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How to search for a string in files with Ant (make sure certain string isn't found in source files)

I am working on a project with a small team (~5 developers) and we would like to ensure that a list of words does not end up in our source code. This code is a extGWT project and we are using an ANT build script to build and deploy our project. We have a text file that has the list of bad words. The build will happen on a linux machine so I have access to find and grep and the like. I can just have the build fail if a bad word is found and we can then do a search of the source code to find where the bad word is located. Any hints on getting this working would be a huge help.

Answer 1

Thanks to all the comments I received I was able to solve my issue and I thought I would put my full solution here for future reference.

<target name="badword-search" description="search for bad words">
        <echo>Doing badword-serach</echo>
        <property name="src.dir" value="src" />
        <property name="search.string" value="\b(word1|word2|word3)\b" />

        <fileset id="existing" dir="${src.dir}">
            <patternset id="files">
                <!-- includes/excludes for your source here -->
            </patternset>
        </fileset>

        <fileset id="matches" dir="${src.dir}">
            <patternset refid="files" />
            <containsregexp expression="${search.string}" casesensitive="false" />
        </fileset>

        <fail message="Found badword in one or more files in '${src.dir}'">
            <condition>
                <resourcecount when="greater" count="0" refid="matches" />
            </condition>
        </fail>
    </target>