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Designing libraries in Go way

ktr
March 10, 2021
Programming
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Designing libraries in Go way

ktr

March 10, 2021
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Transcript

  1. at Gopherಓ৔ ಉ૭ձ2021 Go Β͍͠ϥΠϒϥϦΛ
 ͭ͘ΔͨΊʹߟ͑Δ͜ͱ

  2. LUS !LUS@!LUS  .FSQBZ$PEFQBZNFOU5FBN #BDLFOE XIPBNJ

  3. at Gopherಓ৔ ಉ૭ձ2021 Go Β͍͠ϥΠϒϥϦΛ
 ͭ͘ΔͨΊʹߟ͑Δ͜ͱ

  4. w Ͱ΋Ͳ͏͢Ε͹ʜʁ w (PΒ͍͠ॻ͖ํɺϦϙδτϦͷઃఆɺ഑෍ͷ࢓ํʜ w ϦϙδτϦʹΑͬͯ͞·͟· (P੡ϥΠϒϥϦΛެ։͍ͨ͠ʂ

  5. (PQIFS͔Βݟͯɺ
 ͲΜͳϥΠϒϥϦͩͱخ͍͠ͷ͔ΛΫϦΞʹ͢Δ ͜ͷτʔΫͰ఻͍͑ͨ͜ͱ

  6. (PQIFS͔Βݟͯɺ
 ͲΜͳ044ͩͱخ͍͠ͷ͔ΛΫϦΞʹ͢Δ ͜ͷτʔΫͰ఻͍͑ͨ͜ͱ ࣮ࡍʹ044Λग़͢ࡍͷ໎͍Λখ͘͢͞Δʂ

  7. w $-*πʔϧݻ༗ͷϓϥΫςΟε w ಛఆͷϥΠϒϥϦ΍ϑϨʔϜϫʔΫͷ۷ΓԼ͛ ͜ͷτʔΫͰѻΘͳ͍͜ͱ

  8.  ϥΠϒϥϦઃܭͰؾΛ͚͍ͭͯΔ͜ͱ  044ͱͯ͠ެ։͢ΔͨΊʹ  ·ͱΊ ໨࣍

  9. ϥΠϒϥϦઃܭͰؾΛ͚͍ͭͯΔ͜ͱ

  10. Τϥʔ

  11. w αʔυύʔςΟͷΤϥʔϥΠϒϥϦ΍YFSSPST͸ ͔ͭΘͳ͍ w ϥΠϒϥϦͷϢʔβʹͦͷΤϥʔϥΠϒϥϦͷ
 ࢖༻Λڧ੍ͤͯ͞͠·͏ͨΊ Ͱ͖ΔݶΓඪ४ΤϥʔͷΈΛ͔ͭ͏

  12. w Ͱ͖ΔݶΓerrorsύοέʔδͷ"1*ͱޓ׵ੑ Λ࣋ͭ΋ͷΛબͿ w errors.Asɺerrors.Isɺerrors.Unwrap ඪ४ΤϥʔҎ֎Λ͔ͭ͏৔߹

  13. $POUFYU

  14. w DPOUFYUΩϟϯηϧػߏΛந৅Խͨ͠΋ͷ w ࣮ߦʹ௕͍͕͔͔࣌ؒΔՄೳੑͷ͋Δ΋ͷ͸ DPOUFYUΛαϙʔτ͢΂͖ $POUFYUBXBSF

  15. ྫLUSBQJHFO

  16. w (P੡ϥΠϒϥϦ w DVSMίϚϯυΛ࣮ߦͨ݁͠Ռ͔Β(P"1*ΫϥΠΞϯτ Λࣗಈੜ੒͢Δ LUSBQJHFO

  17. $ curl https://api.github.com/repos/ktr0731/apigen { "id": 312020626, "node_id": "MDEwOlJlcG9zaXRvcnkzMTIwMjA2MjY=", "name": "apigen",

    "full_name": "ktr0731/apigen", "private": false, "owner": { "login": "ktr0731", "id": 12953836, "node_id": "MDQ6VXNlcjEyOTUzODM2", …
  18. None
  19. None

