20.18.6 does not build all stages anymore

[gzm0]

The trigger is almost certainly #465 which upgraded Docker 20.10.14 -> 27.3.1. This switched to buildkit by default, which in turn changes the stage execution behavior.

This can be devastating to pipelines running tests in a separate stage:

FROM node:23.6.0@sha256:<something> AS base
FROM base AS build

COPY package.json .
COPY src .
RUN npm install
RUN npm build

FROM build AS tests

# After the upgrade to 20.18.6, these two commands to not run anymore.
COPY tests .
RUN npm test

FROM base AS image

COPY --from=build dist .

CMD ["dist/index.js"]

[jwetzell]

Not sure I would have realized that bumping a patch version from 20.18.4 -> 20.18.6 would have jumped 7?! major versions of docker