Make sure update-factory doesn't reinstall the same image as was used
the last time and make it easy to get a version of factory image for
easier comparison.

Showing size of the snapshots no longer works. In the past the output of
the quota command looked like this:

qgroupid         rfer         excl
--------         ----         ----
0/5          16.00KiB     16.00KiB

Nowadays it contains a patch as well and the final output is as follows:

Qgroupid    Referenced    Exclusive   Path
--------    ----------    ---------   ----
0/1386         2.46GiB     60.34MiB   @135

So updating schnapps to be able to parse the second output as well. In
theory even better would be to use json output and do the math to get
human readable output, but doing math in shell is not a great idea, so
sticking with the text output for now.

The previous regex was matching strings that shouldn't have been
matched, resulting in colons being placed in the wrong spots.
Url "ssh://user@host:path/path" transformed into "user@host:path:/path"

Basically just alias for local://, but pointed out that some people
might try it intuitively although it should be pointing to a directory
and not a file.

We had a request to backup snapshots to locally mounted drive. It makes
sense, if you have for example connected external drive. In theory I
could have switched to the directory and work there, but wanted to
simplify working with remote storages and make it as similar as possible
so I'm using bind mount. Should nicely "isolate" and test the selected
storage.

Document "secret" functionality that allows to import new factory image.

Add support for updating factory image without need to provide exact
link.

I forgot to shift arguments after parsing -c option.

Karel Koci authored 3 years ago and Michal Hrusecky committed 3 years ago

Although JSON is a good format for parsing in languages such as Python
it gets too complex for shell parsing. The CSV format is way better for
that.

Turns out that we are actually using the parsed configuration in showing
help, so let's keep all the configuration together. It is nicer that way
anyway. But let's move the die function to the top so we can use it
during configuration parsing. Fortunately we don't need die_hepling
function which would cause a cycle.

It has some naming conflicts with functions we use and overwrites them,
so move it back to the beginning so it wouldn't break other stuff.

* In listing snapshots, the snapshot number does not necessary need to
  be a number anymore, especially with remote snapshots. So let's put ti
  in quotes so it is always a string.
* Error our when cleanup is called with invalid arguments.
* Error out early if we can't even create temp directory.
* Error out early if we can't guess the device to work on.
** Move configuration parsing to the end right before commands processing

Support multiple files with patterns excluded from backup.

We might want to add few extra files to the exported tarball. Like some
uci-defaults script to adapt configuration to new hardware - change the
MACs to the correct ones and if serial changed, regenerate device token
and such.

We might want to exclude various certificates during export, especially
fosquito ones that are tied to serial number and thus will not work on
other/replacement device.

Put quotes in correct places where davfs expects them, escape
potentially dangerous characters like spaces in passwords and make sure
the final secrets file have permissions required by davfs.

Extend syntax to allow smb:3.1.1://host/share URLs to specify specific
dialect of Samba to speak.

approximately halves the time schnapps list takes at the cost of being a
bit less generic

Drop mixed in tabs and update copyright.

Sometimes you have a lot space on your server and want to delete backups
manually.