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Subject: Re: grep 3.0-2 not stripping CRs on Windows
To: cygwin AT cygwin DOT com
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From: cyg Simple <cygsimple AT gmail DOT com>
Message-ID: <ff0dc09c-afcb-aba9-cf11-c74a9c3e77cb@gmail.com>
Date: Mon, 17 Dec 2018 10:38:49 -0500
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On 12/17/2018 8:05 AM, Steven Penny wrote:
> On Mon, 17 Dec 2018 13:22:48, Ondřej Surý wrote:
>> # No amount of options makes the grep find the text in the file
>> $ ./grep-3.0-2.exe 'foo$’ crlf.txt
>> $ ./grep-3.0-2.exe -U 'foo$' crlf.txt
>> $ ./grep-3.0-2.exe -a 'foo$’ crlf.txt
> 
> Your commands are failing because you are not accounding for the carriage
> returns. as was said, this change was intentionally done for the purpose of
> making scripts MORE portable:
> 

And the portability is what we want to keep.

> https://cygwin.com/ml/cygwin/2017-02/msg00155.html
> 
> if you want to keep your grep command, you need to remove CR first:
> 
>     $ printf 'alpha\r\nbeta\r\n' > CRLF.txt
>     $ tr -d '\r' < CRLF.txt | grep 'a$'

This is the POSIX method to get portability and Cygwin is POSIX for 
Windows.  Therefore the bits of documentation for MS-DOS  and MS-Windows 
isn't in affect for Cygwin grep.  In other words the following is in 
affect but can be misinterpreted because Cygwin runs on MS-Windows but 
isn't considered such.

"This option  has  no  effect  on  platforms other than MS-DOS and 
MS-Windows."

>     alpha
>     beta

-- 
cyg Simple

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