wiki.ryliejamesthomas.net

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====== Plaintext ======

===== My Use =====

I mostly use [[mpd]] for playing digital music. This means the playlists are in a plaintext format (m3u), which I find really handy as I can easily modify them. Some examples:

Search playlists for a term, for example a song or artist name.

<code bash>grep -r -n -i [term] .</code>

Replace term in playlists. For example if I move a directory or change a filename. You have to escape more non alphanumeric characters with a ''\'', common ones being ''/'', ''['', '']'', ''('', '')''. You can replace the asterisk with a specific file if you want. I'm using a pound symbol instead of the deaful ''/'' to make this a little less of a hassle.

<code bash>sed -i 's#[find]#[replace]#g' *</code>

I have a convoluted [[bash]] script to convert the paths in playlists formatted to work with [[mpd]] to ones that will works with, say, [[vlc]]. But hey, I learnt how to add arguments and do if/then statements in Bash so I'm very happy it works. (still have to add logging and show diff options)

<code bash>
#!/bin/bash
#	Converts .M3U playlists generated in MPD into
#	ones usable outside MPD—in VLC, for example—by
#	prepending information to the paths.

#	options:
#	-f	Convert single playlist, provide filename with extension.
#		By default it will convert all .M3U files in mpd directory
#	-a	Convert to absolute paths (in /home/[user]/Music/Playlists/path_absolute)
#	-r	Convert to relative paths (in /home/[user]/Music/Playlists)

dir=true
abs=false
rel=false

while getopts :f:ard flag
do
	case $flag in
		f)
			file=${OPTARG}
			dir=false
			;;
		a)
			abs=true
			;;
		r)
			rel=true
			;;
	esac
done

if [ "$dir" = true ]
then
	if [ "$abs" = true ] && [ "$rel" = false ]
	then
		for pl in /home/[user]/Music/Playlists/mpd/*.m3u
			do
				sed -e "s#^#/home/[user]/Music/#" "$pl" > "/home/[user]/Music/Playlists/path_absolute/${pl##*/}"
		done
		echo "Converted directory using absolute paths"
	elif [ "$rel" = true ] && [ "$abs" = false ]
	then
		for pl in /home/[user]/Music/Playlists/mpd/*.m3u
			do
				sed -e "s#^#../#" "$pl" > "/home/[user]/Music/Playlists/${pl##*/}"
		done
		echo "Converted directory using relative paths"
	elif [ "$abs" = true ] && [ "$rel" = true ]
	then
		for pl in /home/[user]/Music/Playlists/mpd/*.m3u
			do
				sed -e "s#^#/home/[user]/Music/#" "$pl" > "/home/[user]/Music/Playlists/path_absolute/${pl##*/}" &&
				sed -e "s#^#../#" "$pl" > "/home/[user]/Music/Playlists/${pl##*/}"
		done
		echo "Converted directory using absolute and relative paths"
	fi
elif [ "$dir" = false ]
then
	if [ "$abs" = true ] && [ "$rel" = false ]
	then
		sed -e "s#^#/home/[user]/Music/#" "/home/[user]/Music/Playlists/mpd/$file.m3u" > "/home/[user]/Playlists/path_absolute/$file.m3u"
		echo "Converted single file using absolute paths"
	elif [ "$rel" = true ] && [ "$abs" = false ]
	then
		sed -e "s#^#../#" "/home/[user]/Music/Playlists/mpd/$file.m3u" > "/home/[user]/Music/Playlists/$file.m3u"
		echo "Converted single file using relative paths"
	elif [ "$abs" = true ] && [ "$rel" = true ]
	then
		sed -e "s#^#/home/[user]/Music/#" "/home/[user]/Music/Playlists/mpd/$file.m3u" > "/home/[user]/Playlists/path_absolute/$file.m3u" &&
		sed -e "s#^#../#" "/home/[user]/Music/Playlists/mpd/$file.m3u" > "/home/[user]/Music/Playlists/$file.m3u"
		echo "Converted single file using absolute and relative paths"
	fi
fi
</code>

===== Metaforms =====

===== Tools =====

==== Grep ====

===== See Also =====

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