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galaxy/display_applications/ucsc/bam.xml
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<display id="ucsc_bam" version="1.0.0" name="display at UCSC">
<!-- Load links from file: one line to one link -->
<dynamic_links site_type="ucsc" skip_startswith="#" id="0" name="0">
<!-- Define parameters by column from file, allow splitting on builds -->
<dynamic_param name="site_id" value="0"/>
<dynamic_param name="ucsc_link" value="1"/>
<dynamic_param name="builds" value="2" split="True" separator="," />
<!-- Filter out some of the links based upon matching site_id to a Galaxy application configuration parameter and by dataset dbkey -->
<filter>${site_id in $APP.datatypes_registry.get_display_sites('ucsc')}</filter>
<filter>${dataset.dbkey in $builds}</filter>
<!-- We define url and params as normal, but values defined in dynamic_param are available by specified name -->
<url>${ucsc_link}db=${qp($bam_file.dbkey)}&amp;hgt.customText=${qp($track.url)}</url>
<param type="data" name="bam_file" url="galaxy_${DATASET_HASH}.bam" />
<param type="data" name="bai_file" url="galaxy_${DATASET_HASH}.bam.bai" metadata="bam_index" /><!-- UCSC expects index file to exist as bam_file_name.bai -->
<param type="template" name="track" viewable="True">track type="bam" name="${bam_file.name.replace( '\\', '\\\\' ).replace( '"', '\\"' )}" bigDataUrl="${bam_file.url}" db="${bam_file.dbkey}" pairEndsByName="."</param>
</dynamic_links>
</display>