Docker builder environment

Author: ChristianHinge

src/recon/Dockerfile

@@ -1,41 +1,52 @@
-FROM ubuntu:22.04
+# ── Stage 1: Build STIR ──────────────────────────────────────────────────────
+FROM ubuntu:22.04 AS builder
 
-# Install dependencies
-RUN apt-get update && apt-get install -y \
-    git \
-    cmake \
-    build-essential \
-    libboost-all-dev \
-    libhdf5-dev \
-    python3-dev \
-    python3-pip \
-    swig \
-    libfftw3-dev
-RUN apt-get install libinsighttoolkit5-dev -y
-RUN apt install nlohmann-json3-dev -y
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    git cmake build-essential \
+    libboost-all-dev libhdf5-dev libfftw3-dev \
+    python3-dev python3-pip \
+    swig libinsighttoolkit5-dev nlohmann-json3-dev \
+ && rm -rf /var/lib/apt/lists/*
 
-# Clone and build STIR
-RUN git clone https://github.com/UCL/STIR && cd STIR && git checkout 46da4ef2b8b38487b08f5aa48c6e38b568a584cc
+RUN pip install --no-cache-dir numpy
 
+RUN git clone https://github.com/UCL/STIR \
+ && cd STIR \
+ && git checkout 46da4ef2b8b38487b08f5aa48c6e38b568a584cc
 
-RUN pip install numpy
-RUN mkdir build && cd build && cmake ../STIR -DBUILD_SWIG_PYTHON=ON -DSTIR_BUILD_EXECUTABLES=ON -DPython_EXECUTABLE=/usr/bin/python3 && make -j 8 && make install
-RUN pip install nibabel scipy
+RUN mkdir /build && cd /build \
+ && cmake /STIR \
+    -DBUILD_SWIG_PYTHON=ON \
+    -DSTIR_BUILD_EXECUTABLES=ON \
+    -DPython_EXECUTABLE=/usr/bin/python3 \
+ && make -j$(nproc) \
+ && make install
 
+RUN pip install --no-cache-dir nibabel scipy
 
+# ── Stage 2: Runtime ─────────────────────────────────────────────────────────
+FROM ubuntu:22.04
 
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    python3 \
+    libboost-filesystem1.74.0 \
+    libboost-program-options1.74.0 \
+    libboost-regex1.74.0 \
+    libboost-serialization1.74.0 \
+    libboost-thread1.74.0 \
+    libboost-iostreams1.74.0 \
+    libboost-date-time1.74.0 \
+    libhdf5-103 \
+    libfftw3-double3 \
+ && rm -rf /var/lib/apt/lists/*
+
+# Copy STIR install (executables, libs, Python bindings) + pip packages
+COPY --from=builder /usr/local /usr/local
+RUN ldconfig
 
-# Copy recon folder
 WORKDIR /recon
 COPY . .
 
-# Mount host directories to these paths at runtime:
-#   -v /host/recon_folder:/data/recon
-#   -v /host/ct.nii.gz:/data/ct/ct.nii.gz
-#   -v /host/output:/data/output
-#   -v /host/intermediates:/data/intermediates
-
-# Set OVERWRITE=1 at runtime to enable overwriting existing files
 ENV PYTHONPATH="/usr/local/python"
 ENV OVERWRITE=""