.globalToolchainsSource(
                        globalToolchainsPath != null && Files.exists(globalToolchainsPath)
                                ? Source.fromPath(globalToolchainsPath)
                                : null)
                .userToolchainsSource(
                        userToolchainsPath != null && Files.exists(userToolchainsPath)
                                ? Source.fromPath(userToolchainsPath)

        // No project, but most certainly a dependency which has been built previously
        File packagedArtifactFile = findInProjectLocalRepository(artifact);
        if (packagedArtifactFile != null && packagedArtifactFile.exists()) {
            return packagedArtifactFile;
        }

        return null;
    }

    public List<String> findVersions(Artifact artifact) {
        List<String> versions = getProjects()

        assertFalse(file.exists(), "Remote artifact " + file + " should not be present.");
    }

    protected void assertLocalArtifactNotPresent(Artifact artifact) throws Exception {
        ArtifactRepository localRepo = localRepository();

        String path = localRepo.pathOf(artifact);

        File file = new File(localRepo.getBasedir(), path);

            if (settingsFile != null) {
                activation.file(ActivationFile.newBuilder()
                        .exists(settingsFile.getExists())
                        .missing(settingsFile.getMissing())
                        .location("exists", toLocation(settingsFile.getLocation("exists")))
                        .location("missing", toLocation(settingsFile.getLocation("missing")))
                        .build());

                    // ignore
                }
                metadataFile.delete(); // if this fails, forget about it, we'll try to overwrite it anyway so no need
                // to delete on exit
            }
        } else if (metadataFile.exists()) {
            try (InputStream input = Files.newInputStream(metadataFile.toPath())) {
                metadata = new Metadata(new MetadataStaxReader().read(input, false));
            }
        }

        Map.Entry<Artifact, Path> res = session.resolveArtifact(coord);
        assertNotNull(res);
        assertNotNull(res.getValue());
        assertTrue(Files.exists(res.getValue()));

        Node node = session.collectDependencies(session.createDependencyCoordinate(coord));
        assertNotNull(node);
        assertEquals(8, node.getChildren().size());
    }

    }

    @Test
    void testRoundTripProfiles() {
        Random entropy = new Random();
        ActivationFile af = ActivationFile.newBuilder()
                .exists("exists" + Long.toHexString(entropy.nextLong()))
                .missing("missing" + Long.toHexString(entropy.nextLong()))
                .build();
        ActivationProperty ap = ActivationProperty.newBuilder()

  * If the wagon is bound to "file://" then:

    Retrieve the file or base-url file to be "downloaded".

    * If the file (or more usefully, the base-url file) exists, proceed.

    * If the file (or base-url file) doesn't exist, assume that this location
      is part of a file-share. Ignore the request and print a debug message
      as above.

** Control over mojos in the lifecycle

        String result;
        Path src = sourcePathProvider.get();
        if (src == null) {
            Files.deleteIfExists(target);
            result = null;
        } else if (!Files.exists(src)) {
            Files.deleteIfExists(target);
            result = "";
        } else {
            String current = sha1(src);
            String existing = sourceState.get();

                }
            }
        }
        return plugins.values();
    }

    private PluginInfo extractPluginInfo(Artifact artifact) {
        // sanity: jar, no classifier and file exists
        if (artifact != null
                && "jar".equals(artifact.getExtension())
                && "".equals(artifact.getClassifier())
                && artifact.getPath() != null) {