cuttlectl

#!/bin/bash

set -e
set -o pipefail

PKGS=https://github.com/cuttlefacts/packages.git

function usage {
    echo "Usage:" >&2
    echo "cuttlectl bootstrap" >&2
    echo "  bootstrap a cluster by installing a sync to the" >&2
    echo "  git origin of the working directory." >&2
    echo >&2
    echo "cuttlectl install <pkg> <dir>" >&2
    echo "  install the package <pkg> into the directory <dir>," >&2
    echo "  and add to the git index, ready to commit". >&2
    echo >&2
    echo "cuttlectl expand <dir>" >&2
    echo "  run the function specified in <dir> to generate YAMLs" >&2
    echo >&2
    echo "cuttlectl sync"
    echo "  ask the sync to pull from origin and apply" >&2
}

function bootstrap {
    local origin=$(git remote get-url origin)
    if [ -z "$origin" ]; then
        echo "error: no git remote 'origin' found" >&2
        exit 1
    fi

    echo "==> Getting flux-readonly package as bootstrap/" >&2
    kpt pkg get $PKGS/flux-readonly@17eb975 bootstrap

    echo "==> Setting bootstrap sync URL to $origin" >&2
    kpt cfg set bootstrap git-url "$origin"
    kpt cfg set bootstrap namespace bootstrap-system

    echo "==> Commit changes and pushing to origin" >&2
    git add bootstrap
    git commit -m "Add bootstrap sync"
    git push origin

    echo "==> Applying bootstrap sync to cluster" >&2
    # NB a little cheat: make sure the namespace is applied first,
    # otherwise this will fail the first time.
    kubectl apply -f bootstrap/*-ns.yaml
    kubectl apply -f bootstrap/
}

function install {
    # cuttlectl install <package> <dir>
    local pkg="$1"
    local dir="$2"
    echo "=> Fetching package into $dir" >&2
    kpt pkg get "$PKGS/$pkg" "$dir"
    echo >&2
    echo "Done. Next you may want to:" >&2
    echo >&2
    echo "    git add $dir && git commit" >&2
}

function expand {
    # cuttlectl expand <dir>
    local dir="$1"
    echo "==> Expanding package in $dir" >&2
    kpt fn run "$dir"
    echo >&2
    echo "Done. Next you may want to:" >&2
    echo >&2
    echo "    git add $dir && git commit" >&2
}

function sync {
    # cuttlectl sync
    fluxctl --k8s-fwd-ns bootstrap-system sync
}

CMD=$1
shift 1

case "$CMD" in
    bootstrap)
        bootstrap
        ;;
    install)
        install "$1" "$2"
        ;;
    expand)
        expand "$1"
        ;;
    sync)
        sync
        ;;
    *)
        usage
        ;;
esac