Minor cleanups in diff tests: helper to generate (direct) object ids.
- nit: rename variables for consistency
- nit: Use `k` prefix in oids where appropriate
- nit: remove unnecessary intermediate vars
- nit: specify known map length
Adds a `--stats-only` flag to the `diff` command to reduce
output verbosity.
When `kopia diff` is invoked with the `--stats-only` flag it
only outputs the aggregate statistics of changes.
Added functionality to calculate aggregate statistics when
comparing what's changed between snapshots using kopia diff
Statistics collected during snapshot diff computation includes:
- files added/removed/modified
- dirs added/removed/modified
- files/dirs with metadata changes but same underlying content (OID)
Testing approach:
Added a test for verifying stats collected when comparing two directories with the same objectID but metadata changes across snapshots (dir mode, dir mod time, dir owner, etc), expectation is all the appropriate dir stats fields are updated.
Added another test for verifying stats collected when comparing two directories with similar file contents but the metadata for the files have changed between snapshots but content remains unchanged. Expectation is all the relevant file level stats fields are updated.
Existing tests have been updated due to stats now being printed in addition to previous output.
* chore(ci): upgraded linter to 1.53.3
This flagged a bunch of unused parameters, so the PR is larger than
usual, but 99% mechanical.
* separate lint CI task
* run Lint in separate CI
