Chris Bracken f5b84d2125 [et] Simplify path canonicalisation logic (flutter/engine#52275)
In order to canonicalise paths, previously we were doing an iterative
computation to resolve symlinks to a canonical path, directory by
directory. This was because on macOS and other BSDs, readlink doesn't
support the `-f` (follow symlinks) option. However, macOS and other
BSD-based systems *do* bundle the `realpath` utility, which resolves
symlinks.

This patch is stacked on top of #52274 and is the second commit
(dec38dda38d1ef0bc3a548ef1f750c5855e9d9f4).

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2024-04-19 19:21:58 -07:00
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