Pete Bacon Darwin 0a8e8cd1f3 feat(ngcc): implement source-map flattening (#35132) ...

The library used by ngcc to update the source files (MagicString) is able
to generate a source-map but it is not able to account for any previous
source-map that the input text is already associated with.

There have been various attempts to fix this but none have been very
successful, since it is not a trivial problem to solve.

This commit contains a novel approach that is able to load up a tree of
source-files connected by source-maps and flatten them down into a single
source-map that maps directly from the final generated file to the original
sources referenced by the intermediate source-maps.

PR Close #35132

2020-02-26 12:51:36 -08:00

1.4 KiB

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