Merge pull request #15 from LibrePCB/ubuntu-18.04-python-3

Ubuntu 18.04: Switch from Python 2.7 to Python 3.6

Author: ubruhin

ubuntu-18.04/Dockerfile

@@ -23,10 +23,10 @@ RUN apt-get update -q && apt-get -y -q install --no-install-recommends \
     libqt5sql5-sqlite \
     make \
     openssl \
-    python \
-    python-pip \
-    python-setuptools \
-    python-wheel \
+    python3 \
+    python3-pip \
+    python3-setuptools \
+    python3-wheel \
     qt5-default \
     qtdeclarative5-dev \
     qtdeclarative5-qtquick2-plugin \
@@ -38,10 +38,9 @@ RUN apt-get update -q && apt-get -y -q install --no-install-recommends \
     zlib1g-dev \
   && rm -rf /var/lib/apt/lists/*
 
-# Install Python packages
-RUN pip install \
-  "future==0.17.1" \
-  "flake8==3.7.7"
+# Set Python3 as default Python version
+RUN update-alternatives --install /usr/bin/python python /usr/bin/python3 100
+RUN update-alternatives --install /usr/bin/pip pip /usr/bin/pip3 100
 
 # LibrePCB's unittests expect that there is a USERNAME environment variable
 ENV USERNAME="root"