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Swift FOR COMMAND-LINE TOOLS Marin Usalj - @supermarin - supermar.in

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Swift FOR COMMAND-LINE TOOLS Marin Usalj - @supermarin - supermar.in

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EVOLUTION Marin Usalj - @supermarin - supermar.in

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/Applications/Xcode6-Beta1.app/Contents/ Developer/usr/bin/xcrun swift -i hello.swift Marin Usalj - @supermarin - supermar.in

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xcrun swift -i hello.swift Marin Usalj - @supermarin - supermar.in

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swift -i hello.swift Marin Usalj - @supermarin - supermar.in

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swift hello.swift Marin Usalj - @supermarin - supermar.in

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XCODE-LESS DEVELOPMENT Marin Usalj - @supermarin - supermar.in

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SCRIPTING VS COMPILING Marin Usalj - @supermarin - supermar.in

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INTERPRETED LANGUAGES $ruby script.rb #Hello world! Marin Usalj - @supermarin - supermar.in

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INTERPRETED LANGUAGES $python script.py #Hello workd! Marin Usalj - @supermarin - supermar.in

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Marin Usalj - @supermarin - supermar.in

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COMPILED LANGUAGES $ clang -lobjc -framework Foundation -c script.m -o script.o $ chmod +x script.o $ ./script.o Marin Usalj - @supermarin - supermar.in

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GOLANG $ go run script.go Marin Usalj - @supermarin - supermar.in

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GOLANG $ go build script.go $ chmod +x script $ ./script Marin Usalj - @supermarin - supermar.in

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GOLANG $ go install script.go $ script Marin Usalj - @supermarin - supermar.in

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SWIFT WENT IN THE GO DIRECTION Marin Usalj - @supermarin - supermar.in

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SWIFT # Execute inline $ swift todos.swift Marin Usalj - @supermarin - supermar.in

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SWIFT # Compile and run - $ swiftc todos.swift -o todos - chmod +x todos - todos Marin Usalj - @supermarin - supermar.in

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CAVEATS $ time swift hello.swift Hello ! 0.33 real 0.04 user 0.05 sys Marin Usalj - @supermarin - supermar.in

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CAVEATS $ swiftc hello.swift $ time ./hello Hello ! 0.00 real 0.00 user 0.00 sys Marin Usalj - @supermarin - supermar.in

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CLI 101 Marin Usalj - @supermarin - supermar.in

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Marin Usalj - @supermarin - supermar.in

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#!/usr/bin/env swift var args = Process.arguments[1..

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$ ./hello.swift SLUG Hello SLUG! Marin Usalj - @supermarin - supermar.in

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SHEBANG1 #!/usr/bin/env swift 1 Also known as Hashbang, or even pound-bang (Wikipedia) Marin Usalj - @supermarin - supermar.in

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SHEBANG1 #!/usr/bin/env swift 1 Also known as Hashbang, or even pound-bang (Wikipedia) Marin Usalj - @supermarin - supermar.in

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SHEBANG1 $ swift hello.swift BECOMES $ ./hello 1 Also known as Hashbang, or even pound-bang (Wikipedia) Marin Usalj - @supermarin - supermar.in

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CHMOD $ chmod +x hello $ ./hello Marin Usalj - @supermarin - supermar.in

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$PATH $ export PATH=~/bin:$PATH Tell your OS where to find the custom scripts Marin Usalj - @supermarin - supermar.in

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STATUS CODES $? == 0 ! $? != 0 " Marin Usalj - @supermarin - supermar.in

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STATUS CODES if drink == ! println(“NEED SCOTCH”) exit(1) else # do work exit(0) end Marin Usalj - @supermarin - supermar.in

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OPTION PARSING2 OptionParser.new do |opts| opts.banner = "Usage: xcodebuild [options] | xcpretty" opts.on('-t', '--test', 'Use RSpec style output') do printer_opts[:formatter] = XCPretty::RSpec end end 2 Code sample is written in Ruby Marin Usalj - @supermarin - supermar.in

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OPTION PARSING DON’T WRITE BY HAND. USE FRAMEWORKS Marin Usalj - @supermarin - supermar.in

