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Re: tramp (2.1.15); M-! runs in a tty

From: Michael Albinus
Subject: Re: tramp (2.1.15); M-! runs in a tty
Date: Sun, 24 Jan 2010 16:56:13 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.91 (gnu/linux)

address@hidden (Trent W. Buck) writes:

> The command run by M-! (shell-command) runs in a tty if and only if the
> default-directory is over TRAMP.  The following test will print a zero
> in the echo area if fd 1 (stdout) is a tty:
>     M-! test -t 1; echo $?

Tramp needs a tty. It must communicate with the remote shell, for
example in order to determine the prompt, when a command is finished.

> This is a show-stopper issue when running git over tramp, because
>   1. git notes that stdout is a tty;
>   2. git invokes the pager;
>   3. the pager waits forever for input from /dev/tty; and
>   4. Emacs waits forever for the shell command to terminate.
> There are some obvious workarounds:
>  - customize the remote user's dotfiles; or
>  - when using git over tramp, ALWAYS pipe through cat

There are alternatives. Set the $GIT_PAGER environment variable in
`tramp-remote-process-environment', or call git with --no-pager. Both
can be done centrally.

Best regards, Michael.

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