman -S
> |  gcc-libs gettext gmp ...`).
> |
> |  > * how can I debug what's happening with
> |  >   that long delay
> |
> |  `/etc/nsswitch.conf` allows for some configuration. See
> |  <https://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-mapping-nsswitch-
> |  pwdgrp>.
> |
> |  > * Should I nuke the start menu shortcuts that
> |  >   the msys64 installer so carefully installed
> |  >   in favour of msys2_shell.cmd?
> |
> |  Yes or see above. Note that you might need `msys2_shell.cmd -mingw64`
> |  instead (not sure if it matters for GHC).
> |
> |  --
> |  David Macek
>
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