  20. w ಺෦Ͱ"1*ϦΫΤετΛߦ͍ͬͯΔͨΊ w ͙͢ʹ݁Ռ͕ฦͬͯ͘Δͱ͸ݶΒͳ͍ w DPOUFYUΛड͚औΔ͜ͱͰ্ҐϨΠϠʔʹΩϟϯηϧɾ λΠϜΞ΢τͷ࢓૊ΈΛఏڙͰ͖Δ ͳͥDPOUFYUBXBSFͳؔ਺ͳͷ͔ʁ

  21. Φϓγϣϯ

  22. w ߏ଄ମ w GVODUJPOBMPQUJPOQBUUFSO Φϓγϣϯ

  23. w $PNNBOEܕͷϑΟʔϧυͰΦϓγϣϯ஋Λड͚Δ w TQGDPCSB

  24. w ؔ਺ͱՄม௕Ҿ਺ͷ૊Έ߹ΘͤͰΦϓγϣϯΛදݱ w ΦϓγϣϯܕΛΤΫεϙʔτ͢Δඞཁ͕ͳ͍ w ؆ܿͰ໌շͳهड़ʹͳΔ GVODUJPOBMPQUJPOQBUUFSO

  25. LUSBQJHFO

  26. LUSBQJHFO

  27. LUSBQJHFO

  28. w Ұ௕Ұ୹ w Φϓγϣϯ͕ଟ͍৔߹ɺߏ଄ମͷ΄͏͕ݟ௨͕͠ྑ͍ w (PGNU͕ϑΟʔϧυΛଗ͑ͯ͘ΕΔ w ͦΕҎ֎͸GVODUJPOBMPQUJPOQBUUFSO͕ྑͦ͞͏ ߏ଄ମWTGVODUJPOBMPQUJPOQBUUFSO

  29. w Φϓγϣϯ΋࢓༷ͷҰ෦ w ૿΍ͨ͢ͼʹϥΠϒϥϦͷෳࡶੑ͕૿͢ w ඞཁ࠷௿ݶʹอͭ ΦϓγϣϯΛ૿΍͗͢͠ͳ͍

  30. ྫ"1*ΫϥΠΞϯτͷϦτϥΠ

  31. None

  32. ϦτϥΠʹؔ͢ΔΦϓγϣϯ͕
 ͨ͘͞Μ͋ͬͯෳࡶʜ🤔

  33. Φϓγϣϯ͕Ұ͚ͭͩʹͳͬͯ
 Θ͔Γ΍͘͢ͳͬͨ☺

  34. DFOLBMUJCBDLP⒎ʹґଘͯ͠͠·͍ͬͯΔ😨

  35. w )551ϦΫΤετʹࣦഊͨ͠ͱ͖ʹҰఆ࣌ؒ଴ͪɺ
 ࠶౓ϦΫΤετΛ౤͛Δ ϦτϥΠʹ͍ͭͯ΋͏Ұ૚ਂ͘ߟ͑Δ

  36. w )551ϦΫΤετʹࣦഊͨ͠ͱ͖ʹҰఆ࣌ؒ଴ͪɺ
 ࠶౓ϦΫΤετΛ౤͛Δ w ϦτϥΠ͸)551ϦΫΤετͷͨΊʹ͔͠࢖ΘΕͳ͍ ϦτϥΠʹ͍ͭͯ΋͏Ұ૚ਂ͘ߟ͑Δ

  37. w )551ϦΫΤετʹࣦഊͨ͠ͱ͖ʹҰఆ࣌ؒ଴ͪɺ
 ࠶౓ϦΫΤετΛ౤͛Δ w ϦτϥΠ͸)551ϦΫΤετͷͨΊʹ͔͠࢖ΘΕͳ͍ w )551ΫϥΠΞϯτͰ࣮૷Ͱ͖ΔͷͰ͸ʜʁ ϦτϥΠʹ͍ͭͯ΋͏Ұ૚ਂ͘ߟ͑Δ

