Microcontroller Continuous Integration with Docker_

#!/bin/sh
# microcode post-receive hook
# (c) 2018 Matthew J. Ernisse <matt@going-flying.com>
# All Rights Reserved.
#

set -e

GIT_AUTHOR=""
GIT_BRANCH=""
GIT_DIR=$(git rev-parse --git-dir 2>/dev/null)
PROJECTS=""
REV=0

try_container()
{
    local mapping="\
        led-timer:atmelbuilder \
        led-strand:atmelbuilder \
        bar-lighting:atmelbuilder \
        led-gadget:microchipbuilder \
        "
    if [ -z "$1" ]; then
        echo "usage: try_container project"
        return 1
    fi

    for x in $mapping; do
        if [ "$1" = "${x%%:*}" ]; then
            start-build-container.py \
                "${x##*:}" "$1" "$REV" "$GIT_AUTHOR"
            return
        fi
    done
}

if [ -z "$GIT_DIR" ]; then
    echo >&2 "fatal: post-receive GIT_DIR not set"
    exit 1
fi


while read oldrev newrev refname; do
    GIT_BRANCH=$refname
    REV=$newrev
done

GIT_AUTHOR=$(git show --format='%ae' --no-patch $REV)

for fn in $(git diff-tree --no-commit-id --name-only -r $REV); do
    PROJECTS="$PROJECTS $(dirname $fn)"
done

if [ ! "$GIT_BRANCH" = "refs/heads/master" ]; then
    exit
fi

for project in $PROJECTS; do
    try_container "$project"
done

#!/usr/bin/env python3
'''
start-build-container.py (c) 2018 Matthew J. Ernisse <matt@going-flying.com>
All Rights Reserved.

Redistribution and use in source and binary forms,
with or without modification, are permitted provided
that the following conditions are met:

    * Redistributions of source code must retain the
      above copyright notice, this list of conditions
      and the following disclaimer.
    * Redistributions in binary form must reproduce
      the above copyright notice, this list of conditions
      and the following disclaimer in the documentation
      and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
'''
import docker
import os
import sys

# Configuration
DOCKER_CA="CA.crt"
DOCKER_CLIENT=(
    "cert.pem",
    "key.pem"
)
DOCKER_ENGINE="whale.example.com:2367"
DOCKER_REPOSITORY="whale.example.com"

def run_container(container_name, image, args):
    ''' Execute a container. '''
    global DOCKER_CA, DOCKER_CLIENT, DOCKER_ENGINE
    tls_config = docker.tls.TLSConfig(
        client_cert=DOCKER_CLIENT,
        verify=DOCKER_CA
    )

    client = docker.DockerClient(
        base_url=DOCKER_ENGINE,
        tls=tls_config
    )

    client.containers.run(
        image,
        args,
        auto_remove=True,
        detach=True,
        name=container_name,
        volumes={
            '/var/www/autobuild': {
                'bind': '/output',
                'mode': 'rw',
            }
        }
    )

def usage():
    print("usage: {} image_name project_name git_rev author".format(
        os.path.basename(sys.argv[0]),
        file=sys.stderr
    )


if __name__ == "__main__":
    if not len(sys.argv) == 5:
        print("Invalid number of arguments.", file=sys.stderr)
        usage()
        sys.exit(1)

    builder = sys.argv[1]
    project = sys.argv[2]
    git_rev = sys.arv[3]
    author = sys.argv[4]

    container_name = "{}-builder--{}--{}".format(
        project,
        git_rev,
        author
    )

    image = "{}/{}:latest".format(DOCKER_REPOSITORY, builder)

    try:
        run_container(container_name, image, project)
        print("*** Running {}...".format(image))
    except Exception as e:
        print("!!! Failed to start container: {}".format(str(e)))