88 lines
3.2 KiB
EmacsLisp
88 lines
3.2 KiB
EmacsLisp
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;;; docker-tramp-compat.el --- TRAMP integration for docker containers -*- lexical-binding: t; -*-
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;; Copyright (C) 2015 Mario Rodas <marsam@users.noreply.github.com>
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;; Author: Mario Rodas <marsam@users.noreply.github.com>
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;; URL: https://github.com/emacs-pe/docker-tramp.el
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;; Keywords: docker, convenience
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;; Version: 0.1
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;; Package-Requires: ((emacs "24"))
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;; This file is NOT part of GNU Emacs.
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;;; License:
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(require 'tramp-sh)
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(when (version< tramp-version "2.3")
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;; Overwrite `tramp-wait-for-output' to work with Alpine busy boxes in Tramp<2.3
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;;
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;; See:
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;; + https://lists.gnu.org/archive/html/tramp-devel/2016-05/msg00000.html
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;; + http://git.savannah.gnu.org/cgit/tramp.git/commit/?id=98a511248a9405848ed44de48a565b0b725af82c
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(defconst tramp-device-escape-sequence-regexp "\e[[0-9]+n"
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"Terminal control escape sequences for device status.")
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(defun tramp-wait-for-output (proc &optional timeout)
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"Wait for output from remote command."
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(unless (buffer-live-p (process-buffer proc))
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(delete-process proc)
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(tramp-error proc 'file-error "Process `%s' not available, try again" proc))
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(with-current-buffer (process-buffer proc)
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(let* (;; Initially, `tramp-end-of-output' is "#$ ". There might
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;; be leading escape sequences, which must be ignored.
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;; Busyboxes built with the EDITING_ASK_TERMINAL config
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;; option send also escape sequences, which must be
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;; ignored.
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(regexp (format "[^#$\n]*%s\\(%s\\)?\r?$"
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(regexp-quote tramp-end-of-output)
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tramp-device-escape-sequence-regexp))
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;; Sometimes, the commands do not return a newline but a
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;; null byte before the shell prompt, for example "git
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;; ls-files -c -z ...".
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(regexp1 (format "\\(^\\|\000\\)%s" regexp))
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(found (tramp-wait-for-regexp proc timeout regexp1)))
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(if found
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(let (buffer-read-only)
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;; A simple-minded busybox has sent " ^H" sequences.
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;; Delete them.
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(goto-char (point-min))
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(when (re-search-forward "^\\(.\b\\)+$" (point-at-eol) t)
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(forward-line 1)
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(delete-region (point-min) (point)))
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;; Delete the prompt.
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(goto-char (point-max))
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(re-search-backward regexp nil t)
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(delete-region (point) (point-max)))
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(if timeout
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(tramp-error
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proc 'file-error
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"[[Remote prompt `%s' not found in %d secs]]"
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tramp-end-of-output timeout)
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(tramp-error
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proc 'file-error
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"[[Remote prompt `%s' not found]]" tramp-end-of-output)))
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;; Return value is whether end-of-output sentinel was found.
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found)))
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)
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(provide 'docker-tramp-compat)
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;;; docker-tramp-compat.el ends here
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