briancoyner

import AsyncAlgorithms

/// Prior to Xcode 14.3.0 (Swift 5.8), the `XCTest/XCTestExpectation` was not `Sendable`, and therefore considered
/// unsafe to use across threads. But starting with Xcode 14.3.0, `XCTestExpectation` is now `Sendable` and therefore
/// can be used to signal across threads. Thus making this "Semaphore" no longer needed for asynchronous unit tests that
/// need a way to coordinate progress between different actors/ threads. 
struct Semaphore: Sendable {
    private let channel = AsyncChannel(element: Void.self)
}

briancoyner

Collection of Xcode build issues and workarounds

Xcode 7.3 dYSM Hash Mismatch

• Overview
  • project contains a mix of static libraries (31) and embedded frameworks (8)
  • project is "old" (i.e. originally created in 2012; been migrating as needed)
• Seeing this error:
  "hash mismatch: this object file was built against a different version of the module"
• Interesting link: http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20150921/301239.html

briancoyner

# Verify SHA-256 Checksum (OS X)
openssl dgst -sha256 "/path/to/file"

# Verify SHA-1 Checksum (OS X)
openssl dgst -sha1 "/path/to/file"