add yapf style

bootstrap

@@ -21,8 +21,19 @@ else
     echo "Uncrustify not detected, hook not installed. Please install uncrustify if you plan on doing development"
 fi
 
-echo "checking for libtoolize / libtool... "
 
+# yapf can be a suffixed binary, don't change the essential logic
+# of this if you change it.
+if existence yapf || existence yapf3.0 || existence yapf3.1 || existence yapf3.2 || existence yapf3.3 || existence yapf3.4 || existence yapf3.5 || existence yapf3.6 || existence yapf3.7 || existence yapf3.8 || existence yapf3.9 || existence yapf4.0; then
+    echo "Installing yapf symlink"
+    # Install yapf style symlink (if possible)
+    ln -s contrib/conf/.style.yapf 2> /dev/null
+else
+    echo "yapf not detected, please install yapf if you plan on contributing python code"
+fi
+
+
+echo "checking for libtoolize / libtool... "
 
 if existence libtool || existence libtoolize || existence glibtoolize || existence slibtool; then
     autoreconf -if

contrib/Makefile.am

@@ -19,6 +19,7 @@ INITD_FILES = \
 
 EXTRA_DIST = \
  conf/colorit/colorit.conf \
+ conf/.style.yapf \
  conf/editors/eclipse/gnunet_codingstyle.xml \
  conf/gnunet/no_forcestart.conf \
  conf/gnunet/no_autostart_above_core.conf \

contrib/conf/.style.yapf

@@ -0,0 +1,5 @@
+[style]
+based_on_style = pep8
+coalesce_brackets=True
+column_limit=80
+dedent_closing_brackets=True