Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Kotlin Static Analysis - Kotlin Everywhere 2019
Search
Matheus Cassiano Candido
October 05, 2019
Programming
120
0
Share
Kotlin Static Analysis - Kotlin Everywhere 2019
Slides for my Kotlin Everywhere talk.
Matheus Cassiano Candido
October 05, 2019
More Decks by Matheus Cassiano Candido
See All by Matheus Cassiano Candido
JUnit rules and test parameterization
mcassiano
0
130
unraveling custom drawing
mcassiano
0
88
The Basis of Android Threading: Loopers and Handlers
mcassiano
1
130
Hackeando sua próxima entrevista: dicas para conseguir seu próximo estágio ou emprego
mcassiano
1
98
text spans: what, why and how?
mcassiano
0
690
Navigation patterns on Android and something new
mcassiano
3
400
Como conseguir o estágio (ou emprego) dos sonhos
mcassiano
0
52
Databinding e padrão MVVM
mcassiano
1
29
Desenvolvimento móvel: práticas de sucesso
mcassiano
0
31
Other Decks in Programming
See All in Programming
Mastering Event Sourcing: Your Parents Holidayed in Yugoslavia
super_marek
0
130
Laravel Nightwatchの裏側 - Laravel公式Observabilityツールを支える設計と実装
avosalmon
1
300
Feature Toggle は捨てやすく使おう
gennei
0
400
20260313 - Grafana & Friends Taipei #1 - Kubernetes v1.36 的開發雜記:那些困在 Alpha 加護病房太久的 Metrics
tico88612
0
240
安いハードウェアでVulkan
fadis
1
870
AWS×クラウドネイティブソフトウェア設計 / AWS x Cloud-Native Software Design
nrslib
16
3.5k
S3ストレージクラスの「見える」「ある」「使える」は全部違う ─ 体験から見た、仕様の深淵を覗く
ya_ma23
0
1.2k
「接続」—パフォーマンスチューニングの最後の一手 〜点と点を結ぶ、その一瞬のために〜
kentaroutakeda
5
2.4k
今年もTECHSCOREブログを書き続けます!
hiraoku101
0
210
CS教育のDX AIによる育成の効率化
niftycorp
PRO
0
180
PHPで TLSのプロトコルを実装してみる
higaki_program
0
720
野球解説AI Agentを開発してみた - 2026/02/27 LayerX社内LT会資料
shinyorke
PRO
0
380
Featured
See All Featured
Building Applications with DynamoDB
mza
96
7k
Design in an AI World
tapps
0
190
What’s in a name? Adding method to the madness
productmarketing
PRO
24
4k
First, design no harm
axbom
PRO
2
1.2k
Beyond borders and beyond the search box: How to win the global "messy middle" with AI-driven SEO
davidcarrasco
3
98
The B2B funnel & how to create a winning content strategy
katarinadahlin
PRO
1
320
The Director’s Chair: Orchestrating AI for Truly Effective Learning
tmiket
1
140
Designing for humans not robots
tammielis
254
26k
SEOcharity - Dark patterns in SEO and UX: How to avoid them and build a more ethical web
sarafernandez
0
160
A Guide to Academic Writing Using Generative AI - A Workshop
ks91
PRO
1
250
Believing is Seeing
oripsolob
1
100
sira's awesome portfolio website redesign presentation
elsirapls
0
200
Transcript
Mantendo código Kotlin seguro: de ponta a ponta Matheus C.
Candido Mobile Software Engineer @ Uber
Agenda 01 Análise estática 02 Ferramentas 03 Arquitetura 04 Customização
05 Automação
Análise estática Static program analysis is the analysis of computer
software that is performed without actually executing programs
Ktlint Simples, drop-in
Ktlint Simples, drop-in Zero configuração
Ktlint Simples, drop-in Zero configuração Code styling*
Ktlint Simples, drop-in Zero configuração Code styling* Formatador
Ktlint Simples, drop-in Zero configuração Code styling* Formatador Baseado no
Kotlin Style Guide, mas suporta Android Style Guide
Detekt Foco no detalhe
Detekt Foco no detalhe Totalmente configurável
Detekt Foco no detalhe Totalmente configurável Code styling
Detekt Foco no detalhe Totalmente configurável Code styling Performance
Detekt Foco no detalhe Totalmente configurável Code styling Performance Tratamento
de exceções
Android Lint Java, Kotlin e Resources
Android Lint Java, Kotlin e Resources Regras especiais para Android
Android Lint Java, Kotlin e Resources Regras especiais para Android
Super extensível
Android Lint Java, Kotlin e Resources Regras especiais para Android
Super extensível Performance
Android Lint Java, Kotlin e Resources Regras especiais para Android
Super extensível Performance Análise de recursos duplicados/não utilizados
Android Lint Java, Kotlin e Resources Regras especiais para Android
Super extensível Performance Análise de recursos duplicados/não utilizados Funciona para projetos não-Android
Warning vs. Errors
Baseline
Ignorando issues conhecidos @SuppressLint("NewApi") @Suppress("NewApi")
Arquitetura
Arquitetura
None
Arquitetura
Criando novas regras
Issue registry @AutoService(IssueRegistry::class) class Registry() :fIssueRegistry() {f override val issues:
List<Issue> = listOf(GetDrawableDetector.ISSUE) override val api: Int = CURRENT_API }f
Issue registry @AutoService(IssueRegistry::class) class Registry() :fIssueRegistry() {f override val issues:
List<Issue> = listOf(GetDrawableDetector.ISSUE) override val api: Int = CURRENT_API }f
Issue registry @AutoService(IssueRegistry::class) class Registry() :fIssueRegistry() {f override val issues:
