Tutorial fails to build

[narthur157]

https://open-match.dev/site/docs/tutorials/matchmaker101/frontend/
https://github.com/googleforgames/open-match/tree/main/tutorials/matchmaker101/frontend

docker build -t $REGISTRY/mm101-tutorial-frontend frontend/ does not succeeed

I can build the project just fine with go build ., which makes sense to me
What doesn't make sense is how this could compile given the relative path specification ../../../ in go.mod to the local open-match module which is not included in the Dockerfile

That being said I'm a complete beginner with Go, so possibly there is some basic Go concept I am missing here

docker build -t $REGISTRY/mm101-tutorial-frontend frontend/
[+] Building 11.7s (8/8) FINISHED
=> [internal] load build definition from Dockerfile                                                               0.0s  
=> => transferring dockerfile: 32B                                                                                0.0s  
=> [internal] load .dockerignore                                                                                  0.0s  
=> => transferring context: 2B                                                                                    0.0s  
=> [internal] load metadata for docker.io/library/golang:alpine                                                  10.6s  
=> [1/4] FROM docker.io/library/golang:alpine@sha256:42d35674864fbb577594b60b84ddfba1be52b4d4298c961b46ba95e9fb4  0.0s  
=> [internal] load build context                                                                                  0.0s  
=> => transferring context: 203B                                                                                  0.0s  
=> CACHED [2/4] WORKDIR /app                                                                                      0.0s  
=> CACHED [3/4] COPY . .                                                                                          0.0s  
=> ERROR [4/4] RUN go build -o frontend .                                                                         1.0s
 ------                                                                                                                   > 
[4/4] RUN go build -o frontend .:                                                                                    
#7 0.674 go: open-match.dev/open-match@v0.0.0-dev (replaced by ../../../): reading /go.mod: open /go.mod: no such file or directory                                                                                                             #7 0.674 go: downloading google.golang.org/grpc v1.36.0                                                                 
#7 0.960 go: open-match.dev/open-match@v0.0.0-dev (replaced by ../../../): reading /go.mod: open /go.mod: no such file or directory                                                                                                             ------                                                                                                                  
executor failed running [/bin/sh -c go build -o frontend .]: exit code: 1  

[mridulji]

Hi @narthur157, Please try making below changes in dockerfiles. you may also put latest in place of v1.3.0.

[narthur157]

Hi @narthur157, Please try making below changes in dockerfiles. you may also put latest in place of v1.3.0.

This is what I needed! Although I did have to add RUN apk add --no-cache git because the alpine image doesn't include git

FROM golang:alpine as go
WORKDIR /app
ENV GO111MODULE=on
RUN apk add --no-cache git
COPY . .
RUN go mod edit -replace open-match.dev/open-match@v0.0.0-dev=open-match.dev/open-match@v1.3.0
RUN go mod tidy
RUN go build -o frontend .

CMD ["/app/frontend"]

This is what worked for me here