IssueTracker

It looks like we implemented a really poor workaround that looks like this:

task.outputs.upToDateWhen {
  // Workaround for b/193244776
  // Ensure the task runs if baselineFile is set and the file doesn't exist
  task.projectInputs.lintOptions.inputBaselineFile.orNull?.asFile?.exists() ?: true
}

I don't think this is correct. We need to change how we handle this file. We cannot have a task read and generate this file. If we want to handle baseline file generation we need to change things.

I think an option we should look at is to generate a baseline file in the output folder when running a normal lint (this can be driven by a boolean DSL flag) and either ask people to copy it there, or simply update the updateLintBaseline task to just copy from the output back to the location indicated in the DSL. This would make this second task much simpler (right now it's a full on lint task!) and would solve the issue of a single task both reading and generating this file.

Any updates here? I'd love for us to drop upToDateWhen

Still on the radar, but no update

Now that we have the updateLintBaseline task, we should encourage users to use it by doing the following:

• Update the lint error message with instructions for running the task.
• Update the lint user guide.
• Update the documentation on DAC.
• Add AGP release notes about the change.

All of the above changes should be added for AGP 8.0 (no functional changes... mostly just documentation of the existing feature).

Proposed schedule for future AGP releases:

- (AGP 8.1) Warn users when they run lint with a lint baseline file set in the DSL but the file doesn't exist - unless android.experimental.lint.missingBaselineIsEmptyBaseline=true

- (AGP 9.0) Error instead of warning - remove lint baseline as output of lint task

Edit: removed the proposed breaking change because Change-Id: I818e5812d8a4b45a1024618ecaec399439569dfc removed the lint baseline as an output without the need for the breaking change.

Closing this bug because the baseline file is no longer an output.

Created Issue 260118818 to track updates to docs.