Automate the boring staff with Ruby

- 2020.12.27. Tama.rb #25 年忘れLT会

Transcript

1. ୀ۶ͳ͜ͱ͸
   3VCZʹ͓Ͷ͕͍͠Α͏
   2020.12.27.
   Tama.rb #25 ೥๨ΕLTձ
   @makicamel
   

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2. w!NBLJDBNFM઒ݪສق
   wɹ
   w3VCZͱϏʔϧɹɹͱ͓ञ͕޷͖
   ࣗݾ঺հ
   

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3. ͓खݩͷRails ΞϓϦʹ
   BQQMJDBUJPO@DPOUSPMMFSSC
   ͍ͭ͋͘Γ·͔͢ʁ
   ಥવͰ͕͢
   ܧঝͱϝλϓϩάϥϛϯάຬࡌͳΞϓϦέʔγϣϯίʔυͰ΋ΞΫγϣϯͱϑΟϧλʹ೰·ͳ͍ͨΊͷ(FNΛ࡞ͬͨ࿩
   IUUQTTQFBLFSEFDLDPNNBLJDBNFMMFUTFOKPZDSFBUJOHHFNT
   

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4. ˞೥݄೔࣌఺
   "/%1"%
   # => 325
   $ find . -name application_controller.rb | wc -l
   

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5. ˞೥݄೔ݱࡏ
   "/%1"%
   $ fd application_controller.rb | wc -l
   # => 49
   # => 325
   ˞೥݄೔࣌఺
   $ find . -name application_controller.rb | wc -l
   85%ݮʂ
   ͍͢͝Ͷ
   

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6. ॳख
   •ͻͱͭͻͱͭखͰஔ͖׵͑Δ
   •σΟϨΫτϦຖʹ౗͍͚ͯ͠͹͍͍͸ͣ
   •ࠓ·Ͱͷ׳ྫ΋कΒΕͯແடংʹͳΒͳ͍
   •2 PullRequests Ͱ໿ 40 ϑΝΠϧ࡟আ
   •࣌ؒͱࠜؾͱूதྗͷඞཁͳ࡞ۀ
   

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7. खΛಈ͔ͯ͠ؾͮ͘
   •εΫϦϓτͰ͍͚ΔͷͰ͸ʁ
   

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8. ཌ݄༵೔
   

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9. ཌ݄༵೔
   ࢒໿ 240 ϑΝΠϧ͸দా͞Μ͕౗ͯ͘͠Ε·ͨ͠
   

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10. εΫϦϓτͰ΍Δͱ
    ͳʹ͕͏Ε͍͠ͷ͔
    

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11. εΫϦϓτͰ΍Δͱ
    •࡞ۀϛε͕ͳ͍
    •ਓؒ͸ؒҧ͑Δ
    •ϓϩάϥϜ͸໊લ͕ࣅ͍ͯΔϞδϡʔϧ͕͋ͬͯ΋ؒҧ͑ͳ͍
    •ϛεʹ஫ҙΛ෷Θͳͯ͘Α͍ͷͰϨϏϡʔෛ୲͕ݮΔ
    

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12. εΫϦϓτͰ΍Δͱ
    •࠶ݱੑ͕ߴ͍
    •ߟྀ࿙Ε͕͋ͬͯ΋ԿճͰ΋΍Γ௚͠Մೳ
    •ख࡞ۀͰಉ͡࡞ۀɾݕূΛ܁Γฦ͞ͳͯ͘Α͍
    

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13. εΫϦϓτͰ΍Δͱ
    •࠶ར༻ੑ͕ߴ͍
    •৚݅Λม͑ͯΑΓ෯޿͍໰୊ʹద༻Ͱ͖Δ
    •ૣ͍
    •80 ϑΝΠϧͷ࡟আ͕਺ඵ
    •ίϛοτͷ࡞੒΋Ͱ͖Δ
    

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14. εΫϦϓτͰ΍Δͱ
    •࣮֬
    •ʮ֬ೝͷ Rails.application.eager_load! ๨Εͨʂʯͱ͔ͳ͍
    •ʮrubocop -a ๨Εͨʂʯͱ͔ͳ͍
    

