Is there a way to include a lockfile in a docker container as an optional step?

Question

Is there a way to include a lockfile in a docker container as an optional step?

I am attempting to create a docker image that can optionally incorporate a yarn or npm lockfile during the build process. I want to include it explicitly, but also ensure that the build does not fail if the lockfile is missing.

The goal is to respect deterministic build processes used by hosted applications without enforcing them. Additionally, I aim to allow applications to utilize this container for establishing deterministic builds.

Below is my initial setup:

FROM node:8.12.0-alpine
USER node
WORKDIR ${my_workdir}
COPY --chown=node:node src/yarn.lock ./
COPY --chown=node:node src/package*.json ./
RUN yarn && yarn cache clean
COPY --chown=node:node src/ .
CMD []

Is there a specific command or option I could implement instead of 'copy' that will not cause an error if the 'src/yarn.lock' file is missing from the filesystem?

javascript docker npm yarnpkg lockfile

Answer 1

Answer №1

If you're encountering issues with the COPY command failing, one possible solution is to include the yarn.lock file as yarn.lock* alongside another file. Here's an example of how you can modify your Dockerfile to address this issue:

FROM node:8.12.0-alpine
USER node
WORKDIR ${my_workdir}
COPY --chown=node:node src/package*.json src/yarn.lock* ./
RUN yarn && yarn cache clean
COPY --chown=node:node src/ .
CMD []

I hope this suggestion proves helpful!

Answer 2

If you're encountering issues with the COPY command failing, one possible solution is to include the yarn.lock file as yarn.lock* alongside another file. Here's an example of how you can modify your Dockerfile to address this issue:

FROM node:8.12.0-alpine
USER node
WORKDIR ${my_workdir}
COPY --chown=node:node src/package*.json src/yarn.lock* ./
RUN yarn && yarn cache clean
COPY --chown=node:node src/ .
CMD []

I hope this suggestion proves helpful!

Is there a way to include a lockfile in a docker container as an optional step?

Answer №1

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