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bug#22470: 25.1.50; vc-annotate (HG) does not display changes within one

From: Dmitry Gutov
Subject: bug#22470: 25.1.50; vc-annotate (HG) does not display changes within one day (colors)
Date: Wed, 27 Jan 2016 03:03:26 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:44.0) Gecko/20100101 Thunderbird/44.0

On 01/26/2016 09:50 PM, Glenn Morris wrote:

FWIW, I see no difference between current master and emacs-25.
It also seems self-evident to me that if you've set the date to only
display at the level of days, you'll only get colouring at the same

The current vc-annotate behavior for hg seems consistent with eg git.

Both true statements. However, it is possible to both show short dates and colorize at the minute resolution, e.g. by asking for a detailed date format from the backend program, and then turning those dates into short ones when parsing the output. Something to consider for the next release, maybe.

Finally, at a very quick glance that ahg thing seems to colorize based
on revision number, not on age, which is a different scheme.

I do wonder if aHg's approach is better. The default palette mapping doesn't convey to me, personally, any particular information about time. I had to glance at the relevant variable and its value to understand that red means "new", blue means "old", and green and orange are somewhere in between. I'll probably forget this soon enough.

The only way we could make the color intuitive, I think, is by using some linear gradient, and then, I fear, the difference in color between revisions made on close days might be too small to notice.

Simply showing that these lines of code were produce by the same revision, and those and those by two different ones, seems more valuable anyway.

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