Remove unneeded dependency if OTP covers it

rebar.config

@@ -1,7 +1,5 @@
 {erl_opts, [debug_info]}.
 
-{deps, [
-        {jsone, "1.8.0"}
-       ]}.
+{deps, []}.
 
 {project_plugins, [rebar3_hex]}.

rebar.config.script

@@ -0,0 +1,13 @@
+{Deps0, Config0} = case lists:keytake(deps, 1, CONFIG) of
+                       false -> {[], CONFIG};
+                       {value, {deps, D}, Cfg} -> {D, Cfg}
+                   end,
+
+Deps = case list_to_integer(erlang:system_info(otp_release)) of
+           N when N >= 27 ->
+               Deps0;
+           _ ->
+               [{jsone, "1.8.0"} | Deps0]
+       end,
+
+[{deps, Deps} | Config0].

rebar.lock

@@ -1,8 +1 @@
-{"1.2.0",
-[{<<"jsone">>,{pkg,<<"jsone">>,<<"1.8.0">>},0}]}.
-[
-{pkg_hash,[
- {<<"jsone">>, <<"347FF1FA700E182E1F9C5012FA6D737B12C854313B9AE6954CA75D3987D6C06D">>}]},
-{pkg_hash_ext,[
- {<<"jsone">>, <<"08560B78624A12E0B5E7EC0271EC8CA38EF51F63D84D84843473E14D9B12618C">>}]}
-].
+[].

src/rebar3_codecov.app.src

@@ -4,8 +4,7 @@
   {registered, []},
   {applications,
    [kernel,
-    stdlib,
-    jsone
+    stdlib
    ]},
   {env,[]},
   {modules, []},

src/rebar3_codecov.app.src.script

@@ -0,0 +1,17 @@
+[{application, rebar3_codecov, Config}] = CONFIG,
+
+{Apps0, Config0} = case lists:keytake(applications, 1, Config) of
+                       false ->
+                           {[], CONFIG};
+                       {value, {applications, A}, Cfg} ->
+                           {A, Cfg}
+                   end,
+
+Apps = case list_to_integer(erlang:system_info(otp_release)) of
+           N when N >= 27 ->
+               Apps0;
+           _ ->
+               [jsone, rfc3339 | Apps0]
+       end,
+
+[{application, rebar3_codecov, [{applications, Apps} | Config]}].

src/rebar3_codecov_prv.erl

@@ -89,7 +89,7 @@ export_formats(State) ->
 to_json(SrcDirs, Mod2Data, #{json := true}) ->
     rebar_api:info("exporting ~s~n", [?JSON_OUT_FILE]),
     {_SrcDirs, JSON} = maps:fold(fun format_array_to_list/3, {SrcDirs, []}, Mod2Data),
-    Binary = jsone:encode(#{<<"coverage">> => {JSON}}),
+    Binary = json_encode(#{<<"coverage">> => {JSON}}),
     file:write_file(?JSON_OUT_FILE, Binary);
 to_json(_, _, _) -> ok.
 
@@ -196,3 +196,19 @@ get_excluded_modules(AppInfo) ->
                      end,
     rebar_api:info("Excluding modules from coverage report ~p~n", [ExcludeModules]),
     ExcludeModules.
+
+-ifdef(OTP_RELEASE).
+  -if(?OTP_RELEASE >= 27).
+  %% OTP 27 or higher
+json_encode(Bin) ->
+    json:encode(Bin).
+  -else.
+  %% OTP 26 to 21.
+json_encode(Bin) ->
+    jsone:encode(Bin).
+  -endif.
+-else.
+  %% OTP 20 or lower.
+json_encode(Bin) ->
+    jsone:encode(Bin).
+-endif.