Add pkg/transform: public library for running transforms - #224
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Exposes Run(ctx, source, entities, opts) which compiles TS/JS via esbuild,
executes transform_entities() in goja with the same host functions and JS
helpers the production hub registers, and returns entities + captured logs.
Self-contained — no dependency on internal/* — so external consumers can
import it without pulling in CLI internals. The existing mim transform test
command continues to use internal/transform/ unchanged.
Notable details:
- esbuild Transform output has top-level import/export stripped before
handing to goja, since goja treats them as reserved-word syntax errors.
- `import * as dh from "datahub-tslib"` namespace aliases are resolved by
emitting a shim object that binds every host fn + helper as a property.
- Result.Logs/Entities are always non-nil so JSON marshals to `[]` not
`null` for downstream JS consumers.
- ctx cancellation and Options.Timeout both interrupt long-running scripts
via engine.Interrupt
erik-heggenhougen
approved these changes
Apr 27, 2026
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Exposes Run(ctx, source, entities, opts) which compiles TS/JS via esbuild,
executes transform_entities() in goja with the same host functions and JS
helpers the production hub registers, and returns entities + captured logs.
Self-contained — no dependency on internal/* — so external consumers can
import it without pulling in CLI internals. The existing mim transform test
command continues to use internal/transform/ unchanged.
Notable details:
import * as dh from "datahub-tslib"namespace aliases are resolved by emitting a shim object that binds every host fn + helper as a property.[]notnullfor downstream JS consumers.