Preserve used imports when interoperating with transform-typescript#32
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Preserve used imports when interoperating with transform-typescript#32
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`@babel/plugin-transform-typescript` removes unused imports because it assumes they're types (yuck). That's how TS behaves so it's at least understandable. However, it doesn't seem to respect the fact that our plugin is *emitting* code that *will* use the imports. This adds a failing test.
Builds off #31 to fix #30. Instead of keeping *everything* as in #31 (which is not safe in general), we use the `pre` to take a snapshot of available imports and then only when we discover that a template wants to use a name that is not in scope do we check if it was in the original set of available imports and reintroduce an import for it.
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I confirmed locally that this PR fixes ember-cli/ember-template-imports#211 |
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Does this also work with amd transform? Would be good to have a test for it too . Btw, thanks for basing this on my pr. Much appreciated. if this works well, also with AMD transform, then this is better |
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I also saw now that amd transform runs an program:exit |
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Builds off #31 to fix #30.
Instead of keeping everything as in #31 (which is not safe in general), we use the
preto take a snapshot of available imports and then only when we discover that a template wants to use a name that is not in scope do we check if it was in the original set of available imports and reintroduce an import for it.