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-rwxr-xr-xtrim-lcov.py53
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+#!/usr/bin/python
+
+# This script removes branch and/or line coverage data for lines that
+# contain a particular substring.
+#
+# In the interest of "fairness" it removes all branch or coverage data
+# when a match is found -- not just negative data. It is therefore
+# likely that running this script will actually reduce the total number
+# of lines and branches that are marked as covered (in absolute terms).
+#
+# This script intentionally avoids checking for errors. Any exceptions
+# will trigger make to fail.
+#
+# Author: Ryan Lortie <desrt@desrt.ca>
+
+import sys
+
+line_suppress = ['g_assert_not_reached']
+branch_suppress = ['g_assert', 'g_return_if_fail', 'g_return_val_if_fail', 'G_DEFINE_TYPE']
+
+def check_suppress(suppressions, source, data):
+ line, _, rest = data.partition(',')
+ line = int(line) - 1
+
+ assert line < len(source)
+
+ for suppression in suppressions:
+ if suppression in source[line]:
+ return True
+
+ return False
+
+source = []
+for line in sys.stdin:
+ line = line[:-1]
+
+ keyword, _, rest = line.partition(':')
+
+ # Source file
+ if keyword == 'SF':
+ source = file(rest).readlines()
+
+ # Branch coverage data
+ elif keyword == 'BRDA':
+ if check_suppress(branch_suppress, source, rest):
+ continue
+
+ # Line coverage data
+ elif keyword == 'DA':
+ if check_suppress(line_suppress, source, rest):
+ continue
+
+ print line