  38. w )551ϦΫΤετʹࣦഊͨ͠ͱ͖ʹҰఆ࣌ؒ଴ͪɺ
 ࠶౓ϦΫΤετΛ౤͛Δ w ϦτϥΠ͸)551ϦΫΤετͷͨΊʹ͔͠࢖ΘΕͳ͍ w )551ΫϥΠΞϯτͰ࣮૷Ͱ͖ΔͷͰ͸ʜʁ w ͦ΋ͦ΋ϦτϥΠʹؔͯ͜͠ͷϥΠϒϥϦͰߟ͑Δඞཁ͋Δʜʁ ϦτϥΠʹ͍ͭͯ΋͏Ұ૚ਂ͘ߟ͑Δ

  39. w ґଘ͕ඪ४ύοέʔδ͚ͩʹͳΔ w ϦτϥΠʹ·ͭΘΔؔ৺ࣄΛ෼཭Ͱ͖Δ w Ϣʔβ͸೚ҙͷϦτϥΠ࣮૷Λબ΂Δ w τϨʔε΍ϩΨʔͳͲΛ࢓ࠐΈ͍ͨ৔߹Ͱ΋ϥΠϒϥϦͷ
 Φϓγϣϯ͕૿͑ͳ͍ʂ )551ΫϥΠΞϯτΛड͚औΔϝϦοτ

  40. )551ΫϥΠΞϯτΛड͚औΔΑ͏ʹͯ͠ΈΔ

  41. None

  42. Ϣʔβ͸IBTIJDPSQHPSFUSZBCMFIUUQͰϦτϥΠΛߦ͏

  43. None

  44. (PΒ͍͠ΠϯλʔϑΣʔεΛ
 ఏڙ͢Δ

  45. w ඪ४ɾ४ඪ४ύοέʔδ͕͓खຊ w ޙํޓ׵ੑͷͨΊʹ࿪ʹͳ͍ͬͯΔՕॴ΋
 ΋ͪΖΜ͋ΔͷͰ஫ҙ (PΒ͍͠ΠϯλʔϑΣʔεΛఏڙ͢Δ

  46. ྫLUSBQJHFO

  47. w DVSMίϚϯυ w ੜ੒͢ΔϑΝΠϧͷύοέʔδ໊ w ੜ੒͢Δϝιου໊ w ϝιουͷύϥϝʔλ໊ w FUD

    BQJHFOͷೖྗ

  48. ίϚϯυϥΠϯʜʁ $ apigen --package api --out api_gen.go \ "curl example.com/post"

    "GetPost" \ "curl -d "{...}" example.com/posts" "CreatePost"

  49. ίϚϯυϥΠϯʜʁ $ apigen --package api --out api_gen.go \ "curl example.com/post"

    "GetPost" \ "curl -d "{...}" example.com/posts" "CreatePost" ੜ੒ର৅"1*͕૿͑ΔͨͼʹҾ਺͕૿͑Δ🤔 ҉໧తʹʮDVSMίϚϯυʯʮϝιου໊ʯͷϖΞΛཁٻ͍ͯͯ͠௚ײతͰ͸ͳ͍ʜ

  50. ֎෦ϑΝΠϧʜʁ $ apigen --package api --out api_gen.go definition.yaml

  51. ֎෦ϑΝΠϧʜʁ $ apigen --package api --out api_gen.go definition.yaml ࣮ߦ࣌ʹ͔͠ଥ౰ੑ͕ݕূͰ͖ͳ͍ͷͰ࢖͍ͮΒ͍🤔

  52. w DVSMίϚϯυΛ࣮ߦͨ݁͠Ռ͔Β(P"1*ΫϥΠΞϯτ Λࣗಈੜ੒͢Δ BQJHFOͷ૝ఆϢʔβΛࢥ͍ग़͢

  53. w DVSMίϚϯυΛ࣮ߦͨ݁͠Ռ͔Β(P"1*ΫϥΠΞϯτ Λࣗಈੜ੒͢Δ BQJHFOͷ૝ఆϢʔβΛࢥ͍ग़͢

  54. w DVSMίϚϯυΛ࣮ߦͨ݁͠Ռ͔Β(P"1*ΫϥΠΞϯτ Λࣗಈੜ੒͢Δ w Ϣʔβ͸(PͰ։ൃΛ͍ͯ͠Δ͜ͱΛલఏʹͰ͖Δ w (PΛ͏·͘࢖ͬͨྑ͍ղܾࡦ͕͋Γͦ͏ʜ BQJHFOͷ૝ఆϢʔβΛࢥ͍ग़͢

