The code owners functionality relies on the validity of the following:
To reduce the risk that these files become invalid, they are validated when they are modified and invalid modifications are rejected. In addition code owner config files in a repository can be validated on demand by the Check code owners files REST endpoint.
NOTE: Most configuration issues are gracefully handled and do not break the code owners functionality (e.g. non-resolveable code owners or non-resolveable imports are silently ignored), however some configuration issue (non-parseable configuration files, configuration of a non-existing backend etc.) are severe errors and block the submission of all changes for which the affected configuration files are relevant.
NOTE: It's possible to disable the validation of code owner config files on push and setup an external validation by a CI bot instead. In this case findings would be posted on the change.
All validations are best effort to prevent invalid configurations from entering the repository, but not all possible issues can be prevented. Doing the validation is useful since it prevents most issues and also gives quick feedback to uploaders about typos (e.g. if an email is misspelled it's not breaking anything, but the intended change of the uploader is not working).
No validation is done when:
@PLUGIN@plugin is not installed/enabled (this means when the
@PLUGIN@plugin gets installed/enabled, it is possible that invalid configuration files already exist in the repository)
In addition for code owner config files no validation is done when:
@PLUGIN@plugin configuration is invalid (in this case we don't know which files are code owner config files, so we allow all uploads rather than blocking all uploads, to reduce the risk of breaking the plugin configuration
code-owner.configfiles are validated too)
In addition it is possible that code owner config files get issues after they have been submitted:
When updating code owner config files the validation only rejects the update if it introduces new issues. This means the update is allowed if:
For code owner config files the validation may also be performed on submit (in addition to the validation that is performed on upload of the change, see enableValidationOnSubmit config setting). Repeating the validation on submit can make sense because relevant configuration can change between the time a change is uploaded and the time a change is submitted. If enabled, on submit we repeat the exact same validation that was done on upload. This means, all visibility checks will be done from the perspective of the uploader.
It's possible to enable validation of code owner config files on branch creation (off by default).
If the validation is enabled and a new branch is created, all code owner config files that are contained in the initial commit are newly validated, even if the branch is created for a commit that already exists in the repository.
Validating code owner config files newly when a branch is created makes sense because:
foois being created a code owner config file that is referenced by such an import is expected to be found in the branch
fooof the other project, but this branch may not exist there so that the import is unresolvable. By validating the code owner config files on branch creation such unresolvable imports are detected and flagged.
What should be done if the creation of a branch fails due to invalid code owner config files is explained in the config FAQs.
By setting the
code-owners~skip-validation push option it is possible to skip the code owner config validation on push:
git push -o code-owners~skip-validation origin HEAD:refs/for/master
For the Create Branch, Create Change, the Cherry Pick Revision and the Rebase REST endpoints skipping the code owner config validation is possible by setting
code-owners~skip-validation with the value
true as a validation option in the input (see field
Using the push option or the validation option requires the calling user to have the
Can Skip Code Owner Config Validation global capability. Host administrators have this capability implicitly assigned via the
Administrate Server global capability.
NOTE: Using this option only makes sense if the code owner config validation on submit is disabled, as otherwise it's not possible to submit the created change (using the push option only skips the validation for the push, but not for the submission of the change).
For code owner config files the following checks are performed:
NOTE: Whether commits that newly add non-resolvable code owners and non-resolvable imports are rejected on commit received and on submit is controlled by the rejectNonResolvableCodeOwners and rejectNonResolvableImports config settings.
The following things are not checked (not an exhaustive list):
For the code-owner.config in the
refs/meta/config branch the following checks are performed:
code-owner.configfile is parseable
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