Don't try to make a pipe process for remote processes in Eshell

Tramp currently isn't able to handle this, so the result will just
produce an error (bug#61024).

* lisp/eshell/esh-proc.el (eshell-gather-process-output): Check for a
remote 'default-directory' before trying to make a pipe process.

* test/lisp/eshell/esh-proc-tests.el
(esh-var-test/output/remote-redirect): New test.

1 files changed, 13 insertions, 0 deletions

diff --git a/test/lisp/eshell/esh-proc-tests.el b/test/lisp/eshell/esh-proc-tests.el
index ae7b1dddd69..8e02fbb5497 100644
--- a/test/lisp/eshell/esh-proc-tests.el
+++ b/test/lisp/eshell/esh-proc-tests.el
@@ -19,6 +19,7 @@
 
 ;;; Code:
 
+(require 'tramp)
 (require 'ert)
 (require 'esh-mode)
 (require 'eshell)
@@ -85,6 +86,18 @@
       "\\`\\'"))
     (should (equal (buffer-string) "stdout\nstderr\n"))))
 
+(ert-deftest esh-var-test/output/remote-redirect ()
+  "Check that redirecting stdout for a remote process works."
+  (skip-unless (and (eshell-tests-remote-accessible-p)
+                    (executable-find "echo")))
+  (let ((default-directory ert-remote-temporary-file-directory))
+    (eshell-with-temp-buffer bufname "old"
+      (with-temp-eshell
+       (eshell-match-command-output
+        (format "*echo hello > #<%s>" bufname)
+        "\\`\\'"))
+      (should (equal (buffer-string) "hello\n")))))
+
 
 ;; Exit status