From c0a770ab8612f67ee7fb3fc503ff1afe2fa44b9c Mon Sep 17 00:00:00 2001
From: Andy Li <1450947+andy1li@users.noreply.github.com>
Date: Tue, 16 Dec 2025 13:27:35 +0900
Subject: [PATCH] CC-2081: Update Elixir to 1.19

---
 compiled_starters/elixir/codecrafters.yml     |  4 +--
 dockerfiles/elixir-1.19.Dockerfile            | 25 +++++++++++++++++++
 solutions/elixir/01-at4/code/codecrafters.yml |  4 +--
 3 files changed, 29 insertions(+), 4 deletions(-)
 create mode 100644 dockerfiles/elixir-1.19.Dockerfile

diff --git a/compiled_starters/elixir/codecrafters.yml b/compiled_starters/elixir/codecrafters.yml
index ad810ea..4ecc9f5 100644
--- a/compiled_starters/elixir/codecrafters.yml
+++ b/compiled_starters/elixir/codecrafters.yml
@@ -7,5 +7,5 @@ debug: false
 # Use this to change the Elixir version used to run your code
 # on Codecrafters.
 #
-# Available versions: elixir-1.18
-buildpack: elixir-1.18
+# Available versions: elixir-1.19
+buildpack: elixir-1.19
diff --git a/dockerfiles/elixir-1.19.Dockerfile b/dockerfiles/elixir-1.19.Dockerfile
new file mode 100644
index 0000000..4639daa
--- /dev/null
+++ b/dockerfiles/elixir-1.19.Dockerfile
@@ -0,0 +1,25 @@
+# syntax=docker/dockerfile:1.7-labs
+FROM elixir:1.19.4-alpine
+
+# Ensures the container is re-built if dependency files change
+ENV CODECRAFTERS_DEPENDENCY_FILE_PATHS="mix.exs"
+
+WORKDIR /app
+
+# .git & README.md are unique per-repository. We ignore them on first copy to prevent cache misses
+COPY --exclude=.git --exclude=README.md . /app
+
+# install hex + rebar
+RUN mix local.hex --force && \
+  mix local.rebar --force
+
+# install and compile mix dependencies
+RUN mix deps.get && \
+  mix deps.compile
+
+# Install & cache deps
+RUN .codecrafters/compile.sh
+
+RUN mkdir -p /app-cached
+RUN if [ -d "/app/_build" ]; then mv /app/_build /app-cached; fi
+RUN if [ -d "/app/deps" ]; then mv /app/deps /app-cached; fi
diff --git a/solutions/elixir/01-at4/code/codecrafters.yml b/solutions/elixir/01-at4/code/codecrafters.yml
index ad810ea..4ecc9f5 100644
--- a/solutions/elixir/01-at4/code/codecrafters.yml
+++ b/solutions/elixir/01-at4/code/codecrafters.yml
@@ -7,5 +7,5 @@ debug: false
 # Use this to change the Elixir version used to run your code
 # on Codecrafters.
 #
-# Available versions: elixir-1.18
-buildpack: elixir-1.18
+# Available versions: elixir-1.19
+buildpack: elixir-1.19