From: Nick Mathewson <nickm@torproject.org>
Date: Tue, 9 Jul 2013 16:54:39 +0000 (-0400)
Subject: Add a script to compare directories full of gcov output
X-Git-Tag: tor-0.2.5.1-alpha~122^2~2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=4753ad4f1dbd7fa3233ead5770e9c8bd619b8d07;p=thirdparty%2Ftor.git

Add a script to compare directories full of gcov output

We can't just use "diff", since we don't care about changes in line
numbers, or changes in the exact number of times a line was called.
We just care about changes that make lines covered or non-coverd.  So
pre-process the files before calling diff.
---

diff --git a/contrib/cov-diff b/contrib/cov-diff
new file mode 100755
index 0000000000..33a54802b6
--- /dev/null
+++ b/contrib/cov-diff
@@ -0,0 +1,17 @@
+#!/bin/sh
+# Copyright 2013  The Tor Project, Inc.
+# See LICENSE for licensing information.
+
+# cov-diff -- compare two directories full of gcov files.
+
+DIRA="$1"
+DIRB="$2"
+
+for A in $DIRA/*; do
+  B=$DIRB/`basename $A`
+  perl -pe 's/^\s*\d+:/        1:/; s/^([^:]+:)[\d\s]+:/$1/;' "$A" > "$A.tmp"
+  perl -pe 's/^\s*\d+:/        1:/; s/^([^:]+:)[\d\s]+:/$1/;' "$B" > "$B.tmp"
+  diff -u "$A.tmp" "$B.tmp"
+  rm "$A.tmp" "$B.tmp"
+done
+