# Lint image — runs golangci-lint inside a container so every lint uses
# the pinned linter, never a host binary. Linting is a build step, so a
# successful build is a clean lint. Built by script/lint.
# golangci/golangci-lint:v2.12.2 (Debian-based), 2026-08-07
FROM golangci/golangci-lint:v2.12.2@sha256:5cceeef04e53efe1470638d4b4b4f5ceefd574955ab3941b2d9a68a8c9ad5240

WORKDIR /src

COPY go.mod go.sum ./
RUN go mod download

COPY . .

# Caching is waived for linting: on an unchanged tree a cached build runs
# no linter and still exits 0 in under a second. script/lint passes a
# fresh GATE_RUN every time, and referencing it here forces this step to
# re-run, so the linter always executes.
#
# `golangci-lint config verify` is deliberately NOT run: it fetches its
# JSON schema over an unpinned live HTTPS call, which REPO_POLICIES.md
# forbids (all external references must be pinned by hash).
ARG GATE_RUN
RUN echo "lint run: ${GATE_RUN}"; golangci-lint run --config .golangci.yml ./...