What is the Android Cache Fix plugin and why do I need to solve my own cache misses.

This talk covers why cache misses happen, how to diagnose them, and why Gradle can't always automatically fix them for you. We'll also dive under the hood of the Android Cache Fix plugin to figure out some of the dirtiest cache misses in the Android ecosystem and why they still exist.

Give at Droidcon Berlin October 20, 2021

Transcript

1. Android Cache Fix Plugin
   Nelson Osacky
   and why do I need to solve my own cache misses?
   

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2. Me
   • Previously Android Engineer
   
   
   • Large projects
   
   
   • SoundCloud
   
   
   • Square
   
   
   • Small startups
   
   
   • Gradle Plugin Maintainer
   
   
   • Fladle - Easily Scale Instrumentation Tests on Firebase
   
   
   https://github.com/runningcode/fladle
   
   
   • Gradle Doctor - Actionable Insights for your build
   
   
   https://github.com/runningcode/gradle-doctor
   Solutions Engineer
   

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3. I see a lot of builds
   from 10 person teams to 1000+
   Android, Gradle and Maven
   

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4. • Optimize and understand builds
   
   
   • Increase build stability
   
   
   • Preach Developer Productivity
   

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5. • Improve Gradle ecosystem
   
   
   • Fix issues in open source plugin
   affecting customers
   

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6. • Meet with Google and Jetbrains
   to help prioritize issues
   impacting customers
   

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8. Android Development
   Feature Development Tech Debt
   (There are other things too)
   

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9. Tech Debt
   Refactoring Improving builds
   

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10. Slow builds are Tech Debt
    And it always pays off
    

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11. Cost of Builds
    60s waste * 50 builds / day * 50 devs
    

    = 42 hours lost / day
    

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12. Cost of Builds
    60s waste * 50 builds / day * 50 devs
    

    = 42 hours lost / day
    not including lost focus
    https://gradle.com/roi-calculator
    

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13. Fast Builds Matter
    

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14. Cost of Builds
    60s waste * 50 builds / day * 50 devs
    

    = 42 hours lost / day
    hire 5 new people without paying
    them! no recruiting
    https://gradle.com/roi-calculator
    

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15. Slow builds are Tech Debt
    And it always pays off
    And is easy to justify working on it
    

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17. What is build caching?
    https://docs.gradle.org/current/userguide/build_cache.html
    

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18. JavaCompile task
    Source Files
    Compiler Args
    Dependencies
    Class files
    any task can be made cacheable
    

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19. Cache key
    Source Files
    Compiler Args
    Dependencies
    

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20. Cache key
    Source Files
    Compiler Args
    Dependencies
    Build cache Class files
    

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21. View Slide

22. What is the Android Cache Fix
    plugin?
    

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23. Solves cache misses/issues in the
    Android Gradle Plugin
    

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24. What is a cache miss?
    not "broken" cache
    

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25. "Broken" Cache
    • Cache miss -> Expected a hit but didn't
    
    
    • Cache hit when inputs changed
    
    
    • Missing outputs from cache
    
    
    • etc
    

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26. How to discover a cache miss?
    

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27. Run two identical builds and compare
    ./gradlew assembleDebug
    
    
    ./gradlew assembleDebug
    

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28. Task input comparison
    

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29. How does the Android Cache Fix
    plugin work?
    

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30. Task input comparison
    

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31. Path sensitivity
    Which part of the file path is considered a part of the key
    

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32. CompileLibraryResourcesTask
    Source Files
    Compiler Args
    Dependencies
    

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33. CompileLibraryResourcesTask
    build/intermediates/packaged_res/debug
    Compiler Args
    Dependencies
    

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34. CompileLibraryResourcesTask
    build/intermediates/packaged_res/debug
    

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35. CompileLibraryResourcesTask
    /Users/alice/build/intermediates/packaged_res/debug
    CompileLibraryResourcesTask
    /Users/jenkins/build/intermediates/packaged_res/debug
    

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36. CompileLibraryResourcesTask
    build/intermediates/packaged_res/debug
    

