Earthfile

VERSION 0.8
FROM node:13.10.1-alpine3.11

WORKDIR /example-grpc

# This example shows how to use earthly to compile a protobuf grpc definition
# into protobuf code for both a Go-based server, and a python-based client.
#
# This example spans 5 different git repositories, each containing an Earthfile:
#
# 1) https://github.com/earthly/earthly-example-proto
# This repository contains the api.proto definition along with an Earthfile
# which installs the various protoc tools required to generate the go, python,
# and ruby code.
#
# 2) https://github.com/earthly/earthly-example-proto-server
# This repository contains a server written in go along with an Earthfile
# that pulls in the auto-generated go code from repo 1.
#
# 3) https://github.com/earthly/earthly-example-proto-python-client
# This repository contains a client written in python along with an Earthfile
# that pulls in the auto-generated python code from repo 1.
#
# 4) https://github.com/earthly/earthly-example-proto-ruby-client
# This repository contains a client written in ruby along with an Earthfile
# that pulls in the auto-generated python code from repo 1.

# 5) finally, in this Earthfile, we pull in both the server and client docker
# images, and perform a basic integration test where we:
#   a) start up the server,
#   b) store the value "salmon" under the key "fish"
#   c) retrieve the stored value for "fish" and tests the returned value
#      is "salmon",
#   d) retrieves the stored value using the ruby client, and also tests
#      the returned value is "salmon".

test:
    FROM earthly/dind:alpine-3.19
    WITH DOCKER \
        --load kvserver:latest=github.com/earthly/earthly-example-proto-server:main+kvserver-docker \
        --load kv-py-client:latest=github.com/earthly/earthly-example-proto-python-client:main+kvclient-docker \
        --load kv-rb-client:latest=github.com/earthly/earthly-example-proto-ruby-client:main+kv-ruby-client-docker \
        --platform linux/amd64 # Ruby and Python(evidence suggests?) seem to have a hard time building in Docker on M1. https://github.com/grpc/grpc/issues/26664
        RUN --mount=type=cache,target=/go/pkg \
            docker run --name server --network=host -d kvserver:latest && \
            docker run --name client1 --network=host kv-py-client:latest python3 client.py fish=salmon && \
            docker run --name client2 --network=host kv-py-client:latest python3 client.py fish | grep salmon && \
            docker run --name client3 --network=host kv-rb-client:latest ruby client.rb fish | grep salmon
    END