  55. w ४ඪ४ύοέʔδͷBOBMZTJTΛར༻ w BOBMZTJT"OBMZ[FSΛड͚औ͍ͬͯΔ HPWFUͷ࣮૷

  56. w ϑΟʔϧυͰ͞·͟·ͳઃఆΛ
 ߦ͍ͬͯΔ BOBMZTJT"OBMZ[FS

  57. w ϑΟʔϧυͰ͞·͟·ͳઃఆΛ
 ߦ͍ͬͯΔ BOBMZTJT"OBMZ[FS

  58. w BOBMZTJTύοέʔδͷΑ͏ʹઃఆΛߦ͏ܕΛ
 ఆٛ͠ɺΤϯτϦϙΠϯτؔ਺΁౉͢ ྑͦ͞͏ͳղܾࡦ

  59. None

  60. "1*ఆٛΛߦ͏

  61. ίʔυੜ੒ʂ

  62. None

  63. w ੩తܕ෇͚͞ΕͨίʔυδΣωϨʔλ w "1*ఆٛΛॻ͍ͯapigen.Generate΁౉͚ͩ͢ w ΦϓγϣϯͰio.WriterΛड͚औͬͨΓ͢Δ͜ͱ΋Մೳʂ ސ٬͕ຊ౰ʹཉ͔ͬͨ͠΋ͷ

  64. ྫLUSHPGV[[ZpOEFS

  65. w (P੡ϥΠϒϥϦ w G[GͷΑ͏ͳGV[[ZpOEFSΛ(P੡$-*πʔϧ ʹ૊ΈࠐΊΔ LUSHPGV[[ZpOEFS

  66. None

  67. ֤ީิΛදࣔ͢ΔͨΊʹ͸ʜ🤔

  68. ಠࣗܕͰީิΛ౉ͯ͠΋Β͏ʁ

  69. Ϣʔβ͸ຖճ[]*CandidateΛͭ͘Βͳ͍ͱ ͍͚ͳ͍ͷͰ͋·Γ࢖͍উख͕ྑ͘ͳ͍ʜ

  70. w δΣωϦΫε͸ ·ͩ ͳ͍ ೚ҙͷܕͷεϥΠεΛѻ͏ʹ͸ʜʁ

  71. w δΣωϦΫε͸ ·ͩ ͳ͍ w ඪ४ύοέʔδʹ೚ҙͷܕͷεϥΠεΛѻ͍ͬͯ Δؔ਺͕͋ͬͨΑ͏ͳʜʁ ೚ҙͷܕͷεϥΠεΛѻ͏ʹ͸ʜʁ

  72. TPSU4MJDF

  73. None
  74. None

  75. εϥΠεͷܕʹ͸ؔ༩ͤͣɺީิJͷλΠτϧΛ ܾఆ͢ΔͨΊͷؔ਺Λड͚औΔΑ͏ʹ

  76. εϥΠεͰ͋Ε͹ͳΜͰ΋౉ͤΔΑ͏ʹʂ

  77. None

  78. 044ͱͯ͠ެ։͢ΔͨΊʹ

  79. w (JU)VC͕ެ։͍ͯ͠Δ044ͷΨΠυ w 044ͷ8)"58):ɺߩݙํ๏ɺϓϩδΣΫτͷ
 ্ཱͪ͛ํͳͲΛ໢ཏ͍ͯ͠Δ w ୯७ʹಡΈ෺ͱͯ͠΋͓΋͠Ζ͍ 0QFO4PVSDF(VJEFTΛಡΉ

