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Top Forums Shell Programming and Scripting Merge CSV files and create a column with the filename from the original file Post 302520853 by fransanchezoria on Monday 9th of May 2011 11:16:08 AM
Old 05-09-2011
Question Merge CSV files and create a column with the filename from the original file

Hello everyone!!

I am not completely new to shell script but I havent been able to find the answer to my problem and I'm sure there are some smart brains here up for the challenge Smilie.

I have several CSV files that I need to combine into one, but I also need to know where each row came from. Let me give you an example.

Say I have file1.csv with the content:

Code:
1,a
2,b

And file2.csv:

Code:
3,c
4,d

I would like to have a file named result.csv, with the content:

Code:
1,a,file1.csv
2,b,file1.csv
3,c,file2.csv
4,d,file2.csv

The files I want to merge have different number of rows, but they all have the same number of columns, so I just need to create one new column in the result file. Any ideas??

Thank you beforehand.

/Fran

Last edited by joeyg; 05-09-2011 at 12:54 PM.. Reason: Please use CodeTags around scripts and file examples
 

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ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
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