Announcement: Dependabot no longer supports Bundler v1

[jonjanego]

As of October 7, 2024, Dependabot no longer supports Bundler version 1, which has reached its end-of-life. If you continue to use Bundler version 1, Dependabot will be unable to create pull requests to update your dependencies. If this affects you, we recommend updating to a supported release of Bundler. As of October 2024, the newest supported version is 2.5.

Please view Bundler's official support policies for more information about supported releases.

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Here's some additional info to help you understand error messages you may see from Dependabot now, and what you can do to resolve them:

Case 1: Bundler Version is v1

• Action Required: Upgrade your Bundler to v2.
  • If all dependencies are compatible with Bundler v2, the update will proceed successfully.
  • If any dependencies are incompatible, you will encounter the following error:
    • Error Message: "Dependabot can't resolve your Ruby dependency files"

Case 2: Bundler Version Not Specified in Gemfile.lock

• Action Required: Ensure your project is compatible with Bundler v2.
  • If all dependencies are compatible with Bundler v2, the update will succeed.
  • If any dependencies are incompatible, you will encounter the following error:
    • Error Message: "Dependabot can't resolve your Ruby dependency files"

Case 3: No Bundler Version Present (No Gemfile.lock)

• No Action Required: Dependabot will continue running as expected, and Bundler v2 will be used by default.

Case 4: Bundler Version is v2

• No Action Required: Dependabot will continue to function as expected using Bundler v2.

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An example of an error that you could encounter if there's an incompatible dependency:

Bundler::SolveFailure with message: Could not find compatible versions

Because rails >= 4.0.0.beta1, < 5.0.5.rc1 depends on bundler >= 1.3.0, < 2.0
  and the current Bundler version (2.5.16) does not satisfy bundler >= 1.3.0, < 2.0,
  rails >= 4.0.0.beta1, < 5.0.5.rc1 cannot be used.
So, because Gemfile depends on rails = 4.0.0,
  version solving has failed.

Your bundle requires a different version of Bundler than the one you're running.
Install the necessary version with `gem install bundler:2.0.0.pre.3` and rerun bundler using `run.rb _2.0.0.pre.3_`