Ant 任务比较两个属性文件

Question

有谁知道比较两个（Java）属性文件的 Ant 任务？我找不到任何东西，但我想在开始实施之前确定一下。

• 输入：两个属性文件
• 输出：在一个文件中但不在另一个文件中的属性键列表。

明确一点：它应该执行属性文件语法感知比较，比较键的存在，但忽略值。

Answer 1

最好的选择是使用PropDiff 实用程序。它具有比较、组合和交叉 Java 属性文件的选项。它是开源的，因此您可以根据自己的要求对其进行修改。

这是 PropDiff 的 documentation。

Answer 2

您可以尝试将groovy ant task 与java-diff-utils 库结合起来

示例

├── build.xml
├── file1.properties
└── file2.properties

运行构建会产生以下输出：

diff:
   [groovy] [DeleteDelta, position: 1, lines: [two=2]]
   [groovy] [InsertDelta, position: 3, lines: [threeandhalf=3.5]]
   [groovy] [ChangeDelta, position: 4, lines: [five=5] to [five=55555]]

build.xml

<project name="demo" default="diff" xmlns:ivy="antlib:org.apache.ivy.ant">

    <target name="resolve">
        <ivy:cachepath pathid="build.path">
            <dependency org="org.codehaus.groovy" name="groovy-all" rev="2.1.0-rc-1" conf="default"/>
            <dependency org="com.googlecode.java-diff-utils" name="diffutils" rev="1.2.1" conf="default"/>
        </ivy:cachepath>
    </target>

    <target name="diff" depends="resolve">
        <taskdef name="groovy" classname="org.codehaus.groovy.ant.Groovy" classpathref="build.path"/>

        <groovy>
            import difflib.*

            def original = new File("file1.properties").readLines()
            def revised  = new File("file2.properties").readLines()

            Patch patch = DiffUtils.diff(original, revised)

            patch.getDeltas().each {
                println it
            }
        </groovy>
    </target>

</project>

注意事项：

• 使用Apache ivy 下载依赖项

file1.properties

one=1
two=2
three=3
four=4
five=5

file2.properties

one=1
three=3
threeandhalf=3.5
four=4
five=55555

修改示例

返回第二个文件中缺少的第一个文件中的属性：

diff:
   [groovy] Missing keys: [two]

build.xml

<project name="demo" default="diff" xmlns:ivy="antlib:org.apache.ivy.ant">

    <target name="resolve">
        <ivy:cachepath pathid="build.path">
            <dependency org="org.codehaus.groovy" name="groovy-all" rev="2.1.0-rc-1" conf="default"/>
        </ivy:cachepath>
    </target>

    <target name="diff" depends="resolve">
        <taskdef name="groovy" classname="org.codehaus.groovy.ant.Groovy" classpathref="build.path"/>

        <groovy>
            def source = new Properties()
            def target = new Properties()

            new File("file1.properties").withInputStream { source.load(it) }
            new File("file2.properties").withInputStream { target.load(it) }

            def diff = source.findResults { k,v ->
                k in target ? null : k
            }

            println "Missing keys: ${diff}"
        </groovy>
    </target>

</project>

Answer 3

这是另一种只需要 ant-contrib 库的方法：

<target name="checkPropertyFiles">
    <antcall target="ensureTwoFilesHaveSameProperties">
        <param name="file1" value="file1.properties"/>
        <param name="file2" value="file2.properties"/>
    </antcall>
</target>

<target name="ensureTwoFilesHaveSameProperties">
    <loadproperties srcFile="${file1}" prefix="prefixfile1"/>
    <loadproperties srcFile="${file2}" prefix="prefixfile2"/>

    <propertyselector property="file1.list" delimiter="," match="prefixfile1\.(.+)" select="\1"/>
    <propertyselector property="file2.list" delimiter="," match="prefixfile2\.(.+)" select="\1"/>

    <for list="${file1.list}" param="file1.property">
        <sequential>
            <if>
                <not>
                    <matches pattern=",@{file1.property}," string=",${file2.list}," />
                </not>
                <then>
                    <property name="error.encountered" value="true"/>
                    <echo message="Property @{file1.property} is present in ${file1} but not in ${file2}"/>
                </then>
            </if>
        </sequential>
    </for>
    <for list="${file2.list}" param="file2.property">
        <sequential>
            <if>
                <not>
                    <matches pattern=",@{file2.property}," string=",${file1.list}," />
                </not>
                <then>
                    <property name="error.encountered" value="true"/>
                    <echo message="Property @{file2.property} is present in ${file2} but not in ${file1}"/>
                </then>
            </if>
        </sequential>
    </for>

    <fail message="Property files do not have the same set of keys.">
        <condition>
            <isset property="error.encountered"/>
        </condition>
    </fail>

    <echo message="OK: ${file1} has same properties as ${file2}"/>
</target>