v1.1.1 pom

README.md

@@ -31,13 +31,14 @@ This is a maven plugin that allows for developers and organizations to ban Maven
                         </artifact>
                         <artifact>com.inteligr8:ban-maven-plugin:[,1.0.0)</artifact>
                         <artifact>log4j:log4j</artifact>
-                        <artifact>org\.springframework.*::[,4.0.0.RELEASE)</artifact>
+                        <artifact>org\.springframe.+::[,4.0.0.RELEASE)</artifact>
                     </includes>
                     <excludes>
                     	   <artifact>
                     	       ....
                     	   </artifact>
                     </excludes>
+                    <import>https://domain:port/path/file</import>
                 </configuration>
             </plugin>
             ...
@@ -61,5 +62,3 @@ The `version` element supports the standard Maven specification.  You can match
 There is nothing stopping you from specifying two `artifact` elements with the exact same values.  So you can ban multiple version ranges of the same artifact by using multiple `artifact` elements.
 
 If you *include* all versions by omitting the `version` element, you can still *exclude* (unban) certain versions, like `[1.2.17,)`.
-
-It is recommended that you look into [Maven Tiles](https://github.com/repaint-io/maven-tiles) so you can use a tile to define your banned artifacts and side load them into all your projects.

pom.xml

@@ -7,7 +7,7 @@
 
 	<groupId>com.inteligr8</groupId>
 	<artifactId>ban-maven-plugin</artifactId>
-	<version>1.0.0</version>
+	<version>1.1.1</version>
 	<packaging>maven-plugin</packaging>
 
 	<name>Ban Dependencies Maven Plugin</name>
@@ -146,7 +146,6 @@
 				<configuration>
 					<projectsDirectory>${basedir}/src/it</projectsDirectory>
 					<cloneProjectsTo>${project.build.directory}/it</cloneProjectsTo>
-					<localRepositoryPath>${project.build.directory}/it-repo</localRepositoryPath>
 					<mavenHome>${env.MAVEN_HOME}</mavenHome>
 					<debug>true</debug>
 					<ignoreFailures>true</ignoreFailures>

src/it/ban-log4j-purge/pom.xml

@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>com.inteligr8</groupId>
+	<artifactId>ban-maven-plugin-log4j-old</artifactId>
+	<version>@pom.version@</version>
+	<packaging>jar</packaging>
+
+	<name>Log4j Ban Plugin Tests</name>
+	
+	<dependencies>
+		<dependency>
+			<groupId>log4j</groupId>
+			<artifactId>log4j</artifactId>
+			<version>1.2.17</version>
+		</dependency>
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>3.11.0</version>
+			</plugin>
+			<plugin>
+				<groupId>${project.groupId}</groupId>
+				<artifactId>ban-maven-plugin</artifactId>
+				<version>@pom.version@</version>
+				<extensions>true</extensions>
+				<configuration>
+					<includes>
+						<artifact>
+							<groupId>log4j</groupId>
+							<artifactId>log4j</artifactId>
+						</artifact>
+					</includes>
+					<excludes>
+						<artifact>log4j:log.+:[1.2.17,)</artifact>
+					</excludes>
+				</configuration>
+				<executions>
+					<execution>
+						<id>purge</id>
+						<phase>prepare-package</phase>
+						<goals><goal>purge-repo</goal></goals>
+					</execution>
+				</executions>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

