Merge pull request #17 from LibrePCB/ubuntu-16.04-python-3

Ubuntu 16.04: Switch from Python 2.7 to Python 3.10

Author: ubruhin

ubuntu-16.04/Dockerfile

@@ -16,14 +16,14 @@ RUN apt-get update -q && apt-get -y -q install --no-install-recommends \
     graphviz \
     libc++-dev \
     libc++abi-dev \
+    libffi-dev \
     libglu1-mesa-dev \
     libqt5opengl5 \
     libqt5opengl5-dev \
     libqt5svg5-dev \
     libqt5sql5-sqlite \
     make \
     openssl \
-    python \
     qt5-default \
     qtdeclarative5-dev \
     qtdeclarative5-qtquick2-plugin \
@@ -35,14 +35,43 @@ RUN apt-get update -q && apt-get -y -q install --no-install-recommends \
     zlib1g-dev \
   && rm -rf /var/lib/apt/lists/*
 
-# Install PIP (the version from APT is not sufficient)
-RUN curl "https://bootstrap.pypa.io/2.7/get-pip.py" -o get-pip.py \
-  && python get-pip.py
+# Remove DST root certificate since it is not compatible with OpenSSL 1.0. This
+# is only needed for building the Docker image, afterwards we will have a newer
+# OpenSSL library.
+# See https://medium.com/geekculture/will-you-be-impacted-by-letsencrypt-dst-root-ca-x3-expiration-d54a018df257
+RUN sed -i 's/mozilla\/DST_Root_CA_X3.crt/!mozilla\/DST_Root_CA_X3.crt/g' \
+  /etc/ca-certificates.conf && update-ca-certificates
 
-# Install Python packages
-RUN pip install \
-  "future==0.17.1" \
-  "flake8==3.7.7"
+# Install OpenSSL 1.1 for Python/pip.
+ARG OPENSSL_VERSION="1.1.1l"
+RUN wget -c "https://www.openssl.org/source/openssl-$OPENSSL_VERSION.tar.gz" -O /tmp.tar.gz \
+  && tar -zxf /tmp.tar.gz \
+  && cd "./openssl-$OPENSSL_VERSION" \
+  && ./config --prefix=/usr --openssldir=/etc/ssl '-Wl,--enable-new-dtags,-rpath,$(LIBRPATH)' \
+  && make -s -j8 \
+  && make install > /dev/null \
+  && cd .. \
+  && rm -rf "./openssl-$OPENSSL_VERSION" \
+  && rm /tmp.tar.gz
+
+# Install Python & pip
+# Note: Actually Python 3.5 from the official Ubuntu repositories is
+# sufficient for us, but having a more recent version simplifies dependency
+# management since then we can drop support for Python 3.5.
+ARG PYTHON_VERSION="3.10.0"
+RUN wget "https://www.python.org/ftp/python/$PYTHON_VERSION/Python-$PYTHON_VERSION.tgz" \
+  && tar xzvf "./Python-$PYTHON_VERSION.tgz" \
+  && cd "./Python-$PYTHON_VERSION" \
+  && ./configure \
+  && make -j8 \
+  && make install \
+  && cd .. \
+  && rm -rf "./Python-$PYTHON_VERSION" \
+  && rm "./Python-$PYTHON_VERSION.tgz" \
+  && update-alternatives --install /usr/bin/python python /usr/local/bin/python3.10 100 \
+  && curl "https://bootstrap.pypa.io/pip/get-pip.py" -o get-pip.py \
+  && python get-pip.py \
+  && rm get-pip.py
 
 # LibrePCB's unittests expect that there is a USERNAME environment variable
 ENV USERNAME="root"