Gradle, je t’aime: moi non plus.

Un outil de build de qualité est essentiel dans un projet IT. On attend de lui qu’il soit rapide, facile à configurer et qu’il se fasse oublier le reste du temps. Même si l’écosystème Java utilise encore fortement Maven, Gradle est une alternative à considérer, particulièrement avec les dernières fonctionnalités apportées.

Pourquoi avoir choisi Gradle ? Quelles sont les fonctionnalités de l’outil qui nous satisfont le plus ? Quelles sont nos bonnes pratiques ? Quelles sont les problèmes que nous avons rencontrés ? Comment nos builds sont maintenant organisés avec cet outil ?

Cette session répondra à ces questions et vous aidera à choisir votre prochain outil de build.

Devoxx France 2019 - 19 Avril 2019

Transcript

1. Gradle, je t’aime, 

   … moi non plus
   @JeremMartinez - @dwursteisen
   

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3. David Wursteisen
   Jeremie Martinez
   

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4. Satisfait de
   votre banque ?
   

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5. Une banque
   pour entreprise
   

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6. Nous construisons notre propre
   CBS.
   

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7. Nous construisons notre propre
   Core Banking System.
   

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8. Data
   Payments
   Backend
   Core
   

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9. Data
   Payments
   Backend
   Core
   Created
   Deposited
   Withdraw
   Withdraw
   Closed
   WRITE
   Event store
   Reporting
   Accounting
   Regulators
   Data sciences
   GDPR
   Users
   Transfers
   Customers
   Collections
   Cards
   KYC
   Limit controller
   

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10. Un outil de build est comme une
    banque. On ne choisit pas le meilleur
    mais le moins pire.
    Un outil de build est comme une
    banque. On ne choisit pas le meilleur
    mais le moins pire.
    

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11. Choix de l’outil de build : 2017
    Choix de l’outil de build : 2017
    

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12. Bazel Buck
    

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13. Construction
    incrementale
    DSL en Groovy
    Dynamisme
    du produit
    

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14. Système à base de tâche.
    

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15. Tâche
    Entrée Sortie
    

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16. Assemble
    

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17. Jar Assemble
    

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18. Compile Jar Assemble
    

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19. Compile Jar Assemble
    

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20. Compile Jar Assemble
    Compile
    [ Up-to-date ] [ Up-to-date ] [ Up-to-date ]
    Jar Assemble
    

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21. On ne construit que le
    nécessaire.
    On ne construit que le
    nécessaire.
    

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22. Développeur
    Mainteneur de scripts
    Build master
    1
    2
    3
    

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23. Développeur
    Mainteneur de scripts
    Build master
    1
    

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24. Support IDE.
    

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30. Gradle Wrapper.
    

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31. View Slide

32. distributionBase=GRADLE_USER_HOME
    distributionPath=wrapper/dists
    zipStoreBase=GRADLE_USER_HOME
    zipStorePath=wrapper/dists
    distributionUrl=https://services.gradle.org/distributions/gradle-5.3-bin.zip
    

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33. distributionBase=GRADLE_USER_HOME
    distributionPath=wrapper/dists
    zipStoreBase=GRADLE_USER_HOME
    zipStorePath=wrapper/dists
    distributionUrl=https://services.gradle.org/distributions/gradle-5.3-bin.zip
    

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34. distributionBase=GRADLE_USER_HOME
    distributionPath=wrapper/dists
    zipStoreBase=GRADLE_USER_HOME
    zipStorePath=wrapper/dists
    distributionUrl=https://internal/gradle/gradle/gradle/5.3/gradle-5.3-bin.zip
    

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35. distributionBase=GRADLE_USER_HOME
    distributionPath=wrapper/dists
    zipStoreBase=GRADLE_USER_HOME
    zipStorePath=wrapper/dists
    distributionUrl=https://internal/gradle/gradle/gradle/5.3/gradle-5.3-bin.zip
    distributionSha256Sum=53b71812f18cdb2777e9f1b2a0f2038683907c90bdc406bc6
    

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36. distributionBase=GRADLE_USER_HOME
    distributionPath=wrapper/dists
    zipStoreBase=GRADLE_USER_HOME
    zipStorePath=wrapper/dists
    distributionUrl=https://internal/gradle/gradle/gradle/5.3/gradle-5.3-bin.zip
    distributionSha256Sum=53b71812f18cdb2777e9f1b2a0f2038683907c90bdc406bc6
    

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37. distributionhttps://internal/gradle/gradle/gradle/5.3/gradle-5.3-bin.zip
    distributionSha256Sum=53b71812f18cdb2777e9f1b2a0f2038683907c90bdc406bc6
    Ne sont pas des variables
    d’environment valides !
    

