由于没有答案，我不得不自己寻找答案。
Jetty 有一个功能，允许您将 WAR 文件放到一个目录中，然后它会加载它们。为了利用它，您必须弄清楚它正在查找的目录，或者告诉它要查找的目录。我选择了第二个选项。
指定部署目录的最简单方法是将其放在 gretty 选项中指定的“serverConfigFile”中。
gretty {
serverConfigFile = "$contextFile"
servletContainer = 'jetty9.4'
jvmArgs <--- a bunch of arguments go here --->
}
Jetty 在“etc”目录下附带了一堆配置文件。我恶毒而公然地抄袭了主要的 Jetty 配置文件以及部署管理器配置文件 - 但将路径设置为我选择的一个。我创建了一个写入 serverConfigFile 的任务。
task createJettyContextsFile {
doLast {
new File("$contextFile").text =
"""<?xml version="1.0"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_3.dtd">
<!-- =============================================================== -->
<!-- Documentation of this file format can be found at: -->
<!-- https://www.eclipse.org/jetty/documentation/current/ -->
<!-- -->
<!-- Additional configuration files are available in JETTY_HOME/etc -->
<!-- and can be mixed in. See start.ini file for the default -->
<!-- configuration files. -->
<!-- -->
<!-- For a description of the configuration mechanism, see the -->
<!-- output of: -->
<!-- java -jar start.jar -? -->
<!-- =============================================================== -->
<!-- =============================================================== -->
<!-- Configure a Jetty Server instance with an ID "Server" -->
<!-- Other configuration files may also configure the "Server" -->
<!-- ID, in which case they are adding configuration to the same -->
<!-- instance. If other configuration have a different ID, they -->
<!-- will create and configure another instance of Jetty. -->
<!-- Consult the javadoc of o.e.j.server.Server for all -->
<!-- configuration that may be set here. -->
<!-- =============================================================== -->
<Configure id="Server" class="org.eclipse.jetty.server.Server">
<Arg name="threadpool"><Ref refid="threadPool"/></Arg>
<!-- =========================================================== -->
<!-- Add shared Scheduler instance -->
<!-- =========================================================== -->
<Call name="addBean">
<Arg>
<New class="org.eclipse.jetty.util.thread.ScheduledExecutorScheduler"/>
</Arg>
</Call>
<!-- =========================================================== -->
<!-- Http Configuration. -->
<!-- This is a common configuration instance used by all -->
<!-- connectors that can carry HTTP semantics (HTTP, HTTPS, etc.)-->
<!-- It configures the non wire protocol aspects of the HTTP -->
<!-- semantic. -->
<!-- -->
<!-- This configuration is only defined here and is used by -->
<!-- reference from other XML files such as jetty-http.xml, -->
<!-- jetty-https.xml and other configuration files which -->
<!-- instantiate the connectors. -->
<!-- -->
<!-- Consult the javadoc of o.e.j.server.HttpConfiguration -->
<!-- for all configuration that may be set here. -->
<!-- =========================================================== -->
<New id="httpConfig" class="org.eclipse.jetty.server.HttpConfiguration">
<Set name="secureScheme"><Property name="jetty.httpConfig.secureScheme" default="https" /></Set>
<Set name="securePort"><Property name="jetty.httpConfig.securePort" deprecated="jetty.secure.port" default="8443" /></Set>
<Set name="outputBufferSize"><Property name="jetty.httpConfig.outputBufferSize" deprecated="jetty.output.buffer.size" default="32768" /></Set>
<Set name="outputAggregationSize"><Property name="jetty.httpConfig.outputAggregationSize" deprecated="jetty.output.aggregation.size" default="8192" /></Set>
<Set name="requestHeaderSize"><Property name="jetty.httpConfig.requestHeaderSize" deprecated="jetty.request.header.size" default="8192" /></Set>
<Set name="responseHeaderSize"><Property name="jetty.httpConfig.responseHeaderSize" deprecated="jetty.response.header.size" default="8192" /></Set>
<Set name="sendServerVersion"><Property name="jetty.httpConfig.sendServerVersion" deprecated="jetty.send.server.version" default="true" /></Set>
<Set name="sendDateHeader"><Property name="jetty.httpConfig.sendDateHeader" deprecated="jetty.send.date.header" default="false" /></Set>
<Set name="headerCacheSize"><Property name="jetty.httpConfig.headerCacheSize" default="4096" /></Set>
<Set name="delayDispatchUntilContent"><Property name="jetty.httpConfig.delayDispatchUntilContent" deprecated="jetty.delayDispatchUntilContent" default="true"/></Set>
