Lerna error: cannot find module during CI build

user_9291594 0
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I have a monorepo using Lerna that I trying to build with Gitlab CI. Running lerna run build locally builds everything successfully.

The Dockerfile that Gitlab tries to execute looks a bit like this:

FROM node:16 AS common
WORKDIR /usr/src/app
RUN yarn global add lerna
COPY . . 

RUN lerna bootstrap --include-dependencies
RUN lerna link

RUN yarn

# yarn build === lerna run build
RUN yarn build

Which results in the following errors:

Cannot find module '@project/common' or its corresponding type declarations.
import { SomeClass } from '@project/common';

Is there any step I am missing? Thanks in advance!

lerna gitlab continuous-integration javascript
2 Answers

What version of lerna is being used locally? Amend your question to include the output of learna info.

yarn global add learna will install the latest version, which currently is v4.0.0.

user_26756700

I was able to fix this issue by changing the Dockerfile. Running yarn before running lerna bootstrap and removing yarn build resolved the errors.

My Dockerfile now looks like this:

FROM node:16 AS common
WORKDIR /usr/src/app
RUN yarn global add lerna
COPY . . 

RUN yarn
RUN lerna bootstrap --include-dependencies

I can definitely attribute the errors to my limited knowledge of Lerna, but I hope this answer can still help others with similar issues.

user_92915940
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