emacs: wrap make-process

Provide a safe working directory.

emacs/notmuch-crypto.el

@@ -224,7 +224,7 @@ corresponding key when the status button is pressed."
 	  (with-current-buffer buffer
 	    (goto-char (point-max))
 	    (insert (format "--- Retrieving key %s:\n" keyid)))
-	  (let ((p (make-process
+	  (let ((p (notmuch--make-process
 		    :name "notmuch GPG key retrieval"
 		    :connection-type 'pipe
 		    :buffer buffer

emacs/notmuch-lib.el

@@ -869,6 +869,11 @@ You may need to restart Emacs or upgrade your notmuch package."))
 default"
   (notmuch--apply-with-env #'process-lines program args))
 
+(defun notmuch--make-process (&rest args)
+  "Wrap make-process, binding DEFAULT-DIRECTORY to a safe
+default"
+  (notmuch--apply-with-env #'make-process args))
+
 (defun notmuch--call-process-region (start end program
 					   &optional delete buffer display
 					   &rest args)
@@ -950,7 +955,7 @@ status."
   (let* ((command (or (executable-find notmuch-command)
 		      (error "Command not found: %s" notmuch-command)))
 	 (err-buffer (generate-new-buffer " *notmuch-stderr*"))
-	 (proc (make-process
+	 (proc (notmuch--make-process
 		:name name
 		:buffer buffer
 		:command (cons command args)

test/T310-emacs.sh

@@ -1169,7 +1169,6 @@ EOF
 test_expect_equal_file EXPECTED OUTPUT
 
 test_begin_subtest "notmuch-search with nonexistent CWD"
-test_subtest_known_broken
 test_emacs '(test-log-error
 	      (let ((default-directory "/nonexistent"))
 	        (notmuch-search "*")))'