erlang_gen.snip

snippet     gen_server
options     head
        %%%-------------------------------------------------------------------
        %%% @author ${2:`g:author`}
        %%% @copyright (C) 2013 ${3}
        %%% @doc ${4}
        %%% @end
        %%%-------------------------------------------------------------------
        -module(${1}).
        -author('$2').

        -behaviour(gen_server).

        -export([start_link/0]).
        ${5}

        %% gen_server callbacks
        -export([init/1,
                 handle_call/3,
                 handle_cast/2,
                 handle_info/2,
                 terminate/2,
                 code_change/3]).

        -record(state, {}).

        %%%===================================================================
        %%% API
        %%%===================================================================

        start_link() ->
            gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).

        %%%===================================================================
        %%% gen_server callbacks
        %%%===================================================================

        init([]) ->
            {ok, #state{}}.

        handle_call(_Request, _From, State) ->
            {reply, ignored, State}.

        handle_cast(_Msg, State) ->
            {noreply, State}.

        handle_info(_Info, State) ->
            {noreply, State}.

        terminate(_Reason, _State) ->
            ok.

        code_change(_OldVsn, State, _Extra) ->
            {ok, State}.

        %%%===================================================================
        %%% Internal functions
        %%%===================================================================

snippet     gen_fsm
options     head
        %%%-------------------------------------------------------------------
        %%% @author ${2:`g:author`}
        %%% @copyright (C) 2013 ${3}
        %%% @doc ${4}
        %%% @end
        %%%-------------------------------------------------------------------
        -module(${1}).
        -author('$2').

        -behaviour(gen_fsm).

        %% API
        -export([start_link/0]).

        %% gen_fsm callbacks
        -export([init/1,
                 ${5:state_name}/2,
                 $5/3,
                 handle_event/3,
                 handle_sync_event/4,
                 handle_info/3,
                 terminate/3,
                 code_change/4]).
        ${6}

        -define(SERVER, ?MODULE).

        -record(state, {}).

        %%%===================================================================
        %%% API
        %%%===================================================================

        start_link() ->
                gen_fsm:start_link({local, ?SERVER}, ?MODULE, [], []).

        %%%===================================================================
        %%% gen_fsm callbacks
        %%%===================================================================

        init([]) ->
                {ok, $5, #state{}}.

        $5(_Event, State) ->
                {next_state, $5, State}.

        $5(_Event, _From, State) ->
                Reply = ok,
                {reply, Reply, $5, State}.

        handle_event(_Event, StateName, State) ->
                {next_state, StateName, State}.

        handle_sync_event(_Event, _From, StateName, State) ->
                Reply = ok,
                {reply, Reply, StateName, State}.

        handle_info(_Info, StateName, State) ->
                {next_state, StateName, State}.

        terminate(_Reason, _StateName, _State) ->
                ok.

        code_change(_OldVsn, StateName, State, _Extra) ->
                {ok, StateName, State}.

        %%%===================================================================
        %%% Internal functions
        %%%===================================================================

snippet     gen_event
options     head
        %%%-------------------------------------------------------------------
        %%% @author ${2:`g:author`}
        %%% @copyright (C) 2013 ${3}
        %%% @doc ${4}
        %%% @end
        %%%-------------------------------------------------------------------
        -module(${1}).
        -author('$2').

        -behaviour(gen_event).

        %% API
        -export([start_link/0, add_handler/0]).
        ${5}

        %% gen_event callbacks
        -export([init/1, handle_event/2, handle_call/2,
                         handle_info/2, terminate/2, code_change/3]).

        -define(SERVER, ?MODULE).

        -record(state, {}).

        %%%===================================================================
        %%% API
        %%%===================================================================

        %%%===================================================================
        %%% gen_event callbacks
        %%%===================================================================

        start_link() ->
                gen_event:start_link({local, ?SERVER}).

        add_handler() ->
                gen_event:add_handler(?SERVER, ?MODULE, []).