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15. εΫϦϓτͰ΍Δͱ
    •ؾ͍͍࣋ͪ
    •Ruby ͷΑ͞
    •୯७࡞ۀ͸ͭ·Βͳ͍ɾ͖͋Δɾूதྗɾࠜؾ͕ඞཁ
    •࢓ࣄͷ߹ؒʹؾ߹͍Ͱ΍͍ͬͯΔͷͰΤλΔ
    •ؾ͍͍࣋ͪͱΤλΒͳ͍ʂ
    

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16. εΫϦϓτͰ΍Δͱ
    •໰୊ͷ੾Γ෼͚ํ͕ҟͳΔ
    •ख࡞ۀ࣌ɿʮਓ͕ؒཧղ͢Δҙຯͷ୯Ґʯ
    •Θ͕ͨ͠࡞ۀͨ͠ͷ͸໊લۭؒ୯Ґ
    •εΫϦϓτ࣌ɿʮઃఆͨ͠৚݅୯Ґʯ
    •দా͞Μ͕࠷ॳʹઃఆͨ͠৚݅͸ʮ͔ΒͬΆͳίϯτϩʔϥʯ
    •ҙຯ͝ͱʹద༻΋Ͱ͖Δ͕ʮશ෦౗͢ʯͱ͍͏࡞ઓͰ΍ͬͨํָ͕
    

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17. ΍ͬͯΈΑ͏
    

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18. DBTF
    •ActiveSupport::Concern ͷ included ϒϩοΫͷ࢖༻ΛݮΒ͍ͨ͠
    

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19. DBTF
    •ActiveSupport::Concern ͷ included ϒϩοΫͷ࢖༻ΛݮΒ͍ͨ͠
    module EnergeticGreeting
    extend ActiveSupport::Concern
    included do
    def hi
    p '٩(ˊᗜˋ*)و'
    end
    end
    end
    class GreetingA
    include EnergeticGreeting
    end
    GreetingA.new.hi
    # => "٩(ˊᗜˋ*)و"
    •include ͞Εͨ࣌ʹ
    ϒϩοΫ಺ͷίʔυ͕࣮ߦ͞ΕΔ
    

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20. •Ϟδϡʔϧ͕ include ͞ΕΔ౓ʹ࣮ߦ͞ΕΔ
    •ϞδϡʔϧͷΠϯελϯεม਺ʹϒϩοΫΛ࣋ͪଓ͚Δ
    •ਅͷϝιουఆٛʹؾΛ഑Δඞཁ͕͋Δ
    •ϦϑΝΫλϦϯάʹ༨ܭͳίετ͕͔͔Δ
    includedϒϩοΫ
    ͨ·ʹ࢖͏ʹ͸
    ΂ΜΓͩΑ
    

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21. module DepressedGreeting
    def hi
    p 'ʢ◞‸◟ʣ'
    end
    end
    class GreetingB
    include DepressedGreeting
    end
    GreetingB.new.hi
    # => “ʢ◞‸◟ʣ”
    includedϒϩοΫ
    •Πϯελϯεϝιου͸
    Module#includeͰੜ΍ͤΔ
    

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22. module EnergeticGreeting
    extend ActiveSupport::Concern
    included do
    def hi
    p '٩(ˊᗜˋ*)و'
    end
    end
    end
    class GreetingA
    def hi
    p 'hi'
    end
    include EnergeticGreeting
    end
    GreetingA.new.hi
    # => "٩(ˊᗜˋ*)و"
    module DepressedGreeting
    def hi
    p 'ʢ◞‸◟ʣ'
    end
    end
    class GreetingB
    def hi
    p 'hi'
    end
    include DepressedGreeting
    end
    GreetingB.new.hi
    # => "hi"
    ʮਅͷϝιουఆٛʯ
    

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23. module EnergeticGreeting
    extend ActiveSupport::Concern
    included do
    def hi
    p '٩(ˊᗜˋ*)و'
    end
    end
    end
    class GreetingA
    def hi
    p 'hi'
    end
    include EnergeticGreeting
    end
    GreetingA.new.hi
    # => "٩(ˊᗜˋ*)و"
    ʮਅͷϝιουఆٛʯ
    module EnergeticGreeting
    extend ActiveSupport::Concern
    included do
    def hi
    p '٩(ˊᗜˋ*)و'
    end
    end
    end
    class GreetingA2
    include EnergeticGreeting
    def hi
    p 'hi'
    end
    end
    GreetingA2.new.hi
    # => "hi"
    

