CircleCI没有选择运行步骤中定义的环境变量？

Question

我试图为Django项目运行CircleCI测试，其中manage.py决定要从环境变量ENV_ROLE应用的settings.py版本（development.py，staging.py，或{}）。以前，ENV_ROLE如果没有定义的话，ENV_ROLE被设置为默认值development，但是我正在更改它，以便Django在没有定义的情况下抛出一个ImproperlyConfigured错误。在

为了使测试通过，我需要在CircleCI测试环境中定义ENV_ROLE环境变量。在https://circleci.com/docs/2.0/env-vars/#setting-an-environment-variable-in-a-step之后，我在run步骤中添加了以下内容：

      - run:
          environment:
            ENV_ROLE: development

但是，我仍然从CircleCI得到这个错误：

^{pr2}$

以下是完整的.circleci/config.yml：

version: 2
jobs:
  build:
    working_directory: ~/lucy/lucy_web/
    docker:
      - image: python:3.6.5
        environment:
          DATABASE_URL: ...
      - image: jannkleen/docker-postgres-gis-hstore
        environment:
          POSTGRES_USER: ...
          POSTGRES_DB: ...
      - image: redis:4.0.9-alpine
    steps:
      - checkout
      - restore_cache:
          key: deps1-{{ .Branch }}-{{ checksum "lucy-web/requirements.txt" }}
      - run:
          name: Install Python deps in a venv
          command: |
            cd lucy-web
            python3 -m venv venv
            . venv/bin/activate
            pip3 install -r requirements.txt
      - save_cache:
          key: deps1-{{ .Branch }}-{{ checksum "lucy-web/requirements.txt" }}
          paths:
            - "venv"
      - run:
          environment:
            ENV_ROLE: development
          command: |
            cd lucy-web
            source venv/bin/activate
            python manage.py compilescss --verbosity 0
            python manage.py collectstatic --clear --no-input --verbosity 0
            flake8
            python manage.py test
      - store_artifacts:
          path: test-reports/
          destination: tr1
      - store_test_results:
          path: test-reports/
  app_test:
    working_directory: ~/lucy/lucy_app
    docker:
      - image: node:8
    steps:
      - checkout
      - run:
          command: |
            cd lucy-app
            yarn install
            yarn lint
            yarn jest
workflows:
  version: 2
  build_and_test:
    jobs:
      - build
      - app_test

Django项目修改了manage.py：

#!/usr/bin/env python
import os
import sys
from dotenv import load_dotenv, find_dotenv

if __name__ == "__main__":
    # Set environment variables from .env file
    load_dotenv(find_dotenv())

    # Determine which settings to apply (development, staging, or production)
    from env import ENV_ROLE
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", f"lucy.settings.{ENV_ROLE}")
    try:
        from django.core.management import execute_from_command_line
    except ImportError:
        # The above import may fail for some other reason. Ensure that the
        # issue is really that Django is missing to avoid masking other
        # exceptions on Python 2.
        try:
            import django  # noqa: F401
        except ImportError:
            raise ImportError(
                "Couldn't import Django. Are you sure it's installed and "
                "available on your PYTHONPATH environment variable? Did you "
                "forget to activate a virtual environment?"
            )
        raise
    execute_from_command_line(sys.argv)

其中env.py检查是否定义了ENV_ROLE环境变量，否则抛出ImproperlyConfigured错误：

import os
from django.core.exceptions import ImproperlyConfigured

try:
    ENV_ROLE = os.environ['ENV_ROLE']
except KeyError:
    raise ImproperlyConfigured(
        "No 'ENV_ROLE' environment variable is defined. "
        "Please define it as 'development', 'staging', or 'production'.")

我不明白为什么CircleCI没有“拾取”环境变量ENV_ROLE？我的语法或对文档的理解有问题吗？在

Answer 1

我在使用circleCI+GAE时也遇到了类似的问题；我以为我在设置变量/配置yml因为GAE运行的构建过程没有将它们传送到应用程序中，所以从来没有真正进入应用程序。相反，我需要：

• 使多个应用程序yaml文件（在我的案例应用程序中-登台.yaml和应用程序-山药)在

• 更新.circleci/配置yml在每个命令语句中使用这些命令，例如：

  命令：gcloud app deploy app-登台.yaml

Answer 2

尝试在docker:部分指定变量。在

docker:
    environment:
        ENV_ROLE: development

这将使您的容器与环境变量一起旋转。在容器可以访问我的变量之前，我必须测试在哪里插入我的几个构建的变量。在

如果您在需要ENV_角色时可以看到这些变量中的任何一个，那么您可能还需要添加there。在

^{pr2}$