Revert "Revert "Update to Elixir 1.18 (#132)" (#133)" (#134)

* update version

* bookworm and otp 27.2

* use 1.18.1

* consolidate docker commands

* clear /tmp of files created by root

* builder and runner

.github/workflows/elixir_tests.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-20.04
 
     container:
-      image: hexpm/elixir:1.17.0-erlang-27.0-debian-bookworm-20240612
+      image: hexpm/elixir:1.18.1-erlang-27.2-debian-bookworm-20241223
 
     steps:
       - name: Install git

.github/workflows/exercism_test_helper_build_test.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     container:
-      image: hexpm/elixir:1.17.0-erlang-27.0-debian-bookworm-20240612
+      image: hexpm/elixir:1.18.1-erlang-27.2-debian-bookworm-20241223
 
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683

.tool-versions

@@ -1,2 +1,2 @@
-elixir 1.17.0-otp-27
-erlang 27.0
+elixir 1.18.1-otp-27
+erlang 27.2

Dockerfile

@@ -1,8 +1,4 @@
-FROM hexpm/elixir:1.17.0-erlang-27.0-debian-bookworm-20240612
-
-# Install SSL ca certificates
-RUN apt-get update && \
-  apt-get install bash jo jq -y
+FROM hexpm/elixir:1.18.1-erlang-27.2-debian-bookworm-20241223 as builder
 
 # Create appuser
 RUN useradd -ms /bin/bash appuser
@@ -13,15 +9,23 @@ COPY . .
 
 # Compile the formatter
 WORKDIR /opt/test-runner/exercism_test_helper
-RUN mix local.rebar --force
-RUN mix local.hex --force
-RUN mix deps.get
-RUN MIX_ENV=test mix compile
-RUN mix test --no-compile
+RUN mix local.rebar --force && \
+  mix local.hex --force && \
+  mix deps.get && \
+  MIX_ENV=test mix compile && \
+  mix test --no-compile
 
 # Build the escript
-RUN MIX_ENV=prod mix escript.build
-RUN mv exercism_test_helper /opt/test-runner/bin
+RUN MIX_ENV=prod mix escript.build && \
+  mv exercism_test_helper /opt/test-runner/bin
+
+FROM hexpm/elixir:1.18.1-erlang-27.2-debian-bookworm-20241223 as runner
+COPY --from=builder /etc/passwd /etc/passwd
+COPY --from=builder /opt/test-runner /opt/test-runner
+
+# Install SSL ca certificates
+RUN apt-get update && \
+  apt-get install bash jo jq -y
 
 USER appuser
 

README.md

@@ -6,7 +6,7 @@ Exercism Automated Test Runner for Elixir Exercises
 
 ## Environment
 
-The test runner currently targets exercises supporting Elixir >= 1.12 and Erlang/OTP >= 24, but is running on Elixir 1.17.0 on hexpm's `elixir:1.17.0-erlang-27.0-debian-bookworm-20240612` image.
+The test runner currently targets exercises supporting Elixir >= 1.14 and Erlang/OTP >= 25, but is running on Elixir 1.18.0 on hexpm's `elixir:1.18.1-erlang-27.2-debian-bookworm-20241223` image.
 
 The `Dockerfile` also has added `bash`, `jo` and `jq` to the image.
 

exercism_test_helper/mix.exs

@@ -5,7 +5,7 @@ defmodule ExercismTestHelper.MixProject do
     [
       app: :exercism_test_helper,
       version: "0.1.2",
-      elixir: "~> 1.17",
+      elixir: "~> 1.18",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
       escript: escript()