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24. •Module#include
    •Ϋϥεͷܧঝؔ܎ͷؒʹϞδϡʔϧ͕ૠೖ͞ΕΔ
    •ͨͩͷΦʔϓϯΫϥεͳͷͰݺͼग़͠ݩ͕༏ઌ
    •ActiveSupport::Concern
    •ࠇຐज़Λར༻
    •هड़͕ޙͷํ͕༏ઌ
    Ή͔͍ͣ͠Ͷ͐
    ʮਅͷϝιουఆٛʯ
    

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25. module EnergeticGreeting
    extend ActiveSupport::Concern
    included do
    def hi
    p '٩(ˊᗜˋ*)و'
    end
    end
    end
    class GreetingA
    def hi
    p 'hi'
    end
    include EnergeticGreeting
    end
    GreetingA.new.hi
    # => "٩(ˊᗜˋ*)و"
    ʮਅͷϝιουఆٛʯ
    module EnergeticGreeting
    extend ActiveSupport::Concern
    included do
    def hi
    p '٩(ˊᗜˋ*)و'
    end
    end
    end
    class GreetingA2
    include EnergeticGreeting
    def hi
    p 'hi'
    end
    end
    GreetingA2.new.hi
    # => "hi"
    

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26. •Ϟδϡʔϧ͕ include ͞ΕΔ౓ʹ࣮ߦ͞ΕΔ
    •ϞδϡʔϧͷΠϯελϯεม਺ʹϒϩοΫΛ࣋ͪଓ͚Δ
    •ਅͷϝιουఆٛʹؾΛ഑Δඞཁ͕͋Δ
    •ϦϑΝΫλϦϯάʹ༨ܭͳίετ͕͔͔Δ
    includedϒϩοΫ
    ࡟আΛࢼΈͨ PullRequest ΋͕͋ͬͨ
    ਅͷϝιουఆٛ໰୊͕ݪҼͰClose
    

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27. Ϟδϡʔϧ಺ͷϝιου͕࠶ఆٛ͞Ε͍ͯͳ͚Ε͹
    included ϒϩοΫΛ֎͍͍ͯ͠ͱݴ͑ΔͷͰ͸
    
    

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28. εΫϦϓτσϏϡʔ
    

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29. •খ࢝͘͞Ίͨ
    •͜ͷ࣌ͷର৅ϑΝΠϧ͸11ϑΝΠϧ
    •ϨϏϡʔ͕༰қ
    •εΫϦϓτ΋ description ʹష͓ͬͯ͘
    •ϨϏϡʔͷҰॿʹͳΔ͔΋
    •ϑΟʔυόοΫ͕͋ͬͯษڧʹͳͬͨΓ͢Δ
    εΫϦϓτσϏϡʔ
    

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30. •`ʢόοΫΫΥʔτʣ
    •ίϚϯυͱ࣮ͯ͠ߦ͞Εɺͦͷඪ४ग़ྗ͕จࣈྻͱͯ͠༩͑ΒΕΔ
    •͜ͷதͷจࣈྻ͸μϒϧΫΥʔτͱಉ༷ͷղऍͱࣜల։͕ߦΘΕΔ
    ΂ΜΓͳಓ۩ͨͪ
    Ϧςϥϧ 3VCZϦϑΝϨϯεϚχϡΞϧ
    
    IUUQTEPDTSVCZMBOHPSHKBEPDTQFDqJUFSBMIUNMDPNNBOE
    files = `git grep -l "included" -- 'app/controllers'`
    `git commit -m 'Inline #{namespace}::#{module_name}'`
    

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31. •git grep
    •git ؅ཧԼͷϑΝΠϧΛ grep
    •ਖ਼نදݱͱ͔σΟϨΫτϦࢦఆ(include/exclude)ͱ͔
    ͍ΖΜͳΦϓγϣϯ͕͋ͬͯ΂ΜΓ
    ΂ΜΓͳಓ۩ͨͪ
    files = `git grep -l "included" -- 'app/controllers'`
    

