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Top Forums Shell Programming and Scripting Read text between regexps and write into files based on a field in the text Post 302864625 by r3d3 on Wednesday 16th of October 2013 10:59:42 PM
Old 10-16-2013
Read text between regexps and write into files based on a field in the text

Hi,

I have a huge file that has data something like shown below:

huge_file.txt
Code:
start regexp
Name=Name1
Title=Analyst
Address=Address1
Department=Finance
end regexp
some text 
some text
start regexp
Name=Name2
Title=Controller
Address=Address2
Department=Finance
end regexp
some text 
some text
start regexp
Name=Name3
Title=Associate
Address=Address3
Department=Marketing
end regexp
some text
some text

I can extract the records between the start and end regular expressions using either Awk or Sed. It will really help me if I can read these records and write them into multiple files named after the Department, so they can be reviewed rather quickly.

Output I am expecting is -

Finance.txt
Code:
start regexp
Name=Name1
Title=Analyst
Address=Address1
Department=Finance
end regexp

start regexp
Name=Name2
Title=Controller
Address=Address2
Department=Finance
end regexp

Marketing.txt
Code:
start regexp
Name=Name3
Title=Associate
Address=Address3
Department=Marketing
end regexp

I thought using single command line as follows would work, but clearly I am missing something.
Code:
cat huge_file.txt | sed -n '/start regexp/,/end regexp/p' | tee record_buffer | grep Department | awk -F\= '{print $2}' | xargs cat record_buffer > {}

I think the problem was that output from sed is not single record but rather all the records between regexps. Any suggestions?
 

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textutil::split(n)				    Text and string utilities, macro processing 				textutil::split(n)

__________________________________________________________________________________________________________________________________________________

NAME
textutil::split - Procedures to split texts SYNOPSIS
package require Tcl 8.2 package require textutil::split ?0.7? ::textutil::split::splitn string ?len? ::textutil::split::splitx string ?regexp? _________________________________________________________________ DESCRIPTION
The package textutil::split provides commands that split strings by size and arbitrary regular expressions. The complete set of procedures is described below. ::textutil::split::splitn string ?len? This command splits the given string into chunks of len characters and returns a list containing these chunks. The argument len defaults to 1 if none is specified. A negative length is not allowed and will cause the command to throw an error. Providing an empty string as input is allowed, the command will then return an empty list. If the length of the string is not an entire multiple of the chunk length, then the last chunk in the generated list will be shorter than len. ::textutil::split::splitx string ?regexp? This command splits the string and return a list. The string is split according to the regular expression regexp instead of a simple list of chars. Note that if you parentheses are added into the regexp, the parentheses part of separator will be added into the result list as additional element. If the string is empty the result is the empty list, like for split. If regexp is empty the string is split at every character, like split does. The regular expression regexp defaults to "[\t \r\n]+". BUGS, IDEAS, FEEDBACK This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category textutil of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for either package and/or documentation. SEE ALSO
regexp(n), split(n), string(n) KEYWORDS
regular expression, split, string CATEGORY
Text processing textutil 0.7 textutil::split(n)
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