eavmlib: Remove json_encoder module

bettio · bettio · commit 7af7646c5bb8 · 2026-04-02T16:05:32.000+02:00
json_encoder was ancient code from 2018, that didn't even support maps,
since AtomVM has support for json official API, it was time to remove
it.

Signed-off-by: Davide Bettio &lt;davide@uninstall.it&gt;
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -34,6 +34,9 @@ strict format validation
 - Fixed `erlang:binary_to_float/1` and `erlang:list_to_float/1` returning `inf` for overflow instead
 of raising `badarg`
 
+### Removed
+- Removed old `json_encoder` module (now standard Erlang/OTP `json` module is available)
+
 ## [0.7.0-alpha.0] - 2026-03-20
 
 ### Added
diff --git a/UPDATING.md b/UPDATING.md
@@ -30,6 +30,8 @@ rather than copy sdkconfig.release-defaults.in to sdkconfig.defaults.in (which s
 `reconfigure` or `set-target` to be run to pick up the changes), this may also be combined with the
 `ATOMVM_ELIXIR_SUPPORT` option. For example, an Elixir-supported release build is configured using:
 `idf.py -DATOMVM_ELIXIR_SUPPORT=on -DATOMVM_RELEASE=on set-target ${CHIP}`
+- `json_encoder` module has been removed, use new (and standard) `json` module. New module uses
+standard Erlang/OTP API, that takes maps instead of proplists.
 
 ## v0.6.4 -> v0.6.5
 
diff --git a/examples/erlang/system_info_server.erl b/examples/erlang/system_info_server.erl
@@ -1,7 +1,7 @@
 %
 % This file is part of AtomVM.
 %
-% Copyright 2019-2020 Davide Bettio <davide@uninstall.it>
+% Copyright 2019-2026 Davide Bettio <davide@uninstall.it>
 %
 % Licensed under the Apache License, Version 2.0 (the "License");
 % you may not use this file except in compliance with the License.
@@ -62,18 +62,18 @@ handle_req("GET", [], Conn) ->
     Body = [<<"<html><body><h1>">>, TimeString, <<"</h1></body></html>">>],
     http_server:reply(200, Body, Conn);
 handle_req("GET", ["system", "info"], Conn) ->
-    SysInfo = [
-        {atom_count, erlang:system_info(atom_count)},
-        {process_count, erlang:system_info(process_count)},
-        {port_count, erlang:system_info(port_count)},
-        {word_size, erlang:system_info(wordsize)},
-        {system_architecture, erlang:system_info(system_architecture)}
-    ],
-    Body = json_encoder:encode(SysInfo),
+    SysInfo = #{
+        atom_count => erlang:system_info(atom_count),
+        process_count => erlang:system_info(process_count),
+        port_count => erlang:system_info(port_count),
+        word_size => erlang:system_info(wordsize),
+        system_architecture => erlang:system_info(system_architecture)
+    },
+    Body = json:encode(SysInfo),
     http_server:reply(200, Body, Conn);
 handle_req("GET", ["processes", PidString, "info"], Conn) ->
     {Code, ProcInfo} = try_proc_info_list(PidString),
-    Body = json_encoder:encode(ProcInfo),
+    Body = json:encode(ProcInfo),
     http_server:reply(Code, Body, Conn);
 handle_req(Method, Path, Conn) ->
     io:format("Method: ~p Path: ~p~n", [Method, Path]),
diff --git a/libs/eavmlib/src/CMakeLists.txt b/libs/eavmlib/src/CMakeLists.txt
@@ -28,7 +28,6 @@ set(ERLANG_MODULES
     console
     gpio_hal
     i2c_hal
-    json_encoder
     logger_manager
     port
     spi_hal
diff --git a/libs/eavmlib/src/json_encoder.erl b/libs/eavmlib/src/json_encoder.erl
