#!/bin/bash

if test -z "$1"
then
   echo "ERROR: No command-line argument provided"
   exit 1
fi
WorkOrder=$1

[[ -f updated.xml ]] || {
   cat > updated.xml <<EOF
<?xml version="1.0" encoding="utf-8" ?>
<scbm-extract version="3.3">
   <workOrderList>
   </workOrderList>
</scbm-extract>
EOF
}

cat > updatexsl.$$ <<EOF
<xsl:stylesheet version="1.0"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

   <!-- XSLTPROC pass in as -param name "'value'" etc -->
   <xsl:param name="woc">EMPTY</xsl:param>

   <xsl:output method="xml" indent="yes" encoding="utf-8"/>
   <xsl:strip-space elements="*"/>

   <xsl:template match="/">
      <xsl:apply-templates />
   </xsl:template>

   <xsl:template match="scbm-extract">
     <xsl:copy>
        <xsl:apply-templates select="workOrderList"/>
     </xsl:copy>
   </xsl:template>

   <xsl:template match="workOrderList">
     <xsl:copy>
        <xsl:apply-templates select="workOrder"/>
        <xsl:copy-of select="document('./extract.xml')//workOrder[workOrderCode=\$woc]" />
     </xsl:copy>
   </xsl:template>

   <xsl:template match="workOrder">
       <xsl:copy-of select = "." />
   </xsl:template>

</xsl:stylesheet>
EOF

xsltproc -param woc "'${WorkOrder}'" updatexsl.$$ updated.xml > updated.$$

mv updated.$$ updated.xml

rm -f updated.$$
rm -f updatexsl.$$

exit 0

$ ./update.sh 184851
$ cat updated.xml
<?xml version="1.0" encoding="utf-8"?>
<scbm-extract>
  <workOrderList>
    <workOrder>
      <branchCode>2022:100</branchCode>
      <workOrderCode>184851</workOrderCode>
    </workOrder>
  </workOrderList>
</scbm-extract>
$

$ ./update.sh 184852
$ cat updated.xml
<?xml version="1.0" encoding="utf-8"?>
<scbm-extract>
  <workOrderList>
    <workOrder>
      <branchCode>2022:100</branchCode>
      <workOrderCode>184851</workOrderCode>
    </workOrder>
    <workOrder>
      <branchCode>2023:100</branchCode>
      <workOrderCode>184852</workOrderCode>
    </workOrder>
  </workOrderList>
</scbm-extract>