Docs for EditCommand.

docs/Config.md

@@ -61,6 +61,9 @@ git:
   allBranchesLogCmd: 'git log --graph --all --color=always --abbrev-commit --decorate --date=relative  --pretty=medium'
   overrideGpg: false # prevents lazygit from spawning a separate process when using GPG
   disableForcePushing: false
+os:
+  editCommand: '' # see EditCommand section
+  openCommand: # see OpenCommand section
 refresher:
   refreshInterval: 10 # file/submodule refresh interval in seconds
   fetchInterval: 60 # re-fetch interval in seconds
@@ -214,6 +217,21 @@ os:
   openCommand: 'open {{filename}}'
 ```
 
+### EditCommand
+Lazygit will run edit with the first non-empty command:
+1. config.yaml
+```yaml
+os:
+  editCommand:
+```
+2. $(git config core.editor)
+3. $GIT_EDITOR
+4. $VISUAL
+5. $EDITOR
+6. vi (if found through `which vi`)
+
+Lazygit will log an error if none of these commands are non-empty.
+
 ### Recommended Config Values
 
 for users of VSCode

pkg/commands/files.go

@@ -339,7 +339,7 @@ func (c *GitCommand) EditFileCmdStr(filename string) (string, error) {
 		}
 	}
 	if editor == "" {
-		return "", errors.New("No editor defined in $GIT_EDITOR, $VISUAL, $EDITOR, or git config")
+		return "", errors.New("No editor defined in config file, $GIT_EDITOR, $VISUAL, $EDITOR, or git config")
 	}
 
 	return fmt.Sprintf("%s %s", editor, c.OSCommand.Quote(filename)), nil