docker-build

#!/usr/bin/env bash
# vim: ft=bash
# Build cycles-ledger.wasm.gz inside docker. This outputs a single
# file, cycles-ledger.wasm.gz, in the top-level directory.

set -euo pipefail

# Make sure we always run from the root
SCRIPTS_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
cd "$SCRIPTS_DIR/.."

function title() {
    echo "Build cycles-ledger Ledger inside Docker"
}

function usage() {
    cat << EOF

Usage:
  $0 [<output_dir>]

<output_dir>: (optional) the directory where cycles-ledger.wasm.gz will be put. If unset then the root of the project is used.
EOF
}

function help() {
    cat << EOF

This will create (and override) "<output_dir>/cycles-ledger.wasm.gz".
EOF
}

## Building

function build() {
    outdir="$1"
    image_name="cycles-ledger"
    docker_build_args+=(--tag "$image_name" .)

    echo "The following image name will be used: $image_name"

    tmp_outdir=$(mktemp -d)

    set -x
    DOCKER_BUILDKIT=1 docker build "${docker_build_args[@]}" --output "$tmp_outdir" --progress plain
    set +x

    echo "Copying build output from $tmp_outdir to $PWD"
    mkdir -p "$(dirname ${outdir})"
    cp "$tmp_outdir/cycles-ledger.wasm.gz" "$outdir"

    echo "Removing $tmp_outdir"
    rm -rf "$tmp_outdir"
}

# ARGUMENT PARSING

if [[ $# -gt 1 ]]; then
    >&2 echo "Too many arguments"
    usage
    echo
    exit 1
fi

OUTDIR="."
while [[ $# -gt 0 ]]; do
    case $1 in
        -h|--help)
            title
            usage
            help
            exit 0
            ;;
        *)
            OUTDIR="$1"
            shift
            ;;
    esac
done

build "$OUTDIR"