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8e580375e1
* fix: add `realpath` to host to properly resolve monorepos
- tested this in a pnpm repo with symlinked deps and it worked there,
so I believe this fixes all pnpm issues
- it may also fix some Lerna issues if they were due to symlinks, but
I didn't check those
- not sure about others, e.g. Rush, Yarn workspaces, Yarn PnP
- I figured out this was needed by staring at the TS source code and
then I found this line:
67673f324d/src/compiler/moduleNameResolver.ts (L1412)
- it expects `host.realpath` to be implemented for TS's `realPath` to
work correctly, otherwise it just returns the path with no
transformation (i.e. the path to the symlink instead of the
realpath)
- this is not documented _anywhere_ and we were hitting this when
calling `getEmitOutput`, before even using `moduleNameResolver`
- so I just tried implementing it... and it worked!
- notably, the other Rollup TS plugins don't implement this either???
- not sure how they don't error on this??
- note that I added a `!` as `realpath` doesn't have to be implemented
on `ts.sys`... but it is in the default implementation (see comment)
- I originally had a ternary with `fs.realpathSync` if it didn't exist
but that is literally what the default implementation uses
- can add this back in the future if it becomes an issue
* fix realpath test on windows