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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.maven.bridge;
20  
21  import java.io.File;
22  import java.net.MalformedURLException;
23  import java.net.URL;
24  import java.util.ArrayList;
25  import java.util.Collection;
26  import java.util.Collections;
27  import java.util.HashSet;
28  import java.util.LinkedHashMap;
29  import java.util.List;
30  import java.util.Map;
31  import java.util.Set;
32  import javax.inject.Inject;
33  import javax.inject.Named;
34  import javax.inject.Singleton;
35  import org.apache.maven.RepositoryUtils;
36  import org.apache.maven.artifact.Artifact;
37  import org.apache.maven.artifact.DefaultArtifact;
38  import org.apache.maven.artifact.InvalidRepositoryException;
39  import org.apache.maven.artifact.handler.ArtifactHandler;
40  import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
41  import org.apache.maven.artifact.repository.ArtifactRepository;
42  import org.apache.maven.artifact.repository.ArtifactRepositoryPolicy;
43  import org.apache.maven.artifact.repository.Authentication;
44  import org.apache.maven.artifact.repository.MavenArtifactRepository;
45  import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout;
46  import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout2;
47  import org.apache.maven.artifact.repository.layout.DefaultRepositoryLayout;
48  import org.apache.maven.artifact.resolver.filter.ExclusionArtifactFilter;
49  import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException;
50  import org.apache.maven.artifact.versioning.VersionRange;
51  import org.apache.maven.execution.MavenExecutionRequest;
52  import org.apache.maven.model.Dependency;
53  import org.apache.maven.model.Plugin;
54  import org.apache.maven.repository.Proxy;
55  import org.apache.maven.repository.RepositorySystem;
56  import org.apache.maven.settings.Mirror;
57  import org.codehaus.plexus.util.StringUtils;
58  import org.eclipse.aether.RepositorySystemSession;
59  import org.eclipse.aether.repository.AuthenticationContext;
60  import org.eclipse.aether.repository.AuthenticationSelector;
61  import org.eclipse.aether.repository.ProxySelector;
62  import org.eclipse.aether.repository.RemoteRepository;
63  
64  /**
65   * @author Jason van Zyl
66   */
67  @Named("default")
68  @Singleton
69  public class MavenRepositorySystem {
70      private final ArtifactHandlerManager artifactHandlerManager;
71  
72      private final Map<String, ArtifactRepositoryLayout> layouts;
73  
74      @Inject
75      public MavenRepositorySystem(
76              ArtifactHandlerManager artifactHandlerManager, Map<String, ArtifactRepositoryLayout> layouts) {
77          this.artifactHandlerManager = artifactHandlerManager;
78          this.layouts = layouts;
79      }
80  
81      // DefaultProjectBuilder
82      public Artifact createArtifact(String groupId, String artifactId, String version, String scope, String type) {
83          return createArtifactX(groupId, artifactId, version, scope, type);
84      }
85  
86      // DefaultProjectBuilder
87      public Artifact createProjectArtifact(String groupId, String artifactId, String metaVersionId) {
88          return createProjectArtifactX(groupId, artifactId, metaVersionId);
89      }
90  
91      // DefaultProjectBuilder
92      public Artifact createDependencyArtifact(Dependency d) {
93          if (d.getVersion() == null) {
94              return null;
95          }
96  
97          VersionRange versionRange;
98          try {
99              versionRange = VersionRange.createFromVersionSpec(d.getVersion());
100         } catch (InvalidVersionSpecificationException e) {
101             return null;
102         }
103 
104         Artifact artifact = createDependencyArtifactX(
105                 d.getGroupId(),
106                 d.getArtifactId(),
107                 versionRange,
108                 d.getType(),
109                 d.getClassifier(),
110                 d.getScope(),
111                 d.isOptional());
112 
113         if (Artifact.SCOPE_SYSTEM.equals(d.getScope()) && d.getSystemPath() != null) {
114             artifact.setFile(new File(d.getSystemPath()));
115         }
116 
117         if (!d.getExclusions().isEmpty()) {
118             artifact.setDependencyFilter(new ExclusionArtifactFilter(d.getExclusions()));
119         }
120 
121         return artifact;
122     }
123 
124     // DefaultProjectBuilder
125     public Artifact createExtensionArtifact(String groupId, String artifactId, String version) {
126         VersionRange versionRange;
127         try {
128             versionRange = VersionRange.createFromVersionSpec(version);
129         } catch (InvalidVersionSpecificationException e) {
130             return null;
131         }
132 
133         return createExtensionArtifactX(groupId, artifactId, versionRange);
134     }
135 
136     // DefaultProjectBuilder
137     public Artifact createParentArtifact(String groupId, String artifactId, String version) {
138         return createParentArtifactX(groupId, artifactId, version);
139     }
140 
141     // DefaultProjectBuilder
142     public Artifact createPluginArtifact(Plugin plugin) {
143         VersionRange versionRange;
144         try {
145             String version = plugin.getVersion();
146             if (StringUtils.isEmpty(version)) {
147                 version = "RELEASE";
148             }
149             versionRange = VersionRange.createFromVersionSpec(version);
150         } catch (InvalidVersionSpecificationException e) {
151             return null;
152         }
153 
154         return createPluginArtifactX(plugin.getGroupId(), plugin.getArtifactId(), versionRange);
155     }
156 
157     public void injectMirror(List<ArtifactRepository> repositories, List<Mirror> mirrors) {
158         if (repositories != null && mirrors != null) {
159             for (ArtifactRepository repository : repositories) {
160                 Mirror mirror = getMirror(repository, mirrors);
161                 injectMirror(repository, mirror);
162             }
163         }
164     }
165 
166     private Mirror getMirror(RepositorySystemSession session, ArtifactRepository repository) {
167         if (session != null) {
168             org.eclipse.aether.repository.MirrorSelector selector = session.getMirrorSelector();
169             if (selector != null) {
170                 RemoteRepository repo = selector.getMirror(RepositoryUtils.toRepo(repository));
171                 if (repo != null) {
172                     Mirror mirror = new Mirror();
173                     mirror.setId(repo.getId());
174                     mirror.setUrl(repo.getUrl());
175                     mirror.setLayout(repo.getContentType());
176                     mirror.setBlocked(repo.isBlocked());
177                     return mirror;
178                 }
179             }
180         }
181         return null;
182     }
183 
184     public void injectMirror(RepositorySystemSession session, List<ArtifactRepository> repositories) {
185         if (repositories != null && session != null) {
186             for (ArtifactRepository repository : repositories) {
187                 Mirror mirror = getMirror(session, repository);
188                 injectMirror(repository, mirror);
189             }
190         }
191     }
192 
193     private void injectMirror(ArtifactRepository repository, Mirror mirror) {
194         if (mirror != null) {
195             ArtifactRepository original = createArtifactRepository(
196                     repository.getId(),
197                     repository.getUrl(),
198                     repository.getLayout(),
199                     repository.getSnapshots(),
200                     repository.getReleases());
201 
202             repository.setMirroredRepositories(Collections.singletonList(original));
203 
204             repository.setId(mirror.getId());
205             repository.setUrl(mirror.getUrl());
206 
207             if (StringUtils.isNotEmpty(mirror.getLayout())) {
208                 repository.setLayout(getLayout(mirror.getLayout()));
209             }
210 
211             repository.setBlocked(mirror.isBlocked());
212         }
213     }
214 
215     private Authentication getAuthentication(RepositorySystemSession session, ArtifactRepository repository) {
216         if (session != null) {
217             AuthenticationSelector selector = session.getAuthenticationSelector();
218             if (selector != null) {
219                 RemoteRepository repo = RepositoryUtils.toRepo(repository);
