Bug 1445383 - update ccache stats parser for ccache 3.4 and 3.5 r=froydnj

MozReview-Commit-ID: KTr9RhkJN5B

--HG--
extra : rebase_source : b384a7e79f2e349a29942cf85f52aa306ddaa3c8

python/mozbuild/mozbuild/controller/building.py

@@ -757,6 +757,8 @@ class CCacheStats(object):
     STATS_KEYS = [
         # (key, description)
         # Refer to stats.c in ccache project for all the descriptions.
+        ('stats_zero_time', 'stats zero time'),
+        ('stats_updated', 'stats updated'),
         ('cache_hit_direct', 'cache hit (direct)'),
         ('cache_hit_preprocessed', 'cache hit (preprocessed)'),
         ('cache_hit_rate', 'cache hit rate'),
@@ -838,6 +840,13 @@ class CCacheStats(object):
 
     @staticmethod
     def _parse_value(raw_value):
+        try:
+            # ccache calls strftime with '%c' (src/stats.c)
+            ts = time.strptime(raw_value, '%c')
+            return int(time.mktime(ts))
+        except ValueError:
+            pass
+
         value = raw_value.split()
         unit = ''
         if len(value) == 1:

python/mozbuild/mozbuild/test/controller/test_ccachestats.py

@@ -4,6 +4,7 @@
 
 from __future__ import unicode_literals
 
+import time
 import unittest
 
 from mozunit import main
@@ -174,6 +175,30 @@ class TestCcacheStats(unittest.TestCase):
     max cache size                       5.0 GB
     """
 
+    # Substitute a locally-generated timestamp because the timestamp format is
+    # locale-dependent.
+    STAT8 = """
+    cache directory                     /home/psimonyi/.ccache
+    primary config                      /home/psimonyi/.ccache/ccache.conf
+    secondary config      (readonly)    /etc/ccache.conf
+    stats zero time                     {timestamp}
+    cache hit (direct)                   571
+    cache hit (preprocessed)            1203
+    cache miss                         11747
+    cache hit rate                     13.12 %
+    called for link                      623
+    called for preprocessing            7194
+    compile failed                        32
+    preprocessor error                   137
+    bad compiler arguments                 4
+    autoconf compile/link                348
+    no input file                        162
+    cleanups performed                    77
+    files in cache                     13464
+    cache size                           6.2 GB
+    max cache size                       7.0 GB
+    """.format(timestamp=time.strftime('%c'))
+
     def test_parse_garbage_stats_message(self):
         self.assertRaises(ValueError, CCacheStats, self.STAT_GARBAGE)
 
@@ -231,5 +256,10 @@ class TestCcacheStats(unittest.TestCase):
         stat7 = CCacheStats(self.STAT7)
         self.assertTrue(stat7)
 
+    def test_stats_version34(self):
+        # Test parsing 3.4 output.
+        stat8 = CCacheStats(self.STAT8)
+        self.assertTrue(stat8)
+
 if __name__ == '__main__':
     main()