--- a/macros.xml	Mon Oct 03 12:18:25 2016 -0400
+++ b/macros.xml	Tue Jan 31 12:43:00 2017 -0500
@@ -14,14 +14,16 @@
       <requirement type="package" version="1.3">bcftools</requirement>
       <!-- conda dependency -->
       <requirement type="package" version="1.3">htslib</requirement>
+      <!-- htslib provides tabix and bgzip
       <requirement type="package" version="0.2.6">tabix</requirement>
+      -->
       <requirement type="package" version="1.2">samtools</requirement>
     </requirements>
   </xml>
   <xml name="version_command">
     <version_command>bcftools 2&gt;&amp;1 | grep 'Version:'</version_command>
   </xml>
-  
+
   <xml name="citations">
     <citations>
       <citation type="doi">10.1093/bioinformatics/btp352</citation>
@@ -45,20 +47,20 @@
 <![CDATA[
 ## May need to symlink input if there is an associated
 #set $input_vcf = 'input.vcf.gz'
-#if $input_file.datatype.file_ext == 'vcf'
+#if $input_file.is_of_type('vcf')
   bgzip -c "$input_file" > $input_vcf &&
   bcftools index $input_vcf &&
-#elif $input_file.datatype.file_ext == 'vcf_bgzip'
+#elif $input_file.is_of_type('vcf_bgzip')
   ln -s "$input_file" $input_vcf
-#elif $input_file.datatype.file_ext == 'bcf'
+#elif $input_file.is_of_type('bcf')
   #set $input_vcf = 'input.bcf'
-  ln -s "$input_file" $input_vcf && 
+  ln -s "$input_file" $input_vcf &&
   #if $input_file.metadata.bcf_index:
     ln -s $input_file.metadata.bcf_index ${input_vcf}.csi &&
-  #else 
+  #else
     bcftools index $input_vcf &&
   #end if
-#elif $input_file.datatype.file_ext == 'bcf_bgzip'
+#elif $input_file.is_of_type('bcf_bgzip')
   ln -s "$input_file" $input_vcf
 #end if
 ]]>
@@ -77,21 +79,21 @@
 #set $vcfs_list_file = 'vcfs_list'
 #for (i,input_file) in enumerate($input_files):
   #set $input_vcf = 'input' + str($i) + '.vcf.gz'
-  #if $input_file.datatype.file_ext == 'vcf'
+  #if $input_file.is_of_type('vcf')
     bgzip -c "$input_file" > $input_vcf &&
     bcftools index $input_vcf &&
-  #elif $input_file.datatype.file_ext == 'vcf_bgz'
+  #elif $input_file.is_of_type('vcf_bgz')
     ln -s "$input_file" $input_vcf
-  #elif $input_file.datatype.file_ext == 'bcf'
+  #elif $input_file.is_of_type('bcf')
     #set $input_vcf = 'input' + str($i) + '.bcf.gz'
     ## bgzip -c "$input_file" > $input_vcf &&
     ln -s "$input_file" $input_vcf &&
     #if $input_file.metadata.bcf_index:
       ln -s $input_file.metadata.bcf_index ${input_vcf}.csi &&
-    #else 
+    #else
       bcftools index $input_vcf &&
     #end if
-  #elif $input_file.datatype.file_ext == 'bcfvcf_bgz'
+  #elif $input_file.is_of_type('bcfvcf_bgz')
     ln -s "$input_file" $input_vcf &&
   #end if
   echo '$input_vcf' >> $vcfs_list_file &&
@@ -225,7 +227,7 @@
   </token>
 
   <xml name="macro_apply_filters">
-    <param name="apply_filters" type="text" value="" label="Apply Filters" optional="true" 
+    <param name="apply_filters" type="text" value="" label="Apply Filters" optional="true"
            help="(-f --apply-filters) Skip sites where FILTER column does not contain any of the strings listed (e.g. &quot;PASS,.&quot;)">
       <validator type="regex" message="FILTER terms separated by commas">^([^ \t\n\r\f\v,]+(,[^ \t\n\r\f\v,]+)*)?$</validator>
     </param>
@@ -272,7 +274,7 @@
         </param>
         <when value="__none__"/>
         <when value="regions">
-            <param name="regions" type="text" value="" label="restrict to comma-separated list of regions" optional="true" 
+            <param name="regions" type="text" value="" label="restrict to comma-separated list of regions" optional="true"
                    help="Each region is specifed as: chr or chr:pos or chr:from-to">
                  <validator type="regex" message="">^(\w+(:\d+(-\d+)?)?(,\w+(:\d+(-\d+)?)?)*)?$</validator>
             </param>
@@ -299,7 +301,7 @@
   <token name="@PREPARE_TARGETS_FILE@">
 <![CDATA[
 #set $targets_path = None
-#if 'targets' in $section 
+#if 'targets' in $section
   #if $section.targets.targets_src == 'targets_file':
     #set $targets_path = 'targets_file.tab.gz'
     bgzip -c "$section.targets.targets_file" > $targets_path &&
@@ -331,7 +333,7 @@
         </param>
         <when value="__none__"/>
         <when value="targets">
-            <param name="targets" type="text" value="" label="Restrict to comma-separated list of targets" optional="true" 
+            <param name="targets" type="text" value="" label="Restrict to comma-separated list of targets" optional="true"
                    help="Each target is specifed as: chr or chr:pos or chr:from-to">
                  <validator type="regex" message="">^(\w+(:\d+(-\d+)?)?(,\w+(:\d+(-\d+)?)?)*)?$</validator>
             </param>
@@ -358,15 +360,15 @@
   </token>
 
   <xml name="macro_samples">
-      <param name="samples" type="text" value="" label="Samples" optional="true" 
+      <param name="samples" type="text" value="" label="Samples" optional="true"
              help="(-s) comma separated list of samples to annotate (or exclude with &quot;^&quot; prefix)">
           <validator type="regex" message="">^(\w+(,\w+)*)?$</validator>
       </param>
-      <param name="invert_samples" type="boolean" truevalue="^" falsevalue="" checked="false" label="Invert Samples" 
+      <param name="invert_samples" type="boolean" truevalue="^" falsevalue="" checked="false" label="Invert Samples"
              help="inverts the query/filtering applied by Samples" />
-      <param name="samples_file" type="data" format="tabular" label="Samples File" optional="True" 
+      <param name="samples_file" type="data" format="tabular" label="Samples File" optional="True"
              help="(-S) file of samples to include" />
-      <param name="invert_samples_file" type="boolean" truevalue="^" falsevalue="" checked="false" label="Invert Samples File" 
+      <param name="invert_samples_file" type="boolean" truevalue="^" falsevalue="" checked="false" label="Invert Samples File"
              help="inverts the query/filtering applied by Samples File" />
   </xml>
   <token name="@SAMPLES@">
@@ -416,7 +418,7 @@
   </token>
 
   <xml name="macro_columns">
-    <param name="columns" type="text" value="" label="Columns" optional="true" 
+    <param name="columns" type="text" value="" label="Columns" optional="true"
             help="list of columns in the annotation file, e.g. CHROM,POS,REF,ALT,-,INFO/TAG. See man page for details">
         <validator type="regex" message="COLUMN names  separated by commas">^([^,]+(,[^,]+)*)?$</validator>
     </param>
@@ -443,7 +445,7 @@
 Output Type
 -----------
 
-Output compressed BCF (b), or uncompressed VCF (v). 
+Output compressed BCF (b), or uncompressed VCF (v).
 Use the BCF option when piping between bcftools subcommands to speed up
 performance by removing unecessary compression/decompression
 and VCF<->BCF conversion.