react-router build fails silently inside Docker — how to make it more verbose?

[wovalle]

First of all, big fan of the framework!

I'm using RR7 in framework mode. I recently did a huge refactor at my company, and now the Docker image doesn't build anymore. I can build the project locally just fine.

The error I get when building the image is the following:

ERROR: failed to build: failed to solve: failed to compute cache key: failed to calculate checksum of ref 03c786d3-d159-44ac-86ff-69db2f351893::nc2d70csnq1rd8oubcsjapxnl: “/myapp/build”: not found

Which means /myapp/build wasn't found — in other words, the react-router build command failed.

However, react-router build doesn’t throw any errors; it just fails silently:

#17 [build 7/8] RUN npm run build
#17 0.291
#17 0.291 > build
#17 0.291 > run-s build:*
#17 0.291
#17 0.388
#17 0.388 > build:remix
#17 0.388 > react-router build
#17 0.388
#17 DONE 0.8s

Given the size of the project, I’m 100% confident it shouldn’t complete in just 0.8 seconds.

The react-router build documentation mentions a --logLevel or -l parameter, which I set to "info", but I still don’t see any additional output. Neither react-router build --logLevel "info" or react-router build -l "info" produced a different input.

How can I make the CLI more verbose so I can better debug what’s happening?

[wovalle]

My specific problem was a mixture of legacy-peer-deps=true, some dependencies failing to properly install and monorepo tooling.