Ryan Hitchman 77bf148460 backup: add --dry-run/-n flag to show what would happen. ... This can be used to check how large a backup is or validate exclusions. It does not actually write any data to the underlying backend. This is implemented as a simple overlay backend that accepts writes without forwarding them, passes through reads, and generally does the minimal necessary to pretend that progress is actually happening. Fixes #1542 Example usage: $ restic -vv --dry-run . | grep add new /changelog/unreleased/issue-1542, saved in 0.000s (350 B added) modified /cmd/restic/cmd_backup.go, saved in 0.000s (16.543 KiB added) modified /cmd/restic/global.go, saved in 0.000s (0 B added) new /internal/backend/dry/dry_backend_test.go, saved in 0.000s (3.866 KiB added) new /internal/backend/dry/dry_backend.go, saved in 0.000s (3.744 KiB added) modified /internal/backend/test/tests.go, saved in 0.000s (0 B added) modified /internal/repository/repository.go, saved in 0.000s (20.707 KiB added) modified /internal/ui/backup.go, saved in 0.000s (9.110 KiB added) modified /internal/ui/jsonstatus/status.go, saved in 0.001s (11.055 KiB added) modified /restic, saved in 0.131s (25.542 MiB added) Would add to the repo: 25.892 MiB		2021-08-04 21:19:29 +02:00
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backup.go	backup: add --dry-run/-n flag to show what would happen.	2021-08-04 21:19:29 +02:00