List<Issue> = listOf(GetDrawableDetector.ISSUE) override val api: Int = CURRENT_API }f
Criando um detector /** *fDetector to check for usages of
`ResourcesCompat.getDrawable` or `ContextCompat.getDrawable`. */ class GetDrawableDetector :fDetector(), SourceCodeScanner {f companion object {f val ISSUE =fIssue.create(f id =fISSUE_ID, briefDescription =fBRIEF_DESCRIPTION, explanation =fLINT_ERROR_MESSAGE, category =fCategory.CORRECTNESS,
Descrição da Issue val ISSUE =fIssue.create(f id =fISSUE_ID, briefDescription =fBRIEF_DESCRIPTION,
explanation =fLINT_ERROR_MESSAGE, category =fCategory.CORRECTNESS, priority =f6, severity =fSeverity.ERROR, implementation =fcreate<GetDrawableDetector>()) }f override fun getApplicableMethodNames() = listOf("getDrawable") override fun visitMethodCall(f context:fJavaContext,
Descrição da Issue val ISSUE =fIssue.create(f id =fISSUE_ID, briefDescription =fBRIEF_DESCRIPTION,
explanation =fLINT_ERROR_MESSAGE, category =fCategory.CORRECTNESS, priority =f6, severity =fSeverity.ERROR, implementation =fcreate<GetDrawableDetector>()) }f override fun getApplicableMethodNames() = listOf("getDrawable") override fun visitMethodCall(f context:fJavaContext,
Descrição da Issue val ISSUE =fIssue.create(f id =fISSUE_ID, briefDescription =fBRIEF_DESCRIPTION,
explanation =fLINT_ERROR_MESSAGE, category =fCategory.CORRECTNESS, priority =f6, severity =fSeverity.ERROR, implementation =fcreate<GetDrawableDetector>()) }f override fun getApplicableMethodNames() = listOf("getDrawable") override fun visitMethodCall(f context:fJavaContext,
Descrição da Issue val ISSUE =fIssue.create(f id =fISSUE_ID, briefDescription =fBRIEF_DESCRIPTION,
explanation =fLINT_ERROR_MESSAGE, category =fCategory.CORRECTNESS, priority =f6, severity =fSeverity.ERROR, implementation =fcreate<GetDrawableDetector>()) }f override fun getApplicableMethodNames() =f listOf("getDrawable") override fun visitMethodCall(f context:fJavaContext,
Filtrando a entrada overrideffunfgetApplicableMethodNames() =f listOf("getDrawable")f override fun visitMethodCall(f context:fJavaContext,
node:fUCallExpression, method:fPsiMethod ){f iff(! getApplicableMethodNames().contains(node.methodName))freturn if (node.methodName == "getDrawable" && isBlacklisted(context.evaluator, node)) {f context.report(ISSUE, context.getLocation(node),
Detectando os problemas override fun visitMethodCall(f context:fJavaContext, node:fUCallExpression, method:fPsiMethod ){f
iff(! getApplicableMethodNames().contains(node.methodName))freturn if (node.methodName == "getDrawable" && isBlacklisted(context.evaluator, node)) {f context.report(ISSUE, context.getLocation(node), LINT_ERROR_MESSAGE) }f
Detectando os problemas iff(! getApplicableMethodNames().contains(node.methodName))freturn if (node.methodName == "getDrawable" &&
isBlacklisted(context.evaluator, node)) {f context.report(ISSUE, context.getLocation(node), LINT_ERROR_MESSAGE) }f }f private fun isBlacklisted():fBoolean {f return evaluator.isMemberInClass(node.resolve(), "androidx.core.content.ContextCompat") ||f
Detectando os problemas iff(! getApplicableMethodNames().contains(node.methodName))freturn if (node.methodName == "getDrawable" &&
isBlacklisted(context.evaluator, node)) {f context.report(ISSUE, context.getLocation(node), LINT_ERROR_MESSAGE) }f }f private fun isBlacklisted():fBoolean {f return evaluator.isMemberInClass(node.resolve(), "androidx.core.content.ContextCompat") ||f
Detectando os problemas context.report(ISSUE, context.getLocation(node), LINT_ERROR_MESSAGE) }f }f private fun
isBlacklisted():fBoolean {f return evaluator.isMemberInClass(node.resolve(),f "androidx.core.content.ContextCompat") ||f evaluator.isMemberInClass(node.resolve(), "androidx.core.content.res.ResourcesCompat")f }f }f
Usando a nova regra // no build.gradle dos outros projetos
dependencies {f lintChecks project(":meu_detector") }f
Usando a nova regra // no build.gradle dos outros projetos
dependencies {f lintChecks project(":meu_detector") }f
Relatórios
Relatórios
Relatórios
Evolução do código
None
Automação
Automação https://bit.cassiano.me/sa-automation
Automação https://bit.cassiano.me/sa-automation
Automação https://bit.cassiano.me/sa-comment-machine
Automação https://bit.cassiano.me/sa-git-hooks
Automação https://bit.cassiano.me/sa-git-hooks
Resumo Combine as ferramentas e aproveite o melhor de cada
uma
Resumo Combine as ferramentas e aproveite o melhor de cada
uma Aplique as regras que façam sentido para seu contexto
Resumo Combine as ferramentas e aproveite o melhor de cada
uma Aplique as regras que façam sentido para seu contexto Automatize a formatação dos arquivos e partes do code review
https://bit.cassiano.me/sa-kotlin-conf-17-talk
https://bit.cassiano.me/sa-kotlin-conf-18-talk
…perguntas?