src/main/java/com/inteligr8/maven/ban/AbstractBanConfiguration.java

@@ -0,0 +1,130 @@
+/*
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.inteligr8.maven.ban;
+
+import java.io.IOException;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.apache.commons.lang3.StringUtils;
+import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException;
+import org.apache.maven.artifact.versioning.VersionRange;
+import org.apache.maven.plugin.MojoFailureException;
+import org.codehaus.plexus.util.xml.Xpp3Dom;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.inteligr8.maven.model.ArtifactFilter;
+
+public class AbstractBanConfiguration implements BanConfiguration {
+    
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    private final Pattern artifactPattern = Pattern.compile("^([^:]+):([^:]+)(:([^:]+))?$");
+    private final Pattern notRegexPattern = Pattern.compile("^[A-Za-z0-9_\\.]*$");
+    
+    private final List<ArtifactFilter> includeArtifacts = new LinkedList<>();
+    private final List<ArtifactFilter> excludeArtifacts = new LinkedList<>();
+    
+    public void init(Xpp3Dom rootDom) throws IOException, MojoFailureException {
+        if (rootDom == null)
+            return;
+        
+        Xpp3Dom importDom = rootDom.getChild("import");
+        if (importDom != null) {
+            String url = StringUtils.trimToNull(importDom.getValue());
+            BanConfigurationDownloader downloader = new BanConfigurationDownloader(url);
+            this.includeArtifacts.addAll(downloader.getIncludeArtifacts());
+            this.excludeArtifacts.addAll(downloader.getExcludeArtifacts());
+        }
+        
+        Xpp3Dom includesDom = rootDom.getChild("includes");
+        if (includesDom != null)
+            this.includeArtifacts.addAll(this.parseArtifacts(includesDom));
+        
+        Xpp3Dom excludesDom = rootDom.getChild("excludes");
+        if (excludesDom != null)
+            this.excludeArtifacts.addAll(this.parseArtifacts(excludesDom));
+        
+        this.logger.debug("Include artifacts: {}", this.includeArtifacts);
+        this.logger.debug("Exclude artifacts: {}", this.excludeArtifacts);
+    }
+    
+    public List<ArtifactFilter> getIncludeArtifacts() {
+        return this.includeArtifacts;
+    }
+    
+    public List<ArtifactFilter> getExcludeArtifacts() {
+        return this.excludeArtifacts;
+    }
+    
+    private List<ArtifactFilter> parseArtifacts(Xpp3Dom artifactsDom) {
+        List<ArtifactFilter> filters = new LinkedList<>();
+        
+        for (Xpp3Dom artifactDom : artifactsDom.getChildren("artifact")) {
+            ArtifactFilter filter = new ArtifactFilter();
+            String versionSpec = null;
+            if (artifactDom.getChildCount() == 0) {
+                Matcher matcher = this.artifactPattern.matcher(artifactDom.getValue());
+                if (!matcher.matches()) {
+                    this.logger.warn("The artifact format '{}' does not match the expected regular expression: {}; ignoring ...", artifactDom.getValue(), this.artifactPattern.pattern());
+                    continue;
+                }
+                
+                if (this.notRegexPattern.matcher(matcher.group(1)).matches()) {
+                    filter.setGroupId(StringUtils.trimToNull(matcher.group(1)));
+                } else {
+                    filter.setGroupIdRegex(StringUtils.trimToNull(matcher.group(1)));
+                }
+                
+                if (this.notRegexPattern.matcher(matcher.group(2)).matches()) {
+                    filter.setArtifactId(StringUtils.trimToNull(matcher.group(2)));
+                } else {
+                    filter.setArtifactIdRegex(StringUtils.trimToNull(matcher.group(2)));
+                }
+                
+                versionSpec = StringUtils.trimToNull(matcher.group(4));
+            } else {
+                filter.setGroupId(this.getChildValue(artifactDom, "groupId"));
+                filter.setGroupIdRegex(this.getChildValue(artifactDom, "groupIdRegex"));
+                filter.setArtifactId(this.getChildValue(artifactDom, "artifactId"));
+                filter.setArtifactIdRegex(this.getChildValue(artifactDom, "artifactIdRegex"));
+
+                versionSpec = this.getChildValue(artifactDom, "version");
+            }
+
+            if (versionSpec != null) {
+                try {
+                    VersionRange versionRange = VersionRange.createFromVersionSpec(versionSpec);
+                    filter.setVersionRange(versionRange);
+                } catch (InvalidVersionSpecificationException ivse) {
+                    this.logger.warn("The artifact '{}' has an invalid version specification; the artifact element will be ignored: {}", ivse.getMessage());
+                    continue;
+                }
+            }
+
+            filters.add(filter);
+        }
+        
+        return filters;
+    }
+    
+    private String getChildValue(Xpp3Dom dom, String child) {
+        Xpp3Dom childDom = dom.getChild(child);
+        return childDom == null ? null : StringUtils.trimToNull(childDom.getValue());
+    }
+    
+}

src/main/java/com/inteligr8/maven/ban/BanConfiguration.java

@@ -0,0 +1,27 @@
+/*
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.inteligr8.maven.ban;
+
+import java.util.List;
+
+import com.inteligr8.maven.model.ArtifactFilter;
+
+public interface BanConfiguration {
+    
+    List<ArtifactFilter> getIncludeArtifacts();
+    
+    List<ArtifactFilter> getExcludeArtifacts(); 
+    
+}

