From 7c2fb92c9170ff108bef244e7aed82e29156ae5c Mon Sep 17 00:00:00 2001
From: Nathan Vegdahl
Date: Mon, 14 Jun 2021 19:43:24 -0700
Subject: Report indent style when calling indent-style with no arguments.

Also print an error message when the argument is malformed.
---
 helix-term/src/commands.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/helix-term/src/commands.rs b/helix-term/src/commands.rs
index fb254432..0f2a29c6 100644
--- a/helix-term/src/commands.rs
+++ b/helix-term/src/commands.rs
@@ -982,6 +982,19 @@ mod cmd {
     fn set_indent_style(editor: &mut Editor, args: &[&str], event: PromptEvent) {
         use IndentStyle::*;
 
+        // If no argument, report current indent style.
+        if args.is_empty() {
+            let style = editor.current().1.indent_style;
+            editor.set_status(match style {
+                Tabs => "tabs".into(),
+                Spaces(1) => "1 space".into(),
+                Spaces(n) if (2..=8).contains(&n) => format!("{} spaces", n),
+                _ => "error".into(), // Shouldn't happen.
+            });
+            return;
+        }
+
+        // Attempt to parse argument as an indent style.
         let style = match args.get(0) {
             Some(arg) if "tabs".starts_with(&arg.to_lowercase()) => Some(Tabs),
             Some(&"0") => Some(Tabs),
@@ -996,6 +1009,9 @@ mod cmd {
         if let Some(s) = style {
             let (_, doc) = editor.current();
             doc.indent_style = s;
+        } else {
+            // Invalid argument.
+            editor.set_error(format!("invalid indent style '{}'", args[0],));
         }
     }
 
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