220                 org.eclipse.aether.repository.Authentication auth = selector.getAuthentication(repo);
221                 if (auth != null) {
222                     repo = new RemoteRepository.Builder(repo)
223                             .setAuthentication(auth)
224                             .build();
225                     AuthenticationContext authCtx = AuthenticationContext.forRepository(session, repo);
226                     Authentication result = new Authentication(
227                             authCtx.get(AuthenticationContext.USERNAME), authCtx.get(AuthenticationContext.PASSWORD));
228                     result.setPrivateKey(authCtx.get(AuthenticationContext.PRIVATE_KEY_PATH));
229                     result.setPassphrase(authCtx.get(AuthenticationContext.PRIVATE_KEY_PASSPHRASE));
230                     authCtx.close();
231                     return result;
232                 }
233             }
234         }
235         return null;
236     }
237 
238     public void injectAuthentication(RepositorySystemSession session, List<ArtifactRepository> repositories) {
239         if (repositories != null && session != null) {
240             for (ArtifactRepository repository : repositories) {
241                 repository.setAuthentication(getAuthentication(session, repository));
242             }
243         }
244     }
245 
246     private Proxy getProxy(RepositorySystemSession session, ArtifactRepository repository) {
247         if (session != null) {
248             ProxySelector selector = session.getProxySelector();
249             if (selector != null) {
250                 RemoteRepository repo = RepositoryUtils.toRepo(repository);
251                 org.eclipse.aether.repository.Proxy proxy = selector.getProxy(repo);
252                 if (proxy != null) {
253                     Proxy p = new Proxy();
254                     p.setHost(proxy.getHost());
255                     p.setProtocol(proxy.getType());
256                     p.setPort(proxy.getPort());
257                     if (proxy.getAuthentication() != null) {
258                         repo = new RemoteRepository.Builder(repo)
259                                 .setProxy(proxy)
260                                 .build();
261                         AuthenticationContext authCtx = AuthenticationContext.forProxy(session, repo);
262                         p.setUserName(authCtx.get(AuthenticationContext.USERNAME));
263                         p.setPassword(authCtx.get(AuthenticationContext.PASSWORD));
264                         p.setNtlmDomain(authCtx.get(AuthenticationContext.NTLM_DOMAIN));
265                         p.setNtlmHost(authCtx.get(AuthenticationContext.NTLM_WORKSTATION));
266                         authCtx.close();
267                     }
268                     return p;
269                 }
270             }
271         }
272         return null;
273     }
274 
275     public void injectProxy(RepositorySystemSession session, List<ArtifactRepository> repositories) {
276         if (repositories != null && session != null) {
277             for (ArtifactRepository repository : repositories) {
278                 repository.setProxy(getProxy(session, repository));
279             }
280         }
281     }
282 
283     private ArtifactRepositoryLayout getLayout(String id) {
284         return layouts.get(id);
285     }
286 
287     //
288     // Taken from LegacyRepositorySystem
289     //
290 
291     public static org.apache.maven.model.Repository fromSettingsRepository(
292             org.apache.maven.settings.Repository settingsRepository) {
293         org.apache.maven.model.Repository modelRepository = new org.apache.maven.model.Repository();
294         modelRepository.setId(settingsRepository.getId());
295         modelRepository.setLayout(settingsRepository.getLayout());
296         modelRepository.setName(settingsRepository.getName());
297         modelRepository.setUrl(settingsRepository.getUrl());
298         modelRepository.setReleases(fromSettingsRepositoryPolicy(settingsRepository.getReleases()));
299         modelRepository.setSnapshots(fromSettingsRepositoryPolicy(settingsRepository.getSnapshots()));
300         return modelRepository;
301     }
302 
303     public static org.apache.maven.model.RepositoryPolicy fromSettingsRepositoryPolicy(
