Default git http username and password to empty strings

Not having a default for Gerrit http username and password causes
Jenkins to fail due to:

```
IllegalArgumentException: Null value not allowed as an environment
variable
```

Default gerrit http username and password to empty strings and check for
empty values to decide whether to use vault defaults.

Bug: Issue 14194
Change-Id: Ic719dfcde11e00f1bb272b2ff7954dc47fc03e27
1 file changed
tree: 245ba1b5b3731cfb3214857d6ad85bd3b825c398
  1. jenkins-docker/
  2. jenkins/
  3. vars/
  4. worker/
  5. .gitignore
  6. Jenkinsfile
  7. README.md
  8. yamllint-config.yaml
README.md

Gerrit CI scripts

Providing jobs

This project uses Jenkins Jobs Builder [1] to generate jobs from yaml descriptor files.

To add new jobs reuse existing templates, defaults etc. as much as possible. E.g. adding a job to build an additional branch of a project may be as easy as adding the name of the branch to an existing project.

To ensure well readable yaml-files, use yamllint [2] to lint the yaml-files. Yamllint can be downloaded using Python Pip:

pip3 install yamllint

To run the linter, execute this command from the project's root directory:

yamllint -c yamllint-config.yaml jenkins/**/*.yaml

Yamllint will not fix detected issues itself.

[1] https://docs.openstack.org/infra/jenkins-job-builder/index.html [2] https://pypi.org/project/yamllint/