mod_pottymouth

It can be difficultly installed with https://github.com/processone/ejabberd-contrib/tree/master/mod_pottymouth

Instructions

mkdir -p $EJABBERD_HOME/erlang-lib/bitarray
cd $EJABBERD_HOME/erlang-lib/bitarray
clone https://github.com/ferd/bitarray git repo
run: /usr/lib/erlang/bin/escript rebar get-deps
run: /usr/lib/erlang/bin/escript rebar compile
run: /usr/bin/install -c -d /usr/local/lib/bitarray-1.0.0/ebin
run: /usr/bin/install -c -d /usr/local/lib/bitarray-1.0.0/priv
run: /usr/bin/install -c -m 644 ./ebin/bitarray.app /usr/local/lib/bitarray-1.0.0/ebin/bitarray.app
run: /usr/bin/install -c -m 644 ./ebin/bitarray.beam /usr/local/lib/bitarray-1.0.0/ebin/bitarray.beam 
run: /usr/bin/install -c -m 644 ./priv/bitarray.so /usr/local/lib/bitarray-1.0.0/priv/bitarray.so

What is $EJABBERD_HOME? default may be ~/ folder.
So, export EJABBERD_HOME=/user/yourhome
in bittarray/rebar.conf, change proper version 1.0 -> 1.2

And Let's get mod_pottymouth

mkdir -n ~/.ejabberd-modules/sources
cd ~/.ejabberd-modules/sources
git clone https://github.com/processone/ejabberd-contrib.git
cd mod_pottymouth

make sure ejabberd is running
run: ejabberdctl module_install mod_pottymouth
run: ejabberdctl restart
module will be installed in: ~/.ejabberd-modules/mod_pottymouth

May be you cannot module_install mod_pottymouth

1. remove -include("ejabberd.hrl"). line of mod_pottymouth.erl

2. add this. end of mod_pottymouth.erl

mod_options(_) -> [{blacklists, []}, {charmaps, []}].

3. add this. end of mod_pottymouth.erl -export([ here]) 

mod_options/1

After this module_install mod_pottymouth will be work.

I created pull request about this. 
https://github.com/processone/ejabberd-contrib/pull/253