304             org.apache.maven.settings.RepositoryPolicy settingsRepositoryPolicy) {
305         org.apache.maven.model.RepositoryPolicy modelRepositoryPolicy = new org.apache.maven.model.RepositoryPolicy();
306         if (settingsRepositoryPolicy != null) {
307             modelRepositoryPolicy.setEnabled(settingsRepositoryPolicy.isEnabled());
308             modelRepositoryPolicy.setUpdatePolicy(settingsRepositoryPolicy.getUpdatePolicy());
309             modelRepositoryPolicy.setChecksumPolicy(settingsRepositoryPolicy.getChecksumPolicy());
310         }
311         return modelRepositoryPolicy;
312     }
313 
314     public static ArtifactRepository buildArtifactRepository(org.apache.maven.settings.Repository repo)
315             throws InvalidRepositoryException {
316         return buildArtifactRepository(fromSettingsRepository(repo));
317     }
318 
319     public static ArtifactRepository buildArtifactRepository(org.apache.maven.model.Repository repo)
320             throws InvalidRepositoryException {
321         if (repo != null) {
322             String id = repo.getId();
323 
324             if (StringUtils.isEmpty(id)) {
325                 throw new InvalidRepositoryException("Repository identifier missing", "");
326             }
327 
328             String url = repo.getUrl();
329 
330             if (StringUtils.isEmpty(url)) {
331                 throw new InvalidRepositoryException("URL missing for repository " + id, id);
332             }
333 
334             ArtifactRepositoryPolicy snapshots = buildArtifactRepositoryPolicy(repo.getSnapshots());
335 
336             ArtifactRepositoryPolicy releases = buildArtifactRepositoryPolicy(repo.getReleases());
337 
338             ArtifactRepositoryLayout layout = new DefaultRepositoryLayout();
339 
340             return createArtifactRepository(id, url, layout, snapshots, releases);
341         } else {
342             return null;
343         }
344     }
345 
346     public static ArtifactRepositoryPolicy buildArtifactRepositoryPolicy(
347             org.apache.maven.model.RepositoryPolicy policy) {
348         boolean enabled = true;
349 
350         String updatePolicy = null;
351 
352         String checksumPolicy = null;
353 
354         if (policy != null) {
355             enabled = policy.isEnabled();
356 
357             if (policy.getUpdatePolicy() != null) {
358                 updatePolicy = policy.getUpdatePolicy();
359             }
360             if (policy.getChecksumPolicy() != null) {
361                 checksumPolicy = policy.getChecksumPolicy();
362             }
363         }
364 
365         return new ArtifactRepositoryPolicy(enabled, updatePolicy, checksumPolicy);
366     }
367 
368     public ArtifactRepository createArtifactRepository(
369             String id,
370             String url,
371             String layoutId,
372             ArtifactRepositoryPolicy snapshots,
373             ArtifactRepositoryPolicy releases)
374             throws Exception {
375         ArtifactRepositoryLayout layout = layouts.get(layoutId);
376 
377         checkLayout(id, layoutId, layout);
378 
379         return createArtifactRepository(id, url, layout, snapshots, releases);
380     }
381 
382     private void checkLayout(String repositoryId, String layoutId, ArtifactRepositoryLayout layout) throws Exception {
383         if (layout == null) {
384             throw new Exception(
385                     String.format("Cannot find ArtifactRepositoryLayout instance for: %s %s", layoutId, repositoryId));
386         }
387     }
388 
389     public static ArtifactRepository createArtifactRepository(
390             String id,
391             String url,
392             ArtifactRepositoryLayout repositoryLayout,
393             ArtifactRepositoryPolicy snapshots,
394             ArtifactRepositoryPolicy releases) {
395         if (snapshots == null) {
396             snapshots = new ArtifactRepositoryPolicy();
397         }
398 
399         if (releases == null) {
400             releases = new ArtifactRepositoryPolicy();
401         }
402 
403         ArtifactRepository repository;
404         if (repositoryLayout instanceof ArtifactRepositoryLayout2) {
405             repository = ((ArtifactRepositoryLayout2) repositoryLayout)