        %%%===================================================================
        %%% gen_event callbacks
        %%%===================================================================

        init([]) ->
                {ok, #state{}}.

        handle_event(_Event, State) ->
                {ok, State}.

        handle_call(_Request, State) ->
                Reply = ok,
                {ok, Reply, State}.

        handle_info(_Info, State) ->
                {ok, State}.

        terminate(_Reason, _State) ->
                ok.

        code_change(_OldVsn, State, _Extra) ->
                {ok, State}.

        %%%===================================================================
        %%% Internal functions
        %%%===================================================================

snippet     application
options     head
        %%%-------------------------------------------------------------------
        %%% @author ${2:`g:author`}
        %%% @copyright (C) 2013 ${3}
        %%% @doc ${4}
        %%% @end
        %%%-------------------------------------------------------------------
        -module(${1}).

        -behaviour(application).

        %% Application callbacks
        -export([start/2, stop/1]).

        %%%===================================================================
        %%% Application callbacks
        %%%===================================================================

        start(_StartType, _StartArgs) ->
                case 'TopSupervisor':start_link() of
                        {ok, Pid} ->
                                {ok, Pid};
                        Error ->
                                Error
                end.

        stop(_State) ->
                ok.

        %%%===================================================================
        %%% Internal functions
        %%%===================================================================

snippet     supervisor
options     head
        %%%-------------------------------------------------------------------
        %%% @author ${2:`g:author`}
        %%% @copyright (C) 2013 ${3}
        %%% @doc ${4}
        %%% @end
        %%%-------------------------------------------------------------------
        -module(${1}_sup).

        -behaviour(supervisor).

        %% API
        -export([start_link/0]).

        %% Supervisor callbacks
        -export([init/1]).

        %% Helper macro for declaring children of supervisor
        -define(CHILD(I, Type), 
                {I, {I, start_link, []}, permanent, 5000, Type, [I]}).

        %% ===================================================================
        %% API functions
        %% ===================================================================

        start_link() ->
            supervisor:start_link({local, ?MODULE}, ?MODULE, []).

        %% ===================================================================
        %% Supervisor callbacks
        %% ===================================================================

        init([]) ->
            {ok, { {one_for_one, 5, 10}, []} }.

snippet     ct
options     head

        %%%-------------------------------------------------------------------
        %%% @author ${2:`g:author`}
        %%% @copyright (C) 2013 ${3}
        %%% @doc ${4}
        %%% @end
        %%%-------------------------------------------------------------------
        -module(${1}_SUITE).
        -compile([export_all]).


        -include_lib("proper/include/proper.hrl").
        -include_lib("common_test/include/ct.hrl").

        -define(PROPTEST(M,F), true = proper:quickcheck(M:F())).

        all() ->
            [
             %% TODO: Group names here e.g. {group, crud}
            ].

        suite() ->
            [{ct_hooks,[cth_surefire]}, {timetrap, {seconds, 30}}].

        groups() ->
            [
                %% TODO: group definitions here e.g.
                %% {crud, [], [
                %%          t_create_resource,
                %%          t_read_resource,
                %%          t_update_resource,
                %%          t_delete_resource
                %%         ]}

            ].

        %%%===================================================================
        %%% Overall setup/teardown
        %%%===================================================================
        init_per_suite(Config) ->
            Config.

        end_per_suite(_Config) ->
            ok.


        %%%===================================================================
        %%% Group specific setup/teardown
        %%%===================================================================
        group(_Groupname) ->
            [].

        init_per_group(_Groupname, Config) ->
            Config.

        end_per_group(_Groupname, _Config) ->

            ok.


        %%%===================================================================
        %%% Testcase specific setup/teardown
        %%%===================================================================
        init_per_testcase(_TestCase, Config) ->
            Config.

        end_per_testcase(_TestCase, _Config) ->
            ok.

        %%%===================================================================
        %%% Individual Test Cases (from groups() definition)
        %%%===================================================================

Would it be possible to contribute these to upstream?

https://github.com/Shougo/neosnippet-snippets/

@rgrinberg yay for discovering this comment after a year 😿

go ahead if you feel like it, no attribution needed!