Build failure on Java11+

[jricher]

When trying to build on Java11+, the following error occurs when building the openid-connect-server-webapp module:

[ERROR] Failed to execute goal ro.isdc.wro4j:wro4j-maven-plugin:1.10.1:run (default) on project openid-connect-server-webapp: Execution default of goal ro.isdc.wro4j:wro4j-maven-plugin:1.10.1:run failed: Plugin ro.isdc.wro4j:wro4j-maven-plugin:1.10.1 or one of its dependencies could not be resolved: Failed to collect dependencies for ro.isdc.wro4j:wro4j-maven-plugin:jar:1.10.1 (): Could not resolve version conflict among [ro.isdc.wro4j:wro4j-maven-plugin:jar:1.10.1 -> ro.isdc.wro4j:wro4j-extensions:jar:1.10.1 -> org.webjars.npm:jshint:jar:2.11.0 -> org.webjars.npm:minimatch:jar:[3.0.2,3.1), ro.isdc.wro4j:wro4j-maven-plugin:jar:1.10.1 -> ro.isdc.wro4j:wro4j-extensions:jar:1.10.1 -> org.webjars.npm:jshint:jar:2.11.0 -> org.webjars.npm:cli:jar:[1.0.0,1.1) -> org.webjars.npm:glob:jar:[7.1.1,8) -> org.webjars.npm:minimatch:jar:[3.1.1,4)] -> [Help 1]

[chirontt]

Similar issue has been reported in the wro4j project: wro4j/wro4j#1129

The above issue also mentioned a fix by dropping the wro4j version back to 1.9.0. I've tried this older wro4j version with this project and the build now works fine for me.

[chirontt]

Alternatively, instead of reverting the wro4j version back to 1.9.0, it can keep the latest version (1.10.1) but with an exclusion on the wro4j-maven-plugin's dependencies to exclude the conflicting org.webjars.npm:minimatch, i.e.

				<plugin>
					<groupId>ro.isdc.wro4j</groupId>
					<artifactId>wro4j-maven-plugin</artifactId>
					<version>1.10.1</version>
					<executions>
						<execution>
							<phase>compile</phase>
							<goals>
								<goal>run</goal>
							</goals>
						</execution>
					</executions>
					<dependencies>
						<dependency>
							<groupId>ro.isdc.wro4j</groupId>
							<artifactId>wro4j-extensions</artifactId>
							<version>1.10.1</version>
							<exclusions>
								<exclusion>
									<groupId>org.webjars.npm</groupId>
									<artifactId>minimatch</artifactId>
								</exclusion>
							</exclusions>
						</dependency>
					</dependencies>
				</plugin>

With the above change, openid-connect-server-webapp now compiles fine with JDK11, and no problem in running the resulting webapp with mvn jetty:run-war command.