1 files changed, 96 insertions, 0 deletions
diff --git a/tools/finalization/finalization-test/build_flags.rs b/tools/finalization/finalization-test/build_flags.rs
new file mode 100644
index 0000000000..816fd40879
--- /dev/null
+++ b/tools/finalization/finalization-test/build_flags.rs
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2025 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+use all_release_configs_proto::build_flags_out::{ReleaseConfigArtifact, ReleaseConfigsArtifact};
+use protobuf::Message;
+use std::collections::HashMap;
+use std::fs;
+
+#[allow(dead_code)]
+pub const FLAGS_WE_CARE_ABOUT: [&str; 5] = [
+    "RELEASE_PLATFORM_SDK_VERSION",
+    "RELEASE_PLATFORM_SDK_VERSION_FULL",
+    "RELEASE_PLATFORM_VERSION",
+    "RELEASE_PLATFORM_VERSION_CODENAME",
+    "RELEASE_HIDDEN_API_EXPORTABLE_STUBS",
+];
+
+// A map of release-config -name -> map of flag-name -> flag-value
+//
+// Example access:
+//
+//   assert_eq!(BUILD_FLAGS["trunk"]["RELEASE_PLATFORM_SDK_VERSION"], 36)
+#[allow(dead_code)]
+pub type BuildFlagMap = HashMap<String, HashMap<String, String>>;
+
+#[allow(dead_code)]
+pub struct ReleaseConfigs {
+    pub flags: BuildFlagMap,
+    pub next: String,
+}
+
+impl ReleaseConfigs {
+    #[allow(dead_code)]
+    pub fn init() -> Self {
+        let protobuf =
+            fs::read("all_release_configs.pb").expect("Could not read all_release_configs.pb");
+        let all_release_configs = ReleaseConfigsArtifact::parse_from_bytes(&protobuf[..])
+            .expect("failed to parse protobuf as ReleaseConfigArtifact");
+
+        let mut flags = HashMap::new();
+        let mut next: Option<String> = None;
+
+        // parse currently active release config
+        parse_release_config(&mut flags, &all_release_configs.release_config);
+
+        // parse the other release configs
+        for release_config in all_release_configs.other_release_configs {
+            parse_release_config(&mut flags, &release_config);
+            if release_config.other_names.contains(&"next".to_string()) {
+                assert!(next.is_none(), "next: multiple aliases");
+                next = Some(release_config.name().to_string());
+            }
+        }
+
+        ReleaseConfigs { flags, next: next.expect("next: missing alias") }
+    }
+}
+
+fn parse_release_config(build_flag_map: &mut BuildFlagMap, release_config: &ReleaseConfigArtifact) {
+    let x: HashMap<String, String> = release_config
+        .flags
+        .iter()
+        .filter(|flag| FLAGS_WE_CARE_ABOUT.contains(&flag.flag_declaration.name()))
+        .map(|flag| {
+            // Flag values are expected to be strings or bools, or not set. In this tool, we
+            // represent all types as strings (for simplicity).
+            let value = if flag.value.val.is_none() {
+                // value not set -> ""
+                String::new()
+            } else if flag.value.has_string_value() {
+                // already a string, use as is
+                flag.value.string_value().to_string()
+            } else if flag.value.has_bool_value() {
+                // convert bool to "true" or "false"
+                format!("{}", flag.value.bool_value())
+            } else {
+                panic!("unexpected protobuf value type: {:?}", flag.value);
+            };
+            (flag.flag_declaration.name().to_string(), value)
+        })
+        .collect();
+    build_flag_map.insert(release_config.name().to_string(), x);
+}