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37. @CacheableTas
    k
    
    abstract class CompileLibraryResourcesTask : NewIncrementalTask() {

    }
    

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38. @CacheableTas
    k
    
    abstract class CompileLibraryResourcesTask : NewIncrementalTask()
    {
    
    @get:InputFile
    s
    
    abstract val mergedLibraryResourcesDir: DirectoryProperty

    }
    

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39. @CacheableTas
    k
    
    abstract class CompileLibraryResourcesTask : NewIncrementalTask()
    {
    
    @get:PathSensitive(PathSensitivity.ABSOLUTE
    )
    
    @get:InputFile
    s
    
    abstract val mergedLibraryResourcesDir: DirectoryProperty

    }
    

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40. @CacheableTas
    k
    
    abstract class CompileLibraryResourcesTask : NewIncrementalTask()
    {
    
    @get:PathSensitive(PathSensitivity.RELATIVE
    )
    
    @get:InputFile
    s
    
    abstract val mergedLibraryResourcesDir: DirectoryProperty

    }
    

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41. How does the cache fix plugin
    workaround this?
    https://issuetracker.google.com/issues/155218379
    
    
    

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42. @AndroidIssue
    (
    
    introducedIn = "4.0.0"
    ,
    
    fixedIn = ['7.0.0-alpha09']
    ,
    
    link = "https://issuetracker.google.com/issues/155218379"
    )
    
    class CompileLibraryResourcesWorkaround implements Workaround
    {
    
    // the workaroun
    d
    
    }
    

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43. @AndroidIssue(
    introducedIn = "4.0.0"
    ,
    
    fixedIn = ['7.0.0-alpha09']
    ,
    
    link = "https://issuetracker.google.com/issues/155218379"
    )
    
    class CompileLibraryResourcesWorkaround implements Workaround
    {
    
    // the workaroun
    d
    
    }
    

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44. @AndroidIssue
    (
    
    introducedIn = "4.0.0"
    ,
    
    fixedIn = ['7.0.0-alpha09']
    ,
    
    link = "https://issuetracker.google.com/issues/155218379"
    )
    
    class CompileLibraryResourcesWorkaround implements Workaround
    {
    
    // the workaroun
    d
    
    }
    

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45. @AndroidIssue
    (
    
    introducedIn = "4.0.0"
    ,
    
    fixedIn = ['7.0.0-alpha09']
    ,
    
    link = "https://issuetracker.google.com/issues/155218379"
    )
    
    class CompileLibraryResourcesWorkaround implements Workaround
    {
    
    // the workaroun
    d
    
    }
    

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46. @AndroidIssue
    (
    
    introducedIn = "4.0.0"
    ,
    
    fixedIn = ['7.0.0-alpha09']
    ,
    
    link = "https://issuetracker.google.com/issues/155218379"
    )
    
    class CompileLibraryResourcesWorkaround implements Workaround
    {
    
    // the workaround
    }
    

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47. Three-card Monte
    https://www.youtube.com/watch?v=QJv44-Ghj_Y
    aka Find the Lady, das Kümmelblättchen, Jeu du Bonneteau, Gioco
    delle tre carte, Bul Karayı Al Parayı
    

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48. Con artists enticing people on Potsdamer Platz, Berlin, to play, and lose money in the game in 2018.
    https://en.wikipedia.org/wiki/Three-card_Monte
    

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50. View Slide

51. Gradle Monte
    🎩
    

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52. Gradle Monte
    🎩
    don't try this at home
    

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53. 1.Add new workaround property with RELATIVE path sensitivity to existing task
    
    
    2.Set workaround property with value of original property
    
    
    3.Set original property to dummy (empty) value
    
    
    4.Gradle performs input snapshotting on RELATIVE workaround property and
    dummy original property
    
    
    5.After input snapshotting, set original property back its original value
    
    
    6.Task executes on original value of original property
    Gradle Monte
    🎩
    

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54. tasks.withType(CompileLibraryResourcesTask).configureEach { Task task -
    >
    
