Rename file in Mac OS Terminal using Regex or translate from Windows Script

Question

I would like help with a shell script for macOS to rename files with a certain pattern. The script would handle only one file, not multiple.

Here are three examples:

a. Public Talks_ (189) Walking With God Brings Blessings Now and Forever — Chris Ruscher 10_28_2023.mp3

would become

189 - Walking With God Brings Blessings Now and Forever - Chris Ruscher - 2023-10-28-0900.mp3

b. Public Talks_ (55) How Can You Make a Good Name With God? — Gregory Duhon 11_4_2023.mp3

would become

055 - How Can You Make a Good Name With God? - Gregory Duhon - 2023-11-04-0900.mp3

c. Public Talks_ (9) Walking With God Brings Blessings Now and Forever — Chris Ruscher 10_28_2023.mp3

would become

009 - Walking With God Brings Blessings Now and Forever - Chris Ruscher - 2023-10-28-0900.mp3

So in essence, the final format and order should be: track number, title, speaker name, and timestamp.

1. drop the prefix “Public Talks_ “
2. Isolate the track number as a 3 digit number with leading zeros as needed
3. Dashes in between all 4 elements
4. Reformat date to a timestamp like yyyy-mm-dd-0900

I would then take the shell script and use it per file in this dialog box (no need to iterate):

Please note the variable for the file being passed on to the shell script needs to be written as "$1" as seen in the dialog box below.

Someone helped me create one but it only works for Windows and doesn't take into account "$1" as the file and is set to do multiple files. I need it to work on macOS for one file at a time.

#!/bin/bash for file in *.mp3; do # Remove "Public Talks_" newname=${file#"Public Talks_ "} # Extract the track number and pad with leading zeros track=$(echo $newname | grep -o -E '\([0-9]+\)' | tr -d '()' | awk '{printf "%03d\n", $0}') # Remove track number and trailing spaces newname=$(echo $newname | sed -E 's/\([0-9]+\)//' | sed 's/^ *//') # Extract the title and speaker title=$(echo $newname | awk -F '—' '{print $1}' | sed 's/ *$//') speaker=$(echo $newname | awk -F '—' '{print $2}' | awk '{print $1, $2}') # Extract the date and reformat date=$(echo $newname | grep -o -E '[0-9]+_[0-9]+_[0-9]+' | tr '_' '-' | awk -F- '{print $3"-"$1"-"$2"-0900"}') # Concatenate all elements with dashes newname="$track - $title - $speaker - $date.mp3" # Rename the file mv "$file" "$newname" done 

Can anyone translate it into the proper macOS syntax or write a shell script that is even more concise?

Answer 1

In zsh, from within the directory that contains those files, you'd run:

autoload -Uz zmv zmv -n '*_ \((<0-999>)\)(* )—( * )(<1-12>)_(<1-31>)_(<1900-2100>)(.mp3)' \ '${(l[3][0])1} -$2-$3- $6-${(l[2][0])5}-${(l[2][0])4}-0900$7' 

Example:

$ autoload -Uz zmv $ zmv -n '*_ \((<0-999>)\)(* )—( * )(<1-12>)_(<1-31>)_(<1900-2100>)(.mp3)' \ '${(l[3][0])1} -$2-$3- $6-${(l[2][0])5}-${(l[2][0])4}-0900$7' mv -- 'Public Talks_ (189) Walking With God Brings Blessings Now and Forever — Chris Ruscher 10_28_2023.mp3' '189 - Walking With God Brings Blessings Now and Forever - Chris Ruscher - 2023-28-10-0900.mp3' mv -- 'Public Talks_ (55) How Can You Make a Good Name With God? — Gregory Duhon 11_4_2023.mp3' '055 - How Can You Make a Good Name With God? - Gregory Duhon - 2023-4-11-0900.mp3' mv -- 'Public Talks_ (9) Walking With God Brings Blessings Now and Forever — Chris Ruscher 10_28_2023.mp3' '009 - Walking With God Brings Blessings Now and Forever - Chris Ruscher - 2023-28-10-0900.mp3' 

Remove the -n (dry-run) if happy.

If that has to be a shell script that takes the file names as arguments:

#! /bin/zsh - set -o extendedglob pattern='(#b)*_ \((<0-999>)\)(* )—( * )(<1-12>)_(<1-31>)_(<1900-2100>)(.mp3)' ret=0 for file { if [[ $file = $~pattern ]] { argv=( "$match[@]" ) mv -i -- $file "${(l[3][0])1} -$2-$3- $6-${(l[2][0])5}-${(l[2][0])4}-0900$7" || ret=$? } else { print -ru2 "Skipping $file which doesn't match the pattern" } } exit $ret 

But you'd be missing on the extra safeguards of zmv.

Note that we're looping over all the arguments of the script instead of just processing the first ($1).