Improve alignment when printing sites

2 files changed, 12 insertions, 3 deletions

diff --git a/TODO.md b/TODO.md
index 380dea0..d3c904b 100644
--- a/TODO.md
+++ b/TODO.md
@@ -5,7 +5,7 @@
 0. Implement --update-sites command
 3. Parse markdown (`pulldown_cmark`)
 4. Maybe default --validate-sites off (parsing 30k file a big hit)
-5. Print to stderr in style
+5. Print to stderr in [style](https://github.com/BurntSushi/termcolor)
 
 ### resources for later
 0. [Intro to async rust](http://jamesmcm.github.io/blog/2020/05/06/a-practical-introduction-to-async-programming-in-rust/)
diff --git a/src/main.rs b/src/main.rs
index d5568cf..e9f0d99 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -17,8 +17,17 @@ fn main() {
     }
 
     if opts.list_sites {
-        for s in ls.sites() {
-            println!("{}: {}", s.api_site_parameter, s.site_url);
+        let sites = ls.sites();
+        match sites.into_iter().map(|s| s.api_site_parameter.len()).max() {
+            Some(max_w) => {
+                for s in ls.sites() {
+                    println!("{:>w$}: {}", s.api_site_parameter, s.site_url, w = max_w);
+                }
+            }
+            None => {
+                // TODO stderr
+                println!("The site list is empty. Try running `so --update-sites`.");
+            }
         }
         return;
     }