Add Elixir and Erlang support via mise to provide BEAM

Dockerfile

@@ -222,6 +222,39 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     && rm -rf /var/lib/apt/lists/* \
     && bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)"
 
+### MISE (for Elixir/Erlang) ###
+
+ARG ERLANG_VERSION=27.1.2
+ARG ELIXIR_VERSION=1.18.3
+
+ENV MISE_DATA_DIR=/root/.local/share/mise
+ENV PATH=/root/.local/bin:$PATH
+
+# Install mise, then Erlang dependencies and Erlang/Elixir
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        autoconf \
+        automake \
+        libtool \
+        libwxgtk3.2-dev \
+        libgl1-mesa-dev \
+        libglu1-mesa-dev \
+        libpng-dev \
+        libssh-dev \
+        libncurses5-dev \
+        libodbc2 \
+        unixodbc-dev \
+    && rm -rf /var/lib/apt/lists/* \
+    && curl https://mise.run | sh \
+    && echo 'eval "$(~/.local/bin/mise activate bash)"' >> /etc/profile
+
+# Install Erlang and Elixir with mise in a bash shell
+RUN bash -c 'eval "$(~/.local/bin/mise activate bash)" \
+    && mise install erlang@${ERLANG_VERSION} \
+    && mise use --global erlang@${ERLANG_VERSION} \
+    && eval "$(~/.local/bin/mise activate bash)" \
+    && mise install elixir@${ELIXIR_VERSION}-otp-27 \
+    && mise use --global elixir@${ELIXIR_VERSION}-otp-27'
+
 ### SETUP SCRIPTS ###
 
 COPY setup_universal.sh /opt/codex/setup_universal.sh

README.md

@@ -24,6 +24,8 @@ docker run --rm -it \
     -e CODEX_ENV_RUST_VERSION=1.87.0 \
     -e CODEX_ENV_GO_VERSION=1.23.8 \
     -e CODEX_ENV_SWIFT_VERSION=6.1 \
+    -e CODEX_ENV_ERLANG_VERSION=27.1.2 \
+    -e CODEX_ENV_ELIXIR_VERSION=1.18.3 \
     # Mount the current directory similar to how it would get cloned in.
     -v $(pwd):/workspace/$(basename $(pwd)) -w /workspace/$(basename $(pwd)) \
     ghcr.io/openai/codex-universal:latest
@@ -35,13 +37,15 @@ docker run --rm -it \
 
 The following environment variables can be set to configure runtime installation. Note that a limited subset of versions are supported (indicated in the table below):
 
-| Environment variable       | Description                | Supported versions                               | Additional packages                                                  |
-| -------------------------- | -------------------------- | ------------------------------------------------ | -------------------------------------------------------------------- |
-| `CODEX_ENV_PYTHON_VERSION` | Python version to install  | `3.10`, `3.11.12`, `3.12`, `3.13`                | `pyenv`, `poetry`, `uv`, `ruff`, `black`, `mypy`, `pyright`, `isort` |
-| `CODEX_ENV_NODE_VERSION`   | Node.js version to install | `18`, `20`, `22`                                 | `corepack`, `yarn`, `pnpm`, `npm`                                    |
-| `CODEX_ENV_RUST_VERSION`   | Rust version to install    | `1.83.0`, `1.84.1`, `1.85.1`, `1.86.0`, `1.87.0` |                                                                      |
-| `CODEX_ENV_GO_VERSION`     | Go version to install      | `1.22.12`, `1.23.8`, `1.24.3`                    |                                                                      |
-| `CODEX_ENV_SWIFT_VERSION`  | Swift version to install   | `5.10`, `6.1`                                    |                                                                      |
+| Environment variable        | Description                 | Supported versions                               | Additional packages                                                  |
+| --------------------------- | --------------------------- | ------------------------------------------------ | -------------------------------------------------------------------- |
+| `CODEX_ENV_PYTHON_VERSION`  | Python version to install  | `3.10`, `3.11.12`, `3.12`, `3.13`                | `pyenv`, `poetry`, `uv`, `ruff`, `black`, `mypy`, `pyright`, `isort` |
+| `CODEX_ENV_NODE_VERSION`    | Node.js version to install | `18`, `20`, `22`                                 | `corepack`, `yarn`, `pnpm`, `npm`                                    |
+| `CODEX_ENV_RUST_VERSION`    | Rust version to install    | `1.83.0`, `1.84.1`, `1.85.1`, `1.86.0`, `1.87.0` |                                                                      |
+| `CODEX_ENV_GO_VERSION`      | Go version to install      | `1.22.12`, `1.23.8`, `1.24.3`                    |                                                                      |
+| `CODEX_ENV_SWIFT_VERSION`   | Swift version to install   | `5.10`, `6.1`                                    |                                                                      |
+| `CODEX_ENV_ERLANG_VERSION`  | Erlang version to install  | Any version supported by mise (e.g., `27.1.2`, `26.2.5`) | `mise` version manager                              |
+| `CODEX_ENV_ELIXIR_VERSION`  | Elixir version to install  | Any version supported by mise (e.g., `1.18.3`, `1.17.3`) | `mise` version manager, automatically matched with Erlang OTP |
 
