[英]How to overwrite property file value with the one passed with ant -D key?
Here is a property file: 这是一个属性文件:
test.url=https:\\url:port
test.path=/home/folder
test.location=Location
test.version=1
And the following ant task: 以及以下蚂蚁任务:
I can pass temporary value for one run of a task: 我可以为任务的一次运行传递临时值:
ant -Dtest.path=new_path test_props
How can I overwrite test.path value with one I pass using -D key? 我如何使用-D键通过一个覆盖test.path的值? In order, after the same launch, the value of test.path would change to one I pass above?
为了顺序,在相同的启动之后,test.path的值将变为我上面通过的值?
The following variants don't work: 以下变体不起作用:
<entry key="test.path" value="${test.path}"/>
or 要么
<propertycopy name="test.path" from="${test_path}"/>
If you want to permanently change a file, you could use the task . 如果要永久更改文件,可以使用task 。
I'd do the following: 我将执行以下操作:
Create a sample property file, like default.properties.sample. 创建一个示例属性文件,例如default.properties.sample。
Create a target that receives the given -D property, then, if it's been informed, does a replace on file default.properties.sample saving it into a default.properties file. 创建一个接收给定-D属性的目标,然后,如果被告知,则对文件default.properties.sample进行替换,将其保存到default.properties文件中。 The default.properties.sample would have these lines:
default.properties.sample将具有以下行:
test.url=https:\\url:port
test.path=@test_path@
test.location=Location
test.version=1
The action would replace the @test_path@ token with the real value of the property, as informed in the -D parameter, then save the resulting file as default.properties. 该操作将使用-D参数告知的属性的实际值替换@ test_path @标记,然后将结果文件另存为default.properties。 Something like:
就像是:
<copy file="default.properties.sample" toFile="default.properties" />
<replace file="default.properties" token="@test_path@" value="${test.path}" />
Some adjustments need to be made, like: only replace the property if the -D parameter is informed, or else the file would be replaced every time. 需要进行一些调整,例如:仅在通知-D参数时才替换属性,否则每次都将替换文件。
Paths and like should also be adjusted to your needs. 路径等也应根据您的需求进行调整。
I've tested the following scenario and it worked for me: 我已经测试了以下方案,并且对我有用:
I've created two files: a build.xml and a default.properties.sample. 我创建了两个文件:build.xml和default.properties.sample。 Their contents is as follows:
其内容如下:
build.xml build.xml
<?xml version="1.0" encoding="UTF-8"?>
<project name="BuildTest" default="showProperties" basedir=".">
<property file="default.properties"/>
<target name="showProperties">
<echo message="test.property=${test.property}"/>
</target>
<target name="replace">
<fail unless="new.test.property" message="Property new.test.property should be informed via -D parameter"/>
<copy file="default.properties.sample" toFile="default.properties"/>
<replace file="default.properties" token="@test_property@" value="${new.test.property}"/>
</target>
</project>
default.properties.sample: default.properties.sample:
test.property=@test_property@
And they run to the following tests: 他们运行以下测试:
Default run: 默认运行:
C:\Filipe\Projects\BuildTest>ant
Buildfile: C:\Filipe\Projects\BuildTest\build.xml
showProperties:
[echo] test.property=${test.property}
BUILD SUCCESSFUL
Total time: 0 seconds
Error control: 错误控制:
C:\Filipe\Projects\BuildTest>ant replace
Buildfile: C:\Filipe\Projects\BuildTest\build.xml
replace:
BUILD FAILED
C:\Filipe\Projects\BuildTest\build.xml:10: Property new.test.property should be informed via -D parameter
Total time: 0 seconds
Replace of property: 替换财产:
C:\Filipe\Projects\BuildTest>ant replace -Dnew.test.property="This is a New Value"
Buildfile: C:\Filipe\Projects\BuildTest\build.xml
replace:
[copy] Copying 1 file to C:\Filipe\Projects\BuildTest
BUILD SUCCESSFUL
Total time: 0 seconds
Property file after replacement: 替换后的属性文件:
C:\Filipe\Projects\BuildTest>type default.properties
test.property=This is a New Value
And in a subsequent runs the new value of the test.property is present: 在随后的运行中,将显示test.property的新值:
C:\Filipe\Projects\BuildTest>ant
Buildfile: C:\Filipe\Projects\BuildTest\build.xml
showProperties:
[echo] test.property=This is a New Value
BUILD SUCCESSFUL
Total time: 0 seconds
I think that is what you're looking for. 我认为这就是您要寻找的。
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