Rewrite apt-based CI

.ci/build/apt.py

@@ -0,0 +1,15 @@
+import os
+import subprocess
+
+os.environ["DEBIAN_FRONTEND"] = "noninteractive"
+
+subprocess.check_call(["apt-get", "update"])
+
+subprocess.check_call([
+    "apt-get", "-y", "--no-install-recommends", "install",
+    "build-essential", "cmake", "ninja-build", "pkg-config", "python3",
+    "libboost-dev", "libboost-date-time-dev", "libboost-exception-dev",
+    "libboost-log-dev", "libboost-filesystem-dev", "libboost-regex-dev",
+    "libdcmtk-dev", "libicu-dev", "libjsoncpp-dev", "zlib1g-dev",
+    "pybind11-dev", "python3-pybind11", "python3-dev",
+    "libboost-test-dev", "dcmtk"])

.ci/build/build.py

@@ -0,0 +1,25 @@
+import os
+import subprocess
+import sys
+
+print(f"Building with {sys.executable}")
+
+workspace = os.environ["WORKSPACE"]
+build_dir = os.environ.get("BUILD_DIR", os.path.join(workspace, "build"))
+install_dir = os.environ.get("INSTALL_DIR", os.path.join(workspace, "install"))
+
+for dir in [build_dir, install_dir]:
+    if not os.path.isdir(dir):
+        os.makedirs(dir)
+
+subprocess.check_call(
+    [
+        "cmake", 
+        "-G", "Ninja",
+        "-DPython_EXECUTABLE={}".format(sys.executable),
+        "-DCMAKE_INSTALL_PREFIX={}".format(install_dir), 
+        *([os.environ["CMAKE_OPTIONS"]] if "CMAKE_OPTIONS" in os.environ else []),
+        workspace],
+    cwd=build_dir)
+
+subprocess.check_call(["ninja", "install"], cwd=build_dir)

.github/workflows/build.yml

@@ -10,35 +10,33 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: ubuntu-latest
-            container: debian:bullseye
-            ci_type: deb
-          - os: ubuntu-latest
-            container: debian:bookworm
-            ci_type: deb
-            cmake_options: "-DCMAKE_CXX_STANDARD=17"
-          - os: ubuntu-latest
-            container: ubuntu:focal
-            ci_type: deb
-          - os: ubuntu-latest
-            container: ubuntu:jammy
-            ci_type: deb
-            cmake_options: "-DCMAKE_CXX_STANDARD=17"
+          - { os: "ubuntu-latest", container: "debian:bullseye", packaging: "apt", python: "python3"  }
+          - { os: "ubuntu-latest", container: "debian:bookworm", packaging: "apt", cmake_options: "-DCMAKE_CXX_STANDARD=17", python: "python3"  }
+          - { os: "ubuntu-latest", container: "ubuntu:focal", packaging: "apt", python: "python3"  }
+          - { os: "ubuntu-latest", container: "ubuntu:jammy", packaging: "apt", cmake_options: "-DCMAKE_CXX_STANDARD=17", python: "python3"  }
           # - name: "macOS 11 (Big Sur) + Homebrew"
           #   os: macos-11
           #   ci_type: brew
-          #   start_worker: ""
-          #   worker: ""
-          #   stop_worker: ""
     env:
       WORKSPACE: "${{ github.workspace }}"
       CMAKE_OPTIONS: "${{ matrix.cmake_options }}"
     steps:
+      - name: Provision (Debian, Ubuntu)
+        # Install Python and Git. macOS workers already have this, however for
+        # Linux we are running in minimal containers.
+        run: |
+          apt-get update
+          DEBIAN_FRONTEND=noninteractive apt-get install -y git python3
+        if: ${{ contains(matrix.packaging, 'apt') }}
+
       - name: Checkout latest revision
         uses: actions/checkout@v4
-      - name: Configure the build
-        run: ./.ci/${{ matrix.ci_type}}/install
+
+      - name: Set-up (${{ matrix.packaging }})
+        run: ${{ matrix.python }} .ci/build/${{ matrix.packaging }}.py
+
       - name: Build
-        run: ./.ci/${{ matrix.ci_type}}/build
-      - name: Run tests
-        run: ./.ci/${{ matrix.ci_type}}/post_build
+        run: ${{ matrix.python }} ./.ci/build/build.py
+
+      # - name: Run tests
+      #   run: ./.ci/${{ matrix.ci_type}}/post_build