docker-coredns

#!/bin/bash -e

# This script downloads the latest CoreDNS from github and creates a docker image
# and uploads it to the docker hub.
#
# Synopsis
# release-coredns [-t] VERSION
#
# -t: test run, only compile, don't upload anything

PROG=$(basename $0)

GITHUB=coredns/coredns
BRANCH=master
TESTING=

while getopts "t" o; do
    case "${o}" in
        t)
            TESTING=ON
            ;;
        *)
            echo "$PROG: Wrong flag: ${o}"
            exit 1
            ;;
    esac
done
shift $((OPTIND-1))

if [[ -z "$1" ]]; then
    echo "$PROG: Need version as first argument"
    exit 1
fi
WANTVERSION="$1"
export VERSION=${WANTVERSION}

if [[ "$TESTING" == "ON" ]]; then
    echo "$PROG: TEST ---***--- TEST ---***--- TEST"
fi

# fromGithub downloads owner/repo from Github into g/src/github.com/owner/repo.
function fromGithub {
    local TEMP="$1"
    local GITHUB="$2" # OWNER/REPO
    local BRANCH="$3"

    echo "$PROG: Getting $GITHUB (branch $BRANCH)"

    ( cd $TEMP
        mkdir -p g/src/github.com/$(dirname $GITHUB) && \
        cd g/src/github.com/$(dirname $GITHUB) && git clone -b $BRANCH --single-branch --depth 1 https://github.com/$GITHUB
    )
}

if [[ "$TESTING" == "ON" ]]; then
    TEMP=$(mktemp -d)

    fromGithub $TEMP $GITHUB $BRANCH

    echo "$PROG: Test docker building $GITHUB (branch $BRANCH) in $TEMP/g/src/github.com/$GITHUB"
    echo "$PROG: PATH is $PATH"

    ( cd $TEMP/g/src/github.com/$GITHUB
        make VERSION=${VERSION} DOCKER=x -f Makefile.docker release
    )

    echo "$PROG: This was a test run. Please remove $TEMP at your leisure."
    echo "$PROG: TEST ---***--- TEST ---***--- TEST"
    exit 0
fi

if [[ -z "$GITHUB_ACCESS_TOKEN" ]]; then
    echo "$PROG: No GITHUB_ACCESS_TOKEN set"
    exit 1
fi

TEMP=$(mktemp -d); function d1 { chmod -R +wx $TEMP; rm -rf $TEMP; }; trap d1 EXIT

fromGithub $TEMP $GITHUB $BRANCH

echo "$PROG: Building $GITHUB (branch $BRANCH) in $TEMP/g/src/github.com/$GITHUB"
echo "$PROG: PATH is $PATH"

( cd $TEMP/g/src/github.com/$GITHUB
    make VERSION=${VERSION} DOCKER=coredns -f Makefile.docker release
    make VERSION=${VERSION} DOCKER=coredns -f Makefile.docker docker-push
)