The state object is sometimes undefined in the onclick method of the
line by line panel. Because we set it to nil in a bunch of places,
I've decided to just change the main context to 'normal' before setting
it to nil anywhere. That way the keybindings for the line by line panel
won't get executed and we won't get a segfault.
When staging lines (or doing anything that requires the main view to split into two)
we want to split vertically if there's not much width available in the window.
If there is enough width we will split horizontally. The aim here is to allow for
sufficient room in the side panel. We might need to tweak this or make it configurable
but I think it's set to a pretty reasonable default i.e. switching to split vertically
when the window width falls under 220
Up till now our approach to rendering things like file diffs, branch logs, and
commit patches, has been to run a command on the command line, wait for it to
complete, take its output as a string, and then write that string to the main
view (or secondary view e.g. when showing both staged and unstaged changes of a
file).
This has caused various issues. For once, if you are flicking through a list of
files and an untracked file is particularly large, not only will this require
lazygit to load that whole file into memory (or more accurately it's equally
large diff), it also will slow down the UI thread while loading that file, and
if the user continued down the list, the original command might eventually
resolve and replace whatever the diff is for the newly selected file.
Following what we've done in lazydocker, I've added a tasks package for when you
need something done but you want it to cancel as soon as something newer comes
up. Given this typically involves running a command to display to a view, I've
added a viewBufferManagerMap struct to the Gui struct which allows you to define
these tasks on a per-view basis.
viewBufferManagers can run files and directly write the output to their view,
meaning we no longer need to use so much memory.
In the tasks package there is a helper method called NewCmdTask which takes a
command, an initial amount of lines to read, and then runs that command, reads
that number of lines, and allows for a readLines channel to tell it to read more
lines. We read more lines when we scroll or resize the window.
There is an adapter for the tasks package in a file called tasks_adapter which
wraps the functions from the tasks package in gui-specific stuff like clearing
the main view before starting the next task that wants to write to the main
view.
I've removed some small features as part of this work, namely the little headers
that were at the top of the main view for some situations. For example, we no
longer show the upstream of a selected branch. I want to re-introduce this in
the future, but I didn't want to make this tasks system too complicated, and in
order to facilitate a header section in the main view we'd need to have a task
that gets the upstream for the current branch, writes it to the header, then
tells another task to write the branch log to the main view, but without
clearing inbetween. So it would get messy. I'm thinking instead of having a
separate 'header' view atop the main view to render that kind of thing (which
can happen in another PR)
I've also simplified the 'git show' to just call 'git show' and not do anything
fancy when it comes to merge commits.
I considered using this tasks approach whenever we write to a view. The only
thing is that the renderString method currently resets the origin of a view and
I don't want to lose that. So I've left some in there that I consider harmless,
but we should probably be just using tasks now for all rendering, even if it's
just strings we can instantly make.
By default, macs have 256 open files allowed by a given process.
This sucks when you end up with over 256 files modified in a repo
because after you've watched all of them, lots of other calls to
the command line will fail due to violating the limit.
Given there's no easy platform agnostic way to see what you've got
configured for how many files a process can have open, I'm going to
arbitrarily set the max to 200 and when we hit the limit we start
unwatching older files to make way for new ones.
WIP
For this to work you'll need to put this in your ~/.zshrc (or equivalent rc file):
lg()
{
export LAZYGIT_NEW_DIR_FILE=/Users/jesseduffieldduffield/Library/Application\ Support/jesseduffield/lazygit/.lastd
lazygit "$@"
if [ -f $LAZYGIT_NEW_DIR_FILE ]; then
cd "$(cat $LAZYGIT_NEW_DIR_FILE)"
rm -f $LAZYGIT_NEW_DIR_FILE > /dev/null
fi
}
Previously we were recording output from subprocesses using a multiwriter
and hooking that up to the cmd's stdout to write to both os.Stdout and
a buffer. We would then display the output after the program finished.
This worked well for commands like 'ls' but not for commands like 'vi'
which expect you to be in a tty, and when you've got the cmd's stdout
pointing at a multiwriter, the subprogram thinks we're not in a tty
and then things like terminal corruption can happen. This was the case
with neovim, and even in vim a warning was given with a pause before
starting the program.
Now we're chucking out the multiwriter and instead making it that you
need to press enter after the program has finished to return to lazygit.
This allows you to view the output of the program (e.g. if it's ls) and
then decide that you want to return. It's one level of unnecessary
redirection for editors like vim, but even they could potentially have
output to stderr/stdout that you want to look at before returning.
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