Fix #1266, make SourceCode only for no-deprecated rule #1271
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src/ExportMap.js
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| @@ -346,7 +348,7 @@ ExportMap.parse = function (path, content, context) { | |||
| docStyleParsers[style] = availableDocStyleParsers[style] | |||
| }) | |||
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| const source = makeSourceCode(content, ast) | |||
| const source = context.id === 'no-deprecated' ? makeSourceCode(content, ast) : null | |||
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Is there a way to make this metadata the rule can supply rather than hardcoding a single rule name?
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yeah, I'll take a look
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@ljharb It seems metadata doesn't provide an appropriate field: https://eslint.org/docs/developer-guide/working-with-rules#rule-basics
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perhaps an argument passed to ExportMap?
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Passing an argument looks better, it seems rule id isn't passed in ESlint 2-3.
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but more changes are required... 😓
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maybe instead of skipping the comments, we could make them lazy?
ie, instead of using properties, use functions that lazily create the source code object as needed (but memoize it across calls)?
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I'm afraid it's too late, we don't have required data (content, ast) when we need it, otherwise we have to store them as well
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@ljharb any ideas regarding I think I've already seen this in other PRs... |
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Closing in deference to #1275 |
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Thanks for taking a stab at this, though! 😄 |
Parsing source code allocates a lot of memory since
SourceCodeinstances are built recursively for each node in the dependency graph:https://github.com/benmosher/eslint-plugin-import/blob/1ec80fa35fa1819e2d35a70e68fb6a149fb57c5e/src/ExportMap.js#L349
SourceCodeinstance is only used to capture docs from leading comments that are actually used only for no-deprecated rule:https://github.com/benmosher/eslint-plugin-import/blob/1ec80fa35fa1819e2d35a70e68fb6a149fb57c5e/src/ExportMap.js#L417-L418
https://github.com/benmosher/eslint-plugin-import/blob/1ec80fa35fa1819e2d35a70e68fb6a149fb57c5e/src/ExportMap.js#L453-L454
https://github.com/benmosher/eslint-plugin-import/blob/1ec80fa35fa1819e2d35a70e68fb6a149fb57c5e/src/ExportMap.js#L456-L459
However,
SourceCodeinstances are built even if no-deprecated rule is turned off (btw the rule is in Stage 0 and is still work in progress). The PR prevents negative impact on other rules.Here's memory consumption before/after PR for pretty large code base, no-deprecated rule is disabled for both cases:
The 1st process failed with
heap out of memoryerror.