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39. 4 Go =
    

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40. Gestion des dépendances
    

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41. src
    main
    module
    kotlin
    test
    kotlin
    resources
    custom
    kotlin
    

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42. dependencies {
    }
    

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43. dependencies {
    compile("io.swagger:swagger-annotations:1.5.0")
    }
    

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44. dependencies {
    compile("io.swagger:swagger-annotations:1.5.0")
    compile(group = "io.swagger", name = "swagger-annotations", version = "1.5.0")
    }
    

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45. dependencies {
    compile("io.swagger:swagger-annotations:1.5.0")
    compile(group = "io.swagger", name = "swagger-annotations", version = "1.5.0")
    compile(project(":otherProject"))
    }
    

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46. dependencies {
    compile("io.swagger:swagger-annotations:1.5.0")
    compile(group = "io.swagger", name = "swagger-annotations", version = "1.5.0")
    compile(project(":otherProject"))
    testCompile("io.mockk:mockk:1.9.3")
    }
    

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47. dependencies {
    compile("io.swagger:swagger-annotations:1.5.0")
    compile(group = "io.swagger", name = "swagger-annotations", version = "1.5.0")
    compile(project(":otherProject"))
    testCompile("io.mockk:mockk:1.9.3")
    customCompile("org.codehaus.janino:janino:2.5.16")
    }
    

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48. customCompile("org.codehaus.janino:janino:2.5.16")
    sourceSet
    configuration
    

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49. compile("org.codehaus.janino:janino:2.5.16")
    compileOnly("org.codehaus.janino:janino:2.5.16")
    runtime("org.codehaus.janino:janino:2.5.16")
    annotationProcessor("org.codehaus.janino:janino:2.5.16")
    

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50. compile("org.codehaus.janino:janino:2.5.16")
    compileOnly("org.codehaus.janino:janino:2.5.16")
    runtime("org.codehaus.janino:janino:2.5.16")
    annotationProcessor("org.codehaus.janino:janino:2.5.16")
    

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51. compile("org.codehaus.janino:janino:2.5.16")
    compileOnly("org.codehaus.janino:janino:2.5.16")
    runtime("org.codehaus.janino:janino:2.5.16")
    annotationProcessor("org.codehaus.janino:janino:2.5.16")
    runtimeOnly("org.codehaus.janino:janino:2.5.16")
    api("org.codehaus.janino:janino:2.5.16")
    implementation("org.codehaus.janino:janino:2.5.16")
    

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52. runtimeOnly("org.codehaus.janino:janino:2.5.16")
    api("org.codehaus.janino:janino:2.5.16")
    implementation("org.codehaus.janino:janino:2.5.16")
    

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53. mailer-service
    mailer-api amazing-mail
    com.lib.mailer.api
    com.lib.mailer.impl
    MailerService
    MailerApi
    webapp
    fr.amazing.client
    ClientMail
    

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54. mailer-service
    mailer-api amazing-mail
    com.lib.mailer.api
    com.lib.mailer.impl
    MailerService
    MailerApi
    webapp
    fr.amazing.client
    ClientMail
    compilation
    compilation
    compilation
    est visible
    est visible
    implementation
    implementation
    api
    

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55. Repositories.
    

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56. repositories {
    }
    

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57. repositories {
    mavenCentral()
    }
    

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58. repositories {
    mavenCentral()
    jcenter()
    google()
    }
    

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59. repositories {
    mavenCentral()
    jcenter()
    google()
    maven { url = uri("https://oss.sonatype.org/content/repositories/snapshots/") }
    }
    

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60. repositories {
    mavenCentral()
    jcenter()
    google()
    maven { url = uri("https://oss.sonatype.org/content/repositories/snapshots/") }
    maven {
    url = uri("https://internal")
    content {
    includeGroupByRegex("com\\.mycompany.*")
    }
    }
    }
    Selection des
    dépendances
    

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61. repositories {
    mavenCentral()
    jcenter()
    google()
    maven { url = uri("https://oss.sonatype.org/content/repositories/snapshots/") }
    maven {
    url = uri("https://internal")
    content {
    includeGroupByRegex("com\\.mycompany.*")
    }
    }
    ivy { url = uri("https://oss.sonatype.org/content/repositories/releases/") }
    flatDir { dirs("libs") }
    }
    

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62. repositories {
    mavenCentral()
    jcenter()
    google()
    maven { url = uri("https://oss.sonatype.org/content/repositories/snapshots/") }
    maven {
    url = uri("https://internal")
    content {
    includeGroupByRegex("com\\.mycompany.*")
    }
    }
    ivy { url = uri("https://oss.sonatype.org/content/repositories/releases/") }
    flatDir { dirs("libs") }
    mavenLocal()
    }
    Devrait être inutile
    

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63. projectA projectB
    mavenLocal
    publishToMavenLocal
    Dépend de…
    

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64. Composite Build.
    

