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Date: Tue, 17 Sep 2013 00:45:56 +0400
From: Andrey Repin <anrdaemon@yandex.ru>
Reply-To: Andrey Repin <cygwin@cygwin.com>
Message-ID: <16710079158.20130917004556@mtu-net.ru>
To: David Griffiths <david.griffiths@gmail.com>, cygwin@cygwin.com
Subject: Re: cygpath -m behaviour change
In-Reply-To: <CAF+hkWo0jXKKLM8pS8gZLG0rak+wcLpWJdS2He2_=MxYb0gpYw@mail.gmail.com>
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Greetings, David Griffiths!

>> Yes, that's exactly right, assuming that 'boo' doesn't exist.

> Hi, it happens even if boo does exist. To put it in context, the
> script in question was attempting to determine the current directory:

> CURRENT_DIR=$(cygpath -ma "${0}"/../)

> (I didn't write this script but I assume they did this for performance reasons.)

Glad you didn't... Because otherwise you would be the one to blame for the
problem.
$0 could easily NOT have any path, just a script name.

> But anyway, as you can see ${0} always exists.

Only theoretically.
Practice is that noone will bet a buck on it.

> I looked at the other thread but don't see an immediate connection as
> that was checking for non-existing path members.

If you want to obtain a full name of a running script, you'd need something
like this:

XXX="$(cygpath -au "$0")"
SCRIPT_NAME="$(readlink -fn "${XXX:-$0}")"

This is almost platform-independent, even. To the extent of readlink -f option
support.


--
WBR,
Andrey Repin (anrdaemon@yandex.ru) 17.09.2013, <00:19>

Sorry for my terrible english...


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