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32. •File.read
    •ϑΝΠϧಡΈࠐΈ
    •ϑΝΠϧύε͕Θ͔Ε͹ಡΈࠐΜͰจࣈྻͱͯ͠ॲཧͰ͖Δ
    ΂ΜΓͳಓ۩ͨͪ
    src = File.read File.expand_path(filename)
    *0SFBE 3VCZϦϑΝϨϯεϚχϡΞϧ
    
    IUUQTEPDTSVCZMBOHPSHKBNFUIPE*0JSFBEIUNM
    

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33. •String#scan
    •Ϩγʔόʹର͠ਖ਼نදݱΛ܁Γฦ͠Ϛον͠ɺ෦෼จࣈྻͷ഑ྻΛฦ͢
    •Ϛονάϧʔϓ΋΂ΜΓͦ͏
    ΂ΜΓͳಓ۩ͨͪ
    4USJOHTDBO 3VCZϦϑΝϨϯεϚχϡΞϧ
    
    IUUQTEPDTSVCZMBOHPSHKBNFUIPE4USJOHJTDBOIUNM
    methods = src.scan(/def (.*)$/).flatten
    

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34. •sed
    •จࣈྻΛஔ׵ͨ͠Γ࡟আͨ͠ΓςΩετॲཧͷͰ͖ΔίϚϯυ
    •ϫϯϥΠφʔͰಛʹ΂ΜΓ
    ΂ΜΓͳಓ۩ͨͪ
    TFEίϚϯυcίϚϯυͷ࢖͍ํ -JOVY
    cIZESPDVMͷϝϞ
    IUUQTIZESPDVMHJUIVCJPXJLJDPNNBOETTFEIUNM
    `sed -i '' '#{line}d' #{filename}`
    

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35. DBTF
    •1Օॴ͔Β͔͠ݺ͹Ε͍ͯͳ͍ϞδϡʔϧΛ࡟আͯ͠ΠϯϥΠϯʹ͍ͨ͠
    

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36. DBTF
    •1Օॴ͔Β͔͠ݺ͹Ε͍ͯͳ͍ϞδϡʔϧΛ࡟আͯ͠ΠϯϥΠϯʹ͍ͨ͠
    •FatίϯτϩʔϥରࡦʢͨͿΜʣͰϝιουΛϞδϡʔϧʹ੾Γग़͍ͯ͠Δ
    •ίʔυ͕௥͍ͮΒ͍
    •ϦϑΝΫλϦϯά࣌ʹϞδϡʔϧશ෦֬ೝ͢Δඞཁ͕͋ͬͯίετ
    

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37. DBTF
    

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38. •String#remove!
    •จࣈྻ΍ਖ਼نදݱΛड͚औΓɺϚονͨ͠จࣈྻΛ܁Γฦ͠࡟আ͢Δ
    •ࡶʹ࢖͑Δॻ͖৺஍͕ͱͯ΋͖͢
    ΂ΜΓͳಓ۩ͨͪ
    SFNPWF 4USJOH
    "1*EPDL
    IUUQTBQJEPDLDPNSBJMTW4USJOHSFNPWF
    target_src.remove!(
    /module .*#{module_name}$/,
    /^\s*extend ActiveSupport::Concern/,
    /^\s*included do/
    )
    

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39. •String#sub!
    •จࣈྻ΍ਖ਼نදݱΛड͚औΓɺϚονͨ͠࠷ॳͷจࣈྻΛஔ׵͢Δ
    •ϑΝΠϧ A ͷ಺༰ΛϑΝΠϧ B ʹ࣋ͬͯ͘Δ࣌ʹ΂ΜΓ
    ΂ΜΓͳಓ۩ͨͪ
    4USJOHTVC 3VCZϦϑΝϨϯεϚχϡΞϧ
    
    IUUQTEPDTSVCZMBOHPSHKBNFUIPE4USJOHJTVCIUNM
    src.sub!(/^\s*include #{module_name}$/, target_src)
    

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40. •String#[]
    •ୈҰҾ਺ʹਖ਼نදݱɺୈೋҾ਺ʹintegerΛऔͬͯ
    ୈೋҾ਺൪໨ͷׅހʹϚον͢Δ࠷ॳͷ෦෼จࣈྻΛฦ͢
    ΂ΜΓͳಓ۩ͨͪ
    4USJOH<> 3VCZϦϑΝϨϯεϚχϡΞϧ
    