 ## What's included
 

setup_universal.sh

@@ -7,6 +7,8 @@ CODEX_ENV_NODE_VERSION=${CODEX_ENV_NODE_VERSION:-}
 CODEX_ENV_RUST_VERSION=${CODEX_ENV_RUST_VERSION:-}
 CODEX_ENV_GO_VERSION=${CODEX_ENV_GO_VERSION:-}
 CODEX_ENV_SWIFT_VERSION=${CODEX_ENV_SWIFT_VERSION:-}
+CODEX_ENV_ERLANG_VERSION=${CODEX_ENV_ERLANG_VERSION:-}
+CODEX_ENV_ELIXIR_VERSION=${CODEX_ENV_ELIXIR_VERSION:-}
 
 echo "Configuring language runtimes..."
 
@@ -60,3 +62,28 @@ if [ -n "${CODEX_ENV_SWIFT_VERSION}" ]; then
         swiftly install --use "${CODEX_ENV_SWIFT_VERSION}"
     fi
 fi
+
+if [ -n "${CODEX_ENV_ERLANG_VERSION}" ]; then
+    # Activate mise for this shell session
+    eval "$(~/.local/bin/mise activate bash)"
+    current=$(mise current erlang 2>/dev/null || echo "none")
+    echo "# Erlang: ${CODEX_ENV_ERLANG_VERSION} (default: ${current})"
+    if [ "${current}" != "${CODEX_ENV_ERLANG_VERSION}" ]; then
+        mise install erlang@"${CODEX_ENV_ERLANG_VERSION}"
+        mise use --global erlang@"${CODEX_ENV_ERLANG_VERSION}"
+    fi
+fi
+
+if [ -n "${CODEX_ENV_ELIXIR_VERSION}" ]; then
+    # Activate mise for this shell session
+    eval "$(~/.local/bin/mise activate bash)"
+    current=$(mise current elixir 2>/dev/null | cut -d'-' -f1 || echo "none")
+    echo "# Elixir: ${CODEX_ENV_ELIXIR_VERSION} (default: ${current})"
+    if [ "${current}" != "${CODEX_ENV_ELIXIR_VERSION}" ]; then
+        # Determine OTP version for Elixir installation
+        erlang_version=$(mise current erlang 2>/dev/null || echo "27")
+        otp_version=$(echo "$erlang_version" | cut -d'.' -f1)
+        mise install elixir@"${CODEX_ENV_ELIXIR_VERSION}"-otp-"${otp_version}"
+        mise use --global elixir@"${CODEX_ENV_ELIXIR_VERSION}"-otp-"${otp_version}"
+    fi
+fi