src/main/java/com/inteligr8/maven/ban/BanConfigurationDownloader.java

@@ -0,0 +1,54 @@
+/*
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.inteligr8.maven.ban;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+
+import org.apache.maven.plugin.MojoFailureException;
+import org.codehaus.plexus.util.xml.Xpp3Dom;
+import org.codehaus.plexus.util.xml.Xpp3DomBuilder;
+import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class BanConfigurationDownloader extends AbstractBanConfiguration {
+    
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    
+    public BanConfigurationDownloader(String url) throws IOException, MojoFailureException {
+        try {
+            Xpp3Dom rootDom = this.load(new URL(url));
+            this.init(rootDom);
+        } catch (XmlPullParserException xppe) {
+            throw new MojoFailureException(xppe.getMessage(), xppe);
+        }
+    }
+    
+    private Xpp3Dom load(URL url) throws IOException, XmlPullParserException {
+        InputStream istream = url.openStream();
+        BufferedInputStream bistream = new BufferedInputStream(istream, 16384);
+        try {
+            this.logger.debug("Downloading configuration: {}", url);
+            return Xpp3DomBuilder.build(bistream, "utf-8");
+        } finally {
+            bistream.close();
+        }
+        
+    }
+    
+}

src/main/java/com/inteligr8/maven/ban/BanConfigurationParser.java

@@ -14,172 +14,17 @@
  */
 package com.inteligr8.maven.ban;
 
-import java.util.Collections;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
+import java.io.IOException;
 
-import org.apache.commons.lang3.StringUtils;
-import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
-import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException;
-import org.apache.maven.artifact.versioning.VersionRange;
 import org.apache.maven.model.Plugin;
+import org.apache.maven.plugin.MojoFailureException;
 import org.codehaus.plexus.util.xml.Xpp3Dom;
-import org.eclipse.aether.artifact.Artifact;
-import org.eclipse.aether.graph.DependencyFilter;
-import org.eclipse.aether.graph.DependencyNode;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
-import com.inteligr8.maven.model.ArtifactFilter;
+public class BanConfigurationParser extends AbstractBanConfiguration {
     
