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Subject: Re: Questions about example of piping process output
From: =?utf-8?Q?Dierk_K=C3=B6nig?= <dierk.koenig@canoo.com>
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Date: Wed, 19 Aug 2015 22:42:16 +0200
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To: users@groovy.incubator.apache.org

Hi,

thanks for reading the book!

I was just about to answer when I recognized that I was about to restate =
the
text that follows the example:

We=E2=80=99re using the pipeTo method of Process, which is invoked by =
using the overridden
or (|) operator. Then we wait for the process to finish with a safe time =
to wait, and
print the result.
The observant reader (yes, that=E2=80=99s all of you!) will have =
recognized that although
the code is a slick solution, there=E2=80=99s also a pure Groovy =
solution that=E2=80=99s platform independent

=20
In other words, this solution _is_ platform dependent and cygwin is a =
bit of a "unusual" platform to run commands at...

keep groovin'
Dierk

> Am 19.08.2015 um 21:56 schrieb KARR, DAVID <dk068x@att.com>:
>=20
> While reading REGINA, I saw the following script:
> --------------
> def listFiles =3D 'ls'.execute()
> def ignoreCase =3D "tr '[A-Z]' '[a-z]'".execute()
> def reverseSort =3D 'sort -r'.execute()
>=20
> listFiles | ignoreCase | reverseSort
>=20
> reverseSort.waitForOrKill(1000)
> if(reverseSort.exitValue()) {
>    print reverseSort.err.text
> } else {
>    print reverseSort.text
> }
> -------------------
>=20
> I find this curious.  It doesn't even seem to me that this could work =
as they intended, although when I run it on Linux, it does apparently =
print reasonable output.  On Win7/Cygwin however, it prints "-rThe =
system cannot find the file specified.".  Any idea what's going on here?
>=20
> Also, the javadoc for "execute()" says that it starts the process and =
returns the process object.  Ignoring for a moment why it completely =
fails on Cygwin, what exactly is the "pipe" line actually doing?