metro-minify-terser: Don't mutate input options #929
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Summary: Mitigates terser/terser#1341 Terser sets properties inlcuding `source_map` and `_destroy_ast` on the given `options.output` (or `options.format`) object, which can affect subsequent calls where we re-use the same config object. Here we take a shallow copy of the given configuration, so `terser` doesn't mutate `metro-minify-terser`'s input. Changelog: [Fix] Mitigate potential source map mismatches with concurrent transformations (Terser [#1341](terser/terser#1341)) Reviewed By: jacdebug, motiz88 Differential Revision: D43362977 fbshipit-source-id: 019f417aa8cc7897c71a6ab2c7db5d0cf916e59d
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Summary:
Mitigates terser/terser#1341
Terser sets properties inlcuding
source_mapand_destroy_aston the givenoptions.output(oroptions.format) object, which can affect subsequent calls where we re-use the same config object.Here we take a shallow copy of the given configuration, so
terserdoesn't mutatemetro-minify-terser's input.Changelog: [Fix] Mitigate potential source map mismatches with concurrent transformations (Terser #1341)
Reviewed By: jacdebug, motiz88
Differential Revision: D43362977