-public class BanConfigurationParser implements DependencyFilter {
-    
-    private final Logger logger = LoggerFactory.getLogger(this.getClass());
-    private final Pattern artifactPattern = Pattern.compile("^([^:]+):([^:]+)(:([^:]+))?$");
-    private final Pattern notRegexPattern = Pattern.compile("^[A-Za-z0-9_\\.]*$");
-    
-    private final List<ArtifactFilter> includeArtifacts;
-    private final List<ArtifactFilter> excludeArtifacts;
-    private boolean failFast = false;
-    
-    public BanConfigurationParser(Plugin plugin) {
+    public BanConfigurationParser(Plugin plugin) throws IOException, MojoFailureException {
         Xpp3Dom rootDom = (Xpp3Dom) plugin.getConfiguration();
-        if (rootDom == null) {
-            this.includeArtifacts = Collections.emptyList();
-            this.excludeArtifacts = Collections.emptyList();
-            return;
-        }
-        
-        Xpp3Dom includesDom = rootDom.getChild("includes");
-        if (includesDom != null) {
-            this.includeArtifacts = this.parseArtifacts(includesDom);
-            this.logger.debug("Include artifacts: {}", this.includeArtifacts);
-        } else {
-            this.includeArtifacts = Collections.emptyList();
-        }
-        
-        Xpp3Dom excludesDom = rootDom.getChild("excludes");
-        if (excludesDom != null) {
-            this.excludeArtifacts = this.parseArtifacts(excludesDom);
-            this.logger.debug("Exclude artifacts: {}", this.excludeArtifacts);
-        } else {
-            this.excludeArtifacts = Collections.emptyList();
-        }
-    }
-    
-    public void setFailFast(boolean failFast) {
-        this.failFast = failFast;
-    }
-    
-    private List<ArtifactFilter> parseArtifacts(Xpp3Dom artifactsDom) {
-        List<ArtifactFilter> filters = new LinkedList<>();
-        
-        for (Xpp3Dom artifactDom : artifactsDom.getChildren("artifact")) {
-            ArtifactFilter filter = new ArtifactFilter();
-            String versionSpec = null;
-            if (artifactDom.getChildCount() == 0) {
-                Matcher matcher = this.artifactPattern.matcher(artifactDom.getValue());
-                if (!matcher.matches()) {
-                    this.logger.warn("The artifact format '{}' does not match the expected regular expression: {}; ignoring ...", artifactDom.getValue(), this.artifactPattern.pattern());
-                    continue;
-                }
-                
-                if (this.notRegexPattern.matcher(matcher.group(1)).matches()) {
-                    filter.setGroupId(StringUtils.trimToNull(matcher.group(1)));
-                } else {
-                    filter.setGroupIdRegex(StringUtils.trimToNull(matcher.group(1)));
-                }
-                
-                if (this.notRegexPattern.matcher(matcher.group(1)).matches()) {
-                    filter.setArtifactId(StringUtils.trimToNull(matcher.group(2)));
-                } else {
-                    filter.setArtifactIdRegex(StringUtils.trimToNull(matcher.group(2)));
-                }
-                
-                versionSpec = StringUtils.trimToNull(matcher.group(4));
-            } else {
-                filter.setGroupId(this.getChildValue(artifactDom, "groupId"));
-                filter.setGroupIdRegex(this.getChildValue(artifactDom, "groupIdRegex"));
-                filter.setArtifactId(this.getChildValue(artifactDom, "artifactId"));
-                filter.setArtifactIdRegex(this.getChildValue(artifactDom, "artifactIdRegex"));
-
-                versionSpec = this.getChildValue(artifactDom, "version");
-            }
-
-            if (versionSpec != null) {
-                try {
-                    VersionRange versionRange = VersionRange.createFromVersionSpec(versionSpec);
-                    filter.setVersionRange(versionRange);
-                } catch (InvalidVersionSpecificationException ivse) {
-                    this.logger.warn("The artifact '{}' has an invalid version specification; the artifact element will be ignored: {}", ivse.getMessage());
-                    continue;
-                }
-            }
-
-            filters.add(filter);
-        }
-        
-        return filters;
-    }
-    
-    private String getChildValue(Xpp3Dom dom, String child) {
-        Xpp3Dom childDom = dom.getChild(child);
-        return childDom == null ? null : StringUtils.trimToNull(childDom.getValue());
-    }
-    
-    @Override
-    public boolean accept(DependencyNode node, List<DependencyNode> parents) {
-        this.logger.debug("Evaluating dependency '{}'", node);
-        boolean ban = false;
-        
-        for (ArtifactFilter afilter : this.includeArtifacts) {
-            Artifact depArtifact = node.getArtifact();
-            if (this.matches(afilter.getGroupId(), afilter.getGroupIdRegex(), depArtifact.getGroupId()) &&
-                    this.matches(afilter.getArtifactId(), afilter.getArtifactIdRegex(), depArtifact.getArtifactId()) &&
-                    this.withinRange(afilter.getVersionRange(), depArtifact.getVersion())) {
-                this.logger.debug("The dependency '{}' matches the ban inclusion filter", depArtifact);
-                ban = true;
-                break;
-            }
-        }
-        
-        if (!ban)
-            return false;
-        
-        for (ArtifactFilter afilter : this.excludeArtifacts) {
-            Artifact depArtifact = node.getArtifact();
-            if (this.matches(afilter.getGroupId(), afilter.getGroupIdRegex(), depArtifact.getGroupId()) &&
-                    this.matches(afilter.getArtifactId(), afilter.getArtifactIdRegex(), depArtifact.getArtifactId()) &&
-                    this.withinRange(afilter.getVersionRange(), depArtifact.getVersion())) {
-                this.logger.debug("The dependency '{}' matches the ban exlusion filter", depArtifact);
-                return false;
-            }
-        }
-        
-        if (this.failFast) {
-            // plugin resolution downloads banned dependencies unless we fail now; not later
-            throw new RuntimeException("Banned dependency detected: " + node + " => " + parents);
-        } else {
-            return true;
-        }
-    }
-    
-    private boolean matches(String exactFilter, String regexFilter, String value) {
-        if (exactFilter == null && regexFilter == null) {
-            return true;
-        } else if (exactFilter != null) {
-            return exactFilter.equals(value);
-        } else {
-            Pattern filterPattern = Pattern.compile(regexFilter);
-            Matcher matcher = filterPattern.matcher(value);
-            return matcher.matches();
-        }
-    }
-    
-    private boolean withinRange(VersionRange versionRange, String version) {
-        return versionRange == null || versionRange.containsVersion(new DefaultArtifactVersion(version));
+        this.init(rootDom);
     }
     
