37 lines
1.9 KiB
Markdown
37 lines
1.9 KiB
Markdown
The `dist-raw` directory contains JS sources that are distributed verbatim, not compiled nor typechecked via TS.
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To implement ESM support, we unfortunately must duplicate some of node's built-in functionality that is not
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exposed via an API. We have copy-pasted the necessary code from https://github.com/nodejs/node/tree/master/lib
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then modified it to suite our needs.
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Formatting may be intentionally bad to keep the diff as small as possible, to make it easier to merge
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upstream changes and understand our modifications. For example, when we need to wrap node's source code
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in a factory function, we will not indent the function body, to avoid whitespace changes in the diff.
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One obvious problem with this approach: the code has been pulled from one version of node, whereas users of ts-node
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run multiple versions of node.
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Users running node 12 may see that ts-node behaves like node 14, for example.
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## `raw` directory
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Within the `raw` directory, we keep unmodified copies of the node source files. This allows us to use diffing tools to
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compare files in `raw` to those in `dist-raw`, which will highlight all of the changes we have made. Hopefully, these
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changes are as minimal as possible.
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## Naming convention
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Not used consistently, but the idea is:
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`node-<directory>(...-<directory>)-<filename>.js`
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`node-internal-errors.js` -> `github.com/nodejs/node/blob/TAG/lib/internal/errors.js`
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So, take the path within node's `lib/` directory, and replace slashes with hyphens.
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In the `raw` directory, files are suffixed with the version number or revision from which
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they were downloaded.
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If they have a `stripped` suffix, this means they have large chunks of code deleted, but no other modifications.
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This is useful when diffing. Sometimes our `dist-raw` files only have a small part of a much larger node source file.
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It is easier to diff `raw/*-stripped.js` against `dist-raw/*.js`.
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