Don't require isomorphic-fetch in environments with fetch

[birtles]

Requiring isomorphic-fetch swells the size of any packages / Lambdas using libsql by over 100%.

For example, here is the breakdown of a very simple Lambda using @libsql/client:

Looking at how these are related:

i.e. the primary dependencies introduced by isomorphic-fetch include:

Dependency	Size
isomorphic-fetch (including node-fetch)	38.3Kb
whatwg-url (required by isomorphic-fetch via node-fetch)	45.1Kb
tr46 (required by whatwg-url)	294.3Kb
TOTAL	377.7Kb
Percent of node_modules	58.94%

I wonder what environments still need node-fetch anyway? Node 16 has been EOL'ed so Node can be assumed to have native fetch and I believe all versions of Deno and Bun have native fetch too.

Given the API already allows providing a fetch function, would it be possible to assume a native fetch and allow environments that don't have native fetch (or have a deficient/buggy version) to pass in isomorphic-fetch or somesuch as needed rather than have all users pay the cost of node-fetch and friends?

[penberg]

@birtles I would love to just assume native fetch() but I think we got bitten by it so many times that I am now afraid to do it... 🙈

[janpio]

How others do it: https://github.com/planetscale/database-js#custom-fetch-function

[birtles]

@birtles I would love to just assume native fetch() but I think we got bitten by it so many times that I am now afraid to do it... 🙈

Yeah, fair enough. I suppose doing a major version bump to align with PlanetScale (i.e. the breaking change is that you must supply a fetch implementation if there's no native one) is one possibility?

[birtles]

For what it's worth, supplying native fetch to the createClient constructor doesn't seem to work for me. I get:

{
    "errorType": "TypeError",
    "errorMessage": "Failed to parse URL from [object Request]",
    "stack": [
        "TypeError: Failed to parse URL from [object Request]",
        "    at Object.fetch (node:internal/deps/undici/undici:11576:11)"
    ]
}

My best guess is that because the Request object used inside the hrana client is from node-fetch and hence it fails the brand checks inside the native fetch. (At least that's how it would work in browsers, not sure about the node implementation.)

[DaBigBlob]

@birtles i was facing the same/similar issue. so i wrote a thin client for a large subset of hrana http api v3: https://github.com/DaBigBlob/libsql-stateless

[birtles]

@birtles i was facing the same/similar issue. so i wrote a thin client for a large subset of hrana http api v3: https://github.com/DaBigBlob/libsql-stateless

@DaBigBlob Looks very interesting! Unfortunately I don't think I could use GPL 2.0 code for this particular project. Furthermore, for the main Lambda I was trying to optimize I switched to Rust due to #110.

[DaBigBlob]

@DaBigBlob Looks very interesting! Unfortunately I don't think I could use GPL 2.0 code for this particular project. Furthermore, for the main Lambda I was trying to optimize I switched to Rust due to #110.

@birtles idk why i chose gpl2 lol. its mit now.