TypeScriptのコマンドラインパーサー

Transcript

1. 1.

   TypeScriptͰ ίϚϯυϥΠϯ
 ύʔαʔ NodeֶԂ34ݶ໨ ҏ౻ɹӯ

2. 2.

   ࣗݾ঺հ • ҏ౻ɹӯ (͍ͱ͏ɹ͖͋ͱʣ • @akito0107 • όοΫΤϯυΤϯδχΞ • Go

   / TypeScriptΛॻ͍͍ͯ·͢ • https://blog.akito0107.dev
3. 3.

   ໨࣍ • ίϚϯυϥΠϯύʔαʔΛ࡞ͬͨ࿩ • ͳͥ࡞͔ͬͨ • Demo • ࢖͍ํʹ͍ͭͯ

4. 4.

   Node.jsͰ
 ίϚϯυϥΠϯπʔϧΛ࡞Δ • ҎԼͷΑ͏ͳϥΠϒϥϦ͕༗໊ • substack/minimist • tj/commander • cacjs/cac

   • yargs/yargs • ෳࡶͳΦϓγϣϯΛύʔε͢Δͱ͖ʹਏ͍
5. 5.

   Option Hell • ex) kubectl


6. 6.

   Sub command΋ ͭΒ͍

7. 7.

   ίϚϯυϥΠϯͷΦϓγϣϯ • ͋Δఔ౓ෳࡶͳίϚϯυΛ࣮૷͠Α͏ͱͨ͠ ৔߹ɺΦϓγϣϯͷ਺͕Ͳ͏ͯ͠΋๲Ε্ ͕ͬͯ͠·͏ • طଘϥΠϒϥϦͰෳࡶͳΦϓγϣϯΛѻ͓͏ ͱ͢Δͱݫ͍͠(ͱࢥͬͯΔ)

8. 8.

   ex) commander

9. 9.

   ex) commander ܕ͕΄͍͠ʂʂʂʂ

10. 10.

    ܕ͕ͭ͘΍ͭΛ࡞ͬͨ • https://github.com/akito0107/marron-glace • σϞ

11. 11.

    ϑϥάͷఆٛͷ࢓ํ • makeStringFlag / makeBooleanFlag … • ͜ΕΒͷؔ਺ʹɺϑϥάͷ໊લͱΦϓγϣϯ ʢσϑΥϧτ࣌ͷ஋ɺhelpͰදࣔ͢Δจݴͳ ͲʣΛ౉͢

12. 12.

    <= Stringͷͱ͖͸stringҎ֎ڐ༰͠ͳ͍ <=helpͷͱ͖ͷจݴ <= -s Ͱ΋ड͚ΒΕΔΑ͏ʹ —flag1 ͷϑϥάΛఆٛ —flag2 ͷϑϥάΛఆٛ

13. 13.

    ϑϥάͷreduce • reduceFlagͰෳ਺ͷϑϥάΛ·ͱΊΔ • reduceFlagͷฦΓ஋΋flagͳͷͰɺ࠶౓ reduce͢Δ͜ͱ͕Ͱ͖Δ

14. 14.

    makeCommand • flagΛmakeCommandͷύϥϝʔλʹ౉͢ <= ͜ͷ͋ͨΓ͸helpͰग़͢΍ͭ

15. 15.

    (positional)Arguments • `mv src target` ͷsrc, targetͷΑ͏ʹɺίϚϯ υʹΘͨ͢Ҿ਺΋ܕ෇͖Ͱαϙʔτ

16. 16.

    makeCommandʹΘͨ͢ <= ͜͜ʹิ׬͕ޮ͘

17. 17.

    Sub commands • makeSubcommandHandlerΛ࢖͏ <= ͜͜ʹsubCommandΛ͍ΕΔ

18. 18.

    Sub commandΛ࡞Δ <= ਌ίϚϯυͷflag <= subίϚϯυͷflag ↑ ਌ίϚϯυͱreduce͢Δ <- ਌ίϚϯυͷflagͱ


    subίϚϯυͷflag͕྆ํ࢖͑Δ
19. 19.

    ͦͷଞ • —helpͰϔϧϓίϚϯυ • ಠࣗܕͷflag • ৄ͘͠͸ϒϩάʹ

20. 20.

    ·ͱΊ • TypeScriptܕਪ࿦͕όϦόϦޮ͘ίϚϯυϥ ΠϯπʔϧΛ࡞ͬͨ • όάͳͲ͋Γ·ͨ͠Β࿈བྷ͍ͯͩ͘͠͞ʂ

21. 21.

    ͋Γ͕ͱ͏͍͟͝·ͨ͠