Script that generates Dockerfiles containting an ubuntu 14.04 with different versions of CERN's ROOT. The Dockerfiles are stored in this repository: https://github.com/KonstantinSchubert/ROOT_Dockerfiles And the resulting images can be found on https://hub.docker.com/r/schubertkonstantin/cern_root/

make_root_dockerfiles.py

import subprocess
import os
import re

dockerfile_template = \
"""FROM schubertkonstantin/root:dependencies

MAINTAINER Konstantin Schubert <schubert.konstantin@gmail.com>
# based on a Dockerfile by Sebastian Neubert

USER root

#trying to fix failing installs
RUN apt-get -y install  ncurses-dev libncurses5

WORKDIR /tmp

# clone ROOT
# By cloning all branches, we get the same base image for all builds
RUN git clone --depth 1 --branch {root_version} http://root.cern.ch/git/root.git
# install ROOT
RUN mkdir root-build \
    && cd root-build \
    && cmake ../root -Dmathmore=ON -Dminuit2=ON -Droofit=ON -Dhdfs=OFF  -Dbuiltin_xrootd=ON -DCMAKE_INSTALL_PREFIX=/usr/local \
    && make -j3 \
    && cmake --build . --target install \
    && cd .. \
    && rm -rf root root-build


ENV LD_LIBRARY_PATH /usr/local/lib:$LD_LIBRARY_PATH
ENV PYTHONPATH /usr/local/lib:$PYTHONPATH
"""

# clone or update the root repo
if os.path.exists("root"):
    p = subprocess.Popen(["git", "pull" ], cwd="./root/")
    p.communicate()
else:
    p = subprocess.Popen(["git", "clone", "http://root.cern.ch/git/root.git"], cwd=".")
    p.communicate()
# collect branches
p = subprocess.Popen(["git", "branch", "-a" ], cwd="./root/", stdout=subprocess.PIPE)
out, _ = p.communicate()
regex = re.compile(r'(v\d-\d\d-\d\d?\S+)')
root_branches = regex.findall(out)



# clone or update the dockerfile repo
if os.path.exists("./ROOT_Dockerfiles/"):
    p = subprocess.Popen(["git", "pull" ], cwd="./ROOT_Dockerfiles/")
    p.communicate()
else:
    subprocess.check_output(["git", "clone", "git@github.com:KonstantinSchubert/ROOT_Dockerfiles.git"])
# collect branches
p = subprocess.Popen(["git", "branch" ], cwd="./ROOT_Dockerfiles/", stdout=subprocess.PIPE)
out, _ = p.communicate()

regex = re.compile(r'(v\d-\d\d-\d\d?\S+)')
dockerfile_branches = regex.findall(out)

print root_branches
print dockerfile_branches


# for branches that have no branches yet, create branches and dockerfiles

for branch in root_branches:
    if branch in dockerfile_branches:
        p = subprocess.Popen(["git", "checkout", branch ], cwd="./ROOT_Dockerfiles/")
        p.communicate()
    else:
        p = subprocess.Popen(["git", "checkout", "-b", branch ], cwd="./ROOT_Dockerfiles/")
        p.communicate()
        for file_name in os.listdir("./ROOT_Dockerfiles"):
            if "dockerignore" not in file_name and ".git" not in file_name:
                os.remove("./ROOT_Dockerfiles/"+file_name)
    with open("./ROOT_Dockerfiles/Dockerfile","w") as dockerfile:
        dockerfile.write(dockerfile_template.replace("{root_version}",branch))
    p = subprocess.Popen(["git", "add", "--all"], cwd="./ROOT_Dockerfiles/")
    p.communicate()
    p = subprocess.Popen(["git", "commit", "-m", "automatic commit for "+branch], cwd="./ROOT_Dockerfiles/")
    p.communicate()
    p = subprocess.Popen(["git", "push", "--set-upstream", "origin", branch], cwd="./ROOT_Dockerfiles/")
    p.communicate()