Dockerfile.wasmclient

# For integration testing only.
#
# Builds the Tailscale control client (integration/wasmic/wasmclient) for
# GOOS=js/GOARCH=wasm and packages it with Go's wasm_exec Node runner. The
# container idles; the integration test execs
#   node /app/wasm_exec_node.js /app/client.wasm <control-url>
# to drive a real browser-style WebSocket GET against headscale's /ts2021,
# guarding the regression in issue #3357.

FROM golang:1.26.5-alpine AS build

WORKDIR /src

# Only the module metadata and the wasm client package are needed to build the
# js/wasm binary; its imports (tailscale.com/control/controlhttp, ...) resolve
# from the module proxy.
COPY go.mod go.sum ./
COPY integration/wasmic/wasmclient ./integration/wasmic/wasmclient

RUN GOOS=js GOARCH=wasm go build -o /out/client.wasm ./integration/wasmic/wasmclient \
    && cp "$(go env GOROOT)/lib/wasm/wasm_exec.js" /out/wasm_exec.js \
    && cp "$(go env GOROOT)/lib/wasm/wasm_exec_node.js" /out/wasm_exec_node.js

FROM node:24-alpine

WORKDIR /app
COPY --from=build /out/ /app/

# Idle; the test execs the client on demand with the headscale control URL.
ENTRYPOINT ["tail", "-f", "/dev/null"]