Расскажу об использовании Swift для построения CLI инструментов и написании скриптов. А так же, что нам для этого понадобится. И, конечно же, рассмотрим плюсы и минусы нового игрока на поле :)

1. IT Saturday • @aleks_voronov • Stanfy
BUILDING CLI WITH SWIFT
ALEXANDER VORONOV, STANFY
@aleks_voronov

2. IT Saturday • @aleks_voronov • Stanfy
REASON WHY?

3. IT Saturday • @aleks_voronov • Stanfy
OTHER PLATFORMS

4. IT Saturday • @aleks_voronov • Stanfy
JAVASCRIPT
NODEJS
NPM
BOWER
GULP
GRUNT

5. IT Saturday • @aleks_voronov • Stanfy
RUBY
RACK
RAILS
SINATRA
RUBYGEMS
RAKE

6. IT Saturday • @aleks_voronov • Stanfy
PYTHON
PYPI
PIP
…

7. IT Saturday • @aleks_voronov • Stanfy
SWIFT
COCOAPODS
CARTHAGE
SPM
PERFECT
COMMANDANT

8. IT Saturday • @aleks_voronov • Stanfy
FULLSTACK
MULTIPLATFORM

9. IT Saturday • @aleks_voronov • Stanfy
FULLSTACK
MULTIPLATFORM

10. IT Saturday • @aleks_voronov • Stanfy
WHAT IS CLI?

11. IT Saturday • @aleks_voronov • Stanfy
WHAT IS CLI?

12. IT Saturday • @aleks_voronov • Stanfy
CLI ARGUMENTS

13. IT Saturday • @aleks_voronov • Stanfy
POSIX STANDARD 📘
SHORT FLAGS
$ ls -a
$ ruby -v
$ git commit -m "..."

14. IT Saturday • @aleks_voronov • Stanfy
GNU STANDARD 📙
LONG FLAGS
$ ls --all
$ ruby --version
$ git commit --message "..."

15. IT Saturday • @aleks_voronov • Stanfy
COMBINED FLAGS 🏴
$ git commit -a -m "..."
$ git commit -am "..."

16. IT Saturday • @aleks_voronov • Stanfy
SUBCOMMANDS 🏘
$ git log -2
$ git status
$ git commit -am "..."

17. IT Saturday • @aleks_voronov • Stanfy
STANDARD IO 📥📤
0 - STDIN
1 - STDOUT
2 - STDERR

18. IT Saturday • @aleks_voronov • Stanfy
0 - STDIN
1 - STDOUT
2 - STDERR
$ cat nofile
> cat: nofile: No such file or directory

