Can I exclude a specific file name with Wix Heat using transforms? - wix

Question

Is it possible to exclude a specific file name with Wix using transforms?
I can exclude files that contain a certain string, but this excludes any file name matching the string. For example I can exclude file.exe with the following;
<xsl:key name="fileexe-search" match="wix:Component[contains(wix:File/#Source, 'file.exe')]" use="#Id"/>
but this will also exclude files with file.exe in their name, like file.exe.config.
Thanks.

Answer 1

Looks like you should use ends-with instead of contains. But ends-with does not exist in XSLT 1.0. :)
This answer gives enough details to get the idea of how to implement it. Basically it is a combination of substring and string-length functions.
Besides, you should also consider normalizing the casing before comparison. That is, it is better to lower-case (or upper-case) both strings - the original and the one it ends with. This post can give you an idea of how to do it.
Keeping all this in mind, you will end up with something similar to this:
<!-- The starting backslash is there to filter out files like 'abcfile.exe' -->
<!-- Besides, it's lower-cased to ease comparison -->
<xsl:variable name="FileName">\file.exe</xsl:variable>
<xsl:variable name="ABC">ABCDEFGHIJKLMNOPQRSTUVWXYZ</xsl:variable>
<xsl:variable name="abc">abcdefghijklmnopqrstuvwxyz</xsl:variable>
<xsl:key name="fileexe-search" match="wix:Component[translate(substring(wix:File/#Source, string-length(wix:File/#Source) - string-length($FileName) + 1), $ABC, $abc) = $FileName]" use="#Id"/>

Answer 2

Although the answer provided by #Yan works I prefer to use C# which is simpler to use.
<xsl:stylesheet version="1.0"
...
xmlns:my="urn:my-installer">
...
<msxsl:script language="C#" implements-prefix="my">
<msxsl:using namespace="System.IO" />
<![CDATA[
public bool EndsWith(string str, string end)
{
if (string.IsNullOrEmpty(str))
return false;
if (string.IsNullOrEmpty(end))
return false;
return str.EndsWith(end);
}
]]>
</msxsl:script>
...
Usage example:
<xsl:key name="ignored-components-search" match="wix:Component[my:EndsWith(wix:File/#Source, '.pssym')
or my:EndsWith(wix:File/#Source, '.pdb')
or my:EndsWith(wix:File/#Source, '.cs')
or my:EndsWith(wix:File/#Source,'.xml')
]" use="#Id" />