reduce size of the build image

Author: dimmg

Dockerfile

@@ -1,54 +1,59 @@
 FROM ubuntu:focal
 
 ARG DEBIAN_FRONTEND=noninteractive
-RUN apt-get update && apt-get install --no-install-recommends -y \
+RUN echo "===> Installing system dependencies..." && \
+    BUILD_DEPS="curl unzip wget" && \
+    apt-get update && apt-get install --no-install-recommends -y \
     python3 python3-pip \
     fonts-liberation libappindicator3-1 libasound2 libatk-bridge2.0-0 \
     libnspr4 libnss3 lsb-release xdg-utils libxss1 libdbus-glib-1-2 libgbm1 \
-    curl unzip wget \
-    xvfb
-
-
-# install geckodriver and firefox
-
-RUN GECKODRIVER_VERSION=`curl https://github.com/mozilla/geckodriver/releases/latest | grep -Po 'v[0-9]+.[0-9]+.[0-9]+'` && \
+    $BUILD_DEPS \
+    xvfb && \
+    \
+    \
+    echo "===> Installing geckodriver and firefox..." && \
+    GECKODRIVER_VERSION=`curl https://github.com/mozilla/geckodriver/releases/latest | grep -Po 'v[0-9]+.[0-9]+.[0-9]+'` && \
     wget https://github.com/mozilla/geckodriver/releases/download/$GECKODRIVER_VERSION/geckodriver-$GECKODRIVER_VERSION-linux64.tar.gz && \
     tar -zxf geckodriver-$GECKODRIVER_VERSION-linux64.tar.gz -C /usr/local/bin && \
     chmod +x /usr/local/bin/geckodriver && \
-    rm geckodriver-$GECKODRIVER_VERSION-linux64.tar.gz
-
-RUN FIREFOX_SETUP=firefox-setup.tar.bz2 && \
+    rm geckodriver-$GECKODRIVER_VERSION-linux64.tar.gz && \
+    \
+    FIREFOX_SETUP=firefox-setup.tar.bz2 && \
     apt-get purge firefox && \
     wget -O $FIREFOX_SETUP "https://download.mozilla.org/?product=firefox-latest&os=linux64" && \
     tar xjf $FIREFOX_SETUP -C /opt/ && \
     ln -s /opt/firefox/firefox /usr/bin/firefox && \
-    rm $FIREFOX_SETUP
-
-
-# install chromedriver and google-chrome
-
-RUN CHROMEDRIVER_VERSION=`curl -sS chromedriver.storage.googleapis.com/LATEST_RELEASE` && \
+    rm $FIREFOX_SETUP && \
+    \
+    \
+    echo "===> Installing chromedriver and google-chrome..." && \
+    CHROMEDRIVER_VERSION=`curl -sS chromedriver.storage.googleapis.com/LATEST_RELEASE` && \
     wget https://chromedriver.storage.googleapis.com/$CHROMEDRIVER_VERSION/chromedriver_linux64.zip && \
     unzip chromedriver_linux64.zip -d /usr/bin && \
     chmod +x /usr/bin/chromedriver && \
-    rm chromedriver_linux64.zip
-
-RUN CHROME_SETUP=google-chrome.deb && \
+    rm chromedriver_linux64.zip && \
+    \
+    CHROME_SETUP=google-chrome.deb && \
     wget -O $CHROME_SETUP "https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb" && \
     dpkg -i $CHROME_SETUP && \
     apt-get install -y -f && \
-    rm $CHROME_SETUP
-
-
-# install phantomjs
-
-RUN wget https://bitbucket.org/ariya/phantomjs/downloads/phantomjs-2.1.1-linux-x86_64.tar.bz2 && \
+    rm $CHROME_SETUP && \
+    \
+    \
+    echo "===> Installing phantomjs..." && \
+    wget https://bitbucket.org/ariya/phantomjs/downloads/phantomjs-2.1.1-linux-x86_64.tar.bz2 && \
     tar -jxf phantomjs-2.1.1-linux-x86_64.tar.bz2 && \
     cp phantomjs-2.1.1-linux-x86_64/bin/phantomjs /usr/local/bin/phantomjs && \
-    rm phantomjs-2.1.1-linux-x86_64.tar.bz2
-
+    rm phantomjs-2.1.1-linux-x86_64.tar.bz2 && \
+    \
+    \
+    echo "===> Installing python dependencies..." && \
+    pip3 install selenium==3.141.0 pyvirtualdisplay==2.2 && \
+    \
+    \
+    echo "===> Remove build dependencies..." && \
+    apt-get remove -y $BUILD_DEPS && rm -rf /var/lib/apt/lists/*
 
-RUN pip3 install selenium==3.141.0 pyvirtualdisplay==2.2
 
 ENV LANG C.UTF-8
 ENV LC_ALL C.UTF-8