Fix realpath to do the right thing on all platforms #889
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jakepetroules
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This regressed as part of swiftlang#427, which attempted to simplify API calls in FSProxy to use Foundation rather than bespoke implementations going directly to Win32/POSIX API. However, `standardizingPath` on Windows doesn't actually handle 8.3 filenames correctly, and so Swift Build doesn't know (for example) that C:\Users\JAKEPE~1 and C:\Users\jakepetroules are the same path. Use the canonicalPathKey from URLResourceValues to canonicalize the path appropriately on both platforms, which under the hood uses GetFinalPathNameByHandleW on Windows and realpath on POSIX, matching the previous behavior. With this change, the androidCommandLineTool test now passes on Windows, which was previously failing due to differences between paths in 8.3 form vs long form.
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This regressed as part of #427, which attempted to simplify API calls in FSProxy to use Foundation rather than bespoke implementations going directly to Win32/POSIX API.
However,
standardizingPathon Windows doesn't actually handle 8.3 filenames correctly, and so Swift Build doesn't know (for example) that C:\Users\JAKEPE~1 and C:\Users\jakepetroules are the same path.Use the canonicalPathKey from URLResourceValues to canonicalize the path appropriately on both platforms, which under the hood uses GetFinalPathNameByHandleW on Windows and realpath on POSIX, matching the previous behavior.
With this change, the androidCommandLineTool test now passes on Windows, which was previously failing due to differences between paths in 8.3 form vs long form.