* Set up Circleci workflow
* Update python tag
* Add pre-test job to cache the requirements
* Upgrade pip itself
* Use 3.7 for lint
* Parallelize pylint
* Tweak run gen_requirements_all
* tweak cache key
## Description:
Fix a lint issue in credstash script.
**Related issue (if applicable):** fixes #<home-assistant issue number goes here>
**Pull request in [home-assistant.io](https://github.com/home-assistant/home-assistant.io) with documentation (if applicable):** home-assistant/home-assistant.io#<home-assistant.io PR number goes here>
## Example entry for `configuration.yaml` (if applicable):
```yaml
```
## Checklist:
- [ ] The code change is tested and works locally.
- [ ] Local tests pass with `tox`. **Your PR cannot be merged unless tests pass**
- [ ] There is no commented out code in this PR.
If user exposed functionality or configuration variables are added/changed:
- [ ] Documentation added/updated in [home-assistant.io](https://github.com/home-assistant/home-assistant.io)
If the code communicates with devices, web services, or third-party tools:
- [ ] New dependencies have been added to the `REQUIREMENTS` variable ([example][ex-requir]).
- [ ] New dependencies are only imported inside functions that use them ([example][ex-import]).
- [ ] New or updated dependencies have been added to `requirements_all.txt` by running `script/gen_requirements_all.py`.
- [ ] New files were added to `.coveragerc`.
If the code does not interact with devices:
- [ ] Tests have been added to verify that the new code works.
[ex-requir]: https://github.com/home-assistant/home-assistant/blob/dev/homeassistant/components/keyboard/__init__.py#L14
[ex-import]: https://github.com/home-assistant/home-assistant/blob/dev/homeassistant/components/keyboard/__init__.py#L23
## Description:
Fix a lint issue in credstash script.
**Related issue (if applicable):** fixes #<home-assistant issue number goes here>
**Pull request in [home-assistant.io](https://github.com/home-assistant/home-assistant.io) with documentation (if applicable):** home-assistant/home-assistant.io#<home-assistant.io PR number goes here>
## Example entry for `configuration.yaml` (if applicable):
```yaml
```
## Checklist:
- [ ] The code change is tested and works locally.
- [ ] Local tests pass with `tox`. **Your PR cannot be merged unless tests pass**
- [ ] There is no commented out code in this PR.
If user exposed functionality or configuration variables are added/changed:
- [ ] Documentation added/updated in [home-assistant.io](https://github.com/home-assistant/home-assistant.io)
If the code communicates with devices, web services, or third-party tools:
- [ ] New dependencies have been added to the `REQUIREMENTS` variable ([example][ex-requir]).
- [ ] New dependencies are only imported inside functions that use them ([example][ex-import]).
- [ ] New or updated dependencies have been added to `requirements_all.txt` by running `script/gen_requirements_all.py`.
- [ ] New files were added to `.coveragerc`.
If the code does not interact with devices:
- [ ] Tests have been added to verify that the new code works.
[ex-requir]: https://github.com/home-assistant/home-assistant/blob/dev/homeassistant/components/keyboard/__init__.py#L14
[ex-import]: https://github.com/home-assistant/home-assistant/blob/dev/homeassistant/components/keyboard/__init__.py#L23
* Add circleci support
* Add buildpack-deps
* Install libudev-dev
* sudo
* always run test
* Add test report
* no sugar
* quite pytest
* better junit test result
* Add $CODE_COVERAGE env var