406                     .newMavenArtifactRepository(id, url, snapshots, releases);
407         } else {
408             repository = new MavenArtifactRepository(id, url, repositoryLayout, snapshots, releases);
409         }
410 
411         return repository;
412     }
413 
414     // ArtifactFactory
415     private Artifact createArtifactX(String groupId, String artifactId, String version, String scope, String type) {
416         return createArtifactX(groupId, artifactId, version, scope, type, null, null);
417     }
418 
419     private Artifact createDependencyArtifactX(
420             String groupId,
421             String artifactId,
422             VersionRange versionRange,
423             String type,
424             String classifier,
425             String scope,
426             boolean optional) {
427         return createArtifactX(groupId, artifactId, versionRange, type, classifier, scope, null, optional);
428     }
429 
430     private Artifact createProjectArtifactX(String groupId, String artifactId, String version) {
431         return createProjectArtifactX(groupId, artifactId, version, null);
432     }
433 
434     private Artifact createParentArtifactX(String groupId, String artifactId, String version) {
435         return createProjectArtifactX(groupId, artifactId, version);
436     }
437 
438     private Artifact createPluginArtifactX(String groupId, String artifactId, VersionRange versionRange) {
439         return createArtifactX(groupId, artifactId, versionRange, "maven-plugin", null, Artifact.SCOPE_RUNTIME, null);
440     }
441 
442     private Artifact createProjectArtifactX(String groupId, String artifactId, String version, String scope) {
443         return createArtifactX(groupId, artifactId, version, scope, "pom");
444     }
445 
446     private Artifact createExtensionArtifactX(String groupId, String artifactId, VersionRange versionRange) {
447         return createArtifactX(groupId, artifactId, versionRange, "jar", null, Artifact.SCOPE_RUNTIME, null);
448     }
449 
450     private Artifact createArtifactX(
451             String groupId,
452             String artifactId,
453             String version,
454             String scope,
455             String type,
456             String classifier,
457             String inheritedScope) {
458         VersionRange versionRange = null;
459         if (version != null) {
460             versionRange = VersionRange.createFromVersion(version);
461         }
462         return createArtifactX(groupId, artifactId, versionRange, type, classifier, scope, inheritedScope);
463     }
464 
465     private Artifact createArtifactX(
466             String groupId,
467             String artifactId,
468             VersionRange versionRange,
469             String type,
470             String classifier,
471             String scope,
472             String inheritedScope) {
473         return createArtifactX(groupId, artifactId, versionRange, type, classifier, scope, inheritedScope, false);
474     }
475 
476     @SuppressWarnings("checkstyle:parameternumber")
477     private Artifact createArtifactX(
478             String groupId,
479             String artifactId,
480             VersionRange versionRange,
481             String type,
482             String classifier,
483             String scope,
484             String inheritedScope,
485             boolean optional) {
486         String desiredScope = Artifact.SCOPE_RUNTIME;
487 
488         if (inheritedScope == null) {
489             desiredScope = scope;
490         } else if (Artifact.SCOPE_TEST.equals(scope) || Artifact.SCOPE_PROVIDED.equals(scope)) {
491             return null;
492         } else if (Artifact.SCOPE_COMPILE.equals(scope) && Artifact.SCOPE_COMPILE.equals(inheritedScope)) {
493             // added to retain compile artifactScope. Remove if you want compile inherited as runtime
494             desiredScope = Artifact.SCOPE_COMPILE;
495         }
496 
497         if (Artifact.SCOPE_TEST.equals(inheritedScope)) {
498             desiredScope = Artifact.SCOPE_TEST;
499         }
500 
501         if (Artifact.SCOPE_PROVIDED.equals(inheritedScope)) {
502             desiredScope = Artifact.SCOPE_PROVIDED;
503         }
504 
505         if (Artifact.SCOPE_SYSTEM.equals(scope)) {
506             // system scopes come through unchanged...