19. IT Saturday • @aleks_voronov • Stanfy
0 - STDIN
1 - STDOUT
2 - STDERR
$ cat nofile 2>>err.log

20. IT Saturday • @aleks_voronov • Stanfy
0 - STDIN
1 - STDOUT
2 - STDERR
$ cat nofile 2>&1

21. IT Saturday • @aleks_voronov • Stanfy
0 - STDIN
1 - STDOUT
2 - STDERR
$ cat nofile 2>>err.log 1>>out.log

22. IT Saturday • @aleks_voronov • Stanfy
0 - STDIN
1 - STDOUT
2 - STDERR
$ cat nofile 2>/dev/null

23. IT Saturday • @aleks_voronov • Stanfy
0 - STDIN
1 - STDOUT
2 - STDERR
$ cat nofile 2>&1 | grep kernel

24. IT Saturday • @aleks_voronov • Stanfy
UNIX PIPELINES ⛓
$ ls -l | grep "Mar" | sort

25. IT Saturday • @aleks_voronov • Stanfy
UNIX PIPELINES ⛓
$ ps aux | grep Xcode | awk '{print $2}'

26. IT Saturday • @aleks_voronov • Stanfy
UNIX PIPELINES ⛓
$ git branch | xargs git branch -D
😈

27. IT Saturday • @aleks_voronov • Stanfy
CLI WITH SWIFT 🖥

28. IT Saturday • @aleks_voronov • Stanfy
SWIFT REPL 🔃
(READ-EVALUATION-PRINT-LOOP)
$ swift

29. IT Saturday • @aleks_voronov • Stanfy
IMMEDIATE MODE 🚀
$ swift script.swift

30. IT Saturday • @aleks_voronov • Stanfy
SWIFT COMPILE ⚙
$ swiftc script.swift
$ ./script

31. IT Saturday • @aleks_voronov • Stanfy
SWIFT COMPILE ⚙
$ swiftc script.swift -o myscript
$ ./myscript

32. IT Saturday • @aleks_voronov • Stanfy
EXECUTABLE SCRIPTS 💾

33. IT Saturday • @aleks_voronov • Stanfy
EXECUTABLE SCRIPTS
#!/USR/BIN/SWIFT
HASHBANG

34. IT Saturday • @aleks_voronov • Stanfy
EXECUTABLE SCRIPTS
CHMOD +X SCRIPT.SWIFT

35. IT Saturday • @aleks_voronov • Stanfy
SCALING OUR CLI 🏗
WORKING WITH MULTIPLE FILES

36. IT Saturday • @aleks_voronov • Stanfy
MAIN.SWIFT 👑

37. IT Saturday • @aleks_voronov • Stanfy
EXECUTING MULTIPLE FILES📄📄
$ swift main.swift script.swift

38. IT Saturday • @aleks_voronov • Stanfy
$ swiftc main.swift script.swift -o script
EXECUTING MULTIPLE FILES📄📄

39. IT Saturday • @aleks_voronov • Stanfy
$ swiftc script.swift main.swift -o script
EXECUTING MULTIPLE FILES📄📄

40. IT Saturday • @aleks_voronov • Stanfy
$ swiftc *.swift -o script
EXECUTING MULTIPLE FILES📄📄

41. IT Saturday • @aleks_voronov • Stanfy
$ find . -iname '*.swift' | xargs swiftc -o script
EXECUTING MULTIPLE FILES📄📄

42. IT Saturday • @aleks_voronov • Stanfy
EXTERNAL RESOURCES 🎁

43. IT Saturday • @aleks_voronov • Stanfy
SYSTEM DEPENDENCIES 💼
$ swiftc script.swift
$ xcrun -sdk macosx swiftc script.swift

44. IT Saturday • @aleks_voronov • Stanfy
CUSTOM DEPENDENCIES 🛠
-F
$ swift -F /Carthage/Build/Mac script.swift

45. IT Saturday • @aleks_voronov • Stanfy
CUSTOM DEPENDENCIES
#!/USR/BIN/SWIFT -F Carthage/Build/Mac
HASHBANG

46. IT Saturday • @aleks_voronov • Stanfy
COMPILING DEPENDENT SCRIPT 🤖

47. IT Saturday • @aleks_voronov • Stanfy
$ xcrun
-sdk macosx swiftc
-F Carthage/Build/Mac script.swift
COMPILING DEPENDENT SCRIPT
> dyld: Library not loaded: @rpath

48. IT Saturday • @aleks_voronov • Stanfy
$ xcrun
-sdk macosx swiftc
-F Carthage/Build/Mac script.swift
-Xlinker -rpath
-Xlinker @executable_path/Carthage/Build/Mac
COMPILING DEPENDENT SCRIPT

49. IT Saturday • @aleks_voronov • Stanfy
DEPENDENCIES MANAGEMENT 🍴

50. IT Saturday • @aleks_voronov • Stanfy
COCOAPODS 🤔

51. IT Saturday • @aleks_voronov • Stanfy
CARTHAGE 😏

52. IT Saturday • @aleks_voronov • Stanfy
SPM 😳
SWIFT PACKAGE MANAGER

53. IT Saturday • @aleks_voronov • Stanfy
PARSING ARGUMENTS 📬

54. IT Saturday • @aleks_voronov • Stanfy
PARSING ARGUMENTS
$ ./script one two three
$ ./script one two three
$ ./script "one two three"
3 args
1 arg
1 arg

55. IT Saturday • @aleks_voronov • Stanfy
PROCESS ENUM
Process.arguments == [
"./script.swift",
"one",
"two",
"three"
]

56. IT Saturday • @aleks_voronov • Stanfy
FILESYSTEM 🗄

57. IT Saturday • @aleks_voronov • Stanfy
FILESYSTEM
NSFILEMANAGER
NSFILEHANDLER
NSTASK
NSPIPE

58. IT Saturday • @aleks_voronov • Stanfy
HANDY
LIBRARIES
🏛
COMMANDER
OPTIONKIT
COMMANDANT
REACTIVETASKS
PRETTYCOLORS

59. IT Saturday • @aleks_voronov • Stanfy
REAL WORLD EXAMPLES 🌍
CARTHAGEKIT
CARTHAGE CLI

60. IT Saturday • @aleks_voronov • Stanfy
THANK YOU!

61. IT Saturday • @aleks_voronov • Stanfy
Q/A
@ALEKS_VORONOV A-VORONOV