    IUUQTEPDTSVCZMBOHPSHKBNFUIPE4USJOHJCEIUNM
    namespace = src[/class (.*?)Controller/, 1]
    

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41. DBTF
    •RailsͷϞσϧͷΠϯελϯεϝιουͷ͏ͪ
    ಛఆͷจࣈྻΛؚΉϞσϧͱϝιουΛྻڍ͍ͨ͠
    

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42. DBTF
    

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43. •rails runner
    •Rails ͷจ຺Ͱ Ruby ίʔυΛ࣮ߦͰ͖Δ
    •Rails ʹฉ͘ͱ͍Ζ͍Ζڭ͑ͯ͘ΕΔ
    ΂ΜΓͳಓ۩ͨͪ
    3BJMTͷίϚϯυϥΠϯπʔϧ3BJMTΨΠυ
    IUUQTSBJMTHVJEFTKQDPNNBOE@MJOFIUNMSBJMTSVOOFS
    rails runner script.rb
    

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44. •Object#methods, Module#instance_methods
    •Ϩγʔό͕͍࣋ͬͯΔϝιου / ΠϯελϯεϝιουΛҰ๬͢Δ
    ΂ΜΓͳಓ۩ͨͪ
    0CKFDUNFUIPET 3VCZϦϑΝϨϯεϚχϡΞϧ
    
    IUUQTEPDTSVCZMBOHPSHKBNFUIPE0CKFDUJNFUIPETIUNM
    .PEVMFJOTUBODF@NFUIPET 3VCZϦϑΝϨϯεϚχϡΞϧ
    
    IUUQTEPDTSVCZMBOHPSHKBNFUIPE.PEVMFJJOTUBODF@NFUIPETIUNM
    klass.instance_methods.select { |method| method.to_s.start_with? ‘awesome' }
    

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45. •Method#source_location
    •ϝιου͕ ruby Ͱఆٛ͞Ε͍ͯΔ৔߹ίʔυͷϑΝΠϧ໊ͱߦ൪߸Λฦ͢
    •ϝιου͕ C Ͱఆٛ͞Ε͍ͯΔ৔߹ nil Λฦ͢
    •e.g. ϓϩμΫγϣϯίʔυͰఆٛ͞Εͨಛఆͷ໊લͷϝιουΛநग़͢Δ
    ΂ΜΓͳಓ۩ͨͪ
    .FUIPETPVSDF@MPDBUJPO 3VCZϦϑΝϨϯεϚχϡΞϧ
    
    IUUQTEPDTSVCZMBOHPSHKBNFUIPE.FUIPEJTPVSDF@MPDBUJPOIUNM
    if klass.instance_method(:awesome).source_location.first.include? "my_app"
    

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46. •Method#source
    •ruby Ͱॻ͔ΕͨϝιουͷίʔυΛऔಘ͢Δ
    •display ΛݺͿͱਓؒʹ༏͘͠ग़ྗ͢Δ
    ΂ΜΓͳಓ۩ͨͪ
    NFUIPE@TPVSDFNFUIPE@TPVSDFSCBUWuCBOJTUFSNFUIPE@TPVSDF
    IUUQTHJUIVCDPNCBOJTUFSNFUIPE@TPVSDFCMPCWMJCNFUIPE@TPVSDFSC--
    if klass.instance_method(method).source =~ /\bhi\b/
    

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47. ·ͱΊ
    •εΫϦϓτ͸΂ΜΓ
    •.rb ϑΝΠϧ΋ͨͩͷจࣈྻ
    •Ruby ΍ Rails ͸͍ΖΜͳ͜ͱΛ஌͍ͬͯΔ
    •;ͩΜ࢖͍ͬͯΔϝιου΋ݟํΛม͑Δͱੈք͕޿͕Δ
    

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48. ·ͱΊ
    ୀ۶ͳ͜ͱ͸ Ruby ʹ͓ئ͍ͯ͠
    ͓΋͠Ζ͍͜ͱΛ΍Ζ͏
    

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49. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠
    

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