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⚡ Cross-compile go install tools to eliminate QEMU build hang ⚡

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The arm64 build was stuck for 12+ hours compiling gopls, dlv, and other
Go tools from source under QEMU user-mode emulation. QEMU makes Go
compilation 20-50× slower than native; gopls alone can take hours.
Fix: add a --platform=$BUILDPLATFORM go-tools stage in the Dockerfile that
cross-compiles all go install tools natively on amd64 using Go's built-in
cross-compilation (GOOS=linux GOARCH=$TARGETARCH). The binaries are then
COPYed into the main build stage before 05-custom.sh runs. No QEMU is
involved for any compilation step.
- Dockerfile: add go-tools stage using --platform=$BUILDPLATFORM with golang:alpine;
cross-compiles goimports, stringer, gopls, govulncheck, dlv, gops, benchstat,
wire, mockgen, protoc-gen-go, protoc-gen-go-grpc; COPY /go/bin/ → /usr/local/bin/
before the 05-custom.sh RUN layer
- rootfs/root/docker/setup/05-custom.sh: remove all go install commands (11 tools
now provided by the Dockerfile stage); keep go clean -modcache/-cache cleanup

Dockerfile
rootfs/root/docker/setup/05-custom.sh
This commit is contained in:
Jason Hempstead
2026-06-21 09:43:14 -04:00
parent d023bdba06
commit d2e92d12b2
2 changed files with 26 additions and 39 deletions
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rootfs/root/docker/setup/05-custom.sh
+4 -39
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@@ -191,45 +191,10 @@ _install_bin \
"https://github.com/pressly/goose/releases/download/${_GOOSE_VER}/goose_linux_${_ARCH_GLIBC}" \
"goose"
# - - - - - - - - - - - - - - - - - - - - - - - - -
# go install for tools without standalone release binaries
echo "Installing Go tooling via go install"
# Import organiser — superset of gofmt that also manages import groups
go install golang.org/x/tools/cmd/goimports@latest
# Generate String() methods for iota-based types
go install golang.org/x/tools/cmd/stringer@latest
# Official Go language server (no binary releases; must compile)
go install golang.org/x/tools/gopls@latest
# Vulnerability scanner against the Go vulnerability database
go install golang.org/x/vuln/cmd/govulncheck@latest
# Source-level debugger
go install github.com/go-delve/delve/cmd/dlv@latest
# Live process diagnostics: list Go processes, dump stacks, force GC
go install github.com/google/gops@latest
# Benchmark comparison — statistically sound diff of pprof benchmark runs
go install golang.org/x/perf/cmd/benchstat@latest
# Compile-time dependency injection code generator
go install github.com/google/wire/cmd/wire@latest
# Mock generator for interfaces (Uber fork of golang/mock)
go install go.uber.org/mock/mockgen@latest
# protobuf Go code generator
go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
# gRPC Go code generator
go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
echo "Go tooling installed"
# go install tools (goimports, stringer, gopls, govulncheck, dlv, gops, benchstat,
# wire, mockgen, protoc-gen-go, protoc-gen-go-grpc) are cross-compiled natively on
# the build platform in the Dockerfile go-tools stage and copied to /usr/local/bin
# before this script runs — no QEMU-emulated compilation needed here.
# Strip the module download cache and ephemeral build cache from this layer
go clean -modcache