Commit Graph

68 Commits

Author SHA1 Message Date
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
Michael Eischer 7cb8ea69ba Add test to mintty pipe detection 2021-04-11 20:02:09 +02:00
Michael Eischer 80564a9bc9 Properly detect mintty output redirection
mintty on windows always uses pipes to connect stdout between processes
and for the terminal output. The previous implementation always assumed
that stdout connected to a pipe means that stdout is displayed on a
mintty terminal. However, this detection breaks when using pipes to
connect processes and for powershell which uses pipes when redirecting
to a file.

Now the pipe filename is queried and matched against the pattern used by
msys / cygwin when connected to the terminal. In all other cases assume
that a pipe is just a regular pipe.
2021-04-11 20:02:09 +02:00
Michael Eischer 5e6af77b7a Unify interactive terminal detection code
Previously the progress bar / status update interval used
stdoutIsTerminal to determine whether it is possible to update the
progress bar or not. However, its implementation differed from the
detection within the backup command which included additional checks to
detect the presence of mintty on Windows. mintty behaves like a terminal
but uses pipes for communication.

This adds stdoutCanUpdateStatus() which calls the same terminal detection
code used by backup. This ensures that all commands consistently switch
between interactive and non-interactive terminal mode.

stdoutIsTerminal() now also returns true whenever stdoutCanUpdateStatus()
does so. This is required to properly handle the special case of mintty.
2021-04-11 20:02:09 +02:00
Alexander Neumann 0858fbf6aa Add more error handling 2021-01-30 20:19:47 +01:00
Alexander Neumann 3c753c071c errcheck: More error handling 2021-01-30 20:02:37 +01:00
MichaelEischer 43cb26010a
Merge pull request #3242 from greatroar/fprintln
internal/ui/termstatus: Use Fprintln to get a newline
2021-01-28 20:34:06 +01:00
greatroar b9cfe6f68a internal/ui/termstatus: Use Fprintln to get a newline 2021-01-28 13:30:10 +01:00
Michael Eischer ddb7697d29 restic: Test progress reporting of StreamTrees 2021-01-28 11:10:50 +01:00
Michael Eischer 313ad0e32f progress/counter: Fix test for final report call 2021-01-28 11:10:50 +01:00
Michael Eischer 505f8a2229 progress/counter: Support updating the progress bar maximum 2021-01-28 11:10:47 +01:00
Alexander Neumann c5a66e9181 ui: Simlify channel receive 2021-01-28 10:42:02 +01:00
Michael Eischer cff4955a48 ui: remove dead struct member 2020-12-29 16:32:18 +01:00
Michael Eischer 92da5168e1 ui: force backup progress update on signal 2020-12-29 16:32:18 +01:00
Michael Eischer 34afc93ddc ui/progress: extract signal handling into own package 2020-12-29 16:32:18 +01:00
Michael Eischer 023eea6463 ui: don't shorten non-interactive progress output 2020-12-29 16:32:18 +01:00
Michael Eischer 684600cf42 ui: update status for the backup command on non-interactive terminals
Allow the backup command to print status on non-interactive terminals.
The output is disabled by setting a MinUpdatePause == 0.
2020-12-29 16:03:43 +01:00
Michael Eischer 13ce981794 ui: cleanup backup status shutdown 2020-12-29 16:03:43 +01:00
Michael Eischer c2ef049f1b ui/progress: don't print progress on non-interactive terminals
This reverts to the old behavior of not printing progress updates on
non-interactive terminals. It was accidentally changed in #3058.
2020-12-29 16:03:43 +01:00
greatroar 3b09ae9074 AIX port 2020-12-29 01:35:01 +01:00
Alexander Neumann 6c514adb8a ui/progress: Use mutex instead of atomic
The counter value needs to be aligned to 64 bit in memory for the
atomic functions to work on some platform (such as 32 bit ARM).

The atomic package says in its documentation:

> These functions require great care to be used correctly. Except for
> special, low-level applications, synchronization is better done with
> channels or the facilities of the sync package.

This commit replaces the atomic functions with a simple sync.Mutex, so
we don't have to care about alignment.
2020-12-22 21:03:27 +01:00
Alexander Neumann ba31c6fdaa
Merge pull request #3150 from MichaelEischer/fix-windows-redir-output
termstatus: Fix canUpdateStatus detection for redirected output on windows
2020-12-06 21:17:27 +01:00
Michael Eischer b48f579530 termstatus: Fix canUpdateStatus detection for redirected output
The canUpdateStatus check was simplified in #2608, but it accidentally flipped
the condition. The correct check is as follows: If the output is a pipe then
restic probably runs in mintty/cygwin. In that case it's possible to
update the output status. In all other cases it isn't.