507             desiredScope = Artifact.SCOPE_SYSTEM;
508         }
509 
510         ArtifactHandler handler = artifactHandlerManager.getArtifactHandler(type);
511 
512         return new DefaultArtifact(
513                 groupId, artifactId, versionRange, desiredScope, type, classifier, handler, optional);
514     }
515 
516     //
517     // Code taken from LegacyRepositorySystem
518     //
519 
520     public ArtifactRepository createDefaultRemoteRepository(MavenExecutionRequest request) throws Exception {
521         return createRepository(
522                 RepositorySystem.DEFAULT_REMOTE_REPO_URL,
523                 RepositorySystem.DEFAULT_REMOTE_REPO_ID,
524                 true,
525                 ArtifactRepositoryPolicy.UPDATE_POLICY_DAILY,
526                 false,
527                 ArtifactRepositoryPolicy.UPDATE_POLICY_DAILY,
528                 ArtifactRepositoryPolicy.DEFAULT_CHECKSUM_POLICY);
529     }
530 
531     public ArtifactRepository createRepository(
532             String url,
533             String repositoryId,
534             boolean releases,
535             String releaseUpdates,
536             boolean snapshots,
537             String snapshotUpdates,
538             String checksumPolicy)
539             throws Exception {
540         ArtifactRepositoryPolicy snapshotsPolicy =
541                 new ArtifactRepositoryPolicy(snapshots, snapshotUpdates, checksumPolicy);
542 
543         ArtifactRepositoryPolicy releasesPolicy =
544                 new ArtifactRepositoryPolicy(releases, releaseUpdates, checksumPolicy);
545 
546         return createArtifactRepository(repositoryId, url, "default", snapshotsPolicy, releasesPolicy);
547     }
548 
549     public Set<String> getRepoIds(List<ArtifactRepository> repositories) {
550         Set<String> repoIds = new HashSet<>();
551 
552         if (repositories != null) {
553             for (ArtifactRepository repository : repositories) {
554                 repoIds.add(repository.getId());
555             }
556         }
557 
558         return repoIds;
559     }
560 
561     /**
562      * Source from org.apache.maven.repository.legacy.LegacyRepositorySystem#getEffectiveRepositories
563      *
564      * @param repositories a list of repositories
565      * @return corresponding effective repositories
566      * @since 3.6.1
567      */
568     public List<ArtifactRepository> getEffectiveRepositories(List<ArtifactRepository> repositories) {
569         if (repositories == null) {
570             return null;
571         }
572 
573         Map<String, List<ArtifactRepository>> reposByKey = new LinkedHashMap<>();
574 
575         for (ArtifactRepository repository : repositories) {
576             String key = repository.getId();
577 
578             List<ArtifactRepository> aliasedRepos = reposByKey.computeIfAbsent(key, k -> new ArrayList<>());
579 
580             aliasedRepos.add(repository);
581         }
582 
583         List<ArtifactRepository> effectiveRepositories = new ArrayList<>();
584 
585         for (List<ArtifactRepository> aliasedRepos : reposByKey.values()) {
586             List<ArtifactRepository> mirroredRepos = new ArrayList<>();
587 
588             List<ArtifactRepositoryPolicy> releasePolicies = new ArrayList<>(aliasedRepos.size());
589 
590             for (ArtifactRepository aliasedRepo : aliasedRepos) {
591                 releasePolicies.add(aliasedRepo.getReleases());
592                 mirroredRepos.addAll(aliasedRepo.getMirroredRepositories());
593             }
594 
595             ArtifactRepositoryPolicy releasePolicy = getEffectivePolicy(releasePolicies);
596 
597             List<ArtifactRepositoryPolicy> snapshotPolicies = new ArrayList<>(aliasedRepos.size());
598 
599             for (ArtifactRepository aliasedRepo : aliasedRepos) {
600                 snapshotPolicies.add(aliasedRepo.getSnapshots());
601             }
602 
603             ArtifactRepositoryPolicy snapshotPolicy = getEffectivePolicy(snapshotPolicies);
604 
605             ArtifactRepository aliasedRepo = aliasedRepos.get(0);
606 
607             ArtifactRepository effectiveRepository = createArtifactRepository(
