CircleCI

    In this section we are going to present some configuration examples to see how CircleCI implements some continuous integration concepts.

    Before showing some examples, it’s worth mentioning . As defined in the official docs:

    In our case, we are going to use Crystal’s Orb

    ```yaml title=”.circleci/config.yml” workflows: version: 2 build: jobs:

    orbs: crystal: manastech/crystal@1.0 version: 2.1

    2. Yeah! That was simple! With Orbs an abstraction layer is built so that the configuration file is more readable and intuitive.
    4. In case we are wondering what the job [crystal/test](https://circleci.com/orbs/registry/orb/manastech/crystal#jobs-test) does, we always may see the source code.
    6. ### Using `nightly`
    8. Using nightly Crystal release is as easy as:
    10. ```yaml title=".circleci/config.yml"
    11. workflows:
    12.   version: 2
    13.   build:
    14.     jobs:
    15.           name: test-on-nightly
    16.           executor:
    17.             name: crystal/default
    18.             tag: nightly
    20. orbs:
    21.   crystal: manastech/crystal@1.0
    22. version: 2.1

    Using a specific Crystal release

    ```yaml title=”.circleci/config.yml” workflows: version: 2 build: jobs:

    orbs: crystal: manastech/crystal@1.0 version: 2.1

    2. ## Installing shards packages
    4. You need not worry about it since the `crystal/test` job runs the `crystal/shard-install` orb command.
    6. ## Installing binary dependencies
    8. Our application or maybe some shards may require libraries and packages. This binary dependencies may be installed using the [Apt](https://help.ubuntu.com/lts/serverguide/apt.html) command.
    10. Here is an example installing the `libsqlite3` development package:
    12. ```yaml title=".circleci/config.yml"
    13.   version: 2
    14.   build:
    15.     jobs:
    16.       - crystal/test:
    18.             - run: apt-get update && apt-get install -y libsqlite3-dev
    20. orbs:
    21.   crystal: manastech/crystal@1.0
    22. version: 2.1

    ```yaml title=”.circleci/config.yml” executors: crystal_mysql: docker:

    workflows: version: 2 build: jobs:

    1.   - crystal/test:
    2.       executor: crystal_mysql
    3.       pre-steps:
    4.         - run:
    5.             name: Waiting for service to start (check dockerize)
    6.             command: sleep 1m
    7.         - checkout
    8.         - run:
    9.             name: Install MySQL CLI; Import dummy data
    10.             command: |
    11.                     mysql -h 127.0.0.1 -u root --password="" db < test-data/setup.sql

    orbs: crystal: manastech/crystal@1.0 version: 2.1 ```

    note The explicit checkout in the pre-steps is to have the test-data/setup.sql file available.