Work around Dart custom lint rule

Flutter Meetup Osaka #2

Transcript

1. Dart ಠࣗLintϧʔϧ΁ͷ ϫʔΫΞϥ΢ϯυ 2020/02/28 Flutter Meetup Osaka #2 tomocy (@towocy)
2. ੩తղੳͱ͸
3. ੩తղੳ ࣮ߦϑΝΠϧΛ࣮ߦ͢Δ͜ͱͳ͘ ղੳΛߦ͏͜ͱ https://ja.wikipedia.org/wiki/%E9%9D%99%E7%9A%84%E3%82%B3%E3%83%BC%E3%83%89%E8%A7%A3%E6%9E%90
4. ੩తղੳΛར༻͢Δ͜ͱͰ ιʔείʔυͷ ิ׬΍ϑΥʔϚοτ͕Ͱ͖Δ
5. Lint ιʔείʔυʹજΉ໰୊Λ ݕग़ɺࢦఠ͢Δ
7. Lint ιʔείʔυʹજΉ໰୊Λ ݕग़ɺࢦఠ͢Δ
8. Lint ιʔείʔυʹજΉ໰୊Λ ݕग़ɺࢦఠ͢Δ
9. analysis_options.yaml
10. analysis_opsions.yaml LintϧʔϧΛྻڍͯ͠ ݕग़ɺࢦఠͷର৅ΛఆΊΔ
11. ಠࣗLintϧʔϧ
12. ಠࣗLintϧʔϧ ެࣜҎ֎ͷLintϧʔϧ΋ཉ͍͠
13. ಠࣗLintϧʔϧ dart-lang/linter#697ʹͯݕ౼த (2020/02/28࣌఺) https://github.com/dart-lang/linter/issues/697
14. ಠࣗLintϧʔϧ ͲͷΑ͏ʹ࣮ݱ͞ΕΔʹͤΑ dart-lang/linterΛ࢖͏͜ͱʹͳΓͦ͏
16. LintRuleʢϧʔϧͷ໊લɺઆ໌ɺର৅ͷNodeΛઃఆʣ Visitorʢର৅ͷNodeʹର͢ΔݕূΛ࣮૷ʣ ʢSimpleAstVisitorҎ֎ʹ΋Visitor͕͋Δʣ
18. 1. LintRuleଆͰର৅ͷNodeΛొ࿥͓ͯ͘͠
19. 2. VisitorଆͰͦͷNodeΛݕࠪ͢Δ 1. LintRuleଆͰର৅ͷNodeΛొ࿥͓ͯ͘͠
20. ಠࣗLintϧʔϧ΁ͷ ϫʔΫΞϥ΢ϯυ
21. WidgetͷίϯετϥΫλʔͷҾ਺͸ ׳शతʹ໊લ෇͖Ҿ਺ʹ͢Δ https://api.flutter.dev/flutter/widgets/StatelessWidget-class.html
22. WidgetͷίϯετϥΫλʔͷҾ਺͸ ׳शతʹ໊લ෇͖Ҿ਺ʹ͢Δ ίϯετϥΫλʔͷҾ਺໊͕લ෇͖Ҿ਺Ͱͳ͍WidgetΛ ໰୊ͱͯ͠ࢦఠ͢ΔLintϧʔϧ https://api.flutter.dev/flutter/widgets/StatelessWidget-class.html
23. ಠࣗLintϧʔϧ use named parameters in widget constructors
26. tool/rule.dart Lintϧʔϧͷ਽ܗͱͦͷςετΛੜ੒͢Δ Lintϧʔϧͷ໊લ
28. ςετ LintΤϥʔΛग़ͯ͠ཉ͍͠ߦʹ // Lint ίϝϯτΛॻ͘
30. Line Rule Lintϧʔϧͷ આ໌ͱৄࡉ
32. Lint Rule Lintͷର৅ͷNodeΛొ࿥
33. Lint Rule Lintͷର৅ͷNodeΛొ࿥ ࠓճ͸ΫϥεఆٛͷNodeΛղੳ͢Δ
35. Visitor ର৅ͷNodeͷղੳ
36. Visitor ର৅ͷNodeͷղੳ WidgetͷίϯετϥΫλʔͷҾ਺͕ ໊લ෇͖Ҿ਺Ͱ͋Δ͔Λ֬ೝ
41. ·ͱΊ
42. - LintͰίʔυͷ໰୊Λݕग़ - analysis_options.yamlͰ ɹLintϧʔϧΛ૊Έ߹Θͤ - ಠࣗLintϧʔϧ͸·ͩඇެࣜ
43. ϧʔϧΛकָͬͯ͘͠Flutter/Dart!
44. ͋Γ͕ͱ͏͍͟͝·ͨ͠
45. Links ੩తղੳ https://api.flutter.dev/flutter/widgets/StatelessWidget-class.html Issue ‘Support custom lint rule' https://api.flutter.dev/flutter/widgets/StatelessWidget-class.html Stateless Widget https://api.flutter.dev/flutter/widgets/StatelessWidget-class.html Lint rule ‘use named parameters in widget constructors’ https://github.com/tomocy/dart-linter/tree/use_named_parameters_in_widget_constructors