608                     aliasedRepo.getId(), aliasedRepo.getUrl(), aliasedRepo.getLayout(), snapshotPolicy, releasePolicy);
609 
610             effectiveRepository.setAuthentication(aliasedRepo.getAuthentication());
611 
612             effectiveRepository.setProxy(aliasedRepo.getProxy());
613 
614             effectiveRepository.setMirroredRepositories(mirroredRepos);
615 
616             effectiveRepository.setBlocked(aliasedRepo.isBlocked());
617 
618             effectiveRepositories.add(effectiveRepository);
619         }
620 
621         return effectiveRepositories;
622     }
623 
624     private ArtifactRepositoryPolicy getEffectivePolicy(Collection<ArtifactRepositoryPolicy> policies) {
625         ArtifactRepositoryPolicy effectivePolicy = null;
626 
627         for (ArtifactRepositoryPolicy policy : policies) {
628             if (effectivePolicy == null) {
629                 effectivePolicy = new ArtifactRepositoryPolicy(policy);
630             } else {
631                 effectivePolicy.merge(policy);
632             }
633         }
634 
635         return effectivePolicy;
636     }
637 
638     public ArtifactRepository createLocalRepository(MavenExecutionRequest request, File localRepository)
639             throws Exception {
640         return createRepository(
641                 "file://" + localRepository.toURI().getRawPath(),
642                 RepositorySystem.DEFAULT_LOCAL_REPO_ID,
643                 true,
644                 ArtifactRepositoryPolicy.UPDATE_POLICY_ALWAYS,
645                 true,
646                 ArtifactRepositoryPolicy.UPDATE_POLICY_ALWAYS,
647                 ArtifactRepositoryPolicy.CHECKSUM_POLICY_IGNORE);
648     }
649 
650     private static final String WILDCARD = "*";
651 
652     private static final String EXTERNAL_WILDCARD = "external:*";
653 
654     private static final String EXTERNAL_HTTP_WILDCARD = "external:http:*";
655 
656     public static Mirror getMirror(ArtifactRepository repository, List<Mirror> mirrors) {
657         String repoId = repository.getId();
658 
659         if (repoId != null && mirrors != null) {
660             for (Mirror mirror : mirrors) {
661                 if (repoId.equals(mirror.getMirrorOf()) && matchesLayout(repository, mirror)) {
662                     return mirror;
663                 }
664             }
665 
666             for (Mirror mirror : mirrors) {
667                 if (matchPattern(repository, mirror.getMirrorOf()) && matchesLayout(repository, mirror)) {
668                     return mirror;
669                 }
670             }
671         }
672 
673         return null;
674     }
675 
676     /**
677      * This method checks if the pattern matches the originalRepository. Valid patterns:
678      * <ul>
679      * <li>{@code *} = everything,</li>
680      * <li>{@code external:*} = everything not on the localhost and not file based,</li>
681      * <li>{@code external:http:*} = any repository not on the localhost using HTTP,</li>
682      * <li>{@code repo,repo1} = {@code repo} or {@code repo1},</li>
683      * <li>{@code *,!repo1} = everything except {@code repo1}.</li>
684      * </ul>
685      *
686      * @param originalRepository to compare for a match.
687      * @param pattern used for match.
688      * @return true if the repository is a match to this pattern.
689      */
690     static boolean matchPattern(ArtifactRepository originalRepository, String pattern) {
691         boolean result = false;
692         String originalId = originalRepository.getId();
693 
694         // simple checks first to short circuit processing below.
695         if (WILDCARD.equals(pattern) || pattern.equals(originalId)) {
696             result = true;
697         } else {
698             // process the list
699             String[] repos = pattern.split(",");
700             for (String repo : repos) {
701                 // see if this is a negative match
702                 if (repo.length() > 1 && repo.startsWith("!")) {
703                     if (repo.substring(1).equals(originalId)) {
704                         // explicitly exclude. Set result and stop processing.
