Java 如何通过在 gradle 命令行上传递 version 属性来设置 project.version？
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How to set project.version by passing version property on gradle command line?
提问by pat.inside
I want to build JAR with self-defined version passed via command line, such as:
我想使用通过命令行传递的自定义版本构建 JAR，例如：
When I execute gradle build task like this:
当我像这样执行gradle构建任务时：
gradle build -Pversion=1.0
myproject-1.0.jar should be generated.
应生成 myproject-1.0.jar。
I have tried adding the line below to the build.gradle, but it did not work:
我尝试将下面的行添加到build.gradle，但没有用：
version = project.hasProperty('version') ? project['version'] : '10.0.0'
采纳答案by Stanislav
You are not able to override existing project properties from command line, take a look here. So try to rename a version variable to something differing from version and set it with -Pflag before command, like:
您无法从命令行覆盖现有项目属性，请查看此处。因此，尝试将版本变量重命名为与版本不同的名称，并-P在命令之前使用标志设置它，例如：
gradle -PprojVersion=10.2.10 build
And then in your build.gradle
然后在你的 build.gradle
if (project.hasProperty('projVersion')) {
project.version = project.projVersion
} else {
project.version = '10.0.0'
}
Or as you did with ?: operator
或者像你对 ?: 操作符所做的那样
回答by Opal
If you move versionentry to gradle.propertiesfile you can also:
如果您将version条目移至gradle.properties文件，您还可以：
gradle clean build -Dorg.gradle.project.version=1.1
回答by zeroblaz3
Set the property only in the gradle.propertiesfile (i.e. remove it from build.gradle). Also make sure the options come before the command (as mentioned above).
仅在gradle.properties文件中设置属性（即从 中删除build.gradle）。还要确保选项出现在命令之前（如上所述）。
gradle.properties contents:
gradle.properties 内容：
version=1.0.12
Version can then be overridden on the command line with:
然后可以在命令行上使用以下命令覆盖版本：
gradle -Pversion=1.0.13 publish
回答by Bian Jiaping
If you need a default version other than 'unspecified':
如果您需要“未指定”以外的默认版本：
version = "${version != 'unspecified' ? version : 'your-default-version'}"
Pass version via command line:
通过命令行传递版本：
gradle build -P version=1.0
回答by Ajax
version = (findProperty('version') == 'unspecified') ? '0.1' : version
version = (findProperty('version') == 'unspecified') ? '0.1' : version
回答by Alex
You can pass the project version on cli with -Pversion=...as long as you don't set it in build.gradle. If you need a custom default value for when no version is passed on the cli, use gradle.propertiesfile like so: version=...
-Pversion=...只要您不在build.gradle 中设置它，您就可以在 cli 上传递项目版本。如果在 cli 上没有传递版本时需要自定义默认值，请使用gradle.properties文件，如下所示：version=...
TL;DR: Don't set the version in build.gradlefile if you want to change it later on via cli.
TL;DR：如果您想稍后通过 cli 更改它，请不要在build.gradle文件中设置版本。
