GNU bug report logs - #43782
in egrep (grep 3.0), the order of include & exclude is surprisingly significant

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#43782: closed (in egrep (grep 3.0), the order of include &
 exclude is surprisingly significant)
Date: Sat, 03 Oct 2020 19:45:02 +0000

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Your message dated Sat, 3 Oct 2020 12:44:22 -0700
with message-id <e57d2ba1-de76-baba-58de-35b31569e95c <at> cs.ucla.edu>
and subject line Re: bug#43782: in egrep (grep 3.0), the order of include & exclude is surprisingly significant
has caused the debbugs.gnu.org bug report #43782,
regarding in egrep (grep 3.0), the order of include & exclude is surprisingly significant
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


-- 
43782: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=43782
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From: John Ruckstuhl <John.Ruckstuhl <at> intusurg.com>
To: "bug-grep <at> gnu.org" <bug-grep <at> gnu.org>
Subject: in egrep (grep 3.0), the order of include & exclude is surprisingly
 significant
Date: Sat, 3 Oct 2020 19:00:49 +0000

[Message part 3 (text/plain, inline)]

In egrep (grep 3.0), the order of options (multiple --include and --exclude), is surprisingly significant.
I was puzzled by 5 extra output lines in my first egrep,
so I did another egrep, with the --include moved up front.
Known bug?
Yes, I realize that the include by itself would have been sufficient, the exclude in this case is superfluous.
Thx,
John R.

Report bugs to: bug-grep <at> gnu.org
Report Cygwin bugs to: cygwin <at> cygwin.com
GNU grep home page: <http://www.gnu.org/software/grep/>
General help using GNU software: <http://www.gnu.org/gethelp/>

      johnru <at> ISIMFGDEV400 /cygdrive/c/Program Files (x86)/foxtrot/EC Test SW (750390-mango)
      $ egrep -r -i -n -l --exclude="*.bak" --include="*.py" "\.name\b|testname" ISITestFramework | cat -n
           1  ISITestFramework/DUT/CameraModule/CameraModule/CameraModule.py
           2  ISITestFramework/DUT/CameraModule/CameraModule/CameraModule_0.py
           3  ISITestFramework/DUT/EC/EC.py
           4  ISITestFramework/DUT/Endoscope/Endoscope.py
           5  ISITestFramework/DUT/GenericDUT.py
           6  ISITestFramework/DUT/LightEngine/LightEngine/LightEngine.py
      !!   7  ISITestFramework/HTML/BatFileUtils.html
      !!   8  ISITestFramework/HTML/Libs/jquery/1.12.2/jquery.min.js
           9  ISITestFramework/IQOQDQUtils.py
      !!  10  ISITestFramework/Reports/ReportTemplates/Libraries/GoogleChartsJsapi.js
      !!  11  ISITestFramework/Reports/ReportTemplates/Libraries/jquery-latest.min.js
      !!  12  ISITestFramework/Reports/ReportTemplates/TestResultsSimple.html
          13  ISITestFramework/Reports/ReportTools.py
          14  ISITestFramework/Reports/ReportUtils.py
          15  ISITestFramework/Reports/SummaryMetricWriter.py
          16  ISITestFramework/Test.py
          17  ISITestFramework/TestTools.py

      johnru <at> ISIMFGDEV400 /cygdrive/c/Program Files (x86)/foxtrot/EC Test SW (750390-mango)
      $ egrep -r -i -n -l --include="*.py" --exclude="*.bak" "\.name\b|testname" ISITestFramework | cat -n
           1  ISITestFramework/DUT/CameraModule/CameraModule/CameraModule.py
           2  ISITestFramework/DUT/CameraModule/CameraModule/CameraModule_0.py
           3  ISITestFramework/DUT/EC/EC.py
           4  ISITestFramework/DUT/Endoscope/Endoscope.py
           5  ISITestFramework/DUT/GenericDUT.py
           6  ISITestFramework/DUT/LightEngine/LightEngine/LightEngine.py
           7  ISITestFramework/IQOQDQUtils.py
           8  ISITestFramework/Reports/ReportTools.py
           9  ISITestFramework/Reports/ReportUtils.py
          10  ISITestFramework/Reports/SummaryMetricWriter.py
          11  ISITestFramework/Test.py
          12  ISITestFramework/TestTools.py

      johnru <at> ISIMFGDEV400 /cygdrive/c/Program Files (x86)/foxtrot/EC Test SW (750390-mango)
      $ egrep --version
      grep (GNU grep) 3.0
      Packaged by Cygwin (3.0-2)
      Copyright (C) 2017 Free Software Foundation, Inc.
      License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
      This is free software: you are free to change and redistribute it.
      There is NO WARRANTY, to the extent permitted by law.

      Written by Mike Haertel and others, see <http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>.

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: John Ruckstuhl <John.Ruckstuhl <at> intusurg.com>
Cc: 43782-done <at> debbugs.gnu.org
Subject: Re: bug#43782: in egrep (grep 3.0), the order of include & exclude is
 surprisingly significant
Date: Sat, 3 Oct 2020 12:44:22 -0700

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On 10/3/20 12:00 PM, John Ruckstuhl wrote:
> In egrep (grep 3.0), the order of options (multiple --include and --exclude), is surprisingly significant.
> I was puzzled by 5 extra output lines in my first egrep,
> so I did another egrep, with the --include moved up front.

That's expected behavior, but it's not documented and should be. Thanks for 
bringing it up. I installed the attached doc patch.

[0001-doc-document-include-exclude-better.patch (text/x-patch, attachment)]

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