 }

src/main/java/com/inteligr8/maven/ban/BanDependencyFilter.java

@@ -0,0 +1,102 @@
+/*
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.inteligr8.maven.ban;
+
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
+import org.apache.maven.artifact.versioning.VersionRange;
+import org.eclipse.aether.artifact.Artifact;
+import org.eclipse.aether.graph.DependencyFilter;
+import org.eclipse.aether.graph.DependencyNode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.inteligr8.maven.model.ArtifactFilter;
+
+public class BanDependencyFilter implements DependencyFilter {
+    
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    
+    private final List<ArtifactFilter> includeArtifacts;
+    private final List<ArtifactFilter> excludeArtifacts;
+    private boolean failFast = false;
+    
+    public BanDependencyFilter(List<ArtifactFilter> includeArtifacts, List<ArtifactFilter> excludeArtifacts) {
+        this.includeArtifacts = includeArtifacts;
+        this.excludeArtifacts = excludeArtifacts;
+    }
+    
+    public void setFailFast(boolean failFast) {
+        this.failFast = failFast;
+    }
+    
+    @Override
+    public boolean accept(DependencyNode node, List<DependencyNode> parents) {
+        this.logger.debug("Evaluating dependency '{}'", node);
+        Artifact depArtifact = node.getArtifact();
+        boolean ban = false;
+        
+        for (ArtifactFilter afilter : this.includeArtifacts) {
+            if (this.matches(afilter.getGroupId(), afilter.getGroupIdRegex(), depArtifact.getGroupId()) &&
+                    this.matches(afilter.getArtifactId(), afilter.getArtifactIdRegex(), depArtifact.getArtifactId()) &&
+                    this.withinRange(afilter.getVersionRange(), depArtifact.getVersion())) {
+                this.logger.debug("The dependency '{}' matches the ban inclusion filter", depArtifact);
+                ban = true;
+                break;
+            }
+        }
+        
+        if (!ban)
+            return false;
+        
+        for (ArtifactFilter afilter : this.excludeArtifacts) {
+            if (this.matches(afilter.getGroupId(), afilter.getGroupIdRegex(), depArtifact.getGroupId()) &&
+                    this.matches(afilter.getArtifactId(), afilter.getArtifactIdRegex(), depArtifact.getArtifactId()) &&
+                    this.withinRange(afilter.getVersionRange(), depArtifact.getVersion())) {
+                this.logger.debug("The dependency '{}' matches the ban exlusion filter", depArtifact);
+                return false;
+            }
+        }
+        
+        if (this.failFast) {
+            // plugin resolution downloads banned dependencies unless we fail now; not later
+            throw new RuntimeException("Banned dependency detected: " + node + " => " + parents);
+        } else {
+            return true;
+        }
+    }
+    
+    private boolean matches(String exactFilter, String regexFilter, String value) {
+        if (exactFilter == null && regexFilter == null) {
+            return true;
+        } else if (exactFilter != null) {
+            return exactFilter.equals(value);
+        } else {
+            Pattern filterPattern = Pattern.compile(regexFilter);
+            Matcher matcher = filterPattern.matcher(value);
+            return matcher.matches();
+        }
+    }
+    
+    private boolean withinRange(VersionRange versionRange, String version) {
+        boolean within = versionRange == null || versionRange.containsVersion(new DefaultArtifactVersion(version));
+        this.logger.debug("Tested version range: {} <=> {}: {}", versionRange, version, within);
+        return within;
+    }
+    
+}

src/main/java/com/inteligr8/maven/ban/BanExtension.java

@@ -14,6 +14,7 @@
  */
 package com.inteligr8.maven.ban;
 
+import java.io.IOException;
 import java.util.LinkedList;
 import java.util.List;
 
