Sample docker commands to build image on CI machine

docker-utils.sh

# ----------------------------------------------------------------------------
# Git Utilities to get the current git branch and last commit
# ----------------------------------------------------------------------------

# checks if branch has something pending
function _git_dirty() {
    git diff --quiet --ignore-submodules HEAD 2>/dev/null; [ $? -eq 1 ] && echo "*"
}

# gets the current git branch
function _git_branch() {
    git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e "s/* \(.*\)/\1$(_git_dirty)/"
}

# get last commit hash (i.e. c999e1864e65a29a8f9ad165221c67ce540f646a)
function _git_hash() {
    if [[ -z "${CODEBUILD_RESOLVED_SOURCE_VERSION}" ]]; then
        # Get git hash from developer machine
        git rev-parse HEAD 2> /dev/null
    else
        # Get git hash from AWS CodeBuild
        echo $CODEBUILD_RESOLVED_SOURCE_VERSION
    fi
}

# ----------------------------------------------------------------------------
# Docker Utilities
# ----------------------------------------------------------------------------

function docker_login() {
    # Get login cmd from aws ecr
    login_cmd=$(aws ecr get-login --no-include-email --profile $AWS_PROFILE)
    eval $login_cmd
}

function _awscli_get_login_cmd() {
    # Get login cmd from aws ecr
    login_cmd=$(aws ecr get-login --no-include-email --profile $AWS_PROFILE)
    echo $login_cmd
}

# Get a Docker login token and copy into the clipboard to share
function docker_login_token() {
    if ! which aws >/dev/null; then
        echo "=========================================================="
        echo "Missing aws-cli !!! Please reach your devops man for help."
        echo "=========================================================="
        return 1
    fi

    if [ "$(uname)" = "Darwin" ]; then # MACOS
        _awscli_get_login_cmd | pbcopy
        echo "Docker login token was copied into the clipboard."

    elif [ "$(expr substr $(uname -s) 1 5)" = "Linux" ]; then # Linux platform
        if ! which apt-get >/dev/null; then # Ubuntu only
            echo "======================================================="
            echo "Unsupport OS !!! Please reach your devops man for help."
            echo "======================================================="
            return 1
        fi

        if ! which xclip >/dev/null; then
            sudo apt-get install xclip
        fi

        _awscli_get_login_cmd | xclip -selection clipboard
        echo "Docker login token was copied into the clipboard."

    else
        echo "======================================================="
        echo "Unsupport OS !!! Please reach your devops man for help."
        echo "======================================================="
        return 1
    fi
}

function _docker_verify_git() {
    BRANCH=$(_git_branch)
    # If the source is dirty
    if [[ $BRANCH == *"*" ]] ; then
        echo "Please commit the changes before doing docker build/push"
        exit 1
    fi
}

function docker_build() {
    # Verify if there is pending code in git
    _docker_verify_git
    COMMIT_ID=$(_git_hash)
    docker build \
        -t ${GROUP}/${REPO}:$COMMIT_ID \
        -f $SRC_DIR/docker/Dockerfile \
        $SRC_DIR
}

function _docker_push_and_retry() {
    local DOCKER_PUSH=1;
    local MAX_RETRIES=3
    local retries=0
    while [ $DOCKER_PUSH -gt 0  ] && [ $retries -lt $MAX_RETRIES ]; do
        echo "Pushing $1"
        docker push $1
        DOCKER_PUSH=$(echo $?)
        if [[ "$DOCKER_PUSH" -gt 0 ]] ; then
            echo "Docker push failed with exit code $DOCKER_PUSH"
        fi
        retries=$[$retries+1]
        sleep 1
    done
}

function _docker_tag_and_push_all() {
    COMMIT_ID=$(_git_hash)
    if [[ -z "$1" ]] ; then
        echo "Please pass the tag"
        exit 1
    else
        TAG=$1
    fi
    DOCKER_REPO=${GROUP}/${REPO}
    if [[ "$COMMIT_ID" != "$TAG" ]]; then
        docker tag ${DOCKER_REPO}:${COMMIT_ID} ${DOCKER_REPO}:${TAG}
    fi
    _docker_push_and_retry "$DOCKER_REPO:$TAG"
}

function docker_push() {
    BRANCH=$(_git_branch)
    COMMIT_ID=$(_git_hash)

    local tag=$1

    # Verify if there is pending code in git
    _docker_verify_git

    # Push snapshot when in master
    if [ "$BRANCH" == "master" ]; then
        _docker_tag_and_push_all master-${COMMIT_ID:0:8}
        _docker_tag_and_push_all master
    fi

    # Push snapshot when in develop
    if [ "$BRANCH" == "develop" ]; then
        _docker_tag_and_push_all develop
    fi

    # Push snapshot when in beta
    if [ "$BRANCH" == "beta" ]; then
        _docker_tag_and_push_all beta
    fi

    # Verify if the tag has `release/` prefix
    # Then push `release` tag as well
    IFS='/' read -r -a array <<< "$BRANCH"
    BRANCH_PREFIX="${array[0]}"
    if [ "$BRANCH_PREFIX" == "release" ]; then
        _docker_tag_and_push_all ${BRANCH_PREFIX}
    fi

    # Push tag when tagged
    if [ -n "$tag" ]; then
        _docker_tag_and_push_all ${tag}
    fi
}