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attrsum --version now prints the git tag or short commit. make build stamps it with -X from git describe, and the Dockerfile takes the VERSION build argument when given, otherwise git describe --tags --always on the .git in the build context, failing if .git is present and no version comes out. A new .dockerignore, the canonical one, keeps .git/config out of the context, and also this repo's host-built /attrsum. CI checks out full history so it sees the 1.0.0 tag and stamps what a full clone does. script/docker is replaced with the canonical copy. Model: opus-5-5
59 lines
2.1 KiB
Docker
59 lines
2.1 KiB
Docker
# Build stage
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# golang 1.25-alpine, 2026-02-28
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FROM golang@sha256:f6751d823c26342f9506c03797d2527668d095b0a15f1862cddb4d927a7a4ced AS builder
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RUN apk add --no-cache git make gcc musl-dev binutils-gold
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# golangci-lint v2.10.1
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RUN go install github.com/golangci/golangci-lint/v2/cmd/golangci-lint@5d1e709b7be35cb2025444e19de266b056b7b7ee
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# goimports v0.42.0
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RUN go install golang.org/x/tools/cmd/goimports@009367f5c17a8d4c45a961a3a509277190a9a6f0
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WORKDIR /src
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COPY go.mod go.sum ./
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RUN go mod download
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COPY . .
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# Run the checks as an unprivileged user. Root bypasses file mode bits, which
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# would make the permission tests (expecting EACCES on a 0000 file) spuriously
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# pass with no error. Caches live under /tmp (world-writable) so the user needs
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# no home directory of its own.
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ENV GOCACHE=/tmp/gocache
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ENV XDG_CACHE_HOME=/tmp/xdgcache
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RUN adduser -D -u 1000 builder && chown -R builder:builder /src /go
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USER builder
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# Run all checks - build fails if any check fails
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RUN make check
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# Build the binary (still as the unprivileged user: it owns /src, so git VCS
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# stamping sees consistent ownership).
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#
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# The version stamped into the binary: the VERSION build argument when one
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# is given, otherwise `git describe --tags --always` of the .git the build
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# context carries: the tag on a tagged commit, tag-N-gHASH on a commit after
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# one, the short commit when no tag is reachable. A context that carries .git
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# and still yields no version fails the build. With neither, as from a source
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# tarball, the binary reports dev.
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ARG VERSION
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RUN version="${VERSION:-$(git describe --tags --always)}"; \
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if [ -e .git ] && { [ -z "$version" ] || [ "$version" = dev ] || \
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[ "$version" = unknown ]; }; then \
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echo "version is '$version' although .git is present" >&2; \
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exit 1; \
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fi; \
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make build VERSION="${version:-dev}"
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# Runtime stage
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# alpine 3.21, 2026-02-28
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FROM alpine@sha256:c3f8e73fdb79deaebaa2037150150191b9dcbfba68b4a46d70103204c53f4709
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RUN apk add --no-cache ca-certificates tzdata
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WORKDIR /app
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COPY --from=builder /src/attrsum /app/attrsum
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ENTRYPOINT ["/app/attrsum"]
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