Upgrade to elixir 1.20.2 plus other updates

.devcontainer/Dockerfile

@@ -0,0 +1,46 @@
+FROM hexpm/elixir:1.20.2-erlang-29.0.2-debian-trixie-20260623-slim
+
+ENV DEBIAN_FRONTEND=noninteractive
+ENV LANG=C.UTF-8
+ENV LC_ALL=C.UTF-8
+ENV CC=gcc-14
+ENV CXX=g++-14
+
+RUN apt-get update && \
+  apt-get dist-upgrade --yes && \
+  apt-get install --yes --no-install-recommends \
+    build-essential \
+    ca-certificates \
+    cmake \
+    curl \
+    g++-14 \
+    gcc-14 \
+    git \
+    inotify-tools \
+    ninja-build \
+    openssh-client \
+    pkg-config \
+    python3 \
+    python3-venv \
+    sudo \
+    zsh && \
+  update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-14 140 && \
+  update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-14 140 && \
+  update-alternatives --install /usr/bin/cc cc /usr/bin/gcc-14 140 && \
+  update-alternatives --install /usr/bin/c++ c++ /usr/bin/g++-14 140 && \
+  apt-get clean && \
+  rm -rf /var/lib/apt/lists/*
+
+RUN useradd -m -s /bin/zsh -u 1000 -G sudo dev && \
+  echo 'dev ALL=(ALL) NOPASSWD:ALL' > /etc/sudoers.d/dev && \
+  chmod 0440 /etc/sudoers.d/dev && \
+  mkdir -p /workspace && \
+  chown dev:dev /workspace
+
+USER dev
+
+RUN git config --global --add safe.directory /workspace && \
+  mix local.hex --force && \
+  mix local.rebar --force
+
+WORKDIR /workspace

.devcontainer/devcontainer-lock.json

@@ -0,0 +1,24 @@
+{
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "version": "2.5.9",
+      "resolved": "ghcr.io/devcontainers/features/common-utils@sha256:cb0c4d3c276f157eed17935747e364178d75fee17f55c4e129966f64633deb3a",
+      "integrity": "sha256:cb0c4d3c276f157eed17935747e364178d75fee17f55c4e129966f64633deb3a"
+    },
+    "ghcr.io/devcontainers/features/docker-outside-of-docker:1": {
+      "version": "1.10.0",
+      "resolved": "ghcr.io/devcontainers/features/docker-outside-of-docker@sha256:c2c2cf829505ead8e4892c88c31b6594ae94a2bbb209e16e1fac456c1a3a624e",
+      "integrity": "sha256:c2c2cf829505ead8e4892c88c31b6594ae94a2bbb209e16e1fac456c1a3a624e"
+    },
+    "ghcr.io/devcontainers/features/git:1": {
+      "version": "1.3.7",
+      "resolved": "ghcr.io/devcontainers/features/git@sha256:a3e43ff91b9f5f6bd2c14bd510d43e5e698f1266dc41027ba4e04e7e45be607a",
+      "integrity": "sha256:a3e43ff91b9f5f6bd2c14bd510d43e5e698f1266dc41027ba4e04e7e45be607a"
+    },
+    "ghcr.io/devcontainers/features/github-cli:1": {
+      "version": "1.1.0",
+      "resolved": "ghcr.io/devcontainers/features/github-cli@sha256:d22f50b70ed75339b4eed1ba9ecde3a1791f90e88d37936517e3bace0bbad671",
+      "integrity": "sha256:d22f50b70ed75339b4eed1ba9ecde3a1791f90e88d37936517e3bace0bbad671"
+    }
+  }
+}

.devcontainer/devcontainer.json

@@ -0,0 +1,33 @@
+{
+  "name": "EXGBoost Erlang 29 GCC 14",
+  "build": {
+    "dockerfile": "Dockerfile",
+    "context": ".."
+  },
+  "workspaceMount": "source=${localWorkspaceFolder},target=/workspace,type=bind,consistency=cached",
+  "workspaceFolder": "/workspace",
+  "containerEnv": {
+    "CC": "gcc-14",
+    "CXX": "g++-14",
+    "MIX_ENV": "dev"
+  },
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "jakebecker.elixir-ls"
+      ]
+    }
+  },
+  "postCreateCommand": "mix deps.get",
+  "remoteUser": "dev",
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "configureZshAsDefaultShell": true
+    },
+    "ghcr.io/devcontainers/features/git:1": {},
+    "ghcr.io/devcontainers/features/github-cli:1": {},
+    "ghcr.io/devcontainers/features/docker-outside-of-docker:1": {
+      "moby": false
+    }
+  }
+}