    }
    

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55. tasks.withType(CompileLibraryResourcesTask).configureEach { Task task -
    >
    
    DirectoryProperty originalPropertyValue = objects.directoryProperty(
    )
    
    }
    

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56. tasks.withType(CompileLibraryResourcesTask).configureEach { Task task -
    >
    
    DirectoryProperty originalPropertyValue = objects.directoryProperty()
    // Add a workaround input with the original property value and RELATIVE path sensitivit
    y
    
    task.inputs.dir(originalPropertyValue
    )
    
    .withPathSensitivity(PathSensitivity.RELATIVE
    )
    
    .withPropertyName("${propertyName}.workaround"
    )
    
    .optional(
    )
    
    }
    

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57. tasks.withType(CompileLibraryResourcesTask).configureEach { Task task -
    >
    
    DirectoryProperty originalPropertyValue = objects.directoryProperty(
    )
    
    // Add a workaround input with the original property value and RELATIVE path sensitivit
    y
    
    task.inputs.dir(originalPropertyValue
    )
    
    .withPathSensitivity(PathSensitivity.RELATIVE
    )
    
    .withPropertyName("${propertyName}.workaround"
    )
    
    .optional(
    )
    
    gradle.taskGraph.beforeTask
    {
    
    if (it == task)
    {
    
    originalPropertyValue.set(task.getProperty(propertyName)
    )
    
    }
    }
    }
    

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58. tasks.withType(CompileLibraryResourcesTask).configureEach { Task task -
    >
    
    DirectoryProperty originalPropertyValue = objects.directoryProperty(
    )
    
    // Add a workaround input with the original property value and RELATIVE path sensitivit
    y
    
    task.inputs.dir(originalPropertyValue
    )
    
    .withPathSensitivity(PathSensitivity.RELATIVE
    )
    
    .withPropertyName("${propertyName}.workaround"
    )
    
    .optional(
    )
    
    gradle.taskGraph.beforeTask
    {
    
    if (it == task)
    {
    
    originalPropertyValue.set(task.getProperty(propertyName)
    )
    
    def dummyProperty = objects.directoryProperty(
    )
    
    // Dummy file to give the DirectoryProperty a value
    .
    
    dummyProperty.set(project.file('/doesnt-exist')
    )
    
    setPropertyValue(task, dummyProperty
    )
    
    }
    }
    }
    

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59. tasks.withType(CompileLibraryResourcesTask).configureEach { Task task -
    >
    
    DirectoryProperty originalPropertyValue = objects.directoryProperty(
    )
    
    // Add a workaround input with the original property value and RELATIVE path sensitivit
    y
    
    task.inputs.dir(originalPropertyValue
    )
    
    .withPathSensitivity(PathSensitivity.RELATIVE
    )
    
    .withPropertyName("${propertyName}.workaround"
    )
    
    .optional(
    )
    
    gradle.taskGraph.beforeTask
    {
    
    if (it == task)
    {
    
    originalPropertyValue.set(task.getProperty(propertyName)
    )
    
    def dummyProperty = objects.directoryProperty(
    )
    
    // Non-existent file to give the DirectoryProperty a value
    .
    
    dummyProperty.set(project.file('/doesnt-exist')
    )
    
    setPropertyValue(task, dummyProperty
    )
    
    }
    }
    // Set the original task property back to its original valu
    e
    
    task.doFirst
    {
    
    setPropertyValue(task, originalPropertyValue
    )
    
    }
    }
    

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60. tasks.withType(CompileLibraryResourcesTask).configureEach { Task task -
    >
    
    DirectoryProperty originalPropertyValue = objects.directoryProperty(
    )
    
    // Add a workaround input with the original property value and RELATIVE path sensitivit
    y
    
    task.inputs.dir(originalPropertyValue
    )
    
    .withPathSensitivity(PathSensitivity.RELATIVE
    )
    
    .withPropertyName("${propertyName}.workaround"
    )
    
