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Pete Bacon Darwin df816c9c80 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 12:51:35 -08:00
..
src feat(ngcc): implement source-map flattening (#35132) 2020-02-26 12:51:35 -08:00
test feat(ngcc): implement source-map flattening (#35132) 2020-02-26 12:51:35 -08:00
BUILD.bazel feat(ngcc): implement source-map flattening (#35132) 2020-02-26 12:51:35 -08:00
README.md refactor(ivy): move ngcc into a higher level folder (#29092) 2019-03-20 14:45:54 -04:00
index.ts refactor(ngcc): add support for asynchronous execution (#32427) 2019-09-09 15:55:13 -04:00
main-ivy-ngcc.ts fix(ngcc): rename the executable from `ivy-ngcc` to `ngcc` (#33140) 2019-10-14 16:29:14 +00:00
main-ngcc.ts fix(ngcc): render legacy i18n message ids by default (#34135) 2019-12-03 10:15:53 -08:00

README.md

Angular Compatibility Compiler (ngcc)

This compiler will convert node_modules compiled with ngc, into node_modules which appear to have been compiled with ngtsc.

This conversion will allow such "legacy" packages to be used by the Ivy rendering engine.

Building

The project is built using Bazel:

yarn bazel build //packages/compiler-cli/ngcc

Unit Testing

The unit tests are built and run using Bazel:

yarn bazel test //packages/compiler-cli/ngcc/test

Integration Testing

There are tests that check the behavior of the overall executable:

yarn bazel test //packages/compiler-cli/ngcc/test:integration