Add nvim-remote editor preset

This allows us to jump back to the parent neovim process when we want to edit a file, rather than opening a new neovim
process within lazygit.

Arguably this should be the default, but I'm not familiar with the various ways people use lazygit with neovim.

docs/Config.md

@@ -324,10 +324,13 @@ os:
  editPreset: 'vscode'
 ```
 
-Supported presets are `vim`, `nvim`, `emacs`, `nano`, `vscode`, `sublime`, `bbedit`,
+Supported presets are `vim`, `nvim`, `nvim-remote`, `emacs`, `nano`, `vscode`, `sublime`, `bbedit`,
 `kakoune`, `helix`, and `xcode`. In many cases lazygit will be able to guess the right preset
 from your $(git config core.editor), or an environment variable such as $VISUAL or $EDITOR.
 
+`nvim-remote` is an experimental preset for when you have invoked lazygit from within a neovim
+process, allowing lazygit to open the file from within the parent process rather than spawning a new one.
+
 If for some reason you are not happy with the default commands from a preset, or
 there simply is no preset for your editor, you can customize the commands by
 setting the `edit`, `editAtLine`, and `editAtLineAndWait` options, e.g.:

pkg/config/editor_presets.go

@@ -48,9 +48,17 @@ type editPreset struct {
 // IF YOU ADD A PRESET TO THIS FUNCTION YOU MUST UPDATE THE `Supported presets` SECTION OF docs/Config.md
 func getPreset(osConfig *OSConfig, guessDefaultEditor func() string) *editPreset {
  presets := map[string]*editPreset{
- "vi": standardTerminalEditorPreset("vi"),
- "vim": standardTerminalEditorPreset("vim"),
- "nvim": standardTerminalEditorPreset("nvim"),
+ "vi": standardTerminalEditorPreset("vi"),
+ "vim": standardTerminalEditorPreset("vim"),
+ "nvim": standardTerminalEditorPreset("nvim"),
+ "nvim-remote": {
+ editTemplate: `nvim --server "$NVIM" --remote-tab {{filename}}`,
+ editAtLineTemplate: `nvim --server "$NVIM" --remote-tab {{filename}}; [ -z "$NVIM" ] || nvim --server "$NVIM" --remote-send ":{{line}}<CR>"`,
+ // No remote-wait support yet. See https://github.com/neovim/neovim/pull/17856
+ editAtLineAndWaitTemplate: `nvim +{{line}} {{filename}}`,
+ openDirInEditorTemplate: `nvim --server "$NVIM" --remote-tab {{dir}}`,
+ editInTerminal: false,
+ },
  "emacs": standardTerminalEditorPreset("emacs"),
  "nano": standardTerminalEditorPreset("nano"),
  "kakoune": standardTerminalEditorPreset("kak"),