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我有一个 gradle 插件来实现自定义版本控制方案，几乎与 gradle 文档第 49.8.2.2 节中的建议相同。使用 gradle 的公司项目应用插件，然后按照建议声明依赖项： compile 'group:name:{default}' 其中 {default} 是一个字符串，表示实际版本应由插件提供。该插件在配置时将 {default} 替换为由插件中的逻辑确定的正确版本。这一切都很好。

问题是，当我运行使用 mavenDeployer 的 uploadArchives 任务时，生成的 pom 文件中生成的依赖项会获得 {default} 的版本，即指示符字符串而不是实际的依赖项版本。当我们的 Maven 项目尝试将这个 pom 作为依赖项引入时，他们无法解决它的依赖项。

环顾网络并自己弄乱它，似乎在运行 uploadArchives 任务时，gradle首先转储了所有其他构建的配置。因此，即使项目配置是在配置阶段由具有正确依赖版本的插件构建的，在生成 pom 文件时，uploadArchives 任务也不会使用具有这些版本的配置。

如何让 uploadArchives 任务使用自定义版本插件在配置时解析的依赖版本生成 pom 文件？

这是我的 build.gradle 文件： 

buildscript {
    repositories {
        maven {url "somewhere/overtherainbow/releases/"}
    }
    dependencies {
        classpath 'com.overtherainbow:custom-dependency-resolution-plugin:1.0-SNAPSHOT'
    }
}

subprojects {

    apply plugin: 'custom-dependency-resolution'
    apply plugin: 'java'
    apply plugin: 'maven'

    group = "com.overtherainbow"
    version ="1.0-SNAPSHOT"

    repositories {
        maven {url "somewhere/overtherainbow/releases/"}
        mavenCentral()
    }

    dependencies {
        compile 'javax.servlet:servlet-api:default'
        compile 'log4j:log4j:default'
    }

    uploadArchives {
        repositories {
            mavenDeployer {
                uniqueVersion = false
                repository(url: "somewhere/overtherainbow/releases) 
                snapshotRepository(url: "somewhere/overtherainbow/snapshots")
            }
        }
    }
}

project(':bar') {
    dependencies {
        compile project(':common')
        compile project(':foo')
    }
}

project(':foo') {
    dependencies {
        compile project(':common')
    }
}

这是插件代码：

package com.overtherainbow

import org.gradle.api.Project
import org.gradle.api.Plugin
import org.gradle.api.artifacts.DependencyResolveDetails

class DefaultVersionPlugin implements Plugin<Project> {
    // This is where dependency versions are defined
    def defaultVersionsMap = [
        'javax.servlet:servlet-api' : '2.5',
        'log4j:log4j' : '1.2.16']

    void apply(Project project) {
        project.configurations.all {
            resolutionStrategy.eachDependency {
                DependencyResolveDetails details -> resolveDependencyVersion(project, details)
            }
        }
    }

    def resolveDependencyVersion(Project project, DependencyResolveDetails details) {
        if (details.requested.version == 'default') {
            def version = resolveDefaultVersion(project, details.requested.group, details.requested.name)
            details.useVersion version
        }
    }

    def resolveDefaultVersion(Project project, String group, String name) {
        project.logger.debug("Resolving default dependency for $group:$name")
        println "Resolving default dependency for $group:$name"
        defaultVersionsMap["$group:$name"]
    }
}

以及运行uploadArchives 的输出，请注意插件在每个项目的第一个任务（compileJava）期间运行，而不是uploadArchives：

$ gradle uploadArchives
:common:compileJava
Resolving default dependency for javax.servlet:servlet-api
Resolving default dependency for log4j:log4j
:common:compileJava UP-TO-DATE
:common:processResources UP-TO-DATE
:common:classes UP-TO-DATE
:common:jar UP-TO-DATE
:foo:compileJava
Resolving default dependency for javax.servlet:servlet-api
Resolving default dependency for log4j:log4j
:foo:compileJava UP-TO-DATE
:foo:processResources UP-TO-DATE
:foo:classes UP-TO-DATE
:foo:jar UP-TO-DATE
:bar:compileJava
Resolving default dependency for javax.servlet:servlet-api
Resolving default dependency for log4j:log4j
:bar:compileJava UP-TO-DATE
:bar:processResources UP-TO-DATE
:bar:classes UP-TO-DATE
:bar:jar UP-TO-DATE
:bar:uploadArchives
Uploading: com/overtherainbow/bar/1.0-SNAPSHOT/bar-1.0-SNAPSHOT.jar to...
Transferring 19K from remote
Uploaded 19K
:common:uploadArchives
Uploading: com/overtherainbow/common/1.0-SNAPSHOT/common-1.0-SNAPSHOT.jar to...
Transferring 5K from remote
Uploaded 5K
:foo:uploadArchives
Uploading: com/overtherainbow/foo/1.0-SNAPSHOT/foo-1.0-SNAPSHOT.jar to...
Transferring 15K from remote
Uploaded 15K

下面是生成的 pom 文件的依赖项部分，注意版本设置为默认值：

<dependencies>
  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>default</version>
    <scope>compile</scope>
  </dependency>
  <dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>default</version>
    <scope>compile</scope>
  </dependency>
</dependencies>
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