MusicBrainz Picard/Documentation/Scripting: Difference between revisions
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(from looking at the source code, this seems to be how the function works (Imported from MoinMoin)) |
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#REDIRECT [[MusicBrainz Picard]] |
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This page describes a simple scripting language implemented in [[Picard Qt|PicardQt]]. |
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==Syntax== |
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The syntax is derived from [http://wiki.hydrogenaudio.org/index.php?title=Foobar2000:Titleformat_Reference Foobar2000's titleformat]. There are three base elements: '''text''', '''variable''' and '''function'''. Variables consist of alpha-numeric characters enclosed in percent signs (e.g. <code><nowiki>%artist%</nowiki></code>). Functions start with a dollar sign and end with an argument list enclosed in parentheses (e.g. <code><nowiki>$lower(...)</nowiki></code>). |
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To use parenthesis or commas as-is inside a function call you must escape them with a backslash. |
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==Metadata Variables== |
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See [[Picard Tags|PicardTags]] for list of variables available in [[Tagger Script|TaggerScript]]. |
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==Technical Variables== |
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===%_extension%=== |
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<ul><li style="list-style-type:none">Extension of the file name. For example ''mp3'' for file ''01 Track.mp3''. |
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</ul> |
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==Functions== |
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===$if(if,then,else)=== |
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<ul><li style="list-style-type:none">If <code><nowiki>if</nowiki></code> is not empty, it returns <code><nowiki>then</nowiki></code>, otherwise it returns <code><nowiki>else</nowiki></code>. |
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</ul> |
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===$if2(a1,a2,a3,...)=== |
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<ul><li style="list-style-type:none">Returns first non empty argument. |
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</ul> |
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===$lower(text)=== |
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<ul><li style="list-style-type:none">Returns <code><nowiki>text</nowiki></code> in lower case. |
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</ul> |
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===$upper(text)=== |
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<ul><li style="list-style-type:none">Returns <code><nowiki>text</nowiki></code> in upper case. |
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</ul> |
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===$left(text,num)=== |
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<ul><li style="list-style-type:none">Returns first <code><nowiki>num</nowiki></code> characters from <code><nowiki>text</nowiki></code>. |
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</ul> |
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===$right(text,num)=== |
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<ul><li style="list-style-type:none">Returns last <code><nowiki>num</nowiki></code> characters from <code><nowiki>text</nowiki></code>. |
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</ul> |
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===$num(num,len)=== |
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<ul><li style="list-style-type:none">Returns <code><nowiki>num</nowiki></code> formatted to <code><nowiki>len</nowiki></code> digits. |
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</ul> |
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===$replace(text,search,replace)=== |
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<ul><li style="list-style-type:none">Returns <code><nowiki>replace</nowiki></code> in place of <code><nowiki>text</nowiki></code>, if <code><nowiki>search</nowiki></code> was found in <code><nowiki>text</nowiki></code>. |
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</ul> |
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===$rsearch(text,pattern)=== |
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<ul><li style="list-style-type:none">[http://docs.python.org/lib/re-syntax.html Regular expression] search. This function will return the first matching group. |
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</ul> |
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===$rreplace(text,pattern,replace)=== |
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<ul><li style="list-style-type:none">[http://docs.python.org/lib/re-syntax.html Regular expression] replace. |
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</ul> |
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===$in(x,y)=== |
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<ul><li style="list-style-type:none">Returns true, if <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code> contains <code><nowiki></nowiki></code>y<code><nowiki></nowiki></code>. |
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</ul> |
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===$unset(name)=== |
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<ul><li style="list-style-type:none">Unsets the variable <code><nowiki></nowiki></code>name<code><nowiki></nowiki></code>. |
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</ul> |
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===$set(name, value)=== |
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<ul><li style="list-style-type:none">Sets the variable <code><nowiki></nowiki></code>name<code><nowiki></nowiki></code> to <code><nowiki></nowiki></code>value<code><nowiki></nowiki></code>. |
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</ul> |
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===$get(name)=== |
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<ul><li style="list-style-type:none">Returns the variable <code><nowiki></nowiki></code>name<code><nowiki></nowiki></code> (equivalent to <code><nowiki></nowiki></code>%name%<code><nowiki></nowiki></code>). |
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</ul> |
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===$copy(new,old)=== |
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<ul><li style="list-style-type:none">Copies metadata from variable <code><nowiki></nowiki></code>old<code><nowiki></nowiki></code> to <code><nowiki></nowiki></code>new<code><nowiki></nowiki></code>. The difference between <code><nowiki></nowiki></code>$set(new,%old%)<code><nowiki></nowiki></code> is that <code><nowiki></nowiki></code>$copy(new,old)<code><nowiki></nowiki></code> copies multi-value variables without flattening them. |
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</ul> |
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===$trim(text[,char])=== |
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<ul><li style="list-style-type:none">Trims all leading and trailing whitespaces from <code><nowiki></nowiki></code>text<code><nowiki></nowiki></code>. The optional second parameter specifies the character to trim. |
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</ul> |
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===$add(x,y)=== |
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<ul><li style="list-style-type:none">Add <code><nowiki></nowiki></code>y<code><nowiki></nowiki></code> to <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code>. |
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</ul> |
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===$sub(x,y)=== |
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<ul><li style="list-style-type:none">Substracts <code><nowiki></nowiki></code>y<code><nowiki></nowiki></code> from <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code>. |
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</ul> |
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===$div(x,y)=== |
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<ul><li style="list-style-type:none">Divides <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code> by <code><nowiki></nowiki></code>y<code><nowiki></nowiki></code>. |
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</ul> |
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===$mod(x,y)=== |
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<ul><li style="list-style-type:none">Returns the remainder of <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code> divided by <code><nowiki></nowiki></code>y<code><nowiki></nowiki></code>. |
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</ul> |
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===$mul(x,y)=== |