.github/workflows/ci.yml

@@ -10,14 +10,28 @@ jobs:
   test:
     name: Test OTP ${{ matrix.otp }} / Elixir ${{ matrix.elixir }}
     runs-on: ubuntu-24.04
+    env:
+      CC: gcc-14
+      CXX: g++-14
+      MIX_ENV: test
     strategy:
       fail-fast: false
       matrix:
-        otp: ["28.3"]
-        elixir: ["1.18.4", "1.19.5"]
+        include:
+          - otp: "28.3"
+            elixir: "1.18.4"
+          - otp: "28.3"
+            elixir: "1.19.5"
+          - otp: "29.0.2"
+            elixir: "1.20.2"
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
+
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y build-essential cmake ninja-build gcc-14 g++-14
 
       - uses: erlef/setup-beam@v1
         with:
@@ -36,4 +50,4 @@ jobs:
         run: mix format --check-formatted
 
       - name: Run tests
-        run: MIX_ENV=test mix test
+        run: MIX_ENV=test mix test

.github/workflows/precompile.yml

@@ -10,12 +10,19 @@ jobs:
     runs-on: ubuntu-24.04
     env:
       MIX_ENV: "prod"
+      CC: gcc-14
+      CXX: g++-14
     strategy:
       matrix:
-        otp: ["28.3"]
-        elixir: ["1.18.4", "1.19.5"]
+        include:
+          - otp: "28.3"
+            elixir: "1.18.4"
+          - otp: "28.3"
+            elixir: "1.19.5"
+          - otp: "29.0.2"
+            elixir: "1.20.2"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v5
       - uses: erlef/setup-beam@v1
         with:
           otp-version: ${{matrix.otp}}
@@ -24,10 +31,11 @@ jobs:
         run: |
           mix local.hex --force
           mix local.rebar --force
-      - name: Install system dependecies
+      - name: Install system dependencies
         run: |
           sudo apt-get update
           sudo apt-get install -y build-essential automake autoconf pkg-config bc m4 unzip zip \
+            cmake ninja-build gcc-14 g++-14 \
             gcc-aarch64-linux-gnu g++-aarch64-linux-gnu \
             gcc-riscv64-linux-gnu g++-riscv64-linux-gnu
       - name: Mix Test
@@ -46,25 +54,16 @@ jobs:
             cache/*.tar.gz
 
   macos:
-    runs-on: ${{matrix.runner}}
-    # Homebrew supports versioned Erlang/OTP but not Elixir
-    # It's a deliberate design decision from Homebrew to
-    # only support versioned distributions for certain packages
-    name: Mac (ARM) Erlang/OTP ${{matrix.otp}} / Elixir
+    runs-on: macos-15
+    name: Mac (ARM) Erlang/OTP 29.0.2 / Elixir 1.20.2
     env:
       MIX_ENV: "prod"
-    strategy:
-      matrix:
-        runner: ["macos-15"]
-        otp: ["27.0", "28.0"]
-        elixir: ["1.18.4"]
     steps:
-      - uses: actions/checkout@v3
-      - uses: asdf-vm/actions/install@v2
+      - uses: actions/checkout@v5
+      - uses: erlef/setup-beam@v1
         with:
-          tool_versions: |
-            erlang ${{matrix.otp}}
-            elixir ${{matrix.elixir}}
+          otp-version: "29.0.2"
+          elixir-version: "1.20.2"
       - name: Install libomp
         run: |
           brew install libomp

.gitignore

@@ -9,7 +9,6 @@ erl_crash.dump
 *.beam
 /config/*.secret.exs
 .elixir_ls/
-.tool-versions
 .vscode/
 checksum.exs
 .DS_Store

Makefile

@@ -54,21 +54,21 @@ else
 endif
 
 $(EXGBOOST_SO): $(EXGBOOST_CACHE_SO)
-	@ mkdir -p $(PRIV_DIR)
+	@mkdir -p $(PRIV_DIR)
 	cp -a $(abspath $(EXGBOOST_CACHE_LIB_DIR)) $(EXGBOOST_LIB_DIR) ; \
 	cp -a $(abspath $(EXGBOOST_CACHE_SO)) $(EXGBOOST_SO) ;
 
 $(EXGBOOST_CACHE_SO): $(XGBOOST_LIB_DIR_FLAG) $(C_SRCS)
 	@mkdir -p cache
-	cp -a $(XGBOOST_LIB_DIR) $(EXGBOOST_CACHE_LIB_DIR)
+	cp -R $(XGBOOST_LIB_DIR) $(EXGBOOST_CACHE_LIB_DIR)
 	cp $(XGBOOST_DIR)/lib/$(LIBXGBOOST) $(EXGBOOST_CACHE_LIB_DIR)
 	$(CC) $(CFLAGS) $(wildcard $(EXGBOOST_DIR)/src/*.c) $(LDFLAGS) -o $(EXGBOOST_CACHE_SO)
 	$(POST_INSTALL)
 
 # This new target handles fetching the source code.
 # It only runs if the .git directory inside the source folder is missing.
 $(XGBOOST_DIR)/.git:
-	mkdir -p $(XGBOOST_DIR) && \
+	@mkdir -p $(XGBOOST_DIR) && \
 		cd $(XGBOOST_DIR) && \
 		git init && \
 		git remote add origin $(XGBOOST_GIT_REPO) && \