我在我的 bitbucket 管道中得到了這個(gè)：pipelines:  branches:    develop:    - step:        caches:          - composer        name: unit tests - Delivery         image: totersapp/laravel-docker:phpredis        script:        - echo "memory_limit=512M" > /usr/local/etc/php/conf.d/memory-limit-php.ini        - ln -f -s .env.pipelines .env        - composer install         services:        - postgres        - redis每次運(yùn)行它都會(huì)下載相同的文件（即使是第二次運(yùn)行）..任何想法為什么？這是作曲家安裝的日志：+ composer installLoading composer repositories with package informationInstalling dependencies (including require-dev) from lock filePackage operations: 199 installs, 0 updates, 0 removals  - Installing kylekatarnls/update-helper (1.2.0): Downloading (connecting...)Downloading (0%)           Downloading (100%)  - Installing ocramius/package-versions (1.4.2): Downloading (connecting...)Downloading (0%)           Downloading (30%)Downloading (35%)Downloading (65%)Downloading (95%)Downloading (100%)  - Installing symfony/polyfill-ctype (v1.13.1): Downloading (connecting...)Downloading (0%)           Downloading (100%)更新：無(wú)法覆蓋默認(rèn)值基于這個(gè)答案，我嘗試了這個(gè)：- step:    caches:      - composer    image: totersapp/laravel-docker:phpredis    script:    - composer install ..definitions:caches:  composer: /composer/cache我的問(wèn)題是我正在嘗試使用自定義緩存目錄（在本例中/composer/cache為在這個(gè)例子中，bitbucket 教程是用 bundle 做的： - bundle install --path vendor/bundle換句話說(shuō)，我不能運(yùn)行這樣的東西：- composer install --cache-directory /composer/cache