Stop using Future.wait.

Author: davidmorgan

build_runner_core/lib/src/asset_graph/graph.dart

@@ -253,14 +253,12 @@ class AssetGraph implements GeneratedAssetHider {
     AssetReader digestReader,
   ) async {
     digestReader.cache.invalidate(ids);
-    await Future.wait(
-      ids.map((id) async {
-        final digest = await digestReader.digest(id);
-        updateNode(id, (nodeBuilder) {
-          nodeBuilder.digest = digest;
-        });
-      }),
-    );
+    for (final id in ids) {
+      final digest = await digestReader.digest(id);
+      updateNode(id, (nodeBuilder) {
+        nodeBuilder.digest = digest;
+      });
+    }
   }
 
   /// Changes [id] and its transitive`primaryOutput`s to `missingSource` nodes.

build_runner_core/lib/src/generate/asset_tracker.dart

@@ -108,17 +108,16 @@ class AssetTracker {
     var originalGraphSources = assetGraph.sources.toSet();
     var preExistingSources = originalGraphSources.intersection(inputSources)
       ..addAll(internalSources.where(assetGraph.contains));
-    var modifyChecks = preExistingSources.map((id) async {
+    for (final id in preExistingSources) {
       var node = assetGraph.get(id)!;
       var originalDigest = node.digest;
-      if (originalDigest == null) return;
+      if (originalDigest == null) continue;
       _reader.cache.invalidate([id]);
       var currentDigest = await _reader.digest(id);
       if (currentDigest != originalDigest) {
         updates[id] = ChangeType.MODIFY;
       }
-    });
-    await Future.wait(modifyChecks);
+    }
     return updates;
   }
 

build_runner_core/lib/src/generate/build.dart

@@ -561,15 +561,13 @@ class Build {
     PostBuildPhase phase,
   ) async {
     var actionNum = 0;
-    var outputLists = await Future.wait(
-      phase.builderActions.map(
-        (action) => _runPostBuildAction(phaseNum, actionNum++, action),
-      ),
-    );
-    return outputLists.fold<List<AssetId>>(
-      <AssetId>[],
-      (combined, next) => combined..addAll(next),
-    );
+    final result = <AssetId>[];
+    for (final builderAction in phase.builderActions) {
+      result.addAll(
+        await _runPostBuildAction(phaseNum, actionNum++, builderAction),
+      );
+    }
+    return result;
   }
 
   Future<Iterable<AssetId>> _runPostBuildAction(