[layers]Test against head.

[lina128]

This change is 

[nsthorat]

Reviewed 5 of 5 files at r1.
Reviewable status: complete! 1 of 1 approvals obtained (waiting on @caisq, @dsmilkov, @nsthorat, and @pyu10055)

[dsmilkov]

A suggestion: to defend against publishing layers with a linked core package, we should have build-npm.sh check that "@tensorflow/tfjs-core": points to a version and not "link:../tfjs-core" . Likewise for the other build-npm.sh scripts in the other packages.

[nsthorat]

This is a reasonable suggestion for extra safety but in practice this won’t happen because of the release script :)

[lina128]

The release script makes sure it uses a pinned version. But yes, it can't prevent link leak to npm if package is released manually. I will add the safe guard in another PR.

[nsthorat]

One thing I forgot about, you need to do something like this: https://github.com/tensorflow/tfjs/blob/master/tfjs-backend-wasm/package.json#L23

This script runs every time we build (or do anything for development) to make sure that when developing we're reverting the changes of the version pinning of the release script back to link:../. You should put the link script in top-level of the union package because it can be shared by all packages.

[lina128]

One thing I forgot about, you need to do something like this: https://github.com/tensorflow/tfjs/blob/master/tfjs-backend-wasm/package.json#L23

This script runs every time we build (or do anything for development) to make sure that when developing we're reverting the changes of the version pinning of the release script back to link:../. You should put the link script in top-level of the union package because it can be shared by all packages.

Exactly, I noticed that too. Created another PR for that: #2834