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From: Markus Armbruster <armbru@redhat.com>
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Date: Tue, 16 Apr 2013 15:52:14 +0200
In-Reply-To: <20130416131611.GA25650@stefanha-thinkpad.redhat.com> (Stefan
	Hajnoczi's message of "Tue, 16 Apr 2013 15:16:11 +0200")
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Subject: Re: [Qemu-devel] [PATCH] qemu-iotests: Fix _filter_qemu
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To: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>, qemu-devel@nongnu.org

Stefan Hajnoczi <stefanha@redhat.com> writes:

[...]
> The problem with the POSIX shell string replacement is that the syntax
> is horrible.  I can never remember what ${%}, ${%%}, ${#} and
> %{##} do.  $(basename $QEMU_PROG) is clear (although it doesn't handle
> spaces in the filename!).

Here's how I cope.  # is left of % my keyboard.  # matches "on the
left", % "on the right".  #/% are "short" and pick the shortest matching
pattern.  ##/%% are "long" and pick the longest matching pattern.