[tomrittervg]

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[Copilot]

🟢 Approval recommended

No active review issues are recorded for the command-output handling, vendoring diagnostics, and license-change notification updates.

No open issues 🎉

What changed in this PR

This PR improves Updatebot’s command-output handling and vendoring diagnostics, while adding license-change notices to update bugs.

Changes:

• Standardizes command output as UTF-8 text with replacement for invalid bytes, updating callers and mocks.
• Detects changed license files and adds a review reminder to Bugzilla descriptions.
• Logs repository status when try submissions reject uncommitted changes, and adds regression and mock-interface tests.

File	Description
tests/​treeherder_api.py	Tests uncommitted-change diagnostics for failed try submissions.
tests/​scm.py	Uses text stderr in the checkout-failure mock.
tests/​run_command.py	Tests text output, invalid UTF-8 handling, and timeouts.
tests/​mock_interfaces.py	Checks mock method signatures against real providers.
tests/​mock_commandprovider.py	Returns text stdout and stderr from command mocks.
tests/​mach_vendor.py	Updates patch-failure tests to expect text output.
tests/​license_files.py	Tests license-file detection and notification text.
tests/​library.py	Tests parsing of license-file metadata.
tests/​build_bug_description.py	Uses text output in commit-detail mocks.
tests/​aiprovider.py	Returns text stdout from the AI command mock.
test.py	Registers the license-file and mock-interface test suites.
tasktypes/​vendoring.py	Detects license changes, prepends notices, and consumes text errors.
components/​scmprovider.py	Consumes Git command output directly as text.
components/​mach_vendor.py	Handles vendoring output and errors as text.
components/​logging.py	Reads version and hostname output as text.
components/​libraryprovider.py	Stores license-file metadata and consumes text command output.
components/​hg.py	Adds directory-scoped change queries and consumes text output.
components/​commandrunner.py	Decodes subprocess output centrally and handles timeout output for logging.
components/​commandprovider.py	Processes traceback stderr as text.
components/​bugzilla.py	Adds a license-change reminder template.
components/​aiprovider.py	Parses AI command output without explicit decoding.
automation.py	Reads the Updatebot version from text output.
apis/​taskcluster.py	Logs dirty-checkout status on try rejection and consumes text output.
apis/​phabricator.py	Parses Conduit and submission responses as text.

_{Review effort: Balanced}