Example of git-refs

[samuel-p]

Is there an example of how to use git-refs datasource?

I want to get updates for an git repository, to merge it into my current project. I also don't know if it is even the right datasource to achieve this.

[rarkins]

Are you using the regex manager? I'm not sure we have a use case for git-refs in the codebase currently.

[samuel-p]

Yes I'm using the regex manager or at least tried to. I want to build a Docker image for a git repository and rebuild it if the repository gets updated. Here's the config I have for now:

{
  "regexManagers": [{
      "fileMatch": ["^Dockerfile$"],
      "matchStrings": ["\\s+ENV\\s*COMMIT_HASH=\"(?<currentVersion>.*?)\"\\s+"],
      "depNameTemplate": "<git-url>",
      "versioningTemplate": "git",
      "datasourceTemplate": "git-refs"
  }]
}

[rarkins]

The commit hash would need to be the currentDigest, not currentVersion.

[samuel-p]

If I change currentVersion to currentDigest renovatebot creates the following issue:

There is an error with this repository's Renovate configuration that needs to be fixed. As a precaution, Renovate will stop PRs until it is resolved.
File: renovate.json
Error type: The renovate configuration file contains some invalid settings
Message: Regex Managers must contain currentValueTemplate configuration or regex group named currentValue

[rarkins]

Can you try setting currentValueTemplate to be the name of the default branch? e.g. master or main? If that fails, try setting it to null. It may just be necessary for validation and not the lookup itself.

[samuel-p]

For both, main and null i get the following issue:

There is an error with this repository's Renovate configuration that needs to be fixed. As a precaution, Renovate will stop PRs until it is resolved.
File: renovate.json
Error type: The renovate configuration file contains some invalid settings
Message: Invalid configuration option: regexManagers[0].currentValueTemplate, Regex Manager contains disallowed fields: currentValueTemplate

[samuel-p]

If I add currentValue as an empty group to the regex and change it to \s+ENV\s*MORTY_VERSION="(?<currentValue>)(?<currentDigest>.*?)"\s+ it works.

The full config now looks like this:

{
  "regexManagers": [{
      "fileMatch": ["^Dockerfile$"],
      "matchStrings": ["\s+ENV\s*COMMIT_HASH="(?<currentValue>)(?<currentDigest>.*?)"\s+"],
      "depNameTemplate": "<git-url>",
      "versioningTemplate": "git",
      "datasourceTemplate": "git-refs"
  }]
}