From a99a4dc99354a8439cb8f9d088d2a7946048b4c7 Mon Sep 17 00:00:00 2001
From: Mathew Robinson <chasinglogic@gmail.com>
Date: Fri, 18 Jan 2019 07:20:27 -0500
Subject: WIP: make stats reporting run after build

---
 SConstruct                                          | 15 +++++++++++++++
 .../scons-2.5.0/scons-local-2.5.0/SCons/Node/FS.py  | 21 +++++++++------------
 2 files changed, 24 insertions(+), 12 deletions(-)

diff --git a/SConstruct b/SConstruct
index 35c3ba191be..40043c5002c 100644
--- a/SConstruct
+++ b/SConstruct
@@ -3864,3 +3864,18 @@ env.Alias('cache-prune', cachePrune)
 # because SCons wants it to be a particular object.
 for i, s in enumerate(BUILD_TARGETS):
     BUILD_TARGETS[i] = env.subst(s)
+
+def print_cache_stats():
+    from SCons.Node.FS import cache_hits 
+    from SCons.Node.FS import cache_requests
+    if cache_requests == 0:
+        print('No cache requests were made.')
+        return
+
+    ratio = (float(cache_hits) / float(cache_requests)) * 100.0
+    print('Cache cache_hits: %d', cache_hits)
+    print('Cache cache_requests: %d', cache_requests)
+    print('Cache hit ratio: %d%%', ratio)
+
+import atexit
+atexit.register(print_cache_stats)
diff --git a/src/third_party/scons-2.5.0/scons-local-2.5.0/SCons/Node/FS.py b/src/third_party/scons-2.5.0/scons-local-2.5.0/SCons/Node/FS.py
index d71ded6549a..ab1bfa02588 100644
--- a/src/third_party/scons-2.5.0/scons-local-2.5.0/SCons/Node/FS.py
+++ b/src/third_party/scons-2.5.0/scons-local-2.5.0/SCons/Node/FS.py
@@ -2622,28 +2622,24 @@ class FileBuildInfo(SCons.Node.BuildInfoBase):
         return '\n'.join(result)
 
 
+cache_hits = 0
+cache_requests = 0
+
+
 def log_cache_rate(fn):
     """
     Logs the cache hit ratio.
     """
-    global requests
-    global hits
-    hits = 0
-    requests = 0
 
     def wrapper(self):
-        global requests
-        global hits
+        global cache_requests
+        global cache_hits
 
-        requests += 1
+        cache_requests += 1
         result = fn(self)
         if result:
-            hits += 1
-        ratio = (float(hits) / float(requests)) * 100.0
+            cache_hits += 1
 
-        print 'Cache hits: %d' % (hits)
-        print 'Cache requests: %d' % (requests)
-        print 'Cache hit ratio: %d%%' % (ratio)
         return result
 
     return wrapper
@@ -3009,6 +3005,7 @@ class File(Base):
             return None
         if not self.is_derived():
             return None
+        print 'Should have requested...'
         return self.get_build_env().get_CacheDir().retrieve(self)
 
     def visited(self):
-- 
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