find pom for .war and .ear files

Signed-off-by: Emily McMullan <[email protected]>

external-providers/java-external-provider/pkg/java_external_provider/dependency.go

@@ -120,6 +120,11 @@ func (p *javaServiceClient) GetDependencies(ctx context.Context) (map[uri.URI][]
 		ll = make(map[uri.URI][]konveyor.DepDAGItem, 0)
 		// for binaries we only find JARs embedded in archive
 		p.discoverDepsFromJars(p.config.DependencyPath, ll)
+		if len(ll) == 0 {
+			p.log.Info("unable to get dependencies from jars, looking for pom")
+			pomPath := p.discoverPom(p.config.DependencyPath, ll)
+			return p.GetDependenciesFallback(ctx, pomPath)
+		}
 	} else {
 		ll, err = p.GetDependenciesDAG(ctx)
 		if err != nil {
@@ -215,7 +220,7 @@ func (p *javaServiceClient) GetDependenciesFallback(ctx context.Context, locatio
 			artifactIdKey: *d.ArtifactID,
 			pomPathKey:    path,
 		}
-		if *d.Version != "" {
+		if d.Version != nil {
 			if strings.Contains(*d.Version, "$") {
 				version := strings.TrimSuffix(strings.TrimPrefix(*d.Version, "${"), "}")
 				p.log.V(10).Info("Searching for property in properties",
@@ -562,6 +567,7 @@ type walker struct {
 	m2RepoPath  string
 	initialPath string
 	seen        map[string]bool
+	pomPath     string
 }
 
 func (w *walker) walkDirForJar(path string, info fs.DirEntry, err error) error {
@@ -634,6 +640,34 @@ func (w *walker) walkDirForJar(path string, info fs.DirEntry, err error) error {
 	return nil
 }
 
+func (p *javaServiceClient) discoverPom(path string, ll map[uri.URI][]konveyor.DepDAGItem) string {
+	pathMeta := filepath.Join(path, "META-INF")
+	w := walker{
+		deps:        ll,
+		depToLabels: p.depToLabels,
+		m2RepoPath:  "",
+		seen:        map[string]bool{},
+		initialPath: pathMeta,
+		pomPath:     "",
+	}
+	filepath.WalkDir(pathMeta, w.walkDirForPom)
+	return w.pomPath
+}
+
+func (w *walker) walkDirForPom(path string, info fs.DirEntry, err error) error {
+	if info == nil {
+		return nil
+	}
+	if info.IsDir() {
+		return filepath.WalkDir(filepath.Join(path, info.Name()), w.walkDirForPom)
+	}
+	if strings.Contains(info.Name(), "pom.xml") {
+		w.pomPath = path
+		return nil
+	}
+	return nil
+}
+
 // parseDepString parses a java dependency string
 func (p *javaServiceClient) parseDepString(dep, localRepoPath, pomPath string) (provider.Dep, error) {
 	d := provider.Dep{}