@@ -25,6 +26,7 @@ import org.apache.maven.AbstractMavenLifecycleParticipant;
 import org.apache.maven.MavenExecutionException;
 import org.apache.maven.execution.MavenSession;
 import org.apache.maven.model.Plugin;
+import org.apache.maven.plugin.MojoFailureException;
 import org.apache.maven.plugin.PluginResolutionException;
 import org.apache.maven.plugin.internal.PluginDependenciesResolver;
 import org.apache.maven.project.DefaultDependencyResolutionRequest;
@@ -44,9 +46,9 @@ import org.slf4j.LoggerFactory;
 @Singleton
 public class BanExtension extends AbstractMavenLifecycleParticipant {
 
-    private static final String THIS_PLUGIN_GROUP_ID = "com.inteligr8";    
-    private static final String THIS_PLUGIN_ARTIFACT_ID = "ban-maven-plugin";
-    private static final String THIS_PLUGIN_KEY = THIS_PLUGIN_GROUP_ID + ":" + THIS_PLUGIN_ARTIFACT_ID;
+    public static final String THIS_PLUGIN_GROUP_ID = "com.inteligr8";    
+    public static final String THIS_PLUGIN_ARTIFACT_ID = "ban-maven-plugin";
+    public static final String THIS_PLUGIN_KEY = THIS_PLUGIN_GROUP_ID + ":" + THIS_PLUGIN_ARTIFACT_ID;
     
     private Logger logger = LoggerFactory.getLogger(this.getClass());
     
@@ -59,18 +61,20 @@ public class BanExtension extends AbstractMavenLifecycleParticipant {
     @Override
     public void afterProjectsRead(MavenSession session) throws MavenExecutionException {
         MavenProject project = session.getCurrentProject();
-        BanConfigurationParser config = this.getConfiguration(project);
+        BanConfiguration config = this.getConfiguration(project);
         if (config == null)
             return;
-        config.setFailFast(true);
+        
+        BanDependencyFilter depFilter = new BanDependencyFilter(config.getIncludeArtifacts(), config.getExcludeArtifacts());
+        depFilter.setFailFast(true);
         
         try {
             for (Plugin plugin : project.getBuildPlugins()) {
                 this.logger.debug("Evaluating plugin dependencies: {}", plugin);
                 
                 Artifact artifact = new DefaultArtifact(plugin.getId());
-                DependencyNode depNodeRoot = this.pluginDepResolver.resolve(plugin, artifact, config, project.getRemotePluginRepositories(), session.getRepositorySession());
-                List<Dependency> bannedDependencies = this.crawlDependencyTree(depNodeRoot, config);
+                DependencyNode depNodeRoot = this.pluginDepResolver.resolve(plugin, artifact, depFilter, project.getRemotePluginRepositories(), session.getRepositorySession());
+                List<Dependency> bannedDependencies = this.crawlDependencyTree(depNodeRoot, depFilter);
                 if (!bannedDependencies.isEmpty())
                     throw new MavenExecutionException("Banned dependencies were detected in plugin '" + plugin + "': " + bannedDependencies, project.getFile());
             }
@@ -78,10 +82,10 @@ public class BanExtension extends AbstractMavenLifecycleParticipant {
             throw new MavenExecutionException(pre.getMessage(), pre);
         }
 
-        config.setFailFast(false);
+        depFilter.setFailFast(false);
 
         DefaultDependencyResolutionRequest request = new DefaultDependencyResolutionRequest(project, session.getRepositorySession());
-        request.setResolutionFilter(config);
+        request.setResolutionFilter(depFilter);
         
         try {
             DependencyResolutionResult result = this.projDepResolver.resolve(request);
@@ -102,7 +106,11 @@ public class BanExtension extends AbstractMavenLifecycleParticipant {
             this.logger.warn("The '{}' plugin must be defined with '<extensions>true</extensions>'; ignoring plugin", plugin.getId());
             return null;
         } else {
-            return new BanConfigurationParser(plugin);
+            try {
+                return new BanConfigurationParser(plugin);
+            } catch (IOException | MojoFailureException e) {
+                throw new MavenExecutionException(e.getMessage(), project.getFile());
+            }
         }
     }
     

