nl_tokens: get a revision from the history with a specific version number
pl_tokens: function ( systemId , revisionId , target , cb ) { var repoPath = _meta . repoPath ( systemId ) ; git . getFileRevision ( repoPath , revisionId , target + '.json' , function ( err , rev ) { if ( err ) { return cb ( err ) ; } var s ; <mask> { s = JSON . parse ( rev ) ; } catch ( e ) { return cb ( new Error ( 'invalid system definition: ' + e . message ) , null ) ; } cb ( err , s ) ; } ) ; }