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65. projectA projectB
    compositeBuild
    includeBuild(…)
    

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66. projectA projectB
    dependencySource
    gitRepository(https://github.com/…)
    version = branch/tag
    

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67. mailer 1.0.0 Master dev/feature
    superProject
    otherProject
    projectZ
    

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68. mailer 1.0.0 Master dev/feature
    superProject OK
    otherProject OK
    projectZ OK
    

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69. mailer 1.0.0 master
    superProject OK OK
    otherProject OK OK
    projectZ OK KO
    Dependency sources
    

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70. mailer 1.0.0 master dev/feature
    superProject OK OK KO
    otherProject OK OK OK
    projectZ OK KO OK
    Dependency sources Dependency sources
    

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71. Performance.
    

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73. org.gradle.caching=true
    org.gradle.configureondemand=true
    org.gradle.jvmargs=-Xmx2048M -Xms2048M
    org.gradle.parallel=true
    Réutilisation des résultats de build
    Execution des tâches en parallèle
    Utilisation d’un maximum de mémoire
    Configuration uniquement des
    tâches nécessaires
    

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74. View Slide

75. Daemon Gradle 5.1.1
    Daemon Gradle 4.10
    

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78. Simplicité
    d’utilisation
    Performance
    Fonctionnalités
    

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79. Développeur
    Mainteneur de scripts
    Build master
    2
    

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80. Data
    Payments
    Backend
    Core
    Created
    Deposited
    Withdraw
    Withdraw
    Closed
    WRITE
    Event store
    Reporting
    Accounting
    Regulators
    Data sciences
    GDPR
    Users
    Transfers
    Customers
    Collections
    Cards
    KYC
    Limit controller
    

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81. Data
    Payments Backend
    Reporting
    Accounting
    Regulators
    Data sciences
    GDPR
    Users
    Transfers
    Customers
    Collections
    Cards
    KYC
    Limit controller
    

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82. Backend
    GDPR
    Users
    Customers
    KYC
    Limit controller
    kotlin
    nexus
    release
    lint
    Configuration
    

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83. Plugin interne.
    

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84. apply(plugin = "com.your.company.commons")
    

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85. View Slide

86. Configurer une seule fois,
    Exécuter partout.
    

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87. buildSrc.
    

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88. View Slide

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91. View Slide

92. src
    main
    buildSrc
    kotlin
    myProject
    

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93. open class MyExtension(var yourName: String = "not defined!")
    

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94. open class MyExtension(var yourName: String = "not defined!")
    class MyPlugin : Plugin {
    override fun apply(project: Project) {
    }
    }
    

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95. open class MyExtension(var yourName: String = "not defined!")
    class MyPlugin : Plugin {
    override fun apply(project: Project) {
    val exts = project.extensions.create("myPlugin", MyExtension::class)
    }
    }
    

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96. open class MyExtension(var yourName: String = "not defined!")
    class MyPlugin : Plugin {
    override fun apply(project: Project) {
    val exts = project.extensions.create("myPlugin", MyExtension::class)
    project.task("myTask") {
    doLast {
    println("hello ${exts.yourName}")
    }
    }
    }
    }
    

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97. apply()
    configure {
    yourName = "Devoxx France"
    }
    

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98. View Slide

99. DSL.
    

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100. Groovy DSL.
     

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101. sourceSets {
     }
     Groovy
     

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102. sourceSets {
     integrationTest {
     }
     }
     DSL Dynamique
     Groovy
     

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103. View Slide

104. Type
     safety
     IDE Support
     Navigation
     Refactoring
     

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105. sourceSets {
     integrationTest {
     }
     }
     Groovy
     

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106. sourceSets.create("integrationTest") {
     …
     }
     Kotlin
     

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107. View Slide

108. View Slide

109. View Slide

110. idea {
     project {
     settings {
     runConfigurations {
     "Start Application"(Application) {
     // …
     }
     }
     }
     }
     }
     Groovy
     

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111. idea {
     project {
     this as ExtensionAware
     configure {
     this as ExtensionAware
     configure> {
     // cast to PolymorphicDomainObjectContainer to access the create method used bellow.
     @Suppress("UnstableApiUsage")
     this as PolymorphicDomainObjectContainer
     create("Start Application", Application::class) {
     // …
     }
     }
     }
     }
     }
     
     
     
     Kotlin
     

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112. « Un langage pour
     les gouverner tous. »
     

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113. Migration vers Kotlin DSL.
     

