From 27ee3f07c39f3f584fac4a8712dd4fe97e46e462 Mon Sep 17 00:00:00 2001
From: Jonas Maier <>
Date: Tue, 10 Mar 2026 16:51:07 +0100
Subject: command completion (only builtins and user-defined funs for now)

---
 src/completion.rs | 19 +++++++++++++++++++
 src/main.rs       |  4 +++-
 2 files changed, 22 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/completion.rs b/src/completion.rs
index 61dce76..2137b6f 100644
--- a/src/completion.rs
+++ b/src/completion.rs
@@ -79,3 +79,22 @@ pub fn variable_completion(session: Arc<Mutex<Session>>, prefix: BString) -> Vec
     }
     out
 }
+
+pub fn command_completion(session: Arc<Mutex<Session>>, prefix: BString) -> Vec<Suggestion> {
+    let se = session.lock().unwrap();
+    let mut out = Vec::new();
+    for fun in se.funs.keys().chain(se.builtins.keys()) {
+        if fun.starts_with(&prefix) {
+            out.push(Suggestion {
+                display: fun.to_vec(),
+                delta: fun[prefix.len()..].to_vec(),
+            })
+        }
+    }
+
+    for s in out.iter_mut() {
+        s.delta.push(b' ');
+    }
+
+    out
+}
diff --git a/src/main.rs b/src/main.rs
index 6012a86..5e7d40a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -357,7 +357,9 @@ fn event_loop() {
                 );
 
                 let suggestions = match comp.kind {
-                    parse::CompletionKind::Command => todo!(),
+                    parse::CompletionKind::Command => {
+                        completion::command_completion(session.clone(), comp.partial)
+                    }
                     parse::CompletionKind::Argument => completion::path_completion(comp.partial),
                     parse::CompletionKind::Variable => {
                         completion::variable_completion(session.clone(), comp.partial)
-- 
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