src/main/java/com/inteligr8/maven/ban/PurgeRepoMojo.java

@@ -0,0 +1,263 @@
+/*
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.inteligr8.maven.ban;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.FileVisitResult;
+import java.nio.file.FileVisitor;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.function.Consumer;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import javax.inject.Inject;
+
+import org.apache.maven.artifact.versioning.ArtifactVersion;
+import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
+import org.apache.maven.artifact.versioning.VersionRange;
+import org.apache.maven.execution.MavenSession;
+import org.apache.maven.model.Plugin;
+import org.apache.maven.plugin.AbstractMojo;
+import org.apache.maven.plugin.MojoExecutionException;
+import org.apache.maven.plugin.MojoFailureException;
+import org.apache.maven.plugins.annotations.Mojo;
+import org.apache.maven.plugins.annotations.Parameter;
+import org.apache.maven.project.MavenProject;
+import org.codehaus.plexus.component.annotations.Component;
+
+import com.inteligr8.maven.model.ArtifactFilter;
+
+@Mojo( name = "purge-repo", threadSafe = true )
+@Component( role = org.apache.maven.plugin.Mojo.class )
+public class PurgeRepoMojo extends AbstractMojo {
+    
+    @Inject
+    private MavenSession session;
+    
+    @Parameter(name = "skip", defaultValue = "false")
+    private boolean skip = false;
+    
+    @Parameter(name = "dryRun", defaultValue = "false")
+    private boolean dryRun = false;
+    
+    @Override
+    public void execute() throws MojoExecutionException, MojoFailureException {
+        if (this.skip) {
+            this.getLog().debug("Skipping purge of banned artifacts");
+        } else {
+            this.getLog().info("Purging banned artifacts from local repository: " + this.session.getLocalRepository().getBasedir());
+            
+            try {
+                this.purge();
+            } catch (IOException ie) {
+                throw new MojoFailureException(ie.getMessage(), ie);
+            }
+        }
+    }
+    
+    private void purge() throws MojoFailureException, IOException {
+        List<Path> includePaths = new LinkedList<>();
+        
+        BanConfigurationParser config = this.getConfiguration(this.session.getCurrentProject());
+        
+        for (ArtifactFilter afilter : config.getIncludeArtifacts()) {
+            if (afilter.getGroupId() == null) {
+                this.getLog().warn("The purge does not support wildcard group ID specifications, so skipping it: " + afilter);
+                continue;
+            }
+            
+            Path groupPath = this.getGroupPath(afilter);
+            List<Path> artifactPaths = this.getArtifactPaths(groupPath, afilter);
+            for (Path artifactPath : artifactPaths)
+                includePaths.addAll(this.getVersionPaths(artifactPath, afilter.getVersionRange()));
+        }
+
+        this.getLog().debug("May be purging all files in " + includePaths.size() + " paths");
+        String regexDirectorySeparator = String.valueOf(File.separatorChar);
+        if (File.separatorChar == '\\')
+            regexDirectorySeparator += "\\";
+
+        for (ArtifactFilter afilter : config.getExcludeArtifacts()) {
+            StringBuilder regex = new StringBuilder();
+            
+            if (afilter.getGroupId() != null) {
+                regex.append('^').append(this.getGroupPath(afilter));
+            } else if (afilter.getGroupIdRegex() != null) {
+                regex.append(afilter.getGroupIdRegex().replace("\\.", regexDirectorySeparator));
+                if (regex.charAt(0) != '^')
+                    regex.insert(0, '^');
+            } else {
+                regex.append("^.+");
+            }
+            
+            regex.append(regexDirectorySeparator);
+
+            if (afilter.getArtifactId() != null) {
+                regex.append(afilter.getArtifactId());
+            } else if (afilter.getArtifactIdRegex() != null) {
+                regex.append(afilter.getArtifactIdRegex());
+            } else {
+                regex.append("[^").append(regexDirectorySeparator).append("]+");
+            }
+            
+            Pattern pattern = Pattern.compile(regex.toString());
+            
+            Iterator<Path> i = includePaths.iterator();
+            while (i.hasNext()) {
+                Path path = i.next();
+                
+                Matcher matcher = pattern.matcher(path.toString());
+                if (!matcher.find())
+                    continue;
+                
+                // group/artifact match; now for version
+                if (afilter.getVersionRange() == null) {
+                    i.remove();
+                } else {
+                    String version = path.getFileName().toString();
+                    if (afilter.getVersionRange().containsVersion(new DefaultArtifactVersion(version)))
+                        i.remove();
