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-;;; docker-tramp.el --- TRAMP integration for docker containers  -*- lexical-binding: t; -*-
-
-;; Copyright (C) 2015 Mario Rodas <marsam@users.noreply.github.com>
-
-;; Author: Mario Rodas <marsam@users.noreply.github.com>
-;; URL: https://github.com/emacs-pe/docker-tramp.el
-;; Keywords: docker, convenience
-;; Version: 0.1
-;; Package-Requires: ((emacs "24") (cl-lib "0.5"))
-
-;; This file is NOT part of GNU Emacs.
-
-;;; License:
-
-;; This program is free software; you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation, either version 3 of the License, or
-;; (at your option) any later version.
-
-;; This program is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;; GNU General Public License for more details.
-
-;; You should have received a copy of the GNU General Public License
-;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-;;; Commentary:
-;;
-;; `docker-tramp.el' offers a TRAMP method for Docker containers.
-;;
-;; > **NOTE**: `docker-tramp.el' relies in the `docker exec` command.  Tested
-;; > with docker version 1.6.x but should work with versions >1.3
-;;
-;; ## Usage
-;;
-;; Offers the TRAMP method `docker` to access running containers
-;;
-;;     C-x C-f /docker:user@container:/path/to/file
-;;
-;;     where
-;;       user           is the user that you want to use (optional)
-;;       container      is the id or name of the container
-;;
-;; ## Troubleshooting
-;;
-;; ### Tramp hangs on Alpine container
-;;
-;; Busyboxes built with the `ENABLE_FEATURE_EDITING_ASK_TERMINAL' config option
-;; send also escape sequences, which `tramp-wait-for-output' doesn't ignores
-;; correctly.  Tramp upstream fixed in [98a5112][] and is available since
-;; Tramp>=2.3.
-;;
-;; For older versions of Tramp you can dump [docker-tramp-compat.el][] in your
-;; `load-path' somewhere and add the following to your `init.el', which
-;; overwrites `tramp-wait-for-output' with the patch applied:
-;;
-;;     (require 'docker-tramp-compat)
-;;
-;; [98a5112]: http://git.savannah.gnu.org/cgit/tramp.git/commit/?id=98a511248a9405848ed44de48a565b0b725af82c
-;; [docker-tramp-compat.el]: https://github.com/emacs-pe/docker-tramp.el/raw/master/docker-tramp-compat.el
-
-;;; Code:
-(eval-when-compile (require 'cl-lib))
-
-(require 'tramp)
-(require 'tramp-cache)
-
-(defgroup docker-tramp nil
-  "TRAMP integration for Docker containers."
-  :prefix "docker-tramp-"
-  :group 'applications
-  :link '(url-link :tag "Github" "https://github.com/emacs-pe/docker-tramp.el")
-  :link '(emacs-commentary-link :tag "Commentary" "docker-tramp"))
-
-(defcustom docker-tramp-docker-executable "docker"
-  "Path to docker executable."
-  :type 'string
-  :group 'docker-tramp)
-
-;;;###autoload
-(defcustom docker-tramp-docker-options nil
-  "List of docker options."
-  :type '(repeat string)
-  :group 'docker-tramp)
-
-(defcustom docker-tramp-use-names nil
-  "Whether use names instead of id."
-  :type 'boolean
-  :group 'docker-tramp)
-
-;;;###autoload
-(defconst docker-tramp-completion-function-alist
-  '((docker-tramp--parse-running-containers  ""))
-  "Default list of (FUNCTION FILE) pairs to be examined for docker method.")
-
-;;;###autoload
-(defconst docker-tramp-method "docker"
-  "Method to connect docker containers.")
-
-(defun docker-tramp--running-containers ()
-  "Collect docker running containers.
-
-Return a list of containers of the form: \(ID NAME\)"
-  (cl-loop for line in (cdr (ignore-errors (apply #'process-lines docker-tramp-docker-executable (append docker-tramp-docker-options (list "ps")))))
-           for info = (split-string line "[[:space:]]+" t)
-           collect (cons (car info) (last info))))
-
-(defun docker-tramp--parse-running-containers (&optional ignored)
-  "Return a list of (user host) tuples.
-
-TRAMP calls this function with a filename which is IGNORED.  The
-user is an empty string because the docker TRAMP method uses bash
-to connect to the default user containers."
-  (cl-loop for (id name) in (docker-tramp--running-containers)
-           collect (list "" (if docker-tramp-use-names name id))))
-
-;;;###autoload
-(defun docker-tramp-cleanup ()
-  "Cleanup TRAMP cache for docker method."
-  (interactive)
-  (let ((containers (apply 'append (docker-tramp--running-containers))))
-    (maphash (lambda (key _)
-               (and (vectorp key)
-                    (string-equal docker-tramp-method (tramp-file-name-method key))
-                    (not (member (tramp-file-name-host key) containers))
-                    (remhash key tramp-cache-data)))
-             tramp-cache-data))
-  (setq tramp-cache-data-changed t)
-  (if (zerop (hash-table-count tramp-cache-data))
-      (ignore-errors (delete-file tramp-persistency-file-name))
-    (tramp-dump-connection-properties)))
-
-;;;###autoload
-(defun docker-tramp-add-method ()
-  "Add docker tramp method."
-  (add-to-list 'tramp-methods
-               `(,docker-tramp-method
-                 (tramp-login-program      ,docker-tramp-docker-executable)
-                 (tramp-login-args         (,docker-tramp-docker-options ("exec" "-it") ("-u" "%u") ("%h") ("sh")))
-                 (tramp-remote-shell       "/bin/sh")
-                 (tramp-remote-shell-args  ("-i" "-c")))))
-
-;;;###autoload
-(eval-after-load 'tramp
-  '(progn
-     (docker-tramp-add-method)
-     (tramp-set-completion-function docker-tramp-method docker-tramp-completion-function-alist)))
-
-(provide 'docker-tramp)
-
-;; Local Variables:
-;; indent-tabs-mode: nil
-;; End:
-
-;;; docker-tramp.el ends here