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CLIKIT KYLE FULLER Marin Usalj - @supermarin - supermar.in

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CLIKIT var manager = Manager() manager.register("issue", "Options for issue") { argv in println("Say `open`, `close` or `edit`") } manager.run() Marin Usalj - @supermarin - supermar.in

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OPTIONKIT ALEXANDROS SALAZAR Marin Usalj - @supermarin - supermar.in

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OPTIONKIT import OptionKit let opt1 = Option(trigger:.Mixed("e", "echo")) let opt2 = Option(trigger:.Mixed("h", "help")) let opt3 = Option(trigger:.Mixed("a", "allow-nothing")) let actualArguments = Array(Process.arguments[1..

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POSIX FLAGS --FLAG -F Marin Usalj - @supermarin - supermar.in

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POSIX FLAGS --VIEW --CONTROLLER -VC Marin Usalj - @supermarin - supermar.in

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DOCUMENTATION Marin Usalj - @supermarin - supermar.in

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git --help man git Marin Usalj - @supermarin - supermar.in

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Usage: xcodebuild [options] | xcpretty -t, --test Use RSpec style output -s, --simple Use simple output (default) -k, --knock Use knock output -f, --formatter PATH Use formatter returned from evaluating the specified Ruby file -c, --color Use colorized output Marin Usalj - @supermarin - supermar.in

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OPTION PARSER GENERATES DOCS FOR YOU Marin Usalj - @supermarin - supermar.in

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IO THE MOST IMPORTANT PART OF A CLI TOOL Marin Usalj - @supermarin - supermar.in

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IO SPAWNING (POPEN) Marin Usalj - @supermarin - supermar.in

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IO BEING SPAWNED git status | slug | say Marin Usalj - @supermarin - supermar.in

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READING / WRITING Marin Usalj - @supermarin - supermar.in

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import IO STDIN.eachLine { line in print("PRINTING: \(line)") } file.eachLine { line in print("PRINTING: \(line)") } Marin Usalj - @supermarin - supermar.in

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import IO readLines(stdin) { line in print("PRINTING: \(line)") } readLines(file) { line in print("PRINTING: \(line)") } Marin Usalj - @supermarin - supermar.in

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FILE FILESYSTEM TRAVERSAL Marin Usalj - @supermarin - supermar.in

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NSFILEMANAGER APIS Marin Usalj - @supermarin - supermar.in

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NSFILEMANAGER APIS Marin Usalj - @supermarin - supermar.in

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File.join(Dir.home, "code") # ~/code File.expand_path("~/code/file.rb") # /Users/supermarin/code/file.rb Marin Usalj - @supermarin - supermar.in

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Pain points Marin Usalj - @supermarin - supermar.in

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Marin Usalj - @supermarin - supermar.in

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EXTERNAL LIBRARIES Marin Usalj - @supermarin - supermar.in

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Imagine building an alarm clock that also talks to your coffee machine through it's API and requests a Lyft after you drink the coffee. Marin Usalj - @supermarin - supermar.in

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RUBYGEMS COCOAPODS Marin Usalj - @supermarin - supermar.in

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PEOPLE ABUSING /LIBRARY/FRAMEWORKS REQUIRES SUDO Marin Usalj - @supermarin - supermar.in

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FILE STRUCTURE --XCODE-- Marin Usalj - @supermarin - supermar.in

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FILE STRUCTURE !"" slug #"" bin !"" lib Marin Usalj - @supermarin - supermar.in

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TESTS Marin Usalj - @supermarin - supermar.in

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TESTS !"" slug #"" bin #"" lib !"" test Marin Usalj - @supermarin - supermar.in

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$ swift test Marin Usalj - @supermarin - supermar.in

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STRING MANIPULATION Marin Usalj - @supermarin - supermar.in

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REGEX Marin Usalj - @supermarin - supermar.in

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DISTRIBUTING FRAMEWORKS Marin Usalj - @supermarin - supermar.in

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Q/A MARIN USALJ | @SUPERMARIN | SUPERMAR.IN Marin Usalj - @supermarin - supermar.in

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Thank you Marin Usalj - @supermarin - supermar.in