fix(java): use true as default value for Repository Release|Snapshot Enabled in pom.xml and settings.xml files (#9751)

pkg/dependency/parser/java/pom/repository.go

@@ -31,8 +31,10 @@ func resolvePomRepos(servers []Server, pomRepos []pomRepository) []repository {
 	var repos []repository
 	for _, rep := range pomRepos {
 		r := repository{
-			releaseEnabled:  rep.ReleasesEnabled == "true",
-			snapshotEnabled: rep.SnapshotsEnabled == "true",
+			// "<enabled>: true or false for whether this repository is enabled for the respective type (releases or snapshots). By default, this is true."
+			// cf. https://maven.apache.org/pom.html#Repositories
+			releaseEnabled:  rep.ReleasesEnabled == "true" || rep.ReleasesEnabled == "",
+			snapshotEnabled: rep.SnapshotsEnabled == "true" || rep.SnapshotsEnabled == "",
 		}
 
 		// Add only enabled repositories

pkg/dependency/parser/java/pom/settings_test.go

@@ -43,7 +43,7 @@ func Test_ReadSettings(t *testing.T) {
 							{
 								ID:               "mycompany-internal-releases",
 								URL:              "https://mycompany.example.com/repository/internal-releases",
-								ReleasesEnabled:  "true",
+								ReleasesEnabled:  "",
 								SnapshotsEnabled: "false",
 							},
 							{
@@ -342,16 +342,16 @@ func Test_effectiveRepositories(t *testing.T) {
 						ID: "p1",
 						Repositories: []pomRepository{
 							{
-								ID:               "r1",
-								URL:              "https://example.com/repo1",
-								ReleasesEnabled:  "true",
+								ID:  "r1",
+								URL: "https://example.com/repo1",
+								// ReleasesEnabled:  "true", Release field is not explicitly set.
 								SnapshotsEnabled: "false",
 							},
 							{
-								ID:               "r2",
-								URL:              "https://example.com/repo2",
-								ReleasesEnabled:  "false",
-								SnapshotsEnabled: "true",
+								ID:              "r2",
+								URL:             "https://example.com/repo2",
+								ReleasesEnabled: "invalid", // invalid value treated as false
+								// SnapshotsEnabled: "true", Snapshot field is not explicitly set.
 							},
 						},
 					},

pkg/dependency/parser/java/pom/testdata/settings/global/conf/settings.xml

@@ -25,9 +25,6 @@
                 <repository>
                     <id>mycompany-internal-releases</id>
                     <url>https://mycompany.example.com/repository/internal-releases</url>
-                    <releases>
-                        <enabled>true</enabled>
-                    </releases>
                     <snapshots>
                         <enabled>false</enabled>
                     </snapshots>