Update deps

.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/dependabot.yml

@@ -0,0 +1,12 @@
+version: 2
+updates:
+  - package-ecosystem: "mix"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/ci.yml

@@ -0,0 +1,53 @@
+name: ci
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+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:
+        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@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:
+          otp-version: ${{ matrix.otp }}
+          elixir-version: ${{ matrix.elixir }}
+
+      - name: Install Hex and Rebar
+        run: |
+          mix local.hex --force
+          mix local.rebar --force
+
+      - name: Install dependencies
+        run: mix deps.get
+
+      - name: Check formatting
+        run: mix format --check-formatted
+
+      - name: Run tests
+        run: MIX_ENV=test mix test

.github/workflows/precompile.yml

@@ -10,20 +10,32 @@ jobs:
     runs-on: ubuntu-24.04
     env:
       MIX_ENV: "prod"
+      CC: gcc-14
+      CXX: g++-14
     strategy:
       matrix:
-        otp: ["27.0", "28.0"]
-        elixir: ["1.18.4"]
+        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}}
           elixir-version: ${{matrix.elixir}}
-      - name: Install system dependecies
+      - name: Install Hex and Rebar
+        run: |
+          mix local.hex --force
+          mix local.rebar --force
+      - 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
@@ -42,25 +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

@@ -1,17 +1,28 @@
 # Environment variables passed via elixir_make
 # ERTS_INCLUDE_DIR
 # MIX_APP_PATH
+# MIX_ENV
 
 TEMP ?= $(HOME)/.cache
+MIX_ENV ?= dev
 XGBOOST_CACHE ?= $(TEMP)/exgboost
 XGBOOST_GIT_REPO ?= https://github.com/dmlc/xgboost.git
-# v3.0.5 tagged release
-XGBOOST_GIT_REV ?= v3.0.5
+# v3.1.3 tagged release
+XGBOOST_GIT_REV ?= v3.1.3
+OLD_XGBOOST_GIT_REV ?= v3.0.5
+NEW_XGBOOST_GIT_REV ?= $(XGBOOST_GIT_REV)
 XGBOOST_NS = xgboost-$(XGBOOST_GIT_REV)
 XGBOOST_DIR = $(XGBOOST_CACHE)/$(XGBOOST_NS)
 XGBOOST_LIB_DIR = $(XGBOOST_DIR)/build/xgboost
 XGBOOST_LIB_DIR_FLAG = $(XGBOOST_LIB_DIR)/exgboost.ok
 
+# Set build type based on MIX_ENV
+ifeq ($(MIX_ENV), prod)
+	CMAKE_BUILD_TYPE = Release
+else
+	CMAKE_BUILD_TYPE = RelWithDebInfo
+endif
+
 # Private configuration
 PRIV_DIR = $(MIX_APP_PATH)/priv
 EXGBOOST_DIR = $(realpath c/exgboost)
@@ -43,21 +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)
-	mv $(XGBOOST_LIB_DIR)/lib/$(LIBXGBOOST) $(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) && \
@@ -69,10 +80,30 @@ $(XGBOOST_DIR)/.git:
 # It only contains the build commands.
 $(XGBOOST_LIB_DIR_FLAG): $(XGBOOST_DIR)/.git
 	cd $(XGBOOST_DIR) && \
-		cmake -B build -S . -DCMAKE_INSTALL_PREFIX=$(XGBOOST_LIB_DIR) -DCMAKE_BUILD_TYPE=RelWithDebInfo -GNinja $(CMAKE_FLAGS) && \
+		cmake -B build -S . -DCMAKE_INSTALL_PREFIX=$(XGBOOST_LIB_DIR) -DCMAKE_BUILD_TYPE=$(CMAKE_BUILD_TYPE) -GNinja $(CMAKE_FLAGS) && \
 		ninja -C build install
 	touch $(XGBOOST_LIB_DIR_FLAG)
 
+check-xgboost-c-api: $(XGBOOST_LIB_DIR_FLAG)
+	./scripts/check_xgboost_c_api.sh "$(XGBOOST_LIB_DIR)/include"
+
+compare-xgboost-c-api:
+	@set -eu; \
+	for rev in "$(OLD_XGBOOST_GIT_REV)" "$(NEW_XGBOOST_GIT_REV)"; do \
+		dir="$(XGBOOST_CACHE)/xgboost-$$rev"; \
+		mkdir -p "$$dir"; \
+		if [ ! -d "$$dir/.git" ]; then \
+			git -C "$$dir" init; \
+			git -C "$$dir" remote add origin "$(XGBOOST_GIT_REPO)"; \
+		fi; \
+		git -C "$$dir" fetch --depth 1 --recurse-submodules origin "$$rev"; \
+		git -C "$$dir" checkout -f FETCH_HEAD; \
+		git -C "$$dir" submodule update --init --recursive; \
+	done; \
+	./scripts/check_xgboost_c_api.sh --compare \
+		"$(XGBOOST_CACHE)/xgboost-$(OLD_XGBOOST_GIT_REV)/include" \
+		"$(XGBOOST_CACHE)/xgboost-$(NEW_XGBOOST_GIT_REV)/include"
+
 clean:
 	rm -rf $(EXGBOOST_CACHE_SO)
 	rm -rf $(EXGBOOST_CACHE_LIB_DIR)