<Set name="maxErrorDispatches"><Property name="jetty.httpConfig.maxErrorDispatches" default="10"/></Set>
<Set name="blockingTimeout"><Property deprecated="jetty.httpConfig.blockingTimeout" name="jetty.httpConfig.blockingTimeout.DEPRECATED" default="-1"/></Set>
<Set name="persistentConnectionsEnabled"><Property name="jetty.httpConfig.persistentConnectionsEnabled" default="true"/></Set>
<Set name="requestCookieCompliance"><Call class="org.eclipse.jetty.http.CookieCompliance" name="valueOf"><Arg><Property name="jetty.httpConfig.requestCookieCompliance" deprecated="jetty.httpConfig.cookieCompliance" default="RFC6265"/></Arg></Call></Set>
<Set name="responseCookieCompliance"><Call class="org.eclipse.jetty.http.CookieCompliance" name="valueOf"><Arg><Property name="jetty.httpConfig.responseCookieCompliance" default="RFC6265"/></Arg></Call></Set>
<Set name="multiPartFormDataCompliance"><Call class="org.eclipse.jetty.server.MultiPartFormDataCompliance" name="valueOf"><Arg><Property name="jetty.httpConfig.multiPartFormDataCompliance" default="RFC7578"/></Arg></Call></Set>
</New>
<!-- =========================================================== -->
<!-- Set the default handler structure for the Server -->
<!-- A handler collection is used to pass received requests to -->
<!-- both the ContextHandlerCollection, which selects the next -->
<!-- handler by context path and virtual host, and the -->
<!-- DefaultHandler, which handles any requests not handled by -->
<!-- the context handlers. -->
<!-- Other handlers may be added to the "Handlers" collection, -->
<!-- for example the jetty-requestlog.xml file adds the -->
<!-- RequestLogHandler after the default handler -->
<!-- =========================================================== -->
<Set name="handler">
<New id="Handlers" class="org.eclipse.jetty.server.handler.HandlerCollection">
<Set name="handlers">
<Array type="org.eclipse.jetty.server.Handler">
<Item>
<New id="Contexts" class="org.eclipse.jetty.server.handler.ContextHandlerCollection"/>
</Item>
<Item>
<New id="DefaultHandler" class="org.eclipse.jetty.server.handler.DefaultHandler"/>
</Item>
</Array>
</Set>
</New>
</Set>
<!-- =========================================================== -->
<!-- extra server options -->
<!-- =========================================================== -->
<Set name="stopAtShutdown"><Property name="jetty.server.stopAtShutdown" default="true"/></Set>
<Set name="stopTimeout"><Property name="jetty.server.stopTimeout" default="5000"/></Set>
<Set name="dumpAfterStart"><Property name="jetty.server.dumpAfterStart" deprecated="jetty.dump.start" default="false"/></Set>
<Set name="dumpBeforeStop"><Property name="jetty.server.dumpBeforeStop" deprecated="jetty.dump.stop" default="false"/></Set>
<Call name="addBean">
<Arg>
<New id="DeploymentManager" class="org.eclipse.jetty.deploy.DeploymentManager">
<Set name="contexts">
<Ref refid="Contexts" />
</Set>
<Call name="setContextAttribute">
<Arg>org.eclipse.jetty.server.webapp.ContainerIncludeJarPattern</Arg>
<Arg>.*/[^/]*servlet-api-[^/]*\\.jar\$|.*/javax.servlet.jsp.jstl-.*\\.jar\$|.*/org.apache.taglibs.taglibs-standard-impl-.*\\.jar\$</Arg>
</Call>
<Call id="webappprovider" name="addAppProvider">
<Arg>
<New class="org.eclipse.jetty.deploy.providers.WebAppProvider">
<Set name="monitoredDirName">
<Property>
<Name>jetty.deploy.monitoredPath</Name>
<Default>
<Property name="jetty.deploy.monitoredDir" deprecated="jetty.deploy.monitoredDirName" default="$deployDirectory"/>
</Default>
</Property>
</Set>
<Set name="defaultsDescriptor">
<Property>
<Name>jetty.deploy.defaultsDescriptorPath</Name>
<Default>
<Property name="jetty.home" default="." />/etc/webdefault.xml
</Default>
</Property>
</Set>
<Set name="scanInterval"><Property name="jetty.deploy.scanInterval" default="1"/></Set>
<Set name="extractWars"><Property name="jetty.deploy.extractWars" default="true"/></Set>
<Set name="configurationManager">
<New class="org.eclipse.jetty.deploy.PropertiesConfigurationManager">
</New>
</Set>
</New>
</Arg>
</Call>
</New>
</Arg>
</Call>
</Configure>
"""
}
}
然后我添加了一个任务，将 WAR 文件复制到正确的目录中。
task copyWar(type: Copy) {
dependsOn ":cm:buildPS", ":laoi:war", 'createJettyContextsFile'
from("$rootLibs") {
include "*.war"
}
into("$deployDirectory")
}
我不得不稍微调整一下任务依赖关系，但现在启动 Jetty 服务器的 Gretty 任务都将在我正确部署的 WAR 文件的情况下运行。