tools: Add mkcontrib.py

Author: xlz

tools/mkcontrib.py

@@ -0,0 +1,26 @@
+# 1. Visual inspection: python mkcontrib.py
+# 2. If OK, python mkcontrib.py | grep -v ^# > CONTRIB
+
+from subprocess import Popen, PIPE
+from collections import defaultdict, Counter
+
+p = Popen(["git","log","--no-merges","--format=%aN <%aE>"], stdout=PIPE).stdout
+common_email = defaultdict(Counter)
+common_name = defaultdict(Counter)
+for line in p:
+    author, email = line.rstrip().split('<')
+    common_email[author].update([email])
+    common_name[email].update([author])
+
+for email in common_name:
+    names = common_name[email]
+    names = sorted(names, key=lambda x: (names[x], len(x)), reverse=True)
+    for name in names[1:]:
+        common_email[names[0]] += common_email[name]
+        del common_email[name]
+        print '# Less common or shorter name', name, 'is replaced by', names[0]
+
+for name in sorted(common_email):
+    for k in common_email[name].most_common()[1:]:
+        print '# Less common email <' + k[0] + ' is removed.'
+    print name + '<' + common_email[name].most_common(1)[0][0]