    .optional(
    )
    
    gradle.taskGraph.beforeTask
    {
    
    if (it == task)
    {
    
    originalPropertyValue.set(task.getProperty(propertyName)
    )
    
    def dummyProperty = objects.directoryProperty(
    )
    
    // Non-existent file to give the DirectoryProperty a value
    .
    
    dummyProperty.set(project.file('/doesnt-exist')
    )
    
    setPropertyValue(task, dummyProperty
    )
    
    }
    }
    // Set the original task property back to its original valu
    e
    
    task.doFirst
    {
    
    setPropertyValue(task, originalPropertyValue
    )
    
    }
    }
    

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61. tasks.withType(CompileLibraryResourcesTask).configureEach { Task task -
    >
    
    DirectoryProperty originalPropertyValue = objects.directoryProperty(
    )
    
    // Add a workaround input with the original property value and RELATIVE path sensitivit
    y
    
    task.inputs.dir(originalPropertyValue
    )
    
    .withPathSensitivity(PathSensitivity.RELATIVE
    )
    
    .withPropertyName("${propertyName}.workaround"
    )
    
    .optional(
    )
    
    gradle.taskGraph.beforeTask
    {
    
    if (it == task)
    {
    
    originalPropertyValue.set(task.getProperty(propertyName)
    )
    
    def dummyProperty = objects.directoryProperty(
    )
    
    // Non-existent file to give the DirectoryProperty a value
    .
    
    dummyProperty.set(project.file('/doesnt-exist')
    )
    
    setPropertyValue(task, dummyProperty
    )
    
    }
    }
    // Set the original task property back to its original valu
    e
    
    task.doFirst
    {
    
    setPropertyValue(task, originalPropertyValue
    )
    
    }
    }
    

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62. Please don't ever write that code
    

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63. CompileLibraryResourcesTask is
    fixed in AGP 7
    

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64. CompileLibraryResourcesTask is
    fixed in AGP 7*
    

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65. * must enable
    android.experimental.enableSourceSetPathsMap
    
    
    and
    android.experimental.cacheCompileLibResources
    
    
    

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66. Room cache miss
    

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67. Room is an annotation processor
    

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68. implementation("androidx.room:room-runtime:2.3.0"
    )
    
    kapt("androidx.room:room-compiler:2.3.0")
    

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69. How many use Room?
    

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70. View Slide

71. View Slide

72. android
    {
    
    defaultConfig
    {
    
    javaCompileOptions
    {
    
    annotationProcessorOptions
    {
    
    arguments += mapOf
    (
    
    "room.schemaLocation" to "$projectDir/schemas",
    )
    
    }
    
    }
    
    }
    
    }
    

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73. annotationProcessorOptions
    {
    
    arguments += mapOf
    (
    
    "room.schemaLocation" to "$projectDir/schemas",
    )
    
    }
    

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74. annotationProcessorOptions
    {
    
    arguments += mapOf
    (
    
    "room.schemaLocation" to "$projectDir/schemas",
    )
    
    }
    

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75. "$projectDir/schemas"
    

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76. View Slide

77. "$projectDir/schemas"
    

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78. "User/no/home/workspace/myapp/schemas"
    

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79. "User/no/home/workspace/myapp/schemas
    "
    
    "User/bob/home/workspace/myapp/schemas"
    

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80. "User/no/home/workspace/myapp/schemas
    "
    
    "User/bob/home/workspace/myapp/schemas
    "
    
    "User/jenkins/home/myapp/schemas"
    

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81. "$projectDir/schemas"
    

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82. View Slide

83. CommandLineArgumentProvider
    

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84. class RoomSchemaLocationArgumentProvider implements CommandLineArgumentProvider
    {
    
    }
    

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85. class RoomSchemaLocationArgumentProvider implements CommandLineArgumentProvider
    {
    
    @Overrid
    e
    
    Iterable asArguments()
    {
    
    return [] // TODO
    }
    }
    

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86. class RoomSchemaLocationArgumentProvider implements CommandLineArgumentProvider {
    RoomSchemaLocationArgumentProvider(Directory schemaLocationDir)
    {
    
