我正在处理Gradle脚本，我需要阅读local.properties文件并使用build.gradle中属性文件中的值。我是以下面的方式做的。我运行下面的脚本，它现在抛出一个错误，但它也没有做任何事情，如创建，删除和复制文件。我试图打印变量的值，它显示正确的值。
如果这是正确的方法，有人可以告诉我吗？我认为另一种方法是在gradle.properties中定义所有内容并在build.gradle中使用它。有人可以告诉我如何从build.gradle访问build.properties中的媒体资源？
build.gradle档案：
apply plugin: 'java'
//-- set the group for publishing
group = 'com.true.test'
/**
* Initializing GAVC settings
*/
def buildProperties = new Properties()
file("version.properties").withInputStream {
stream -> buildProperties.load(stream)
}
//if jenkins build, add the jenkins build version to the version. Else add snapshot version to the version.
def env = System.getenv()
if (env["BUILD_NUMBER"]) buildProperties.test+= ".${env["BUILD_NUMBER"]}"
version = buildProperties.test
println "${version}"
//name is set in the settings.gradle file
group = "com.true.test"
version = buildProperties.test
println "Building ${project.group}:${project.name}:${project.version}"
Properties properties = new Properties()
properties.load(project.file('build.properties').newDataInputStream())
def folderDir = properties.getProperty('build.dir')
def configDir = properties.getProperty('config.dir')
def baseDir = properties.getProperty('base.dir')
def logDir = properties.getProperty('log.dir')
def deployDir = properties.getProperty('deploy.dir')
def testsDir = properties.getProperty('tests.dir')
def packageDir = properties.getProperty('package.dir')
def wrapperDir = properties.getProperty('wrapper.dir')
sourceCompatibility = 1.7
compileJava.options.encoding = 'UTF-8'
repositories {
maven { url "http://arti.oven.c:9000/release" }
}
task swipe(type: Delete) {
println "Delete $projectDir/${folderDir}"
delete "$projectDir/$folderDir"
delete "$projectDir/$logDir"
delete "$projectDir/$deployDir"
delete "$projectDir/$packageDir"
delete "$projectDir/$testsDir"
mkdir("$projectDir/${folderDir}")
mkdir("projectDir/${logDir}")
mkdir("projectDir/${deployDir}")
mkdir("projectDir/${packageDir}")
mkdir("projectDir/${testsDir}")
}
task prepConfigs(type: Copy, overwrite:true, dependsOn: swipe) {
println "The name of ${projectDir}/${folderDir} and ${projectDir}/${configDir}"
from('${projectDir}/${folderDir}')
into('${projectDir}/$configDir}')
include('*.xml')
}
build.properties档案：
# -----------------------------------------------------------------
# General Settings
# -----------------------------------------------------------------
application.name = Admin
project.name = Hello Cool
# -----------------------------------------------------------------
# ant build directories
# -----------------------------------------------------------------
sandbox.dir = ${projectDir}/../..
reno.root.dir=${sandbox.dir}/Reno
ant.dir = ${projectDir}/ant
build.dir = ${ant.dir}/build
log.dir = ${ant.dir}/logs
config.dir = ${ant.dir}/configs
deploy.dir = ${ant.dir}/deploy
static.dir = ${ant.dir}/static
package.dir = ${ant.dir}/package
tests.dir = ${ant.dir}/tests
tests.logs.dir = ${tests.dir}/logs
external.dir = ${sandbox.dir}/FlexCommon/External
external.lib.dir = ${external.dir}/libs
答案 0 :(得分：57)
如果使用默认的gradle.properties文件，您可以直接从build.gradle文件中访问这些属性：
gradle.properties：
applicationName=Admin
projectName=Hello Cool
build.gradle：
task printProps {
doFirst {
println applicationName
println projectName
}
}
如果您需要访问自定义文件，或访问其中包含.的属性（您似乎需要这样做），则可以在build.gradle文件中执行以下操作：
def props = new Properties()
file("build.properties").withInputStream { props.load(it) }
task printProps {
doFirst {
println props.getProperty("application.name")
println props.getProperty("project.name")
}
}
请查看this section of the Gradle documentation了解详情。
如果您想动态设置其中一些属性（如下面的评论中所述），您可以创建一个properties.gradle文件（名称并不重要）并要求它在build.gradle脚本中。
properties.gradle：
ext {
subPath = "some/sub/directory"
fullPath = "$projectDir/$subPath"
}
build.gradle
apply from: 'properties.gradle'
// prints the full expanded path
println fullPath
答案 1 :(得分：6)
我们可以使用一个单独的文件（在我的情况下为config.groovy）来抽象出所有配置。注意我们如何分离出通用配置的逻辑：
config.groovy resources {
serverName = 'localhost'
serverPort = '8090'
}
environments {
dev {
serverName = 'http://localhost'
serverPort = '8080'
}
test {
serverName = 'http://www.testserver.com'
serverPort = '5211'
resources {
serverName = 'resources.testserver.com'
}
}
prod {
serverName = 'http://www.productionserver.com'
serverPort = '80'
resources {
serverName = 'resources.productionserver.com'
serverPort = '80'
}
}
}
属性文件准备就绪后，我们可以在build.gradle中使用以下内容来加载这些设置：
build.gradle loadProperties()
def loadProperties() {
def environment = hasProperty('env') ? env : 'dev'
println "Current Environment: " + environment
def configFile = file('config.groovy')
def config = new ConfigSlurper(environment).parse(configFile.toURL())
project.ext.config = config
}
task printProperties {
println "serverName: $config.serverName"
println "serverPort: $config.serverPort"
println "resources.serverName: $config.resources.serverName"
println "resources.serverPort: $config.resources.serverPort"
}
让我们用不同的输入集来运行它们：
gradle -q printProperties
Current Environment: dev
serverName: http://localhost
serverPort: 8080
resources.serverName: localhost
resources.serverPort: 8090
gradle -q -Penv=dev printProperties
Current Environment: dev
serverName: http://localhost
serverPort: 8080
resources.serverName: localhost
resources.serverPort: 8090
gradle -q -Penv=test printProperties
Current Environment: test
serverName: http://www.testserver.com
serverPort: 5211
resources.serverName: resources.testserver.com
resources.serverPort: 8090
gradle -q -Penv=prod printProperties
Current Environment: prod
serverName: http://www.productionserver.com
serverPort: 80
resources.serverName: resources.productionserver.com
resources.serverPort: 80
答案 2 :(得分：0)
另一种方法...在build.gradle中：
添加：
classpath 'org.flywaydb:flyway-gradle-plugin:3.1'
这：
def props = new Properties()
file("src/main/resources/application.properties").withInputStream { props.load(it) }
apply plugin: 'flyway'
flyway {
url = props.getProperty("spring.datasource.url")
user = props.getProperty("spring.datasource.username")
password = props.getProperty("spring.datasource.password")
schemas = ['db_example']
}