Die, μ-framework to exit swift scripts

Usage

Calling die() or die("Oh no!") prints the name of the file, the location of the error and the optional message and calls exit(EXIT_FAILURE) afterwards. There also are multiple convenience functions to work with throwing functions:

dieOnThrow {
    try maybeThrowingFunction(["Please", "don't", "throw"])
}

Or using the message parameter to supply a failure reason:

dieOnThrow("Failed to compute the answer") {
    guard someValue == 42 else { throw SomeError }
}

And for working with throwing functions and using the result:

let contents = dieOnThrow("Unable to get the contents of \(someURL)") {
    let contents = try fm.contentsOfDirectoryAtURL(someURL, includingPropertiesForKeys: nil, options: [])
    // Do more stuff...
    return contents
}

Additionaly there are functions to die in case an expression evaluates to nil, or not to nil:

let result = dieIfNil(someObject.methodThatMightReturnNil())
dieIfNotNil(someObject.methodThatReturnsAnError())

As well as for true or false:

dieIfFalse(fm.isDeletableFileAtPath(sourcePath))

dieOnThrow("Failed to delete \(sourcePath)") {
    try fm.removeItemAtPath(sourcePath)
}

dieIfTrue(fm.fileExistsAtURL(sourceURL))

Installation

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