On 2019/06/17 20:38, Linus Torvalds wrote:
On Sun, Jun 16, 2019 at 12:24 PM Willem Ferguson
<[email protected]> wrote:
For data security when something wrong has happened to a dive log, it
would be invaluable if one could request "Open die dive log as it was on
October 1st 2018". Is something like this in principle possible with
git?
Git can maintain a per-branch log of when things changed, but libgit2
(which we use) does not.
Also, even if it were to be there, it's per-repository and doesn't get
distributed out to the cloud (because by definition the dates when
something happened are local - what you saw in one repo back in
October might have showed up in another repository much later).
So the date-based one is not going to be much of an option, although I
guess we could add some way for people to at least see *when* some git
commit was made.
Linus
Linus,
Thank you very much. You answered my question comprehensively. I have
many things to think about.
One of the (quite a few) things that differentiates Subsurface from
other equivalent software is the usage of a git repository as a dive
log. It is not just another data format, comparable to XML or CSV. git
is a whole infrastructure that strengthens dive log security immensely.
And once a diver has passed the 100 dive mark I would expect that data
security is becoming an issue and the ability to recover from a stupid
mistake or oversight is possible with git. I guess the rhetorical
question is how could one make git work for a user who is not very
computer savvy? And the answer to that question looks like "Yes, but it
would require an enormous coding effort". I am pretty impressed with the
ability to use Subsurface to open the dive log at a specific commit. I
am going to try that one.
Thanks for your time.
Kind regards,
willem
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