From ef02b82a048d8a63c40d0229fdc0dc878263cd9f Mon Sep 17 00:00:00 2001
From: Nicolas Olivier <nico@kingtong.org>
Date: Sat, 6 Mar 2021 23:03:03 -0500
Subject: [PATCH] Return error on no matching context

---
 src/cmd/exec.rs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/cmd/exec.rs b/src/cmd/exec.rs
index b732d1f6..8eb66e2c 100644
--- a/src/cmd/exec.rs
+++ b/src/cmd/exec.rs
@@ -1,7 +1,7 @@
 use std::process::Command;
 use std::thread;
 
-use anyhow::Result;
+use anyhow::{anyhow, Result};
 use signal_hook::iterator::Signals;
 
 use crate::kubeconfig::{self, KubeConfig};
@@ -64,8 +64,13 @@ pub fn exec(
     }
 
     let installed = kubeconfig::get_installed_contexts(settings)?;
+    let matching = installed.get_contexts_matching(&context_name);
 
-    for context_src in installed.get_contexts_matching(&context_name) {
+    if matching.len() == 0 {
+        return Err(anyhow!("No context matching {}", context_name));
+    }
+
+    for context_src in matching {
         let kubeconfig = installed.make_kubeconfig_for_context(&context_src.item.name, Some(&namespace_name))?;
         let return_code = run_in_context(&kubeconfig, &args)?;