Add changes line

[axdiamond]

This addresses #165

Onefetch will now show a changes line when there are uncommitted changes in the repo!

Basically, it takes the output of git diff --shortstat HEAD, and replace the text with appropriate symbols.

files changed into +-
insertions(+) into +
deletions(-) into -

[o2sh]

Thanks a lot for your contribution @axdiamond

Few remarks:

• I think it would be better to call it Pending instead of Changes, to let the user know that this are only uncommited changes + it prevents having to treat singular/plural cases --> Change(s)
• About the positioning, maybe place it just below HEAD
• You are mixing information at line level (insertion(s)(+), deletion(s)(-)) with information at file level (file(s) changed), maybe git diff ---shortstat is not the right command for the job...We only want file level infos for now, git status shows it pretty well.

Looking forward to merge your PR 👍

[axdiamond]

@o2sh I did the other changes, but I'm not sure how to get lines changed from git.

git status only shows files modified, not lines.

Do you have any suggestions on how I should get the lines changed?

[o2sh]

git status only shows files modified, not lines.

That's right, we are only interested in file level changes.

[axdiamond]

Ooooohhh I'm a silly goose.

How does it look now?

[axdiamond]

I'm new to rust btw, so any nitpicking is welcome!

[o2sh]

I detected one missing checks --> "A" | "AM" |"??" => added += 1, (AM)

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if one of these

let mut deleted = 0;
let mut added = 0;
let mut modified = 0;

remains equal to zero, it shouldn't be shown in the result.

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I'm new to rust btw, so any nitpicking is welcome!

LGTM, @spenserblack did I miss smth?

[o2sh]

if (modified == 0 || modified && added == 0) , you get a leading whitespace --> I'll trim the result.

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Thanks a lot for your help @axdiamond , your contribution was very much appreciated 🥇