On 2013-09-30 at 03:11:28, ja...@treshna.com wrote: > Package: git > Version: 1:1.7.10.4-1+wheezy1 > Severity: wishlist > > Dear Maintainer, > > if I run "git diff" in a gnome-terminal I get a colorized output but > the scroll wheel doesn't work > > if I run "git diff --color | less -r" > > The scroll wheel works. > > It seems that when git launches less, less doesn't switch to the > alternate screen and thus gnome-terminal doesn't translate scroll > events.
I can reproduce this behaviour, but I think it's documented and
expected. Git documents the core.pager environment variable like so:
When the LESS environment variable is unset, Git sets it to FRX (if
LESS environment variable is set, Git does not change it at all). If
you want to selectively override Git’s default setting for LESS, you
can set core.pager to e.g. less -S. This will be passed to the
shell by Git, which will translate the final command to LESS=FRX
less -S. The environment does not set the S option but the command
line does, instructing less to truncate long lines. Similarly,
setting core.pager to less -+F will deactivate the F option
specified by the environment from the command-line, deactivating the
"quit if one screen" behavior of less. One can specifically activate
some flags for particular commands: for example, setting pager.blame
to less -S enables line truncation only for git blame.
So the default behaviour is to set LESS=FRX, and the X option does
indeed cause the situation you describe (I tested in Alacritty
0.13.2-4+b1 from unstable). However, you can set the `GIT_PAGER`
environment variable or `core.pager` config option and get the behaviour
you want. For instance, this seems to work for me:
GIT_PAGER="env -u LESS less -FR" git log
Then I can scroll up and down with the mouse.
I'm not sure for the reason for the entire set of options, but the F
option at least comes from the desire to avoid needing to exit the pager
if there's just one page of text. That's why a small diff for git diff
doesn't require the pager.
--
brian m. carlson (they/them or he/him)
Toronto, Ontario, CA
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