Address PR review comments

- Include buildConfiguration in initial property check to fix bug where
  buildConfiguration-only properties would be skipped
- Add isEmpty() checks for all property values before applying
- Add comment explaining break statement (only process first properties file)
- Add test for buildConfiguration-only scenario
- Add test for empty string values

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: runningcode

sentry/src/main/java/io/sentry/util/DebugMetaPropertiesApplier.java

@@ -99,28 +99,37 @@ private static void applyDistributionOptions(
       final @Nullable String orgAuthToken = getDistributionOrgAuthToken(properties);
       final @Nullable String buildConfiguration = getDistributionBuildConfiguration(properties);
 
-      if (orgSlug != null || projectSlug != null || orgAuthToken != null) {
+      if (orgSlug != null
+          || projectSlug != null
+          || orgAuthToken != null
+          || buildConfiguration != null) {
         final @NotNull SentryOptions.DistributionOptions distributionOptions =
             options.getDistribution();
 
-        if (orgSlug != null && distributionOptions.orgSlug.isEmpty()) {
+        if (orgSlug != null && !orgSlug.isEmpty() && distributionOptions.orgSlug.isEmpty()) {
           options.getLogger().log(SentryLevel.DEBUG, "Distribution org slug found: %s", orgSlug);
           distributionOptions.orgSlug = orgSlug;
         }
 
-        if (projectSlug != null && distributionOptions.projectSlug.isEmpty()) {
+        if (projectSlug != null
+            && !projectSlug.isEmpty()
+            && distributionOptions.projectSlug.isEmpty()) {
           options
               .getLogger()
               .log(SentryLevel.DEBUG, "Distribution project slug found: %s", projectSlug);
           distributionOptions.projectSlug = projectSlug;
         }
 
-        if (orgAuthToken != null && distributionOptions.orgAuthToken.isEmpty()) {
+        if (orgAuthToken != null
+            && !orgAuthToken.isEmpty()
+            && distributionOptions.orgAuthToken.isEmpty()) {
           options.getLogger().log(SentryLevel.DEBUG, "Distribution org auth token found");
           distributionOptions.orgAuthToken = orgAuthToken;
         }
 
-        if (buildConfiguration != null && distributionOptions.buildConfiguration == null) {
+        if (buildConfiguration != null
+            && !buildConfiguration.isEmpty()
+            && distributionOptions.buildConfiguration == null) {
           options
               .getLogger()
               .log(
@@ -130,6 +139,8 @@ private static void applyDistributionOptions(
           distributionOptions.buildConfiguration = buildConfiguration;
         }
 
+        // We only process the first properties file that contains distribution options
+        // to maintain consistency with other properties like proguardUuid
         break;
       }
     }

sentry/src/test/java/io/sentry/util/DebugMetaPropertiesApplierTest.kt

@@ -99,4 +99,35 @@ class DebugMetaPropertiesApplierTest {
     assertEquals(originalOrgSlug, options.distribution.orgSlug)
     assertEquals(originalProjectSlug, options.distribution.projectSlug)
   }
+
+  @Test
+  fun `applies buildConfiguration only when it is the only property set`() {
+    val properties = Properties()
+    properties.setProperty("io.sentry.distribution.build-configuration", "debug")
+
+    val options = SentryOptions()
+    DebugMetaPropertiesApplier.apply(options, listOf(properties))
+
+    assertEquals("debug", options.distribution.buildConfiguration)
+    assertEquals("", options.distribution.orgSlug)
+    assertEquals("", options.distribution.projectSlug)
+    assertEquals("", options.distribution.orgAuthToken)
+  }
+
+  @Test
+  fun `does not apply empty string values`() {
+    val properties = Properties()
+    properties.setProperty("io.sentry.distribution.org-slug", "")
+    properties.setProperty("io.sentry.distribution.project-slug", "")
+    properties.setProperty("io.sentry.distribution.org-auth-token", "")
+    properties.setProperty("io.sentry.distribution.build-configuration", "")
+
+    val options = SentryOptions()
+    DebugMetaPropertiesApplier.apply(options, listOf(properties))
+
+    assertEquals("", options.distribution.orgSlug)
+    assertEquals("", options.distribution.projectSlug)
+    assertEquals("", options.distribution.orgAuthToken)
+    assertNull(options.distribution.buildConfiguration)
+  }
 }