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POHow can I split a file up by matching lines context?
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  1. POHow can I split a file up by matching lines context?
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    copied!<p>I have a file, <code>x</code>, with section delimiters:</p> <pre><code>The first section #! The second section #! The third section </code></pre> <p>And I want to split it up into a sequence of separate files, like:</p> <pre><code>The first section</code></pre> <pre><code>#! The second section</code></pre> <pre><code>#! The third section</code></pre> <p>I thought <code>csplit</code> would be the solution, with a command-line something like:</p> <pre><code>$ csplit -sk x '/#!/' {9999}</code></pre> <p>But the second file (<code>xx01</code>) ends up containing both delimiters:</p> <pre><code>#! The second section #! </code></pre> <p>Any ideas for how to accomplish what I want in a POSIX compliant way? (Yes, I could reach for Perl/Python/Ruby and friends; but, the point is to stretch my shell knowledge.)</p> <hr> <p>I worry that I've found a bug in OSX csplit. Can people give the following a go and let me know the results?</p> <pre><code>#!/bin/sh test -e work="$(basename $0).$RANDOM" mkdir $work csplit -sk -f "$work/" - '/#/' '{9999}' &lt;&lt;EOF First # Second # Third EOF if [ $(grep -c '#' $work/01) -eq 2 ]; then echo FAIL Repeat else echo PASS Repeat fi rm $work/* csplit -sk -f "$work/" - '/#/' '/#/' &lt;&lt;EOF First # Second # Third EOF if [ $(grep -c '#' $work/01) -eq 2 ]; then echo FAIL Exact else echo PASS Exact fi uname -a </code></pre> <p>When I run it on my Snow Leopard box, I get:</p> <pre><code>$ ./csplit-test csplit: #: no match FAIL Repeat PASS Exact Darwin lani.bigpond 11.2.0 Darwin Kernel Version 11.2.0: Tue Aug 9 20:54:00 PDT 2011; root:xnu-1699.24.8~1/RELEASE_X86_64 x86_64 </code></pre> <p>And on my Debian box, I get:</p> <pre><code>$ sh ./csplit-test csplit: `/#/': match not found on repetition 2 PASS Repeat PASS Exact </code></pre>
 

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