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Full Discussion: First Script Syntax Error
Top Forums Shell Programming and Scripting First Script Syntax Error Post 302948303 by D351 on Sunday 28th of June 2015 02:13:00 PM
Old 06-28-2015
Quote:
Originally Posted by RudiC
Some comments on your code snippet:
Code:
files=(ls *.mp3)                # this will define & assign an array: (ls a.mp3 b.mp3 c.mp3 ...). You'd need to use it like an array in the for loop, then. 
                                # you might prefer command substitution: files=$(ls *.mp3)
                                # or let the shell do the work for you: files=*.mp3
for song in $files              # this will expand to the first array element: ls. If you want the .mp3 files as well, use array expansion: ${files[@]} if you don't like above proposals
 echo "${song%%*(.mp3)}"        # Why the * and the parentheses? You want to remove nothing but ".mp3", and once only, so one "%" is sufficient
 touch "${song%%*(.mp3)}"       # "${song%.mp3}" will do the job for you. "%*.mp3"  would erase the entire file name, the parentheses can't be matched
                                # and thus stop the expansion.  
                                # You are right in double quoting the file names which will handle spaces in file names, then.
done

I've been cobbling this together from different tutorials found via duckduckgo, so my usage of parenthesis and multiple symbols is sketchy, but based on your advice, I now have:
Code:
#!/bin/bash
#This will create blank lyric files, as used by mocp, for all mp3s in a directory

files=*.mp3
for song in ${files[*]}
do
 echo "${song%.mp3}"
 touch "${song%.mp3}"
done

which appears to be working perfectly. Thank you so much.
 

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MP3::Tag::File(3pm)					User Contributed Perl Documentation				       MP3::Tag::File(3pm)

NAME
MP3::Tag::File - Module for reading / writing files SYNOPSIS
my $mp3 = MP3::Tag->new($filename); ($title, $artist, $no, $album, $year) = $mp3->parse_filename(); see MP3::Tag DESCRIPTION
MP3::Tag::File is designed to be called from the MP3::Tag module. It offers possibilities to read/write data from files via read(), write(), truncate(), seek(), tell(), open(), close(); one can find the filename via the filename() method. parse_filename() ($title, $artist, $no, $album, $year) = $mp3->parse_filename($what, $filename); parse_filename() tries to extract information about artist, title, track number, album and year from the filename. (For backward compatibility it may be also called by deprecated name read_filename().) This is likely to fail for a lot of filenames, especially the album will be often wrongly guessed, as the name of the parent directory is taken as album name. $what and $filename are optional. $what maybe title, track, artist, album or year. If $what is defined parse_filename() will return only this element. If $filename is defined this filename will be used and not the real filename which was set by MP3::Tag with "MP3::Tag->new($filename)". Otherwise the actual filename is used (subject to configuration variable "decode_encoding_filename"). Following formats will be hopefully recognized: - album name/artist name - song name.mp3 - album_name/artist_name-song_name.mp3 - album.name/artist.name_song.name.mp3 - album name/(artist name) song name.mp3 - album name/01. artist name - song name.mp3 - album name/artist name - 01 - song.name.mp3 If artist or title end in "(NUMBER)" with 4-digit NUMBER, it is considered the year. title() $title = $mp3->title($filename); Returns the title, guessed from the filename. See also parse_filename(). (For backward compatibility, can be called by deprecated name song().) $filename is optional and will be used instead of the real filename if defined. artist() $artist = $mp3->artist($filename); Returns the artist name, guessed from the filename. See also parse_filename() $filename is optional and will be used instead of the real filename if defined. track() $track = $mp3->track($filename); Returns the track number, guessed from the filename. See also parse_filename() $filename is optional and will be used instead of the real filename if defined. year() $year = $mp3->year($filename); Returns the year, guessed from the filename. See also parse_filename() $filename is optional and will be used instead of the real filename if defined. album() $album = $mp3->album($filename); Returns the album name, guessed from the filename. See also parse_filename() The album name is guessed from the parent directory, so it is very likely to fail. $filename is optional and will be used instead of the real filename if defined. comment() $comment = $mp3->comment($filename); # Always undef genre() $genre = $mp3->genre($filename); # Always undef perl v5.14.2 2009-11-28 MP3::Tag::File(3pm)
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