CODEWITHSUNDEEP
bashmacosfile
Danny L
Danny L

Reputation: 21

Bash script: How do I get a script to check for duplicate file names of different formats?

So I have a conversion program (works through command line) that takes a data file and converts it into a new format while also putting it in a folder with various subfolders. I wanted to create a script that would check for duplicates before executing this conversion program.

So far, I have

#!/bin/bash
for subj in `ls <directory to data files>`
do
        subj_name=$subj
        subj_path=<directory to data files>/$subj_name #I need this for my program, can ignore


        cd <directory with output folders>

        if [ -e “$subj” ]; then
             echo “This file already exists” #This will restart the loop and move to the next file
        else
             echo “This folder does not exist”
             My_Program #I can handle this one
        fi
done

The program works fine with files of the same format (ie .txt and .txt) but cannot check for a folder and .txt for the same name. Are there any changes I can make to check for the same name regardless of file format?

Edit: I did a little experimenting, and I put a duplicate data file into the directory with the output folders and it still didn't recognize it. I think the cd line or the if line is wrong then.. anyone have any tips on how I could fix this?

Upvotes: 0

Views: 204

Answers (1)

Bruno Negr&#227;o Zica
Bruno Negr&#227;o Zica

Reputation: 814

Use the syntax bellow to remove ".txt" from the end of value of $subj, returning the resulting string . (more info on "Bash String Manipulation")

${subj%.txt}

Then check the existence of files/directories with or without .txt:

if [ -e "$subj" ] || [ -e "${subj%.txt}" ]; then
....

If you want to remove any suffix (.txt, .tgz, ...) use ${subj%.*} to delete all characters after (and including) the last '.' Example:

[bash]$ subj=file.txt
[bash]$ echo ${subj%.*}
[bash]$ file

Or use ${subj%%.*} to delete all characters after (and including) the first '.':

[bash]$ subj=file.txt.tgz
[bash]$ echo ${subj%%.*}
[bash]$ file

Upvotes: 3

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