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fix(compiler-sfc): analyze export default by AST #7068

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merged 3 commits into from Mar 28, 2023
Merged

fix(compiler-sfc): analyze export default by AST #7068

merged 3 commits into from Mar 28, 2023

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sxzz
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@sxzz sxzz commented Nov 9, 2022

closes #7038, closes #7041, closes #7078

vite plugin PR vitejs/vite#10888


thanks to @btea

packages/compiler-sfc/src/rewriteDefault.ts Outdated Show resolved Hide resolved
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I think it's safer if we use as __VUE_DEFAULT__ in the else case (see highlighted line in the screenshot below).

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sxzz commented Nov 10, 2022

@znck Done.

@znck znck added 🔨 p3-minor-bug Priority 3: this fixes a bug, but is an edge case that only affects very specific usage. ready to merge The PR is ready to be merged. labels Nov 11, 2022
@sxzz sxzz added ready to merge The PR is ready to be merged. and removed ready to merge The PR is ready to be merged. labels Nov 11, 2022
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A problem with this approach: rewriteDefault is used in @vitejs/plugin-vue here, on the script string already transformed by compileScript. This means the string no longer matches the Node positions in the AST exposed on the SFC descriptor.

I think we need to do something similar to reactivity transform's transformAST:

  1. Accept both the AST and the corresponding MagicString instance in rewriteDefault
  2. Also expose the MagicString instance on the script block returned by compileScript
  3. In @vitejs/plugin-vue, feature detect by checking whether MagicString instance is available
  • If yes, use AST-based rewrite by passing in AST + MagicString
  • If no, fallback to old usage

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@sxzz did you end up re-creating vitejs/vite#10888 for https://github.com/vitejs/vite-plugin-vue?

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sxzz commented Mar 28, 2023

@yyx990803 No, I haven't done it yet.

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sxzz commented Mar 28, 2023

@yyx990803 yyx990803 merged commit 701b95f into vuejs:main Mar 28, 2023
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@sxzz sxzz deleted the fix/rewrite-default-ast branch March 28, 2023 03:59
IAmSSH pushed a commit to IAmSSH/core that referenced this pull request May 14, 2023
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🔨 p3-minor-bug Priority 3: this fixes a bug, but is an edge case that only affects very specific usage.
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