wercker中的链式管道(默认执行)不产生结果

我在威克有以下管道。它们在复制发行目的上完全相同。

setup:
  steps:
    - script:
      name: set yarn cache
      code: yarn config set cache-folder $WERCKER_CACHE_DIR/yarn
    - script:
      name: install dependencies
      code: yarn
    - script:
      name: ls
      code: ls
    - script:
      name: test-unit
      code: yarn test

test-unit:
  steps:
    - script:
      name: set yarn cache
      code: yarn config set cache-folder $WERCKER_CACHE_DIR/yarn
    - script:
      name: install dependencies
      code: yarn
    - script:
      name: ls
      code: ls
    - script:
      name: test-unit
      code: yarn test

一个配置为在推送时执行,第二个配置为在第一个之后执行。

问题是管道不会产生相同的结果。在第二个管道中,我的命令(如纱线测试)在几秒钟内产生空结果。首先(在推送时执行)测试运行良好。

以下是第一个管道的输出:

export WERCKER_STEP_ROOT="/pipeline/script-3bab60c8-5cfd-4b86-9aa3-733e93e12d12"
export WERCKER_STEP_ID="script-3bab60c8-5cfd-4b86-9aa3-733e93e12d12"
export WERCKER_STEP_OWNER="wercker"
export WERCKER_STEP_NAME="script"
export WERCKER_REPORT_NUMBERS_FILE="/report/script-3bab60c8-5cfd-4b86-9aa3-733e93e12d12/numbers.ini"
export WERCKER_REPORT_MESSAGE_FILE="/report/script-3bab60c8-5cfd-4b86-9aa3-733e93e12d12/message.txt"
export WERCKER_REPORT_ARTIFACTS_DIR="/report/script-3bab60c8-5cfd-4b86-9aa3-733e93e12d12/artifacts"
source "/pipeline/script-3bab60c8-5cfd-4b86-9aa3-733e93e12d12/run.sh" < /dev/null
yarn run v1.7.0
$ jest --verbose
PASS src/components/auth/__tests__/passwordValidation.spec.js
  Password Validation Component
    ✓ renders a vue instance (27ms)
    ✓ show all errors for invalid password (16ms)
    ✓ show no errors for valid password (6ms)

PASS src/components/__tests__/payment.spec.js
  Payment Form Component
    ✓ renders a vue instance (44ms)
   ..... 

Test Suites: 7 passed, 7 total
Tests:       24 passed, 24 total
Snapshots:   0 total
Time:        3.261s
Ran all test suites.
Done in 4.49s.

下面是第二条管道的输出,有问题:

export WERCKER_STEP_ROOT="/pipeline/script-22826921-2896-40cc-a7f2-d99d0c5377b9"
export WERCKER_STEP_ID="script-22826921-2896-40cc-a7f2-d99d0c5377b9"
export WERCKER_STEP_OWNER="wercker"
export WERCKER_STEP_NAME="script"
export WERCKER_REPORT_NUMBERS_FILE="/report/script-22826921-2896-40cc-a7f2-d99d0c5377b9/numbers.ini"
export WERCKER_REPORT_MESSAGE_FILE="/report/script-22826921-2896-40cc-a7f2-d99d0c5377b9/message.txt"
export WERCKER_REPORT_ARTIFACTS_DIR="/report/script-22826921-2896-40cc-a7f2-d99d0c5377b9/artifacts"
source "/pipeline/script-22826921-2896-40cc-a7f2-d99d0c5377b9/run.sh" < /dev/null
yarn run v1.7.0
$ jest --verbose
Done in 0.08s.

所以这是一个问题,我的链接管道中的命令不会产生任何结果。ls命令在第一个和第二个管道中返回相同的内容。而且问题不仅仅是为了jest,其他东西,比如build,lint等,在第二个管道中产生相同的零结果。

发生了什么以及如何修复它以使命令在链式管道中工作?