Convert package-lock.json or yarn.lock to deno.lock

[bartlomieju]

Discussed in #25814

^{Originally posted by alexgleason September 23, 2024}
I have a node project with a lot of dependencies that I will finally move to Deno for 2.0.

But Deno creates a new deno.lock from my package.json, essentially upgrading 180 packages at once.

I have a yarn.lock. I can convert between yarn.lock and package-lock.json. Can I convert either to deno.lock?

[bartlomieju]

This is currently not possible, but something we discussed internally and can happen after 2.0.

[alexgleason]

Looks like other tools do it by having the user create the node_modules from the old packager first, and then run the tool to generate the new lockfile from the existing node_modules: https://github.com/imsnif/synp

I thought maybe deno install should just do that if there's a node_modules and no deno.lock, but I saw pnpm has a dedicated pnpm import subcommand to achieve it.