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114. object Versions {
     val assertj = "3.10.0"
     val junit = "4.12"
     val mockito = "2.19.1"
     val mockito_kotlin = "1.6.0"
     val postgres = "42.2.4"
     val prometheus = "0.6.0"
     val springboot = "2.1.3.RELEASE"
     val swagger = "1.5.20"
     }
     

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115. object TestDeps {
     val assertj = "org.assertj:assertj-core:${Versions.assertj}"
     val junit = "junit:junit:${Versions.junit}"
     val mockito = "org.mockito:mockito-core:${Versions.mockito}"
     }
     

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116. dependencies {
     testImplementation(TestDeps.assertj)
     testImplementation(TestDeps.junit)
     testImplementation(TestDeps.mockito)
     }
     

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117. 1. Doublez vos quotes.
     

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118. allprojects {
     group = 'com.margo.backend'
     version = '1.0'
     }
     Groovy
     

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119. allprojects {
     group = 'com.margo.backend'
     version = '1.0'
     }
     Groovy
     

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120. allprojects {
     group = "com.margo.backend"
     version = "1.0"
     }
     Kotlin
     

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121. 2. Explicitez vos assignations.
     

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122. repositories {
     maven { url 'https://plugins.gradle.org/m2/' }
     }
     Groovy
     

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123. repositories {
     maven { url = uri("https://plugins.gradle.org/m2/") }
     }
     Kotlin
     

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124. dependencies {
     compile project(":service")
     }
     Groovy
     

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125. dependencies {
     compile(project(":service"))
     }
     Kotlin
     

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126. val commit by extra { Git.commit() }
     Kotlin
     

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127. object Git {
     fun commit() = Runtime.getRuntime()
     .exec("git rev-parse --short HEAD")
     .inputStream.bufferedReader()
     .readText()
     }
     buildSrc
     

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128. 3. Fichier par fichier.
     

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129. web
     buildSrc
     src
     build.gradle
     settings.gradle
     build.gradle
     src
     build.gradle
     

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130. build.gradle.kts
     web
     buildSrc
     src
     settings.gradle
     build.gradle
     src
     build.gradle
     

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131. settings.gradle.kts
     build.gradle.kts
     web
     buildSrc
     src
     build.gradle
     src
     build.gradle
     

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132. build.gradle.kts
     settings.gradle.kts
     build.gradle.kts
     web
     buildSrc
     src
     src
     build.gradle
     

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133. web
     buildSrc
     src
     build.gradle.kts
     settings.gradle.kts
     build.gradle.kts
     src
     build.gradle.kts
     

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134. Quelques difficultés.
     

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135. 1. Documentation.
     

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137. 2. Exemples.
     

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140. 3. Utilisation avancée.
     

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141. processResources {
     filesMatching('**/*.properties') {
     expand(project.properties)
     }
     }
     Groovy
     

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142. tasks
     .withType(ProcessResources::class)
     .named("processResources")
     .configure {
     filesMatching("**/*.properties") {
     expand(project.properties)
     }
     }
     Kotlin
     

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143. tasks
     .withType(ProcessResources::class)
     .named("processResources")
     .configure {
     filesMatching("**/*.properties") {
     expand(project.properties)
     }
     }
     Kotlin
     

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144. tasks
     .withType(ProcessResources::class)
     .named("processResources")
     .configure {
     filesMatching("**/*.properties") {
     expand(project.properties)
     }
     }
     Kotlin
     

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145. tasks
     .withType(ProcessResources::class)
     .named("processResources")
     .configure {
     filesMatching("**/*.properties") {
     expand(project.properties)
     }
     }
     Kotlin
     

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146. tasks
     .withType(ProcessResources::class)
     .named("processResources")
     .configure {
     filesMatching("**/*.properties") {
     expand(project.properties)
     }
     }
     Kotlin
     

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147. tasks
     .withType(ProcessResources::class)
     .named("processResources")
     .configure {
     filesMatching("**/*.properties") {
     expand(project.properties)
     }
     }
     Kotlin
     

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148. 4. Migration du plugin interne.
     

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149. Si c’était à refaire ?
     

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150. buildSrc
     Performance Plugin interne
     IDE Support
     

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151. Prochaines étapes.
     Consommation
     mémoire
     Build cache
     

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152. Questions ?
     

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