    }
    
    @Overrid
    e
    
    Iterable asArguments()
    {
    
    return [] // TOD
    O
    
    }
    }
    

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87. class RoomSchemaLocationArgumentProvider implements CommandLineArgumentProvider
    {
    
    final Directory schemaLocationDi
    r
    
    RoomSchemaLocationArgumentProvider(Directory schemaLocationDir)
    {
    
    this.schemaLocationDir = schemaLocationDi
    r
    
    }
    
    @Overrid
    e
    
    Iterable asArguments()
    {
    
    return [] // TOD
    O
    
    }
    }
    

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88. class RoomSchemaLocationArgumentProvider implements CommandLineArgumentProvider
    {
    
    final Directory schemaLocationDi
    r
    
    RoomSchemaLocationArgumentProvider(Directory schemaLocationDir)
    {
    
    this.schemaLocationDir = schemaLocationDi
    r
    
    }
    
    @Overrid
    e
    
    Iterable asArguments()
    {
    
    return ["room.schemaLocation"]
    }
    }
    

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89. class RoomSchemaLocationArgumentProvider implements CommandLineArgumentProvider
    {
    
    final Directory schemaLocationDi
    r
    
    RoomSchemaLocationArgumentProvider(Directory schemaLocationDir)
    {
    
    this.schemaLocationDir = schemaLocationDi
    r
    
    }
    @Overrid
    e
    
    Iterable asArguments()
    {
    
    return ["-Aroom.schemaLocation=schemaLocationDir.get().asFile.absolutePath"]
    }
    }
    

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90. class RoomSchemaLocationArgumentProvider implements CommandLineArgumentProvider
    {
    
    @get:PathSensitive(PathSensitivity.RELATIVE)
    final Directory schemaLocationDi
    r
    
    RoomSchemaLocationArgumentProvider(Directory schemaLocationDir)
    {
    
    this.schemaLocationDir = schemaLocationDi
    r
    
    }
    
    @Overrid
    e
    
    Iterable asArguments()
    {
    
    return ["-Aroom.schemaLocation=schemaLocationDir.get().asFile.absolutePath"
    ]
    
    }
    b
    
    }a
    

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91. class RoomSchemaLocationArgumentProvider implements CommandLineArgumentProvider
    {
    
    @OutputDirector
    y
    
    @get:PathSensitive(PathSensitivity.RELATIVE)
    final Directory schemaLocationDi
    r
    
    RoomSchemaLocationArgumentProvider(Directory schemaLocationDir)
    {
    
    this.schemaLocationDir = schemaLocationDi
    r
    
    }
    
    @Overrid
    e
    
    Iterable asArguments()
    {
    
    return ["-Aroom.schemaLocation=schemaLocationDir.get().asFile.absolutePath"
    ]
    
    }
    b
    
    }a
    

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92. class RoomSchemaLocationArgumentProvider implements CommandLineArgumentProvider
    {
    
    @OutputDirector
    y
    
    @get:PathSensitive(PathSensitivity.RELATIVE)
    final Directory schemaLocationDi
    r
    
    RoomSchemaLocationArgumentProvider(Directory schemaLocationDir)
    {
    
    this.schemaLocationDir = schemaLocationDi
    r
    
    }
    
    @Overrid
    e
    
    Iterable asArguments()
    {
    
    return ["-Aroom.schemaLocation=schemaLocationDir.get().asFile.absolutePath"]
    }
    }
    

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93. How to use it?
    

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94. annotationProcessorOptions
    {
    
    arguments += mapOf
    (
    
    "room.schemaLocation" to "$projectDir/schemas",
    )
    
    }
    

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95. annotationProcessorOptions
    {
    
    compilerArgumentProviders.add(RoomSchemaLocationArgumentProvider("$projectDir/schemas")
    )
    
    }
    

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96. And now you get cache hits
    

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97. And now you get cache hits?
    

