* logging: cleaned up stderr logging
- do not show module
- do not show timestamps by default (enable with --console-timestamps)
* logging: replaced most printStderr() with log.Info
* cli: additional logging cleanup
Globally replaced all use of time with internal 'clock' package
which provides indirection to time.Now()
Added support for faking clock in Kopia via KOPIA_FAKE_CLOCK_ENDPOINT
logfile: squelch annoying log message
testenv: added faketimeserver which serves time over HTTP
testing: added endurance test which tests kopia over long time scale
This creates kopia repository and simulates usage of Kopia over multiple
months (using accelerated fake time) to trigger effects that are only
visible after long time passage (maintenance, compactions, expirations).
The test is not used part of any test suite yet but will run in
post-submit mode only, preferably 24/7.
testing: refactored internal/clock to only support injection when
'testing' build tag is present
`snapshot gc` marks contents not reachable from the root of any snapshot
as soft-deleted
The algorithm is a mark-and-sweep with parallel iteration of objects.
Currently it stores content IDs and object IDs in a map, so won't scale
to huge repositories, but this can be fixed in the future.
This fixes#110 at least for reasonable repository sizes.
