在AWS CodeBuild中缓存Gradle Wrapper的配置问题

I have the following buildspec configuration for AWS CodeBuild:

phases:
  build:
    commands:
      - ./gradlew soakTest -s
cache:
  paths:
    - '/root/.gradle/caches/**/*'
    - '.gradle/**/*'

When running this in CodeBuild, I can see logs showing Gradle 4.7 is being downloaded every time. However, other Jar dependencies seem to be cached correctly without repeated download logs. How should I adjust the buildspec's cache rules to ensure the Gradle version corresponding to the Gradle Wrapper is properly cached?

Solution #

The problem here is that your current cache configuration misses the directory where the Gradle Wrapper stores the actual Gradle distribution it downloads. By default, the wrapper saves these pre-built Gradle binaries in /root/.gradle/wrapper/dists/—a directory you haven’t included in your cache paths yet.

To fix this, simply add this path to your cache.paths list. Here's the updated buildspec:

phases:
  build:
    commands:
      - ./gradlew soakTest -s
cache:
  paths:
    - '/root/.gradle/caches/**/*'
    - '/root/.gradle/wrapper/dists/**/*'
    - '.gradle/**/*'

Important Details: #

• The /root/.gradle/wrapper/dists/ directory organizes downloaded Gradle versions by their version number and a unique hash, so different Gradle versions will be cached separately without conflicts.
• Double-check that your CodeBuild project has caching enabled (either local cache for faster reuse in subsequent builds on the same environment, or S3 cache for persistence across different build environments). You can confirm this in your project settings under the "Cache" tab.
• If your build uses a non-root user (uncommon in default CodeBuild images), adjust the path to match the user's home directory (e.g., /home/ec2-user/.gradle/wrapper/dists/**/*).

内容的提问来源于stack exchange，提问作者Shorn