FROM golang:1.17.2-alpine3.14 as builder
RUN apk update && apk add --no-cache git tzdata
WORKDIR /src

COPY go.mod go.sum /src/
RUN go mod download
COPY . .
RUN VERSION=$(git describe --tags --abbrev=0) BUILD=$(git rev-parse --short HEAD) && \
    GOOS=linux GOARCH=amd64 \
    go build -ldflags "-X main.Version=${VERSION} -X main.Build=${BUILD} -w" \
    -o /go/bin/breacher

FROM alpine:3.14
ENV PATH="/go/bin:${PATH}"
COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
COPY --from=builder /go/bin/breacher /go/bin/breacher
ENTRYPOINT ["/go/bin/breacher"]