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98. yes, but
    

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99. View Slide

100. View Slide

101. schemas/1.json // exists and is committed to version contro
     l
     
     schemas/2.json // written when schema is updated
     

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102. schemas/1.json // inpu
     t
     
     schemas/2.json // output
     

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103. schemas // input and output
     

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104. class RoomSchemaLocationArgumentProvider implements CommandLineArgumentProvider
     {
     
     @OutputDirector
     y
     
     @get:PathSensitive(PathSensitivity.RELATIVE)
     final Directory schemaLocationDi
     r
     
     RoomSchemaLocationArgumentProvider(Directory schemaLocationDir)
     {
     
     this.schemaLocationDir = schemaLocationDi
     r
     
     }
     
     @Overrid
     e
     
     Iterable asArguments()
     {
     
     return ["-Aroom.schemaLocation=schemaLocationDir.get().asFile.absolutePath"]
     }
     
     }
     

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105. class RoomSchemaLocationArgumentProvider implements CommandLineArgumentProvider
     {
     
     @InputDirectory
     
     
     @OutputDirector
     y
     
     @get:PathSensitive(PathSensitivity.RELATIVE)
     final Directory schemaLocationDi
     r
     
     RoomSchemaLocationArgumentProvider(Directory schemaLocationDir)
     {
     
     this.schemaLocationDir = schemaLocationDi
     r
     
     }
     
     @Overrid
     e
     
     Iterable asArguments()
     {
     
     return ["-Aroom.schemaLocation=schemaLocationDir.get().asFile.absolutePath"]
     }
     
     }
     

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106. - In plugin 'kotlin-android' type 'org.jetbrains.kotlin.gradle.internal.KaptWithoutKotlincTask'
     property 'annotationProcessorOptionProviders$kotlin_gradle_plugin.$0.$0.schemaLocationDir' has
     conflicting type annotations declared: @OutputDirectory, @InputDirectory
     .
     
     Reason: The different annotations have different semantics and Gradle cannot determine which
     one to pick
     .
     
     Possible solution: Choose between one of the conflicting annotations.
     - In plugin 'kotlin-android' type 'org.jetbrains.kotlin.gradle.internal.KaptWithoutKotlincTask'
     property 'annotationProcessorOptionProviders$kotlin_gradle_plugin.$0.$0.schemaLocationDir' is
     annotated with @PathSensitive but that is not allowed for 'OutputDirectory' properties
     .
     
     Reason: This modifier is used in conjunction with a property of type 'OutputDirectory' but
     this doesn't have semantics
     .
     
     Possible solution: Remove the '@PathSensitive' annotation
     .
     
     Please refer to https://docs.gradle.org/7.2/userguide/
     validation_problems.html#incompatible_annotations for more details about this problem.
     

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107. Input and output cannot be
     overlapping
     

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108. ?
     

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109. View Slide

110. View Slide

111. Task specific output directory
     

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112. android
     {
     
     defaultConfig
     {
     
     javaCompileOptions
     {
     
     annotationProcessorOptions
     {
     
     arguments += mapOf
     (
     
     "room.schemaLocation" to "$projectDir/schemas",
     )
     
     }
     
     }
     
     }
     
     }
     kaptDebug and kaptRelease write to the same folder
     

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113. View Slide

114. View Slide

115. •Absolute path sensitivity
     
     
     •Overlapping inputs and outputs
     
     
     •Non exclusive output directory
     
     
     •Kapt removes contents of output
     directories
     

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116. View Slide

117. • Annotation Processors are not tools to write arbitrary
     fi
     les on the
     fi
     lesystem.
     
     
     • This is what Gradle tasks and Gradle plugins are for.
     

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118. This needs to be a Gradle plugin
     

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119. This really needs to be a Gradle plugin
     

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120. Until then, the Android Cache Fix plugin will
     exist forever. 😭
     

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121. • Absolute path sensitivity
     
     
     • Overlapping inputs and outputs
     
     
     • Non exclusive output directory
     
     
     • Kapt removes contents of output directories
     RoomSchemaLocationWorkaround
     fi
     xes all of these.
     
