BM-2988: enable gcs feature by default

crates/boundless-market/src/storage/providers/gcs.rs

@@ -192,6 +192,14 @@ impl GcsStorageDownloader {
             builder = builder.with_endpoint(url);
         }
 
+        // If no Application Default Credentials are configured, fall back to
+        // anonymous credentials.
+        if env::var("GOOGLE_APPLICATION_CREDENTIALS").is_err() {
+            builder = builder.with_credentials(
+                google_cloud_auth::credentials::anonymous::Builder::new().build(),
+            );
+        }
+
         builder = if let Some(max_retries) = max_retries {
             builder.with_retry_policy(AlwaysRetry.with_attempt_limit(max_retries as u32))
         } else {

crates/broker/Cargo.toml

@@ -11,6 +11,8 @@ publish = false
 release = false
 
 [features]
+default = ["gcs"]
+gcs = ["boundless-market/gcs"]
 test-utils = ["dep:boundless-test-utils"]
 prove = ["blake3_groth16/prove"]
 cuda = ["blake3_groth16/cuda"]

crates/indexer/Cargo.toml

@@ -27,6 +27,8 @@ name = "market-indexer-backfill"
 path = "src/bin/market-indexer-backfill.rs"
 
 [features]
+default = ["gcs"]
+gcs = ["boundless-market/gcs"]
 # Enable this feature to run tests that require r0vm proving (slow without RISC0_DEV_MODE=1)
 test-r0vm = []
 # Enable this feature to run tests that require RPC URLs (ETH_MAINNET_RPC_URL, etc.)