docker-build

#!/usr/bin/env bash
# vim: ft=bash
# Build internet_identity.wasm inside docker. This outputs internet_identity.wasm.gz,
# and / or archive.wasm.gz depending on the provided arguments 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 Internet Identity inside Docker"
}

function usage() {
    cat << EOF

Usage:
  $0 [--internet-identity] [--archive] [--dfx-metadata METADATA]

Options:
  --internet-identity          build the internet_identity canister (alongside other specifically mentioned canisters), defaults to --internet-identity
  --archive                    build the archive canister (alongside other specifically mentioned canisters), defaults to --internet-identity
  --dfx-metadata METADATA      DFX metadata to include in the canister public metadata section

Environment:
  II_FETCH_ROOT_KEY     When set to "1", enable the "II_FETCH_ROOT_KEY" feature.
  II_DUMMY_CAPTCHA      When set to "1", enable the "II_DUMMY_CAPTCHA" feature.
  II_DUMMY_AUTH         When set to "1", enable the "II_DUMMY_AUTH" feature.
  II_INSECURE_REQUESTS  When set to "1", enable the "II_INSECURE_REQUESTS" feature.
EOF
}

function help() {
    cat << EOF

This will create (and override) "./internet_identity.wasm.gz" or "./archive.wasm.gz". For more information on build features, see:
    https://github.com/dfinity/internet-identity#build-features-and-flavors
EOF
}

## Building

# forward "feature" environment variables ("$2") to the docker build
# NOTE: feature name ("$1") must be lower case as it's used in the image name
function check_feature() {
    local varname="$2"
    local featurename="$1"
    local value="${!varname:-}"

    if [[ "$value" == "1" ]]
    then
        echo "Using feature $featurename ($varname)"
        docker_build_args+=( --build-arg "$varname=$value" )
        image_name="$image_name-$featurename"
    fi
}

# Builds a single canister using docker
# build_canister CANISTER
# CANISTER: possible values: [internet_identity, archive]
function build() {
    local canister="$1"
    local dfx_metadata="$2"

    # image name and build args, made global because they're used in
    # check_feature()
    image_name="ii-docker-build"
    docker_build_args=( --target "scratch_$canister" )

    check_feature "fetchrootkey" "II_FETCH_ROOT_KEY"
    check_feature "dummycaptcha" "II_DUMMY_CAPTCHA"
    check_feature "dummyauth" "II_DUMMY_AUTH"
    check_feature "insecurerequests" "II_INSECURE_REQUESTS"

    docker_build_args+=(--tag "$image_name" .)

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

    tmp_outdir=$(mktemp -d)

    local version="$(./scripts/version)"
    echo "The following version will be used: '$version'"

    set -x
    DOCKER_BUILDKIT=1 docker build \
        --build-arg II_VERSION="$version" \
        --build-arg DFX_METADATA="$dfx_metadata" \
        "${docker_build_args[@]}" \
        --output "$tmp_outdir"
    set +x

    echo "Copying build output from $tmp_outdir to $PWD"
    cp "$tmp_outdir/$canister.wasm.gz" .

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

# ARGUMENT PARSING

CANISTERS=()
DFX_METADATA=
while [[ $# -gt 0 ]]
do
    case $1 in
        -h|--help)
            title
            usage
            help
            exit 0
            ;;
        --internet-identity)
            CANISTERS+=("internet_identity")
            shift
            ;;
        --archive)
            CANISTERS+=("archive")
            shift
            ;;
        --dfx-metadata)
            DFX_METADATA="${2:?missing value for '--dfx-metadata'}"
            shift; # shift past --dfx-metadata and value
            shift;
            ;;
        *)
            echo "ERROR: unknown argument $1"
            usage
            echo
            echo "Use '$0 --help' for more information"
            exit 1
            ;;
    esac
done

# build II by default
if [ ${#CANISTERS[@]} -eq 0 ]; then
    CANISTERS=("internet_identity")
fi

for canister in "${CANISTERS[@]}"
do
    build "$canister" "$DFX_METADATA"
done