# Lint stage: format check + golangci-lint
# golangci/golangci-lint:v2.12.2 (Debian-based), 2026-08-07
FROM golangci/golangci-lint:v2.12.2@sha256:5cceeef04e53efe1470638d4b4b4f5ceefd574955ab3941b2d9a68a8c9ad5240 AS lint
WORKDIR /src
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN make fmt-check
# Called directly: make lint is itself a docker build of this stage.
RUN golangci-lint run --config .golangci.yml ./...

# Test stage: run full test suite under the race detector
# golang 1.22.12 (Debian-based; -race needs its C toolchain), 2025-02-04
FROM golang@sha256:1cf6c45ba39db9fd6db16922041d074a63c935556a05c5ccb62d181034df7f02 AS test
WORKDIR /src
COPY go.mod go.sum ./
RUN go mod download
COPY . .
# Called directly: make test is itself a docker build of this stage.
RUN go test -timeout 90s -race -cover ./... || \
    { echo "--- Rerunning with -v for details ---"; \
      go test -timeout 90s -race -v ./...; exit 1; }

# Final stage: the copies make a plain docker build run both stages above.
# golang 1.22.12 (2025-02-04)
FROM golang@sha256:1cf6c45ba39db9fd6db16922041d074a63c935556a05c5ccb62d181034df7f02
COPY --from=lint /src/go.sum /dev/null
COPY --from=test /src/go.sum /dev/null