*/
    @Deprecated
    public MavenBuildTimestamp(Instant time, Properties properties) {
        this(time, properties != null ? properties.getProperty(BUILD_TIMESTAMP_FORMAT_PROPERTY) : null);
    }

    public MavenBuildTimestamp(Instant time, String timestampFormat) {
        if (timestampFormat == null) {
            timestampFormat = DEFAULT_BUILD_TIMESTAMP_FORMAT;
        }

        assertNotNull(result.getProblems());
        assertEquals(0, result.getProblems().size());
    }

    @Test
    void testBuildRequestWithUserToolchains() throws Exception {
        Properties props = new Properties();
        props.put("key", "user_value");
        ToolchainModel toolchain = new ToolchainModel();
        toolchain.setType("TYPE");
        toolchain.setProvides(props);

 * <tr><td><code>*</code></td>                 <td></td>               <td>user properties</td></tr>
 * <tr><td><code>*</code></td>                 <td></td>               <td>system properties</td></tr>
 * <tr><td><code>*</code></td>                 <td></td>               <td>project properties</td></tr>
 * </table>
 *
 * @see Session
 * @see Project
 * @see org.apache.maven.api.settings.Settings

                                    Map<String, String> properties = new HashMap<>();
                                    Properties env = OperatingSystemUtils.getSystemEnvVars();
                                    env.stringPropertyNames()
                                            .forEach(k -> properties.put("env." + k, env.getProperty(k)));
                                    return properties;

/**
 * Component able to contribute to Maven session user properties. This SPI component is invoked
 * very early, while there is no session created yet.
 *
 * @since 4.0.0
 */
@Experimental
@Consumer
public interface PropertyContributor extends SpiService {
    /**
     * Invoked just before session is created with a mutable map that carries collected user properties so far.
     *

    }

    @Override
    public Artifact setProperties(Map<String, String> properties) {
        Map<String, String> current = getProperties();
        if (current.equals(properties) || (properties == null && current.isEmpty())) {
            return this;
        }
        return new RelocatedArtifact(
                artifact.setProperties(properties), groupId, artifactId, classifier, extension, version, message);
    }

    }

    // ----------------------------------------------------------------------
    // Properties handling
    // ----------------------------------------------------------------------

    static void populateProperties(
            CommandLine commandLine, Properties paths, Properties systemProperties, Properties userProperties)
            throws Exception {
        EnvironmentUtils.addEnvVars(systemProperties);

 * under the License.
 */
package org.apache.maven.repository.internal.artifact;

/**
 * The keys for Maven specific properties of artifacts. These properties "extend" (or supplement) the Resolver
 * core properties defined in {@link org.eclipse.aether.artifact.ArtifactProperties}.
 *
 * @see org.eclipse.aether.artifact.ArtifactProperties
 * @since 4.0.0
 */

        Map<String, String> properties = new HashMap<>();
        properties.put(ArtifactProperties.TYPE, id);
        properties.put(ArtifactProperties.LANGUAGE, language.id());
        properties.put(MavenArtifactProperties.INCLUDES_DEPENDENCIES, Boolean.toString(includesDependencies));
        properties.put(
                MavenArtifactProperties.CONSTITUTES_BUILD_PATH,

    /**
     * Gets the system properties to use for interpolation and profile activation. The system properties are collected
     * from the runtime environment like {@link System#getProperties()} and environment variables.
     *
     * @return The execution properties, never {@code null}.
     */
    Map<String, String> getSystemProperties();

    /**