fix: pin hocon 0.21.1

apps/emqx/rebar.config

@@ -17,7 +17,7 @@
     , {esockd, {git, "https://github.com/emqx/esockd", {tag, "5.9.0"}}}
     , {ekka, {git, "https://github.com/emqx/ekka", {tag, "0.11.1"}}}
     , {gen_rpc, {git, "https://github.com/emqx/gen_rpc", {tag, "2.5.1"}}}
-    , {hocon, {git, "https://github.com/emqx/hocon.git", {tag, "0.20.6"}}}
+    , {hocon, {git, "https://github.com/emqx/hocon.git", {tag, "0.22.0"}}}
     , {pbkdf2, {git, "https://github.com/emqx/erlang-pbkdf2.git", {tag, "2.0.4"}}}
     , {recon, {git, "https://github.com/ferd/recon", {tag, "2.5.1"}}}
     , {snabbkaffe, {git, "https://github.com/kafka4beam/snabbkaffe.git", {tag, "0.15.0"}}}

apps/emqx/src/emqx_config.erl

@@ -272,9 +272,15 @@ init_load(SchemaMod, RawConf) when is_map(RawConf) ->
     ok = save_schema_mod_and_names(SchemaMod),
     %% check and save configs
     {_AppEnvs, CheckedConf} = check_config(SchemaMod, RawConf),
+    %% fill default values for raw config
+    Opts = #{only_fill_defaults => true,
+             logger => fun(_, _) -> ok end, %% everything should have been logged already
+             nullable => true %% TODO: evil, remove, nullable should be declared in schema
+            },
+    RawConfWithDefaults = hocon_schema:check_plain(SchemaMod, RawConf, Opts),
     RootNames = get_root_names(),
     ok = save_to_config_map(maps:with(get_atom_root_names(), CheckedConf),
-                            maps:with(RootNames, RawConf)).
+                            maps:with(RootNames, RawConfWithDefaults)).
 
 include_dirs() ->
     [filename:join(emqx:data_dir(), "configs")].
@@ -283,7 +289,7 @@ include_dirs() ->
     when AppEnvs :: app_envs(), CheckedConf :: config().
 check_config(SchemaMod, RawConf) ->
     Opts = #{return_plain => true,
-             nullable => true,
+             nullable => true, %% TODO: evil, remove, nullable should be declared in schema
              format => map
             },
     {AppEnvs, CheckedConf} =

build

@@ -60,7 +60,7 @@ docgen() {
     conf_doc_markdown="$(pwd)/_build/${PROFILE}/rel/emqx/etc/emqx-config-doc.md"
     echo "===< Generating config document $conf_doc_markdown"
     # shellcheck disable=SC2086
-    erl -noshell -pa $libs_dir1 $libs_dir2 -eval "file:write_file('$conf_doc_markdown', hocon_schema_doc:gen(emqx_conf_schema)), halt(0)."
+    erl -noshell -pa $libs_dir1 $libs_dir2 -eval "file:write_file('$conf_doc_markdown', hocon_schema_doc:gen(emqx_conf_schema, \"EMQ X ${PKG_VSN} Configuration\")), halt(0)."
 }
 
 make_rel() {

rebar.config

@@ -64,7 +64,7 @@
     , {observer_cli, "1.7.1"} % NOTE: depends on recon 2.5.x
     , {getopt, "1.0.2"}
     , {snabbkaffe, {git, "https://github.com/kafka4beam/snabbkaffe.git", {tag, "0.15.0"}}}
-    , {hocon, {git, "https://github.com/emqx/hocon.git", {tag, "0.20.6"}}}
+    , {hocon, {git, "https://github.com/emqx/hocon.git", {tag, "0.22.0"}}}
     , {emqx_http_lib, {git, "https://github.com/emqx/emqx_http_lib.git", {tag, "0.4.1"}}}
     , {esasl, {git, "https://github.com/emqx/esasl", {tag, "0.2.0"}}}
     , {jose, {git, "https://github.com/potatosalad/erlang-jose", {tag, "1.11.1"}}}