Welcome to ShellOut, a simple package that enables you to easily “shell out” from a Swift script or command line tool.
Even though you can accomplish most of the tasks you need to do in native Swift code, sometimes you need to invoke the power of the command line from a script or tool - and this is exactly what ShellOut makes so simple.
Just call shellOut()
, and specify what command you want to run, along with any arguments you want to pass:
let output = try shellOut(to: "echo", arguments: ["Hello world"])
print(output) // Hello world
You can also easily run a series of commands at once, optionally at a given path:
try shellOut(to: ["mkdir NewFolder", "echo \"Hello again\" > NewFolder/File"], at: "~/CurrentFolder")
let output = try shellOut(to: "cat File", at: "~/CurrentFolder/NewFolder")
print(output) // Hello again
In case of an error, ShellOut will automatically read STDERR
and format it nicely into a typed Swift error:
do {
try shellOut(to: "totally-invalid")
} catch {
let error = error as! ShellOutError
print(error.message) // Prints STDERR
print(error.output) // Prints STDOUT
}
Another way to use ShellOut is by executing pre-defined commands, that enable you to easily perform common tasks without having to construct commands using strings. It also ships with a set of such pre-defined commands for common tasks, such as using Git, manipulating the file system and using tools like Marathon, CocoaPods and fastlane.
try shellOut(to: .gitInit())
try shellOut(to: .gitClone(url: repositoryURL))
try shellOut(to: .gitCommit(message: "A scripted commit!"))
try shellOut(to: .gitPush())
try shellOut(to: .gitPull(remote: "origin", branch: "release"))
try shellOut(to: .gitSubmoduleUpdate())
try shellOut(to: .gitCheckout(branch: "my-feature"))
try shellOut(to: .createFolder(named: "folder"))
try shellOut(to: .createFile(named: "file", contents: "Hello world"))
try shellOut(to: .moveFile(from: "path/a", to: "path/b"))
try shellOut(to: .copyFile(from: "path/a", to: "path/b"))
try shellOut(to: .openFile(at: "Project.xcodeproj"))
try shellOut(to: .readFile(at: "Podfile"))
try shellOut(to: .removeFile(from: "path/a"))
try shellOut(to: .createSymlink(to: "target", at: "link"))
try shellOut(to: .expandSymlink(at: "link"))
For a more powerful and object-oriented way to handle Files & Folders in Swift, check out Files
try shellOut(to: .runMarathonScript(at: "~/scripts/MyScript", arguments: ["One", "Two"]))
try shellOut(to: .updateMarathonPackages())
try shellOut(to: .createSwiftPackage(withType: .executable))
try shellOut(to: .updateSwiftPackages())
try shellOut(to: .generateSwiftPackageXcodeProject())
try shellOut(to: .buildSwiftPackage())
try shellOut(to: .testSwiftPackage())
try shellOut(to: .runFastlane(usingLane: "appstore"))
try shellOut(to: .updateCocoaPods())
try shellOut(to: .installCocoaPods())
Don't see what you're looking for in the list above? You can easily define your own commands using ShellOutCommand
. If you've made a command you think should be included among the built-in ones, feel free to open a PR!
$ marathon add https://github.com/JohnSundell/ShellOut.git
.https://github.com/JohnSundell/ShellOut.git
to your Marathonfile
.$ marathon run yourScript.swift
..package(url: "https://github.com/JohnSundell/ShellOut.git", from: "2.0.0")
to your Package.swift
file's dependencies
.$ swift package update
.