     
     Use the Android Cache Fix plugin.
     Shout out to Gary!
     

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122. https://issuetracker.google.com/issues/132245929
     https://issuetracker.google.com/issues/139438151
     What is Google doing about this?
     

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123. Room now has KSP support
     because performance matters.
     This doesn't solve the cache miss
     🥲
     

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124. What looks better in a promotion case?
     • Use new technology to rewrite Room to
     improve build speeds
     
     
     • Fix a 41 star bug filed by community with a
     Gradle plugin
     

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125. https://issuetracker.google.com/issues/132245929
     https://issuetracker.google.com/issues/139438151
     What is Google doing about this?
     please star ⭐
     #fixroom
     

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126. View Slide

127. What else does the Android Cache
     Fix plugin do?
     

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128. View Slide

129. View Slide

130. What is caching?
     

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131. JavaCompile task
     Source Files
     Compiler Args
     Dependencies
     Class files
     

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132. Copy task
     Source Files Source Files
     

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133. Project Directory
     Up-to-date checking
     is the file already there?
     

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134. Gradle build cache
     is there a zip entry with the
     
     
     same build cache key?
     ~/.gradle/caches
     Gradle Home
     

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135. Copy task
     Source Files Source Files
     

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136. Cache key
     Source Files
     Build cache Source Files
     Cache Retrieval
     

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137. Project Directory
     zip
     unzip
     ~/.gradle/caches
     Build Cache
     Copy task
     Source Files Source Files
     Re-execution
     Cache store and fetch
     Happens along every execution
     

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138. Sync, Copy, Zip and Jar should not
     be cached
     https://docs.gradle.org/current/userguide/build_cache_concepts.html#non_cacheable_tasks
     

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139. View Slide

140. BundleLibraryClassesJar is a Jar task
     

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141. Disabling caching
     

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142. outputs.doNotCacheIf {btrueb}b
     

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143. tasks.withType(BundleLibraryClassesJar).configureEacha{a
     outputs.doNotCacheIf ("I/O bound tasks do not benefit from caching") {btrueb}b
     }
     

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144. View Slide

145. Thanks to the Android Gradle
     plugin team at Google
     

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146. https://github.com/gradle/android-cache-fix-gradle-plugin
     Android Cache Fix plugin
     plugins {
     
     
     id "org.gradle.android.cache-fix" version "2.4.4" apply false
     
     
     }
     
     
     subprojects {
     
     
     plugins.withType(com.android.build.gradle.api.AndroidBasePlugin) {
     
     
     project.apply plugin: "org.gradle.android.cache-fix"
     
     
     }
     
     
     }
     
     
     

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147. Gradle Enterprise Android Features
     • Find your slowest tests in the test dashboard
     
     
     • Learn which tests are flaky with flaky test insights
     
     
     • Android Instrumentation Test results in Build Scans!
     Check it out! https://gradle.com/enterprise-customers/oss-projects/
     

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148. https://ge.gradle.org/scans/tests?search.relativeStartTime=P7D&search.timeZoneId=Europe/Berlin&tests.sortField=MEAN_DURATION&tests.unstableOnly=true
     https://bit.ly/3DUBTu0
     

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149. View Slide

150. Tweet, Like, Subscribe, Upvote, Star
     https://github.com/gradle/android-cache-fix-gradle-plugin
     https://issuetracker.google.com/issues/132245929
     
     
     https://issuetracker.google.com/issues/139438151
     please star ⭐
     #fixroom
     

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151. More Resources
     Gradle Training
     https://gradle.com/training/
     
     
     https://gradle.com/training/introduction-to-gradle
     
     
     https://gradle.com/training/build-cache-deep-dive
     Gradle Community Slack
     https://gradle.com/slack-invite
     

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152. Thank you!
     Gradle Enterprise Trial
     osacky.com
     https://gradle.com/enterprise/trial/
     https://go.gradle.com/solutions-engineer
     Gradle Solutions is hiring
     #fixroom @nellyspageli
     Find us at our booth here at Droidcon
     

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