How to cache all android working directory to speed up builds?

Build Environment Caching Dependencies
1

Hello!

I am new to CI. I am trying to build an ordinary android application from github.
My idea to build applications like if they are in my local folder. I mean i want to cache entire project (including not only dependencies, but done Gradle tasks too)

If i run project it with Cirlce CI i get:

Task :app:preBuild
Task :app:preDebugBuild
Task :app:compileDebugAidl
Task :app:compileDebugRenderscript
Task :app:generateDebugBuildConfig
Task :app:checkDebugAarMetadata
Task :app:generateDebugResValues
Task :app:generateDebugResources
Task :app:createDebugCompatibleScreenManifests
Task :app:extractDeepLinksDebug
Task :app:processDebugMainManifest
Task :app:mergeDebugResources
Task :app:processDebugManifest
Task :app:javaPreCompileDebug
…etc

it takes about 1 min.
it works cool. thank you. i know that CI runs builds clear, so all tasks are in this list. But if i run build again, I expect CI to cache all previous steps to recieve like this :

Task :app:preBuild UP-TO-DATE
Task :app:preDebugBuild UP-TO-DATE
Task :app:compileDebugAidl UP-TO-DATE
Task :app:compileDebugRenderscript UP-TO-DATE
Task :app:generateDebugBuildConfig UP-TO-DATE
Task :app:checkDebugAarMetadata UP-TO-DATE
Task :app:generateDebugResValues UP-TO-DATE
Task :app:generateDebugResources UP-TO-DATE
Task :app:createDebugCompatibleScreenManifests UP-TO-DATE
Task :app:extractDeepLinksDebug UP-TO-DATE
Task :app:processDebugMainManifest UP-TO-DATE
Task :app:mergeDebugResources UP-TO-DATE
Task :app:processDebugManifest UP-TO-DATE
Task :app:javaPreCompileDebug UP-TO-DATE
…etc

I expect to recive builds that take few seconds.

here is my config

version: 2.1

orbs:

android: circleci/android@0.2.1

jobs:

build:

executor: android/android

working_directory: ~/code

environment:

  JVM_OPTS: -Xmx3200m

  GRADLE_OPTS: '-Dorg.gradle.jvmargs="-Xmx1024m" -Dkotlin.compiler.execution.strategy=in-process'

steps:

  - checkout

  - restore_cache:

      key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}

      

  - run:

       command: chmod +x ./gradlew  

  - restore_cache:

      key: myBuildFolder

  - run:

      name: Download Dependencies

      command: ./gradlew  androidDependencies --build-cache -PpreDexEnable=false --no-daemon --max-workers=2

  - save_cache:

      paths:

        - ~/.gradle

      key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}

  

  - run:              

       command: ./gradlew :app:assembleDebug --build-cache -PpreDexEnable=false --no-daemon --max-workers=2

  

  - save_cache:

      key: myBuildFolder

      paths:

        - /home/circleci/code/app/build

  - run:              

       command: |

                mkdir -p ~/artifacts 

                cp app/build/outputs/apk/debug/app-debug.apk ~/artifacts

    

  - store_artifacts:

      path: ~/artifacts

Here I try to save app/build folder for future gradle runs with save_cache: key: myBuildFolder but it doesn’t seem to work at all: every build constantly runs all steps from the very begining.
So, could you please to help me to fix my config to get cached builds?

Thanks!!!

2

@AlexandarKott It looks like the key “myBuildFolder” is always used. Since caches are immutable, the cache will never get overwritten. Perhaps you could try bumping the cache key as a quick test to see if that is the cause of the issue