emqx4.3/src/emqx.app.src.script

%%-*- mode: erlang -*-
%% .app.src.script

Config = case os:getenv("EMQX_DESC") of
	false -> CONFIG; % env var not defined
	[]    -> CONFIG; % env var set to empty string
	Desc ->
		[begin
			AppConf0 = lists:keystore(description, 1, AppConf, {description, Desc}),
			{application, App, AppConf0}
		end || Conf = {application, App, AppConf} <- CONFIG]
end,

RemoveLeadingV =
    fun(Tag) ->
        case re:run(Tag, "^[v|e]?[0-9]\.[0-9]\.([0-9]|(rc|beta|alpha)\.[0-9])", [{capture, none}]) of
            nomatch ->
                re:replace(Tag, "/", "-", [{return ,list}]);
            _ ->
                %% if it is a version number prefixed by 'v' or 'e', then remove it
                re:replace(Tag, "[v|e]", "", [{return ,list}])
        end
    end,

case os:getenv("EMQX_DEPS_DEFAULT_VSN") of
	false -> Config; % env var not defined
	[]    -> Config; % env var set to empty string
	Tag ->
		[begin
			AppConf0 = lists:keystore(vsn, 1, AppConf, {vsn, RemoveLeadingV(Tag)}),
			{application, App, AppConf0}
		end || Conf = {application, App, AppConf} <- Config]
end.