Gary Pendergast 3d1714de71 Coding Standards: Move the remaining PHPCS errors to report as warnings, and add Travis tests.
The remaining error-level coding standards issues (specifically, associated with the sniffs `WordPress.PHP.YodaConditions.NotYoda`, `WordPress.NamingConventions.ValidVariableName.VariableNotSnakeCase`, `WordPress.DB.PreparedSQL.InterpolatedNotPrepared`, `WordPress.DB.PreparedSQL.NotPrepared`, and `WordPress.Files.FileName.InvalidClassFileName`) are marked as warnings, until they're all addressed.

This change allows us to run linting on Travis across the entire codebase, ensuring no other error-level violations can be introduced.

Additionally, PHPCS will now cache results locally, drastically improving performance for subsequent checks: scanning the entire codebase takes 1-2 minutes the first time, and less than one second for subsequent checks.

See #47632.



git-svn-id: https://develop.svn.wordpress.org/trunk@45665 602fd350-edb4-49c9-b593-d223f7449a82
2019-07-19 07:47:16 +00:00
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