From 1387f030e68ecfe96c1ce7ed6bcc35a81c6df434 Mon Sep 17 00:00:00 2001 From: Brian Cully Date: Fri, 16 Sep 2022 15:05:33 -0400 Subject: Docker support for Tramp. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Slightly modified copy of ‘tramp-nspawn’. --- COPYING | 674 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Makefile | 13 ++ README.org | 28 +++ tramp-docker.el | 128 +++++++++++ 4 files changed, 843 insertions(+) create mode 100644 COPYING create mode 100644 Makefile create mode 100644 README.org create mode 100644 tramp-docker.el diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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But first, please read +. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..6273409 --- /dev/null +++ b/Makefile @@ -0,0 +1,13 @@ +EMACS?= emacs + +ELCS= tramp-docker.elc + +.PHONY: all clean + +all: $(ELCS) + +clean: + rm -f $(ELCS) + +%.elc: %.el + $(EMACS) -Q --batch -f batch-byte-compile $< diff --git a/README.org b/README.org new file mode 100644 index 0000000..f9a4988 --- /dev/null +++ b/README.org @@ -0,0 +1,28 @@ +* Introduction +=tramp-docker= adds support for =Docker= containers with Emacs’ +Tramp system. + +* Installation +** ELPA +This package is available on [[https://elpa.gnu.org/packages/nspawn-tramp.html][GNU ELPA]] and can be installed with +=M-x package-install RET tramp-docker RET= from within Emacs itself. + +** Direct download +Download this repository to some location, then add the following to +your Emacs initialization: +#+begin_src elisp + (add-to-list 'load-path "/path/to/tramp-docker") + (require 'tramp-docker) +#+end_src + +* Usage +Call ~tramp-docker-setup~ to add support: +#+begin_src elisp + (add-hook 'after-init-hook 'tramp-docker-setup) +#+end_src + + +Use Tramp as normal to access files on a container: +#+begin_example + C-x C-f /docker:user@container:/path/to/file +#+end_example diff --git a/tramp-docker.el b/tramp-docker.el new file mode 100644 index 0000000..8ae9840 --- /dev/null +++ b/tramp-docker.el @@ -0,0 +1,128 @@ +;;; tramp-docker.el --- Tramp integration for Docker containers -*- lexical-binding: t; -*- + +;; Copyright © 2022 Free Software Foundation, Inc. + +;; Author: Brian Cully +;; Maintainer: Brian Cully +;; URL: https://git.spork.org/tramp-docker +;; Keywords: tramp, docker +;; Version: 1.0 +;; Package-Requires: ((emacs "23")) + +;;; 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 . + +;;; Commentary: + +;; +;; ‘tramp-docker’ allows Tramp access to environments provided by +;; Docker. +;; +;; ## Usage +;; +;; Call ‘tramp-docker-setup’ in your Emacs initialization. +;; +;; (add-hook 'after-init-hook 'tramp-docker-setup) +;; +;; Open a file on a running systemd-docker container: +;; +;; C-x C-f /docker:USER@CONTAINER:/path/to/file +;; +;; Where: +;; USER is the user on the container to connect as (optional) +;; CONTAINER is the container to connect to +;; + +;;; Code: + +(require 'tramp) + +(defgroup tramp-docker nil + "Tramp integration for Docker containers." + :prefix "tramp-docker-" + :group 'applications + :link '(url-link :tag "Github" "https://git.spork.org/tramp-docker") + :link '(emacs-commentary-link :tag "Commentary" "tramp-docker")) + +(defcustom tramp-docker-program "docker" + "Name of the Docker client program." + :type 'string + :group 'tramp-docker) + +(defconst tramp-docker-method "docker" + "Tramp method name to use to connect to Docker containers.") + +(defun tramp-docker--completion-function (&rest _args) + "List Docker containers available for connection. + +This function is used by ‘tramp-set-completion-function’, please +see its function help for a description of the format." + (message "cf: %s" _args) + (let* ((raw-list (shell-command-to-string + (concat tramp-docker-program + " ps --format '{{.ID}}\t{{.Names}}'"))) + (lines (split-string raw-list "\n")) + (names (mapcar (lambda (line) + (let ((words (split-string line "\t"))) + (or (nth 1 words) (nth 0 words)))) + lines)) + (machines (seq-take-while (lambda (name) name) names))) + (message "rli: %s" raw-list) + (message "lns: %s" lines) + (message "ia: %s" names) + (message "ma: %s" machines) + (mapcar (lambda (m) (list nil m)) machines))) + +;; todo: check tramp-async-args and tramp-direct-async +(defun tramp-docker--add-method () + "Add Tramp method handler for Docker containers." + (push `(,tramp-docker-method + (tramp-login-program ,tramp-docker-program) + (tramp-login-args (("exec") + ("-it") + ;("--uid" "%u") + ("%h") + ("/bin/sh"))) + (tramp-remote-shell "/bin/sh") + (tramp-remote-shell-login ("-l")) + (tramp-remote-shell-args ("-i" "-c"))) + tramp-methods)) + +(defun tramp-docker--remove-method () + "Remove Tramp method handler for docker containers." + (setf (alist-get tramp-docker-method tramp-methods nil t 'string=) nil)) + +(defun tramp-docker-unload-function () + "Remove Tramp method handler and completion functions." + (tramp-set-completion-function tramp-docker-method nil) + (tramp-docker--remove-method) + nil) + +(when nil + (load-file (buffer-file-name)) + (setq tramp-docker-program "doas podman") + (setq tramp-verbose 7) ;; default 3 + (tramp-docker-setup) + (tramp-docker-unload-function)) + +;;;###autoload +(defun tramp-docker-setup () + "Initialize Docker support for Tramp." + (tramp-docker--add-method) + (tramp-set-completion-function tramp-docker-method + '((tramp-docker--completion-function "")))) + +(provide 'tramp-docker) +;;; tramp-docker.el ends here -- cgit v1.2.3