Add more OTP and Elixir versions to CI

.github/workflows/ci.yml

@@ -13,10 +13,6 @@ name: CI
   workflow_dispatch: {}
   merge_group:
 
-# Sets the ENV `MIX_ENV` to `test` for running tests
-env:
-  MIX_ENV: test
-
 permissions:
   contents: read
 
@@ -28,13 +24,26 @@ jobs:
   ci:
     name: CI OTP-${{matrix.otp-version}} / Elixir ${{matrix.elixir-version}}
 
-    runs-on: ${{matrix.os}}
+    runs-on: ubuntu-24.04
 
     strategy:
       matrix:
-        otp-version: [27]
-        elixir-version: ['1.17.2']
-        os: [ubuntu-24.04]
+        include:
+          - otp-version: "24.3"
+            elixir-version: "1.12"
+          - otp-version: "24.3"
+            elixir-version: "1.13"
+          - otp-version: "25.3"
+            elixir-version: "1.14"
+          - otp-version: "26.2"
+            elixir-version: "1.15"
+          - otp-version: "26.2"
+            elixir-version: "1.16"
+          - otp-version: "27.0"
+            elixir-version: "1.17"
+
+    env:
+      MIX_ENV: ${{fromJSON(matrix.otp-version) < 27 && 'polyfill' || 'test'}}
 
     steps:
       # Step: Setup Elixir + Erlang image as the base.
@@ -54,12 +63,13 @@ jobs:
         id: cache-deps
         uses: actions/cache@v4
         env:
-          cache-name: cache-elixir-deps
+          CACHE_NAME: cache-elixir-deps
         with:
           path: deps
-          key: ${{runner.os}}-mix-${{env.cache-name}}-${{hashFiles('**/mix.lock')}}
+          key: |
+            ${{runner.os}}-otp-${{matrix.otp-version}}-mix-${{env.CACHE_NAME}}-${{hashFiles('**/mix.lock')}}
           restore-keys: |
-            ${{runner.os}}-mix-${{env.cache-name}}-
+            ${{runner.os}}-otp-${{matrix.otp-version}}-mix-${{env.CACHE_NAME}}-
 
       # Step: Define how to cache the `_build` directory. After the first run,
       # this speeds up tests runs a lot. This includes not re-compiling our
@@ -68,13 +78,13 @@ jobs:
         id: cache-build
         uses: actions/cache@v4
         env:
-          cache-name: cache-compiled-build
+          CACHE_NAME: cache-compiled-build
         with:
           path: _build
-          key: ${{runner.os}}-mix-${{env.cache-name}}-${{hashFiles('**/mix.lock')}}
+          key: |
+            ${{runner.os}}-otp-${{matrix.otp-version}}-mix-${{env.CACHE_NAME}}-${{hashFiles('**/mix.lock')}}
           restore-keys: |
-            ${{runner.os}}-mix-${{env.cache-name}}-
-            ${{runner.os}}-mix-
+            ${{runner.os}}-otp-${{matrix.otp-version}}-mix-${{env.CACHE_NAME}}-
 
       # Step: Download project dependencies. If unchanged, uses the cached version.
       - name: Install dependencies
@@ -94,9 +104,3 @@ jobs:
       # Step: Execute the tests.
       - name: Run tests
         run: mix test
-
-      - name: Check if build left artifacts
-        run: |
-          mix deps.clean --all
-          mix deps.update --all
-          git diff --exit-code

lib/exneus.ex

@@ -104,7 +104,11 @@ defmodule Exneus do
           ...>       foo: {[:bar, :baz], 3}
           ...>   }}]}
           ...> )
-          "{\"bar\":\"bar\",\"baz\":\"baz\"}"
+          if String.to_integer(System.otp_release) >= 26 do
+            "{\"bar\":\"bar\",\"baz\":\"baz\"}"
+          else
+            "{\"baz\":\"baz\",\"bar\":\"bar\"}"
+          end
 
     Custom codec example:
 

mix.exs

@@ -5,7 +5,7 @@ defmodule Exneus.MixProject do
     [
       app: :exneus,
       version: "0.1.0",
-      elixir: "~> 1.17",
+      elixir: "~> 1.12",
       start_permanent: Mix.env() == :prod,
       aliases: aliases(),
       preferred_cli_env: [
@@ -52,6 +52,7 @@ defmodule Exneus.MixProject do
   # Run "mix help deps" to learn about dependencies.
   defp deps do
     [
+      {:json_polyfill, only: :polyfill, runtime: false},
       {:euneus, git: "https://github.com/williamthome/euneus", branch: "main"},
       # dev
       {:dialyxir, "~> 1.4", only: [:dev, :test], runtime: false},

mix.lock

@@ -7,7 +7,7 @@
   "dialyxir": {:hex, :dialyxir, "1.4.3", "edd0124f358f0b9e95bfe53a9fcf806d615d8f838e2202a9f430d59566b6b53b", [:mix], [{:erlex, ">= 0.2.6", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "bf2cfb75cd5c5006bec30141b131663299c661a864ec7fbbc72dfa557487a986"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.41", "ab34711c9dc6212dda44fcd20ecb87ac3f3fce6f0ca2f28d4a00e4154f8cd599", [:mix], [], "hexpm", "a81a04c7e34b6617c2792e291b5a2e57ab316365c2644ddc553bb9ed863ebefa"},
   "erlex": {:hex, :erlex, "0.2.7", "810e8725f96ab74d17aac676e748627a07bc87eb950d2b83acd29dc047a30595", [:mix], [], "hexpm", "3ed95f79d1a844c3f6bf0cea61e0d5612a42ce56da9c03f01df538685365efb0"},
-  "euneus": {:git, "https://github.com/williamthome/euneus", "0933a9c6ab20f4773a2f794c0f915a659fcb7027", [branch: "main"]},
+  "euneus": {:git, "https://github.com/williamthome/euneus", "e089bb9e9d64dbab098d64c277b051da17d2b04b", [branch: "main"]},
   "ex_doc": {:hex, :ex_doc, "0.34.2", "13eedf3844ccdce25cfd837b99bea9ad92c4e511233199440488d217c92571e8", [:mix], [{:earmark_parser, "~> 1.4.39", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_c, ">= 0.1.0", [hex: :makeup_c, repo: "hexpm", optional: true]}, {:makeup_elixir, "~> 0.14 or ~> 1.0", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1 or ~> 1.0", [hex: :makeup_erlang, repo: "hexpm", optional: false]}, {:makeup_html, ">= 0.1.0", [hex: :makeup_html, repo: "hexpm", optional: true]}], "hexpm", "5ce5f16b41208a50106afed3de6a2ed34f4acfd65715b82a0b84b49d995f95c1"},
   "jason": {:hex, :jason, "1.4.4", "b9226785a9aa77b6857ca22832cffa5d5011a667207eb2a0ad56adb5db443b8a", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "c5eb0cab91f094599f94d55bc63409236a8ec69a21a67814529e8d5f6cc90b3b"},
   "jiffy": {:hex, :jiffy, "1.1.2", "a9b6c9a7ec268e7cf493d028f0a4c9144f59ccb878b1afe42841597800840a1b", [:rebar3], [], "hexpm", "bb61bc42a720bbd33cb09a410e48bb79a61012c74cb8b3e75f26d988485cf381"},