Remove OTP26 support and add OTP29-rc (#15164)

* Update OTP compatibility table

* Add OTP 29.0 rc to CI, remove 26.0

* Remove :elxiir_json polyfill

* Remove :elixir_utils.jaro_similarity polyfill

* defdelegate directly to :proc_lib.set_label/2

Author: sabiwara

.github/workflows/ci.yml

@@ -26,6 +26,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
+          - otp_version: "29.0-rc1"
           - otp_version: "28.1"
             deterministic: true
           - otp_version: "28.1"
@@ -36,7 +37,6 @@ jobs:
             erlc_opts: "warnings_as_errors"
           - otp_version: "27.0"
             erlc_opts: "warnings_as_errors"
-          - otp_version: "26.0"
           - otp_version: master
             development: true
           - otp_version: maint
@@ -121,9 +121,9 @@ jobs:
     strategy:
       matrix:
         otp_version:
+          - "29.0-rc1"
           - "28.1"
           - "27.3"
-          - "26.2"
 
     steps:
       - name: Configure Git

.github/workflows/release.yml

@@ -71,16 +71,16 @@ jobs:
       fail-fast: true
       matrix:
         include:
-          - otp: 26
-            otp_version: "26.0"
-
           - otp: 27
             otp_version: "27.0"
 
           - otp: 28
             otp_version: "28.0"
             build_docs: build_docs
 
+          - otp: 29
+            otp_version: "29.0-rc1"
+
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
@@ -125,7 +125,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        otp: [26, 27, 28]
+        otp: [27, 28, 29]
         flavor: [windows, linux]
 
     env:

lib/elixir/lib/json.ex

@@ -67,7 +67,7 @@ defprotocol JSON.Encoder do
 
     {io, _prefix} =
       Enum.flat_map_reduce(kv, ?{, fn {field, value}, prefix ->
-        key = IO.iodata_to_binary([prefix, :elixir_json.encode_binary(Atom.to_string(field)), ?:])
+        key = IO.iodata_to_binary([prefix, :json.encode_binary(Atom.to_string(field)), ?:])
         {[key, quote(do: encoder.(unquote(value), encoder))], ?,}
       end)
 
@@ -130,25 +130,25 @@ end
 
 defimpl JSON.Encoder, for: BitString do
   def encode(value, _encoder) do
-    :elixir_json.encode_binary(value)
+    :json.encode_binary(value)
   end
 end
 
 defimpl JSON.Encoder, for: List do
   def encode(value, encoder) do
-    :elixir_json.encode_list(value, encoder)
+    :json.encode_list(value, encoder)
   end
 end
 
 defimpl JSON.Encoder, for: Integer do
   def encode(value, _encoder) do
-    :elixir_json.encode_integer(value)
+    :json.encode_integer(value)
   end
 end
 
 defimpl JSON.Encoder, for: Float do
   def encode(value, _encoder) do
-    :elixir_json.encode_float(value)
+    :json.encode_float(value)
   end
 end
 
@@ -408,7 +408,7 @@ defmodule JSON do
     decoders = Keyword.put_new(decoders, :null, nil)
 
     try do
-      :elixir_json.decode(binary, acc, Map.new(decoders))
+      :json.decode(binary, acc, Map.new(decoders))
     catch
       :error, :unexpected_end ->
         {:error, {:unexpected_end, byte_size(binary)}}
@@ -528,16 +528,16 @@ defmodule JSON do
   end
 
   def protocol_encode(value, _encoder) when is_binary(value),
-    do: :elixir_json.encode_binary(value)
+    do: :json.encode_binary(value)
 
   def protocol_encode(value, _encoder) when is_integer(value),
-    do: :elixir_json.encode_integer(value)
+    do: :json.encode_integer(value)
 
   def protocol_encode(value, _encoder) when is_float(value),
-    do: :elixir_json.encode_float(value)
+    do: :json.encode_float(value)
 
   def protocol_encode(value, encoder) when is_list(value),
-    do: :elixir_json.encode_list(value, encoder)
+    do: :json.encode_list(value, encoder)
 
   def protocol_encode(%{} = value, encoder) when not is_map_key(value, :__struct__),
     do: JSON.Encoder.Map.encode(value, encoder)

lib/elixir/lib/process.ex

@@ -997,12 +997,7 @@ defmodule Process do
   """
   @doc since: "1.17.0"
   @spec set_label(term()) :: :ok
-  def set_label(label) do
-    # TODO: switch to `:proc_lib.set_label/2` when we require Erlang/OTP 27+
-    Process.put(:"$process_label", label)
-    # mimic return value of `:proc_lib.set_label/2`
-    :ok
-  end
+  defdelegate set_label(label), to: :proc_lib
 
   @compile {:inline, nilify: 1}
   defp nilify(:undefined), do: nil

lib/elixir/lib/string.ex

@@ -3168,8 +3168,7 @@ defmodule String do
   def jaro_distance("", _string), do: 0.0
 
   def jaro_distance(string1, string2) when is_binary(string1) and is_binary(string2) do
-    # TODO: Replace by :string.jaro_similarity/2 when we require Erlang/OTP 27+
-    :elixir_utils.jaro_similarity(string1, string2)
+    :string.jaro_similarity(string1, string2)
   end
 
   @doc """

lib/elixir/pages/references/compatibility-and-deprecations.md

@@ -49,7 +49,7 @@ Erlang/OTP versioning is independent from the versioning of Elixir. Erlang relea
 
 Elixir version | Supported Erlang/OTP versions
 :------------- | :-------------------------------
-1.20           | 26 - 28
+1.20           | 27 - 29
 1.19           | 26 - 28
 1.18           | 25 - 27
 1.17           | 25 - 27