Re: [PATCH] Introduce git version --list-features for porcelain use

From: Junio C Hamano <junkio@cox.net>
Date: Jun 1, 2007, 03:57 UTC
Message-ID: <7vvee8z5q9.fsf@assigned-by-dhcp.cox.net>
In-Reply-To: <20070601030959.GY7044@spearce.org>

"Shawn O. Pearce" <spearce@spearce.org> writes:

Show 13 quoted lines

> Why cat?  Tcl is so horribly broken that to get data for both stdout
> and stderr through a pipe I have to do something sick like:
>
> 	git fetch 2>&1 | cat
>
> because in Tcl its actually:
>
> 	set rdr [open "| git fetch |& cat" r]
>
> The |& means 2>&1| in normal shell.  But that means I have to have
> a process after it to receive the data.  Normally that's cat.
> But MinGW doesn't have cat.  (Nor do they have dog, but neither
> does Linux...).  So I need a way to redirect output.

Wait a minute. Who interprets |& in the above? Isn't it a shell?

That's why I asked if you are writing for shell-less environment. If you are _not_, can't you do something like this instead?

	set rdr [open "| sh -c 'git fetch 2>&1'" r]

that is, instead of running a command called "git", you invoke a command called "sh" with two parameters, the second parameter being a tad long string that happens to have three letter sequence '2>&1' in it.