Support git-lfs?

[wlandau]

I am trying to use gert with git-lfs, and it looks like it does not work out of the box.

library(gert)
#> Linking to libgit2 v1.1.0, ssh support: YES
#> Global config: /home/CENSORED/.gitconfig
#> System config: /etc/gitconfig
#> Default user: wlandau will.landau@lilly.com
writeLines("contents", "file.txt")
writeLines("file.txt filter=lfs diff=lfs merge=lfs -text", ".gitattributes")
git_init()
git_add("file.txt")
#> # A tibble: 5 x 3
#> file status staged
#>
#> 1 .gitattributes new FALSE
#> 2 file.txt new TRUE
#> 3 sand-viper_reprex.R new FALSE
#> 4 sand-viper_reprex.spin.R new FALSE
#> 5 sand-viper_reprex.spin.Rmd new FALSE
git_commit("First commit")
#> [1] "117017fc494d2654bae1fd96dedf5149f8bd74a3"
list.files(".git/lfs")
#> character(0)

But it does work in the Linux terminal.

```sh
$ echo "contents" >> file.txt
$ echo "file.txt filter=lfs diff=lfs merge=lfs -text" >> .gitattributes
$ git init
$ git add file.txt
$ git commit -m "First commit"
$ ls .git/lfs
objects  tmp

From git-lfs/git-lfs#375 and libgit2/libgit2sharp#1236, it looks like libgit2 + git-lfs is not automatic. Is this something at all feasible in gert?

[meowcat]

I would also be very interested in git lfs support.