Eclipse: filtered resources generation for .project file

Old Forum
1

Gradle (yet?) lacks the functionality of generating the Eclipse filtered resource definitions from the build script. It would be awesome. Unfortunately it is not trivial. Example:

<id>org.eclipse.ui.ide.multiFilter</id>
<arguments>1.0-projectRelativePath-matches-false-false-build</arguments>

The implementation process must start by understanding the id and arguments nodes.

2

You can always modify .project file manually. My solution (excludes all folders): tasks[‘eclipse’].doLast {

def xml = new XmlParser().parse(new File(project.rootDir, ‘.project’))

xml.append(

new XmlParser().parseText("""

<filter>

<id>1421264300269</id>

<name></name>

<type>26</type>

<matcher>

<id>org.eclipse.ui.ide.multiFilter</id>

<arguments>1.0-name-matches-false-false-*</arguments>

</matcher>

</filter>

</filteredResources>""")

)

def pw = new PrintWriter(new FileWriter(new File(project.rootDir, ‘.project’)))

pw.println(’<?xml version="1.0" encoding="UTF-8"?>’)

def p = new XmlNodePrinter(pw)

p.preserveWhitespace = true

p.print(xml) }

3

Possibly better to use the withXml hook:

eclipse.project.file.withXml { XmlProvider -> provider
    def node = new XmlParser().parseText("""
        <filter>
            <id>1421264300269</id>
            <name></name>
            <type>26</type>
            <matcher>
                <id>org.eclipse.ui.ide.multiFilter</id>
                <arguments>1.0-name-matches-false-false-*</arguments>
            </matcher>
        </filter>
    """)
    def filteredResources = provider.asElement().getElementsByTagName("filteredResources")[0]
    filteredResources.appendChild(node)
}
4

How would you choose to generate the id value?

5

AFAIK it does not matter

6

I tried using values that are generated when I perform the exclude by hand, and Eclipse is complaining about it.

7

In fact, since the manually generated values looked very much like a milliseconds epoch time, I tried auto-generating the value using System.getCurrentTime, but I get the same problem:

8

Ah, i know this error. It is due to XML formatting. id line must look exactly like:

<id>1421264300269</id>

no spaces or CRLF.

p.preserveWhitespace = true

this line is IMPORTANT

9

Thanks. That was it. I had copied that line exactly, but I forgot there was another existing “eclipse.doLast” later that was re-writing it again without the preserveWhitespace. I fixed those other unrelated .project XmlNodePrinters and then the spacing was coming out correctly.