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[5.6] TSCBasic: rework relative path construction on Windows (#298) #308

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Merged
merged 1 commit into from
Apr 4, 2022
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[5.6] TSCBasic: rework relative path construction on Windows (#298) #308

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22 changes: 22 additions & 0 deletions Sources/TSCBasic/Path.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -75,7 +75,29 @@ public struct AbsolutePath: Hashable {
if PathImpl(string: str).isAbsolute {
self.init(str)
} else {
#if os(Windows)
var joined: PWSTR!
_ = basePath._impl.string.withCString(encodedAs: UTF16.self) { base in
str.withCString(encodedAs: UTF16.self) { path in
PathAllocCombine(base, path, ULONG(PATHCCH_ALLOW_LONG_PATHS.rawValue), &joined)
}
}
defer { LocalFree(joined) }

let buffer: UnsafePointer<Int8> =
String(decodingCString: joined, as: UTF16.self).fileSystemRepresentation
defer { buffer.deallocate() }

var canonical: PWSTR!
_ = String(cString: buffer).withCString(encodedAs: UTF16.self) {
PathAllocCanonicalize($0, ULONG(PATHCCH_ALLOW_LONG_PATHS.rawValue), &canonical)
}
defer { LocalFree(canonical) }

self.init(String(decodingCString: canonical, as: UTF16.self))
#else
self.init(basePath, RelativePath(str))
#endif
}
}

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