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(feat) support ESM configs #930

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merged 10 commits into from
Apr 6, 2021

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dummdidumm
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@dummdidumm dummdidumm commented Mar 31, 2021

With this PR config loading switches to using dynamic import statements. The PR consists of

  • rework of the config loader to make sure to not load the same config twice in parallel, and to load all possible sub-svelte-configs upon tsconfig initialization, so that all configs are available synchronously to all snapshots that are retrieved. throwing out cosmiconfig in that process.
  • resulting tedious make this function async modifications since the ts service initialization is now async
    Support ESM Syntax in config files #509

Simon Holthausen added 3 commits March 31, 2021 19:06
@dummdidumm dummdidumm marked this pull request as ready for review April 1, 2021 14:24
@jasonlyu123
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I'll take a look next week.

@dummdidumm dummdidumm merged commit 78df663 into sveltejs:master Apr 6, 2021
@dummdidumm dummdidumm deleted the async-config-loader branch April 6, 2021 14:14
dummdidumm added a commit that referenced this pull request Apr 7, 2021
Node versions prior to v12.17 need the `--experimental-modules` flag or the dynamic import introduced in #930 won't work. This node version is used in VS Code versions prior to 1.55 and could be used by users setting the node executable to a node version below 12.17.

Remove this in mid 2022 and bump vs code minimum required version to 1.55
@ryanfiller
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ryanfiller commented Apr 8, 2021

This is the greatest PR I've ever seen in my life (well, in the last month anyways). Any idea what release this will be a part of? It doesn't look like this is working yet as of 1.0.0-next.71.

@dummdidumm
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I think SvelteKit is hardcoded to using svelte.config.cjs . I wanted to wait a little for possible "this broke" feedback before proceeding with a PR over at SvelteKit

@ryanfiller
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Ah, gotcha. I was linked to this PR from the Discord and didn't pay attention to what repo this is in. Either way, super great work! I hope this is able to land in Kit eventually, it would make my life (and hopefully other's) a LOT easier.

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3 participants