Add sucmd to customize "sudo" command

Fixes #833

cmd/micro/autocomplete.go

@@ -181,6 +181,13 @@ func OptionValueComplete(inputOpt, input string) (string, []string) {
 			if strings.HasPrefix("dos", input) {
 				suggestions = append(suggestions, "dos")
 			}
+		case "sucmd":
+			if strings.HasPrefix("sudo", input) {
+				suggestions = append(suggestions, "sudo")
+			}
+			if strings.HasPrefix("doas", input) {
+				suggestions = append(suggestions, "doas")
+			}
 		}
 	}
 

cmd/micro/buffer.go

@@ -431,7 +431,7 @@ func (b *Buffer) SaveAsWithSudo(filename string) error {
 	screen = nil
 
 	// Set up everything for the command
-	cmd := exec.Command("sudo", "tee", filename)
+	cmd := exec.Command(b.Settings["sucmd"].(string), "tee", filename)
 	cmd.Stdin = bytes.NewBufferString(b.SaveString(b.Settings["fileformat"] == "dos"))
 
 	// This is a trap for Ctrl-C so that it doesn't kill micro

cmd/micro/settings.go

@@ -215,6 +215,7 @@ func DefaultGlobalSettings() map[string]interface{} {
 		"splitRight":     true,
 		"splitBottom":    true,
 		"statusline":     true,
+		"sucmd":          "sudo",
 		"syntax":         true,
 		"tabmovement":    false,
 		"tabsize":        float64(4),

runtime/help/options.md

@@ -177,6 +177,11 @@ Here are the options that you can set:
 
     default value: `on`
 
+* `sucmd`: specifies the super user command. On most systems this is "sudo" but on BSD it can be "doas." This
+   option can be customized and is only used when saving with su.
+
+    default value: `sudo`
+
 ---
 
 Default plugin options: