FR: jj log -from flag

[cflewis]

Is your feature request related to a problem? Please describe.

Follow up to #229 (comment), where without the implementation of removing empty commits from rebase, jj log gets really messy.

Describe the solution you'd like

jj log could take a -from flag which from a certain tag, rather than all the commits it knows. The obvious use cases being jj log -from main and jj log -from HEAD@git.

[cflewis]

Worth noting I figured out how to do this with shell scripting so I'm not out on a limb:

$ jj log --color=always | sed '/main/q'
@  zqywvzzo [email protected] 2023-08-28 19:28:08.000 +00:00 9b173c98
│  (empty) (no description set)
◉  nkuoktpr [email protected] 2023-08-28 19:28:08.000 +00:00 HEAD@git 3b31827a
│  [recipe_wrapper] Allow BCID tests to use real tool
◉  vzkpxvmp [email protected] 2023-08-25 21:58:20.000 +00:00 main master 794119f5

...albeit my Stack Overflow searching/script fu is insufficient to show me the subject of the commit at main :)

[ilyagr]

Have you tried jj log -r main:: or jj log -r 'main..' or jj log -r 'main..@'? The last two have the disadvantage of not showing the "root" of the log (the commits on the main branch), if that bothers you, you can also try jj log -r 'main..|(main..)-'.

I have a [revset-alias] configured to show 'siddot(from, to)'= '(from..to)|(from..to)-'. It needs a better name, and I'm wondering if we can come up with something similar that could be provided out of the box.

The docs for this (for the prerelease version) are all in https://github.com/martinvonz/jj/blob/main/docs/revsets.md.

[cflewis]

Ah, jj log -r main:: does exactly what I want!

1. What does the :: mean? Is that common jj syntax?
2. Perhaps the help text on jj log could mention this?

[ilyagr]

What does the :: mean? Is that common jj syntax?

Indeed! See the link I gave.

Perhaps the help text on jj log could mention this?

I think it would be good to mention the revset docs from jj log help.

[cflewis]

Awesome, thank you for your help. This was great and has really improved my jj experience.

I'll close this out, feel free to reopen if you want it to track any help doc changes!