1 files changed, 19 insertions, 0 deletions
diff --git a/src/ninja.cc b/src/ninja.cc
index 839e9e6..ce1beda 100644
--- a/src/ninja.cc
+++ b/src/ninja.cc
@@ -153,6 +153,10 @@ struct NinjaMain : public BuildLogUser {
   /// @return true if the manifest was rebuilt.
   bool RebuildManifest(const char* input_file, string* err, Status* status);
 
+  /// For each edge, lookup in build log how long it took last time,
+  /// and record that in the edge itself. It will be used for ETA predicton.
+  void ParsePreviousElapsedTimes();
+
   /// Build the targets listed on the command line.
   /// @return an exit code.
   int RunBuild(int argc, char** argv, Status* status);
@@ -286,6 +290,19 @@ bool NinjaMain::RebuildManifest(const char* input_file, string* err,
   return true;
 }
 
+void NinjaMain::ParsePreviousElapsedTimes() {
+  for (Edge* edge : state_.edges_) {
+    for (Node* out : edge->outputs_) {
+      BuildLog::LogEntry* log_entry = build_log_.LookupByOutput(out->path());
+      if (!log_entry)
+        continue;  // Maybe we'll have log entry for next output of this edge?
+      edge->prev_elapsed_time_millis =
+          log_entry->end_time - log_entry->start_time;
+      break;  // Onto next edge.
+    }
+  }
+}
+
 Node* NinjaMain::CollectTarget(const char* cpath, string* err) {
   string path = cpath;
   if (path.empty()) {
@@ -1586,6 +1603,8 @@ NORETURN void real_main(int argc, char** argv) {
       exit(1);
     }
 
+    ninja.ParsePreviousElapsedTimes();
+
     int result = ninja.RunBuild(argc, argv, status);
     if (g_metrics)
       ninja.DumpMetrics();