Question

I have a CSV file, formatted like this:

0001 @ word @ some information @ other information @

The last column is left empty. I want to tag each line and put the tags in the last column.

I also have a directory, filled with plain text files containing nothing more than lists of words (1 per line). The filename of each list is identical to the tag I want to apply.

Lists/
Lists/fruit1
Lists/fruit2
Lists/vegetables1
Lists/vegetables2

How can I add the name of the every file which contains an exact match for the word in column 2 of the CSV to the end of the CSV? For e.g.:

A line in the CSV is like this, and the word “banana” appears in both of the lists in fruit1 and fruit2.

0004 @ banana @ some information @ other information @

The line above would have those two file names added to the last column of the CSV:

0004 @ banana @ some information @ other information @ fruit1 fruit2

Answer 1

You can do this using a loop to read each line. Extract the second field using cut, and then use grep to find the files containing this field. Then echo out your results.

This is shown below:

while read line
do
    word=$(cut -d@ -f2 <<< "$line")
    results=( $(grep -l $word Lists/*) )
    echo "$line ${results[@]##*/}"
done < input.txt