Do not execute contribs.py for Python 2.6

doc/release/contribs.py

@@ -10,42 +10,46 @@
 
 tag = sys.argv[1]
 
-def call(cmd):
-    return subprocess.check_output(shlex.split(cmd), universal_newlines=True).split('\n')
+_python_version_str = '{0.major}.{0.minor}'.format(sys.version_info)
 
-tag_date = call("git show --format='%%ci' %s" % tag)[0]
-print("Release %s was on %s\n" % (tag, tag_date))
+if _python_version_str >= '2.7':
 
-merges = call("git log --since='%s' --merges --format='>>>%%B' --reverse" % tag_date)
-merges = [m for m in merges if m.strip()]
-merges = '\n'.join(merges).split('>>>')
-merges = [m.split('\n')[:2] for m in merges]
-merges = [m for m in merges if len(m) == 2 and m[1].strip()]
+    def call(cmd):
+        return subprocess.check_output(shlex.split(cmd), universal_newlines=True).split('\n')
 
-num_commits = call("git rev-list %s..HEAD --count" % tag)[0]
-print("A total of %s changes have been committed.\n" % num_commits)
+    tag_date = call("git show --format='%%ci' %s" % tag)[0]
+    print("Release %s was on %s\n" % (tag, tag_date))
 
-print("It contained the following %d merges:\n" % len(merges))
-for (merge, message) in merges:
-    if merge.startswith('Merge pull request #'):
-        PR = ' (%s)' % merge.split()[3]
-    else:
-        PR = ''
+    merges = call("git log --since='%s' --merges --format='>>>%%B' --reverse" % tag_date)
+    merges = [m for m in merges if m.strip()]
+    merges = '\n'.join(merges).split('>>>')
+    merges = [m.split('\n')[:2] for m in merges]
+    merges = [m for m in merges if len(m) == 2 and m[1].strip()]
 
-    print('- ' + message + PR)
+    num_commits = call("git rev-list %s..HEAD --count" % tag)[0]
+    print("A total of %s changes have been committed.\n" % num_commits)
 
+    print("It contained the following %d merges:\n" % len(merges))
+    for (merge, message) in merges:
+        if merge.startswith('Merge pull request #'):
+            PR = ' (%s)' % merge.split()[3]
+        else:
+            PR = ''
 
-print("\nMade by the following committers [alphabetical by last name]:\n")
+        print('- ' + message + PR)
 
-authors = call("git log --since='%s' --format=%%aN" % tag_date)
-authors = [a.strip() for a in authors if a.strip()]
 
-def key(author):
-    author = [v for v in author.split() if v[0] in string.ascii_letters]
-    if len(author) > 0:
-        return author[-1]
+    print("\nMade by the following committers [alphabetical by last name]:\n")
 
-authors = sorted(set(authors), key=key)
+    authors = call("git log --since='%s' --format=%%aN" % tag_date)
+    authors = [a.strip() for a in authors if a.strip()]
 
-for a in authors:
-    print('- ' + a)
+    def key(author):
+        author = [v for v in author.split() if v[0] in string.ascii_letters]
+        if len(author) > 0:
+            return author[-1]
+
+    authors = sorted(set(authors), key=key)
+
+    for a in authors:
+        print('- ' + a)