[lit-labs/compiler] Logic for compiling templates containing ChildParts #4047
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Note: This implementation has intentionally been simplified to make reviewing easier. Attribute part handling, uncompiled files, and many other subtleties have been skipped but will be added in followup.
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43081j
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Jul 26, 2023
43081j
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Jul 26, 2023
rictic
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rictic
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Jul 27, 2023
augustjk
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This was referenced Jul 27, 2023
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Issue: #189
RFC: lit/rfcs#21
Full prototype PR: #3984
Note to reviewer: Review this commit by commit – and skip reviewing
parse5-utilscause I deleted it after feedback from @43081j.Context
This PR splits out some initial compiler behavior from the full prototype PR in a reviewable chunk. This PR adds the core functionality that can be built upon in followup changes (and have been de-risked in the prototype).
Features
ChildParts. Other template parts such as attribute and element parts will be included in a followup.This is a private only change, and no public entrypoints are being added.
In my opinion, the best place to start the review is at the
CompiledTemplatePass.getTransformer()function which contains the high level flow of the transform:CompiledTemplatePassinstance.CompiledTemplates and replacinghtmltagged templates withCompiledTemplateResults.Testing
Tests are contained in the
test_filesdirectory. Each*.jsor*.tshas a compiled*.golden.jswhich can be generated vianpm run update-goldens, and contains the expected generated output.The test files included in this change are a subset of the tests in the prototype PR which pass with this change.
Risk
There is minimal risk to merging this PR if GitHub actions succeed. Risk is reduced because
lit-labs/compileris a private package and not published to NPM yet.Thank you