705                         result = false;
706                         break;
707                     }
708                 }
709                 // check for exact match
710                 else if (repo.equals(originalId)) {
711                     result = true;
712                     break;
713                 }
714                 // check for external:*
715                 else if (EXTERNAL_WILDCARD.equals(repo) && isExternalRepo(originalRepository)) {
716                     result = true;
717                     // don't stop processing in case a future segment explicitly excludes this repo
718                 }
719                 // check for external:http:*
720                 else if (EXTERNAL_HTTP_WILDCARD.equals(repo) && isExternalHttpRepo(originalRepository)) {
721                     result = true;
722                     // don't stop processing in case a future segment explicitly excludes this repo
723                 } else if (WILDCARD.equals(repo)) {
724                     result = true;
725                     // don't stop processing in case a future segment explicitly excludes this repo
726                 }
727             }
728         }
729         return result;
730     }
731 
732     /**
733      * Checks the URL to see if this repository refers to an external repository
734      *
735      * @param originalRepository
736      * @return true if external.
737      */
738     static boolean isExternalRepo(ArtifactRepository originalRepository) {
739         try {
740             URL url = new URL(originalRepository.getUrl());
741             return !(isLocal(url.getHost()) || url.getProtocol().equals("file"));
742         } catch (MalformedURLException e) {
743             // bad url just skip it here. It should have been validated already, but the wagon lookup will deal with it
744             return false;
745         }
746     }
747 
748     private static boolean isLocal(String host) {
749         return "localhost".equals(host) || "127.0.0.1".equals(host);
750     }
751 
752     /**
753      * Checks the URL to see if this repository refers to a non-localhost repository using HTTP.
754      *
755      * @param originalRepository
756      * @return true if external.
757      */
758     static boolean isExternalHttpRepo(ArtifactRepository originalRepository) {
759         try {
760             URL url = new URL(originalRepository.getUrl());
761             return ("http".equalsIgnoreCase(url.getProtocol())
762                             || "dav".equalsIgnoreCase(url.getProtocol())
763                             || "dav:http".equalsIgnoreCase(url.getProtocol())
764                             || "dav+http".equalsIgnoreCase(url.getProtocol()))
765                     && !isLocal(url.getHost());
766         } catch (MalformedURLException e) {
767             // bad url just skip it here. It should have been validated already, but the wagon lookup will deal with it
768             return false;
769         }
770     }
771 
772     static boolean matchesLayout(ArtifactRepository repository, Mirror mirror) {
773         return matchesLayout(RepositoryUtils.getLayout(repository), mirror.getMirrorOfLayouts());
774     }
775 
776     /**
777      * Checks whether the layouts configured for a mirror match with the layout of the repository.
778      *
779      * @param repoLayout The layout of the repository, may be {@code null}.
780      * @param mirrorLayout The layouts supported by the mirror, may be {@code null}.
781      * @return {@code true} if the layouts associated with the mirror match the layout of the original repository,
782      *         {@code false} otherwise.
783      */
784     static boolean matchesLayout(String repoLayout, String mirrorLayout) {
785         boolean result = false;
786 
787         // simple checks first to short circuit processing below.
788         if (StringUtils.isEmpty(mirrorLayout) || WILDCARD.equals(mirrorLayout)) {
789             result = true;
790         } else if (mirrorLayout.equals(repoLayout)) {
791             result = true;
792         } else {
793             // process the list
794             String[] layouts = mirrorLayout.split(",");
795             for (String layout : layouts) {
796                 // see if this is a negative match
797                 if (layout.length() > 1 && layout.startsWith("!")) {
798                     if (layout.substring(1).equals(repoLayout)) {
799                         // explicitly exclude. Set result and stop processing.
800                         result = false;
801                         break;
802                     }
803                 }
804                 // check for exact match
805                 else if (layout.equals(repoLayout)) {
806                     result = true;
807                     break;
808                 } else if (WILDCARD.equals(layout)) {
809                     result = true;
810                     // don't stop processing in case a future segment explicitly excludes this repo
811                 }
812             }
813         }
814 
815         return result;
816     }
817 }