This commit inverts to condition again to offer the previous and correct
behavior.
2020-12-06 19:02:42 +01:00
Michael Eischer 401ef92c5f backup: Fix shutdown hang when running in the background
On shutdown the backup commands waits for the terminal output goroutine
to stop. However while running in the background the goroutine ignored
the canceled context.
2020-12-06 18:53:41 +01:00
greatroar ddca699cd2 Replace restic.Progress with new progress.Counter
This fixes two race conditions while cleaning up the code.
2020-11-09 12:12:35 +01:00
greatroar 3ed84ff0c6 Fix string truncation in ui/termstatus
Fixes #3046.
2020-11-02 12:50:49 +01:00
MichaelEischer ad3a52e6f0
Merge pull request #3026 from greatroar/refactor-ui
internal/ui refactoring
2020-10-25 17:51:39 +01:00
greatroar 35419de232 Simplify ui.StdioWrapper.Write
Instead of looping to find line breaks, make it look for the last one.
2020-10-17 20:30:46 +02:00
greatroar 863a590a81 Refactor termstatus.Term.{Print,Error} methods 2020-10-17 20:30:46 +02:00
greatroar 7c0b6a82db Remove unused public method ui.linesWriter.Flush 2020-10-17 20:30:24 +02:00
greatroar f80b07b2c8 Fix IsProcessBackground on Linux with stdin redirection
The previous implementation assumed that stdin was a terminal.
It now checks the terminal's fd.
2020-10-13 13:12:02 +02:00
Alexander Neumann 5fd3dbccb7
Merge pull request #2963 from MichaelEischer/fix-status-deadlock
backup: Fix possible deadlock of scanner goroutine
2020-10-09 21:35:50 +02:00
greatroar f3e933f0c1 Use windows.SetConsoleCursorPosition in ui/termstatus 2020-10-07 11:18:54 +02:00
Michael Eischer d44df9d00d backup: Always remove the status lines once a backup ends 2020-09-30 23:13:10 +02:00
Michael Eischer 8d0ba55ecd backup: Fix possible deadlock of scanner goroutine
When the backup is interrupted for some reason while the scanner is
still active this could lead to a deadlock. Interruptions are triggered
by canceling the context object used by both the backup progress UI and
the scanner. It is possible that a context is canceled between the
respective check in the scanner and it calling the `ReportTotal` method
of the UI. The latter method sends a message to the UI goroutine.
However, a canceled context will also stop that goroutine, which can
cause the channel send operation to block indefinitely.

This is resolved by adding a `closed` channel which is closed once the
UI goroutine is stopped and serves as an escape hatch for reported UI
updates.

This change covers not just the ReportTotal method but all potentially
affected methods of the progress UI implementation.
2020-09-30 23:13:10 +02:00
Michael Eischer dc31529fc3 Unindent else block after if block ending with a return statement 2020-09-05 10:07:16 +02:00
Michael Eischer 2f8335554c Remove a few unused variables 2020-09-05 10:06:23 +02:00
Brian Atkinson b8da7b1f4d termstatus: Use io.WriteString to output messages.
The previous implementation was repeating the implementation that is
found inside of io.WriteString. Simplify by making use of the stdlib's
implementation.
2020-03-26 14:55:00 -07:00
greatroar 751eba0e68 Remove unnecessary pipe checks in termstatus
canUpdateStatus has already determined that the file descriptor is not a
pipe.
2020-02-29 18:03:49 +01:00
greatroar 7447c44484 Use golang.org/x/sys/windows in termstatus
Some functionality is missing, but at least the types are all defined.
Replaced short, word, dword by their Go names to match the x/sys
convention.
2020-02-29 18:03:49 +01:00
greatroar c8a672fa29 Remove code copy-pasted from x/crypto/ssh/terminal 2020-02-29 18:03:49 +01:00
greatroar 863ba76494 Drop mattn/go-isatty in favor of crypto/ssh/terminal 2020-02-29 18:03:47 +01:00
Michael Eischer 42a3292bcf Better name for jsonstatus package
internal/ui/jsonstatus and termstatus sound similar but are not related
in any way. Instead `internal/ui/backup` and `internal/ui/jsonstatus/status`
are the counterparts. Rename the latter to `internal/ui/json/backup` to
make this clear.
2020-02-13 21:14:20 +01:00
Michael Eischer ef70a2fcb3 Fix mangled JSON output by backup command
jsonstatus wrote the JSON output without synchronization to the
stdio_wrapper which caused mangling between different status lines.

Use the Print and Error methods of termstatus instead which use a
central goroutine to synchronize output.
2020-02-13 21:14:20 +01:00
Lars Lehtonen 57815d9cd6
restic/internal/ui: fix gofmt nit that popped up in Go 1.13 2020-02-10 11:06:47 -08:00
Daniel Hoffend e7cdf2acbb fix backup --json total_bytes_processed output
Closes #2429
2020-02-09 02:02:45 +01:00
Alexandr Bruyako 76d1866444 avoiding unnecessary type conversions 2019-06-30 23:58:00 +03:00
Alexandr Bruyako 16eeed2ad5 simplified string sorting by using a more suitable function 2019-06-30 23:20:32 +03:00
Alexander Neumann 8906d85ab8 Merge pull request 2138 from restic/fix-2136
Use processed bytes for summary
2019-02-10 12:32:50 +01:00
Matthew Holt 6cf13483b5 Add snapshot ID to summary output 2019-02-10 12:09:09 +01:00