module: add :emacs tramp

modules/emacs/tramp/config.el

@@ -0,0 +1,50 @@
+;;; emacs/tramp/config.el -*- lexical-binding: t; -*-
+
+;; Prefix tramp autosaves to prevent conflicts with local ones
+(cl-pushnew (list "\\`/[^/]*:\\([^/]*/\\)*\\([^/]*\\)\\'"
+                  (concat auto-save-list-file-prefix "tramp-\\2") t)
+            auto-save-file-name-transforms
+            :test #'equal)
+
+
+(after! tramp
+  (setq remote-file-name-inhibit-cache 60
+        remote-file-name-inhibit-locks t
+        tramp-copy-size-limit (* 1024 1024) ; 1mb
+        tramp-use-scp-direct-remote-copying t
+        tramp-completion-reread-directory-timeout 60
+        tramp-backup-directory-alist backup-directory-alist
+        tramp-auto-save-directory  (concat doom-cache-dir "tramp-autosave/"))
+
+  ;; the ssh method is faster tha nthe default ssh on Windows
+  (unless (featurep :system 'windows)
+    (setq tramp-default-method "ssh")))
+
+
+;; PERF: When creating a new process in Emacs, you have two options: synchronous
+;;   or asynchronous. Async processes have historically been really slow over
+;;   TRAMP, because it has to create a new connection for every async process.
+;;   However recent version of TRAMP have added a feature called direct async
+;;   process that makes this significantly faster. This feature alone will take
+;;   many packages (like magit or git-gutter) from completely unusable to
+;;   bearable over TRAMP. Here is how you configure it with TRAMP 2.7.
+(connection-local-set-profile-variables
+ 'remote-direct-async-process
+ '((tramp-direct-async-process . t)))
+
+(connection-local-set-profiles
+ `(:application tramp :protocol "scp")
+ 'remote-direct-async-process)
+
+
+;; See magit/magit#5220
+(after! magit
+  (setq magit-tramp-pipe-stty-setings 'pty))
+
+
+;; PERF: Newer versions of TRAMP will use SSH connection sharing for much faster
+;;   connections. These don’t require you to reenter your password each time you
+;;   connect. The compile command disables this feature, so we want to turn it
+;;   back on.
+(after! (tramp compile)
+  (remove-hook 'compilation-mode-hook #'tramp-compile-disable-ssh-controlmaster-options))