+                }
+            }
+        }
+
+        Path repoPath = this.getRepositoryPath();
+        if (this.dryRun) {
+            this.getLog().info("DRYRUN: Would have deleted certain paths from local Maven cache: " + repoPath);
+            this.getLog().info("DRYRUN: Would have deleted these paths: " + includePaths);
+        } else {
+            for (Path path : includePaths) {
+                Path fullpath = repoPath.resolve(path);
+                if (Files.exists(fullpath)) {
+                    this.getLog().info("Deleting version from Maven cache: " + path);
+                    Files.walkFileTree(fullpath, new DeleteDirectoryVisitor());
+                } else {
+                    // this will probably never happen
+                    this.getLog().debug("Maven cache does not exist: " + path);
+                }
+            }
+        }
+	}
+    
+    private BanConfigurationParser getConfiguration(MavenProject project) throws MojoFailureException, IOException {
+        Plugin plugin = project.getPlugin(BanExtension.THIS_PLUGIN_KEY);
+        if (plugin == null)
+            throw new MojoFailureException("The plugin is executing but it cannot be found");
+        return new BanConfigurationParser(plugin);
+    }
+    
+    private Path getGroupPath(ArtifactFilter afilter) {
+        String[] pathElements = afilter.getGroupId().split("\\.");
+        Path groupPath = Paths.get("");
+        for (String pathElement : pathElements)
+            groupPath = groupPath.resolve(pathElement);
+        return groupPath;
+    }
+    
+    private List<Path> getArtifactPaths(Path groupPath, ArtifactFilter afilter) throws IOException {
+        if (afilter.getArtifactId() != null)
+            return Arrays.asList(groupPath.resolve(afilter.getArtifactId()));
+        
+        Pattern artifactPattern = afilter.getArtifactIdRegex() == null ? null : Pattern.compile(afilter.getArtifactIdRegex());
+        Path repoPath = this.getRepositoryPath();
+        List<Path> paths = new LinkedList<>();
+        
+        if (artifactPattern == null)
+            this.getLog().debug("All artifact directories in '" + groupPath + "' qualify as included");
+        
+        Files.list(repoPath.resolve(groupPath)).forEach(new Consumer<Path>() {
+            @Override
+            public void accept(Path t) {
+                if (artifactPattern == null) {
+                    paths.add(repoPath.relativize(t));
+                } else {
+                    Matcher matcher = artifactPattern.matcher(t.getFileName().toString());
+                    if (matcher.matches()) {
+                        getLog().debug("The artifact directory '" + t.getFileName() + "' qualifies as included");
+                        paths.add(repoPath.relativize(t));
+                    }
+                }
+            }
+        });
+        
+        return paths;
+    }
+    
+    private List<Path> getVersionPaths(Path artifactPath, VersionRange versionRange) throws IOException {
+        Path repoPath = this.getRepositoryPath();
+        List<Path> paths = new LinkedList<>();
+        
+        if (versionRange == null)
+            this.getLog().debug("All artifact version directories in '" + artifactPath + "' qualify as included");
+        
+        Files.list(repoPath.resolve(artifactPath)).forEach(new Consumer<Path>() {
+            @Override
+            public void accept(Path t) {
+                if (versionRange == null) {
+                    paths.add(repoPath.relativize(t));
+                } else {
+                    ArtifactVersion artifactVersion = new DefaultArtifactVersion(t.getFileName().toString());
+                    if (versionRange.containsVersion(artifactVersion)) {
+                        getLog().debug("The artifact version directory '" + t.getFileName() + "' qualifies as included");
+                        paths.add(repoPath.relativize(t));
+                    }
+                }
+            }
+        });
+        
+        return paths;
+    }
+    
+    private Path getRepositoryPath() {
+        return new File(this.session.getLocalRepository().getBasedir()).toPath();
+    }
+    
+    
+    
+    private class DeleteDirectoryVisitor implements FileVisitor<Path> {
+        
+        @Override
+        public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
+            return FileVisitResult.CONTINUE;
+        }
+        
+        @Override
+        public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+            Files.delete(file);
+            return FileVisitResult.CONTINUE;
+        }
+        
+        @Override
+        public FileVisitResult visitFileFailed(Path file, IOException exc) throws IOException {
+            return FileVisitResult.CONTINUE;
+        }
+        
+        @Override
+        public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
+            Files.delete(dir);
+            return FileVisitResult.CONTINUE;
+        }
+        
+    }
+    
+}