【发布时间】：2016-05-03 13:23:32
【问题描述】：
我正在使用Fitnesse Maven classpath plugin，它允许 Fitnesse 使用 Maven 存储库解析类路径。
该插件有效，但它似乎无法解析存储在我的远程存储库中的依赖项。
如果它在我的本地存储库中但不是远程的，它可以解析快照。
如果我运行 mvn install（从 Fitnesse 外部），那么查找依赖项没有问题，这表明我的 settings.xml 设置正确。
我已经调试了plugin，但很难准确指出它为什么无法解析远程快照。
问题：如何更改它以使其能够解析快照？
编辑：添加更多细节
这可以通过运行此单元测试轻松重现：MavenClasspathExtractorTest
此单元测试尝试解决 commons-lang 依赖关系。
如果您从本地存储库中删除此依赖项，则测试将失败，因为它似乎无法从远程存储库中检索。
如果你把它放回你的本地存储库，它会再次通过。
这是问题的症结所在。
可能的解决方案
以下是使用jcabi-aether 库的潜在解决方案，它首先使用本地存储库，如果没有，将从远程存储库下载。这看起来是万无一失的吗？它满足我的需求
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import org.apache.maven.model.Model;
import org.apache.maven.model.io.xpp3.MavenXpp3Reader;
import org.apache.maven.project.MavenProject;
import org.apache.maven.repository.RepositorySystem;
import org.apache.maven.settings.Profile;
import org.apache.maven.settings.Repository;
import org.apache.maven.settings.Settings;
import org.apache.maven.settings.building.*;
import org.codehaus.plexus.logging.Logger;
import org.codehaus.plexus.logging.console.ConsoleLoggerManager;
import org.sonatype.aether.artifact.Artifact;
import org.sonatype.aether.repository.RemoteRepository;
import org.sonatype.aether.util.artifact.DefaultArtifact;
import com.jcabi.aether.Aether;
/**
* Utility class to extract classpath elements from Maven projects. Heavily based on code copied from Jenkin's Maven
* support.
*/
public class MavenClasspathExtractor {
public static final String userHome = System.getProperty( "user.home" );
public static final File userMavenConfigurationHome = new File( userHome, ".m2" );
public static final String envM2Home = System.getenv("M2_HOME");
public final static String DEFAULT_SCOPE = "test";
public static final File DEFAULT_USER_SETTINGS_FILE = new File( userMavenConfigurationHome, "settings.xml" );
public static final File DEFAULT_GLOBAL_SETTINGS_FILE =
new File( System.getProperty( "maven.home", envM2Home != null ? envM2Home : "" ), "conf/settings.xml" );
private final Logger logger = new ConsoleLoggerManager().getLoggerForComponent("maven-classpath-plugin");
// Ensure M2_HOME variable is handled in a way similar to the mvn executable (script). To the extend possible.
static {
String m2Home = System.getenv().get("M2_HOME");
if (m2Home != null && System.getProperty("maven.home") == null) {
System.setProperty("maven.home", m2Home);
}
}
public List<String> extractClasspathEntries(File pomFile) throws MavenClasspathExtractionException {
return extractClasspathEntries(pomFile, DEFAULT_SCOPE);
}
public List<String> extractClasspathEntries(File pomFile, String scope) throws MavenClasspathExtractionException {
MavenXpp3Reader mavenReader;
FileReader reader = null;
try {
mavenReader = new MavenXpp3Reader();
reader = new FileReader(pomFile);
Model model = mavenReader.read(reader);
model.setPomFile(pomFile);
Collection<RemoteRepository> remoteRepositories = getRemoteRepositories();
File localRepo = new File( RepositorySystem.defaultUserLocalRepository.getAbsolutePath());
MavenProject project = new MavenProject(model);
Aether aether = new Aether(remoteRepositories, localRepo);
Artifact root = new DefaultArtifact(project.getGroupId(), project.getArtifactId(), project.getPackaging(), project.getVersion());
List<Artifact> artifacts = aether.resolve(root, scope);
List<String> paths = new ArrayList<>();
for(Artifact artifact : artifacts) {
paths.add(artifact.getFile().getAbsolutePath());
}
return paths;
} catch (Exception e) {
throw new MavenClasspathExtractionException(e);
} finally {
if(reader != null) {
try {
reader.close();
} catch (IOException e) {
throw new MavenClasspathExtractionException(e);
}
}
}
}
private Collection<RemoteRepository> getRemoteRepositories() throws SettingsBuildingException {
SettingsBuildingRequest settingsBuildingRequest = new DefaultSettingsBuildingRequest();
settingsBuildingRequest.setSystemProperties(System.getProperties());
settingsBuildingRequest.setUserSettingsFile(DEFAULT_USER_SETTINGS_FILE);
settingsBuildingRequest.setGlobalSettingsFile(DEFAULT_GLOBAL_SETTINGS_FILE);
DefaultSettingsBuilderFactory mvnSettingBuilderFactory = new DefaultSettingsBuilderFactory();
DefaultSettingsBuilder settingsBuilder = mvnSettingBuilderFactory.newInstance();
SettingsBuildingResult settingsBuildingResult = settingsBuilder.build(settingsBuildingRequest);
Settings effectiveSettings = settingsBuildingResult.getEffectiveSettings();
Map<String, Profile> profilesMap = effectiveSettings.getProfilesAsMap();
Collection<RemoteRepository> remotes = new ArrayList<RemoteRepository>(20);
for (String profileName : effectiveSettings.getActiveProfiles())
{
Profile profile = profilesMap.get(profileName);
List<Repository> repositories = profile.getRepositories();
for (Repository repo : repositories)
{
RemoteRepository remoteRepo
= new RemoteRepository(repo.getId(), "default", repo.getUrl());
remotes.add(remoteRepo);
}
}
return remotes;
}
}
【问题讨论】：
-
你能提供更多细节吗？最重要的是，您实际使用的
pom.xml文件（或要共享的相关/缩减部分）？ -
在上面添加了更多细节
标签： maven maven-3 dependency-management fitnesse