[TI-1] Add an 'undo' command about timewarrior HOT 13 CLOSED

Documentation on the undo command can be found here: undo man page
The command will be part of timewarrior 1.2.0, so the documentation is currently in the sources only. Website will follow.

There is an issue for the problem with the 'm' duration prefix: #133

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Migrated metadata:

Created: 2016-04-08T12:30:48Z
Modified: 2016-08-16T20:25:24Z

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I am closing this ticket because of age. Currently there is no (urgent) need for an undo command. Corrections on intervals can be done with shorten/lengthen/move/...

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My taskwarrior is connected to my TimeWarrior. I changed the scheme of my projects and tags in taskwarrior. I wanted to batch such a change in the history of timewarrior. Things went wrong. I was able to "undo" everything in my taskwarrior, but the undo command in timewarrior missed me. No other choice than restoring a backup.
The undo command would really be useful in such situation. When a tag label change, it has to be updated in the past in all records.

Another usecase :
I wanted to lengthen an interval by 30min but I lengthened it by 30m !!! then the mess occured and I had to manually edit the data files.

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It is always difficult to rewrite history.

I am curious, how you batched your change in the history of timewarrior. Did you run a script with taskwarrior commands that did your changes and timewarrior followed along with the on-modify-hook script? Or did you do your taskwarrior and timewarrior modifications separately? What was the intended goal (in timewarrior)? Renaming an existing tag? Merging assigned tags?

When a tag label change, it has to be updated in the past in all records.
When you have a tag "FOO" and you decide it should rather be called "BAR" then I agree. When you have an interval which carries label "FOO" and you change it to "BAR", I do not. And I am not sure whether this should happen automatically...

I think the last part is not directly liked to the undo command and more a feature request for timewarrior's tag command ("renaming existing tags").

Do you have a small example for your last usecase? I would have expected that if you have e.g. 2 intervals

09:00 - 10:00 FOO
11:00 - 12:00 BAR

lengthening "FOO" by <1h should work, but anything >1h should cause an error because of the resulting overlap with "BAR".

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I just made a mess of my time tracking when I went to insert a task that I forgot to track earlier in the day. I started by adding the task with minimal time, moved it to the appropriate timeslot, then attempted to lengthen it by 10 minutes.

timew complained that it would cause an overlap, and that I should use the :adjust hint to handle it automatically. I looked and there was about a minute of overlap, so I just threw :adjust onto the command line.

What I diidn't realize, because I've just started using timew is that I had specified an interval of 10 months, and with the :adjust hint it happily proceeded to remove all of the intervals that conflicted. Oops.

When I saw that there was a undo history file, and some references to an undo command in https://taskwarrior.org/docs/timewarrior/files.html I thought I was going to have a relatively easy time with it. Sadly, no.

I guess I'm going to see if there's something I can work up external to timew to simulate an undo.

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Just want to second the issue raised by @buc0 - I have mistakenly clobbered a days worth (thankfully not months!) of time tracking

given the presence of the backup data, it would be useful to undo those changes

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+1 the "m" for month is dangerous and confusing when you want to enter minutes (min) intervals. It was also one of the things that I wanted to "undo". This undo command would be really helpful to help adoption of timew. Everyone does mistakes while learning. If a mistake ruins hours of tracking during evaluation, you will not re-enter/fix the past, the stats will be inaccurate and this can be a show-stopper.

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Agreed. I am reopening this issue.

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First version of the 'undo' command implemented. Closes #9 TI-1

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I made the mistake of typing "30m", which was interpreted as "30 months".

➜  ~ timew track 30m "Christopher - what to do in his absense with flimflam questions"
You cannot overlap intervals. Correct the start/end time, or specify the :adjust hint.
➜  ~ timew track 30m "Christopher - what to do in his absense with flimflam questions" :adjust
Recorded "Christopher - what to do in his absense with flimflam questions"
  Started 2016-12-10T10:24:46
  Ended   2019-05-29T11:24:46
  Total           21600:00:00

I started using timewarrior (with taskwarrior and bugwarrior) about 3 weeks ago, loving it so far.

My question: Where can I find documentation on how to use the "undo" command in timewarrior?

EDIT I found this, it was super helpful: https://www.dp.cx/blog/taskwarrior--timewarrior--and-that-moment-it-all-goes-wrong.html

Starting point is to go to ~/.timewarrior/data, where you will find the data files. Make a backup of the files before you start, then go to the link above to see how you can use the undo.data file to recreate the data that is missing in the monthly files.

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Great addition! Thanks so much

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