# syntax = docker/dockerfile:1.3

# Copyright 2020-2022 Datawire. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

FROM --platform=$BUILDPLATFORM golang:alpine as telepresence-build

RUN apk add --no-cache gcc musl-dev fuse-dev libcap binutils-gold

WORKDIR telepresence
COPY go.mod .
COPY go.sum .
COPY cmd/cobraparser/ cmd/cobraparser/
COPY cmd/telepresence/ cmd/telepresence/
COPY pkg/ pkg/
COPY rpc/ rpc/
COPY charts/ charts/
COPY build-output/version.txt .
COPY build-output/helm-version.txt .

ARG TARGETOS
ARG TARGETARCH

RUN \
    --mount=type=cache,target=/root/.cache/go-build \
    --mount=type=cache,target=/go/pkg/mod \
    GOOS=$TARGETOS GOARCH=$TARGETARCH go build -o /usr/local/bin/ -trimpath -tags docker -ldflags="-s -w -X=$(go list ./pkg/version).Version=$(cat version.txt) -X=$(go list ./pkg/version).HelmVersion=$(cat helm-version.txt)" ./cmd/telepresence/...

# setcap is necessary because the process will listen to privileged ports
RUN setcap 'cap_net_bind_service+ep' /usr/local/bin/telepresence

# The telepresence target is the one that gets published. It aims to be a small as possible.
FROM alpine as telepresence

RUN apk add --no-cache ca-certificates iptables

# the telepresence binary
COPY --from=telepresence-build /usr/local/bin/telepresence /usr/local/bin

ENTRYPOINT ["telepresence"]
CMD []