Date: Sun, 17 May 2009 23:57:31 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Kelly Jones <kelly.terry.jones@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Better version of diff? Message-ID: <20090518045730.GE52703@dan.emsphone.com> In-Reply-To: <26face530905171429x7cb58cbcv488b6d9397310a2e@mail.gmail.com> References: <26face530905171429x7cb58cbcv488b6d9397310a2e@mail.gmail.com>
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In the last episode (May 17), Kelly Jones said: > I often need to compare two Perl files sans comments. This mostly works: > > egrep -v '^#' file1.pl > file1.tmp > egrep -v '^#' file2.pl > file2.tmp > diff -B file1.tmp file2.tmp Take a look at the -I option to diff. It lets you ignore lines matching a specified regex. > (yes, it breaks for perldoc style comments, comments on lines w/ code, > # characters inside HERE docs, and probably other cases-- just an > approximation) > > I also often need to see if two files contain the same lines, minus > comments and allow duplicates. This mostly works: > > egrep -v '^#' file1.txt | sort | uniq > file1.tmp > egrep -v '^#' file2.txt | sort | uniq > file2.tmp > diff -B file1.tmp file2.tmp;: comm would also work here No suggestions here. Sorting a file is not something diff should do imho. -- Dan Nelson dnelson@allantgroup.com
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