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<ul><li style="list-style-type:none">Multiplies <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code> by <code><nowiki></nowiki></code>y<code><nowiki></nowiki></code>. |
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</ul> |
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===$or(x,y)=== |
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<ul><li style="list-style-type:none">Returns true, if either <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code> or <code><nowiki></nowiki></code>y<code><nowiki></nowiki></code> not empty. |
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</ul> |
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===$and(x,y)=== |
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<ul><li style="list-style-type:none">Returns true, if both <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code> and <code><nowiki></nowiki></code>y<code><nowiki></nowiki></code> are not empty. |
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</ul> |
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===$not(x)=== |
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<ul><li style="list-style-type:none">Returns true, if <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code> is empty. |
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</ul> |
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===$eq(x,y)=== |
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<ul><li style="list-style-type:none">Returns true, if <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code> equals <code><nowiki></nowiki></code>y<code><nowiki></nowiki></code>. |
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</ul> |
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===$ne(x,y)=== |
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<ul><li style="list-style-type:none">Returns true, if <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code> not equals <code><nowiki></nowiki></code>y<code><nowiki></nowiki></code>. |
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</ul> |
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===$lt(x,y)=== |
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<ul><li style="list-style-type:none">Returns true, if <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code> is lower than <code><nowiki></nowiki></code>y<code><nowiki></nowiki></code>. |
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</ul> |
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===$lte(x,y)=== |
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<ul><li style="list-style-type:none">Returns true, if <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code> is lower than or equals <code><nowiki></nowiki></code>y<code><nowiki></nowiki></code>. |
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</ul> |
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===$gt(x,y)=== |
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<ul><li style="list-style-type:none">Returns true, if <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code> is greater than <code><nowiki></nowiki></code>y<code><nowiki></nowiki></code>. |
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</ul> |
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===$gte(x,y)=== |
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<ul><li style="list-style-type:none">Returns true, if <code><nowiki></nowiki></code>x<code><nowiki></nowiki></code> is greater than or equals <code><nowiki></nowiki></code>y<code><nowiki></nowiki></code>. |
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</ul> |
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===$noop(...)=== |
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<ul><li style="list-style-type:none">Does nothing (useful for comments or disabling a block of code). |
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</ul> |
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===$len(text)=== |
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<ul><li style="list-style-type:none">Returns the number of characters in text. |
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</ul> |
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===$performer(pattern="", join=", ")=== |
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<ul><li style="list-style-type:none">Returns the performers where the performance type (e.g. "vocal") matches <code><nowiki></nowiki></code>pattern<code><nowiki></nowiki></code>, joined by <code><nowiki></nowiki></code>join<code><nowiki></nowiki></code>. |
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</ul> |
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==Examples== |
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===Use case 1: Disc numbers=== |
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<pre>$set(discnumber,$rsearch(%album%,\\\(disc \(\\d+\)\\\))) |
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$set(album,$rreplace(%album%,\\s\\\(disc \\d+\\\),)) |
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</pre> |
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<ul><li style="list-style-type:none">Would it be possible to trim all of ''(disc 1: Subtitle Here)'' and also set the disc number? --[[User:AaronCooper|AaronCooper]] (2007-03-07) |
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<ul><li style="list-style-type:none">You can use the plugin from [[Picard Qt/Plugins|PicardQt/Plugins]]. --[[User:LukasLalinsky|LukasLalinsky]] |
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<ul><li style="list-style-type:none">%totaldiscs% Doesn't really work, is there some way to fix that? --Madness |
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</ul> |
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</ul> |
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</ul> |
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===Use case 2: Artist names=== |
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<pre>$if($search(%album%,(feat. conductor)), |
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$set(artist,%orchestra%)) |
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</pre> |
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<ul><li style="list-style-type:none">''Stupid assumption that all classical albums have "feat. conductor" in the title, but it shows the idea. :)'' |
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</ul> |
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===Use case 3: Live tracks on live albums=== |
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<pre>$if($and($eq(%releasetype%,live),$not($in(%title%,\(live\)))),$set(title,%title% \(live\))) |
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</pre> |
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===Lower case filenames with underscores=== |
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<pre>$lower($replace(%albumartist%/%album%/$num(%tracknumber%,2) %title%, ,_)) |
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</pre> |
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===(Year) only if available=== |
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<pre>$if(%date%,\($left(%date%,4)\)) |
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</pre> |
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===Remove "feat." from track titles=== |
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<pre>$set(title,$rreplace(%title%,\\s\\\(feat. [^\)]+\\\),)) |
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</pre> |
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===Convert triple-dot to ellipsis=== |
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<pre>$set(title,$replace(%title%,...,…)) |
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$set(album,$replace(%album%,...,…)) |
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</pre> |
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This one is useful for people concerned about correct typography and also fixes one problem on Linux: if an album (assuming it's also a directory) is called something like "...for you!", it is considered hidden and therefore might be not accessible from some applications. |
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===Use a different naming pattern for NATs=== |
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<pre>$if($eq([non-album tracks],%album%),[non-album tracks]/%tracknumber%. %artist% - ,%artist% - $if(%date%, $left(%date%,4) )- %album%/%tracknumber%.)%title% |
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</pre> |
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Result: |
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* Non-Album Tracks: [non-album tracks]/Band Name - Track Name.ext |
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* Tracks in releases: Band Name - year - Release Name/##. Track Name.ext |
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[[Category:To Be Reviewed]] [[Category:Picard]] [[Category:Development]] |
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Latest revision as of 21:16, 25 November 2014
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