  80. https://opensource.guide/ja/starting-a-project/

  81. w ϓϩδΣΫτͷґଘ؅ཧͷͨΊ w όʔδϣϯ؅ཧ͞ΕͨϞδϡʔϧͱͯ͠ఏڙ͢ΔͨΊ (PNPEVMFTʹରԠ͢Δ

  82. $ go mod init && go mod tidy (PNPEVMFTʹରԠ͢Δ

  83. $ go mod init && go mod tidy (PNPEVMFTʹରԠ͢Δ ˞λά෇͚ʹ͍ͭͯ͸ޙड़

  84. w ࣗ෼ͷ044͕ґଘ͍ͯ͠ΔϞδϡʔϧͷ
 ϥΠηϯε΋දه͢΂͖ w 4POHNVHPDSFEJUT͕΂ΜΓ ґଘϞδϡʔϧͷϥΠηϯεදه

  85. $ gocredits -w . ґଘϞδϡʔϧͷϥΠηϯεදه

  86. w (PNPEVMFTͰMJOUFSͳͲͷπʔϧ܈΋؅ཧ͢Δ w Ϗϧυ΍ςετͷ࠶ݱੑΛ΋ͨͤΔͨΊ (Pπʔϧͷґଘ؅ཧ

  87. https://github.com/golang/go/wiki/Modules#how-can-i-track-tool-dependencies-for-a-module

  88. w (JUλάΛ੾ͬͯQVTI͢Ε͹৽͍͠Ϟδϡʔϧ ͱͯ͠ೝࣝ͞ΕΔ ϥΠϒϥϦͷ഑෍

  89. w (P3FMFBTFSΛ͔ͭ͏ͱΑΓྑ͍͔΋ w (JU)VC3FMFBTFTͷ࡞੒ɺ$IBOHFMPHͷ࡞੒Λ Α͠ͳʹ΍ͬͯ͘ΕΔ ϥΠϒϥϦͷ഑෍

  90. $ cat .goreleaser.yaml builds: - skip: true $ git tag

    v0.1.0 main $ goreleaser ϥΠϒϥϦͷ഑෍

  91. w 044ͱͯ͠ग़͢ϥΠϒϥϦ͸ϢʔβͷͨΊʹ
 υΩϡϝϯτΛॻ͘΂͖ υΩϡϝϯτ

  92. w Ϣʔβͷࢹ఺ͰυΩϡϝϯτΛಡΊΔ w (P%PD͚ͩͰ࢖͍ํ͕ཧղͰ͖Δ͔ʁ w ެ։͢Δඞཁͷͳ͍΋ͷͳ͍͔ʁ w ࢓༷ͷ࿙Ε͸ͳ͍͔ʁ (P%PDΛ࢖ͬͨυΩϡϝϯτͷચ࿅

  93. w ਓʑ͸υΩϡϝϯτΛಡ·ͳ͍ w &YBNQMFςετ͕͋Ε͹ɺͦͷϥΠϒϥϦͷ࣭ ͕͋Δఔ౓Θ͔Δ &YBNQMFςετΛ༻ҙ͢Δ

  94. None

  95. w &YBNQMFςετΑΓෳࡶͳ࢖༻ྫΛஔ͍͓ͯ͘ @FYBNQMFσΟϨΫτϦ

  96. w @΍͔Β࢝·ΔϑΝΠϧɾσΟϨΫτϦ
 ͓ΑͼUFTUEBUBͱ͍͏σΟϨΫτϦ͸
 (Pπʔϧ͔Βແࢹ͞ΕΔ w @FYBNQMFͱ͍͏໋໊͸׳श ಛघͳϑΝΠϧ໊ɾσΟϨΫτϦ໊ https://golang.org/cmd/go/#hdr-Package_lists_and_patterns

  97. ·ͱΊ

  98. w αʔυύʔςΟ΁ͷґଘΛগͳ͘ɾখ͘͞อͭ w ࢓༷Λগͳ͘ɾখ͘͞อͭ w DPOUFYUΛͪΌΜͱαϙʔτ͢Δ w (PΒ͍͠ΠϯλʔϑΣʔεΛఏڙ͢Δ w ඪ४ɾ४ඪ४ύοέʔδ͕ͱͯ΋ࢀߟʹͳΔ

    ϥΠϒϥϦઃܭͰؾΛ͚͍ͭͯΔ͜ͱ

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