Dockerfile

FROM --platform=${BUILDPLATFORM} golang:1.22 AS base
WORKDIR /src
ENV CGO_ENABLED=0
COPY go.* .
RUN --mount=type=cache,target=/go/pkg/mod \
    go mod download

FROM base AS build
ARG TARGETOS
ARG TARGETARCH
RUN --mount=target=. \
    --mount=type=cache,target=/go/pkg/mod \
    --mount=type=cache,target=/root/.cache/go-build \
    GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o /out/opener .

FROM base AS test
RUN --mount=target=. \
    --mount=type=cache,target=/go/pkg/mod \
    --mount=type=cache,target=/root/.cache/go-build \
    go test -v ./...

FROM golangci/golangci-lint:v1.59.1 AS lint-base
FROM base AS lint
RUN --mount=target=. \
    --mount=from=lint-base,src=/usr/bin/golangci-lint,target=/usr/bin/golangci-lint \
    --mount=type=cache,target=/go/pkg/mod \
    --mount=type=cache,target=/root/.cache/go-build \
    --mount=type=cache,target=/root/.cache/golangci-lint \
    go vet ./... && \
    go fmt ./... && \
    golangci-lint run

FROM scratch AS bin-unix
COPY --from=build /out/opener /

FROM bin-unix AS bin-linux
FROM bin-unix AS bin-darwin

FROM bin-${TARGETOS} as bin