From 3270aa106b583aa1a36bd74c745c557a83fb39c6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=99=BE=E5=9C=B0=20=E5=B8=8C=E7=95=99=E8=80=B6?=
 <65301509+KiruyaMomochi@users.noreply.github.com>
Date: Thu, 10 Mar 2022 02:07:07 +0900
Subject: [PATCH] Hide package repository count when redirecting stdout
 (#29402)

---
 lib/spack/spack/cmd/repo.py | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/lib/spack/spack/cmd/repo.py b/lib/spack/spack/cmd/repo.py
index a2e1d84e93..5fd6ba463e 100644
--- a/lib/spack/spack/cmd/repo.py
+++ b/lib/spack/spack/cmd/repo.py
@@ -6,6 +6,7 @@
 from __future__ import print_function
 
 import os
+import sys
 
 import llnl.util.tty as tty
 
@@ -142,9 +143,10 @@ def repo_list(args):
         except spack.repo.RepoError:
             continue
 
-    msg = "%d package repositor" % len(repos)
-    msg += "y." if len(repos) == 1 else "ies."
-    tty.msg(msg)
+    if sys.stdout.isatty():
+        msg = "%d package repositor" % len(repos)
+        msg += "y." if len(repos) == 1 else "ies."
+        tty.msg(msg)
 
     if not repos:
         return