Adds support for parsing Yaml files #7300
Merged
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Summary
This PR adds support for Yarn to read Yaml files. This is needed because now that we switch to Yaml in Berry we need the Yarn v1 branch to parse the v2
.yarnrc
files out of the box (in order to makeyarn-path
work).Note that the Yaml support here is fickle and purely for reading (emitted files are still using the custom format). In particular, defining a lockfile using the Yaml syntax wouldn't work because the keys are not split on commas.
Ref yarnpkg/berry#183
Test plan
Added a test.