Is there a way to add a suffix to files where the suffix comes from a list in a text file?-CodePudding

So currently the searches are coming up with a single word renaming solution, where you define the (static) suffix within the code. I need to rename based on a text based filelist and so -

I have a list of files in /home/linux/test/ :

1000.ext
1001.ext
1002.ext
1003.ext
1004.ext

Then I have a txt file (labels.txt) containing the labels I want to use:

Alpha
Beta
Charlie
Delta
Echo

I want to rename the files to look like (example1):

1000 - Alpha.ext
1001 - Beta.ext
1002 - Charlie.ext
1003 - Delta.ext
1004 - Echo.ext

How would you a script which renames all the files in /home/linux/test/ to the list in example1?

CodePudding user response：

Use paste to loop through the two lists in parallel. Split the filenames into the prefix and extension, then combine everything to make the new filenames.

dir=/home/linux/test
for file in "$dir"/*.ext
do
    read -r label
    prefix=${file%.*} # remove everything from last .
    ext=${file##*.}   # remove everything before last .
    mv "$file" "$prefix - $label.$ext"
done < labels.txt

CodePudding user response：

I originally partly got the request wrong, although this step is still useful, because it gives you the filenames you need.

#!/bin/sh

count=1000
cp labels.txt stack

cat > ed1 <<EOF
1p
q
EOF

cat > ed2 <<EOF
1d
wq
EOF

next () {
[ -s stack ] && main
}

main () {
line="$(ed -s stack < ed1)"
echo "${count} - ${line}.ext" >> newfile
ed -s stack < ed2
count=$(($count 1))
next
}

next

Now we just need to move the files:-

cp newfile stack
for i in *.ext
do
newname="$(ed -s stack < ed1)"
mv -v "${i}" "${newname}"
ed -s stack < ed2
done

rm -v ./ed1
rm -v ./ed2
rm -v ./stack
rm -v ./newfile