Check-Installed-Files.build nant script to check if a msi installer contains all required files Based on discussion in WiX mailing list http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/Wix-layout-tp704688.html

Check-Installed-Files.build.xml

<?xml version="1.0" encoding="utf-8" ?> 
<project name="check installer" default="check-installed-files" basedir="." xmlns="http://nant.sf.net/release/0.85-rc3/nant.xsd">
    <description>
    </description>

    <property name="buildarea.dir" value="C:\path\to\buildarea" />
    <property name="msitarget.dir" value="_installer" />
    
    <property name="msi.file" value="ProductName.msi" />

    <target name="extract-msi" description="extract">
        <delete dir="${msitarget.dir}" />
        <exec program="msiexec.exe" verbose="true">
            <arg value="/a" />
            <arg value="${msi.file}" />
            <arg value="TARGETDIR=${path::get-full-path(msitarget.dir)}" />
            <arg line="/qn INSTALL=ALL" />
        </exec>
    </target>

    <target name="check-installed-files" description="check">
        <property name="check.dir" value="${path::combine(msitarget.dir, 'Program Files\ProductName')}" />
        <property name="missingfiles" value="false" />
        
        <fileset id="files.deployed" basedir="${buildarea.dir}">
            <include name="**" />
            <exclude name="**\SomeFileToExclude.dll" />
        </fileset>

        <foreach item="File" property="filename">
            <in>
                <items refid="files.deployed" />
            </in>
            <do>
                <property name="filepath" value="${string::replace(filename, buildarea.dir + '\', '')}" />
                <if test="${not file::exists(path::combine(check.dir, filepath))}" >
                    <echo message="File '${filepath}' is missing in installer" level="Error" />
                    <property name="missingfiles" value="true" />
                </if>
            </do>
        </foreach>
        <if test="${missingfiles}">
            <echo message="Directories used:" />
            <echo message="Source files in '${path::get-full-path(buildarea.dir)}'" />
            <echo message="Msi files in '${path::get-full-path(check.dir)}'" />
            <fail message="One or more files are missing in installer." />
        </if>
    </target>
</project>