[MBUILDCACHE-26] Ensure the maven version is >= 3.9.0-SNAPSHOT (apache#32)

Author: gnodet

src/main/java/org/apache/maven/buildcache/xml/CacheConfigImpl.java

@@ -62,6 +62,7 @@
 import org.apache.maven.model.Plugin;
 import org.apache.maven.model.PluginExecution;
 import org.apache.maven.plugin.MojoExecution;
+import org.apache.maven.rtinfo.RuntimeInformation;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -102,17 +103,19 @@ public class CacheConfigImpl implements org.apache.maven.buildcache.xml.CacheCon
 
  private final XmlService xmlService;
  private final MavenSession session;
+ private final RuntimeInformation rtInfo;
 
  private volatile CacheState state;
  private CacheConfig cacheConfig;
  private HashFactory hashFactory;
  private List<Pattern> excludePatterns;
 
  @Inject
- public CacheConfigImpl( XmlService xmlService, MavenSession session )
+ public CacheConfigImpl( XmlService xmlService, MavenSession session, RuntimeInformation rtInfo )
  {
  this.xmlService = xmlService;
  this.session = session;
+ this.rtInfo = rtInfo;
  }
 
  @Nonnull
@@ -126,7 +129,14 @@ public CacheState initialize()
  if ( state == null )
  {
  final String enabled = getProperty( CACHE_ENABLED_PROPERTY_NAME, "true" );
- if ( !Boolean.parseBoolean( enabled ) )
+
+ if ( !rtInfo.isMavenVersion( "[3.9.0-SNAPSHOT,)" ) )
+ {
+ LOGGER.warn( "Cache requires Maven >= 3.9, but version is " + rtInfo.getMavenVersion()
+ + ". Disabling cache." );
+ state = CacheState.DISABLED;
+ }
+ else if ( !Boolean.parseBoolean( enabled ) )
  {
  LOGGER.info(
  "Cache disabled by command line flag, project will be built fully and not cached" );