├── LICENSE
├── README.md
└── better-shell.el
/LICENSE:
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586 | author or copyright holder as a result of your choosing to follow a
587 | later version.
588 |
589 | 15. Disclaimer of Warranty.
590 |
591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
599 |
600 | 16. Limitation of Liability.
601 |
602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
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607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
610 | SUCH DAMAGES.
611 |
612 | 17. Interpretation of Sections 15 and 16.
613 |
614 | If the disclaimer of warranty and limitation of liability provided
615 | above cannot be given local legal effect according to their terms,
616 | reviewing courts shall apply local law that most closely approximates
617 | an absolute waiver of all civil liability in connection with the
618 | Program, unless a warranty or assumption of liability accompanies a
619 | copy of the Program in return for a fee.
620 |
621 | END OF TERMS AND CONDITIONS
622 |
623 | How to Apply These Terms to Your New Programs
624 |
625 | If you develop a new program, and you want it to be of the greatest
626 | possible use to the public, the best way to achieve this is to make it
627 | free software which everyone can redistribute and change under these terms.
628 |
629 | To do so, attach the following notices to the program. It is safest
630 | to attach them to the start of each source file to most effectively
631 | state the exclusion of warranty; and each file should have at least
632 | the "copyright" line and a pointer to where the full notice is found.
633 |
634 | {one line to give the program's name and a brief idea of what it does.}
635 | Copyright (C) {year} {name of author}
636 |
637 | This program is free software: you can redistribute it and/or modify
638 | it under the terms of the GNU General Public License as published by
639 | the Free Software Foundation, either version 3 of the License, or
640 | (at your option) any later version.
641 |
642 | This program is distributed in the hope that it will be useful,
643 | but WITHOUT ANY WARRANTY; without even the implied warranty of
644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
645 | GNU General Public License for more details.
646 |
647 | You should have received a copy of the GNU General Public License
648 | along with this program. If not, see .
649 |
650 | Also add information on how to contact you by electronic and paper mail.
651 |
652 | If the program does terminal interaction, make it output a short
653 | notice like this when it starts in an interactive mode:
654 |
655 | {project} Copyright (C) {year} {fullname}
656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657 | This is free software, and you are welcome to redistribute it
658 | under certain conditions; type `show c' for details.
659 |
660 | The hypothetical commands `show w' and `show c' should show the appropriate
661 | parts of the General Public License. Of course, your program's commands
662 | might be different; for a GUI interface, you would use an "about box".
663 |
664 | You should also get your employer (if you work as a programmer) or school,
665 | if any, to sign a "copyright disclaimer" for the program, if necessary.
666 | For more information on this, and how to apply and follow the GNU GPL, see
667 | .
668 |
669 | The GNU General Public License does not permit incorporating your program
670 | into proprietary programs. If your program is a subroutine library, you
671 | may consider it more useful to permit linking proprietary applications with
672 | the library. If this is what you want to do, use the GNU Lesser General
673 | Public License instead of this License. But first, please read
674 | .
675 |
676 |
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/README.md:
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1 | better-shell
2 | =================
3 |
4 | This package simplifies shell management and sudo access by providing
5 | the following commands.
6 |
7 | `better-shell-shell`
8 | --------------------
9 |
10 | Cycle through existing shell buffers, in order of recent use. If
11 | there are no shells, one is created.
12 |
13 | With C-u prefix arg, invoke `better-shell-for-current-dir`.
14 |
15 | `better-shell-for-current-dir`
16 | ------------------------------
17 |
18 | Bring up a shell on the same host and in the same directory as the
19 | current buffer, choosing an existing shell if possible. The shell
20 | chosen is guaranteed to be idle (not currently running a command). It
21 | first looks for an idle shell that is already in the buffer's
22 | directory. If none is found, it looks for another idle shell on the
23 | same host as the buffer. If one is found, that shell is selected and
24 | automatically placed into the buffer's directory with a `cd` command.
25 | Otherwise, a new shell is created on the same host and in the same
26 | directory as the buffer.
27 |
28 | `better-shell-remote-open`
29 | --------------------------
30 |
31 | Open a shell on a remote server, allowing you to choose from any host
32 | you've previously logged into (uses your ~/.ssh/known_hosts file) or
33 | enter a new host. With C-u prefix arg, get sudo shell.
34 |
35 | `better-shell-sudo-here`
36 | --------------------------
37 |
38 | Reopen the current file, directory, or shell as root.
39 |
40 | `better-shell-for-projectile-root`
41 | ------------------------------
42 |
43 | Like `better-shell-for-current-dir`, except you are taken to the
44 | projectile root of the current directory, provided you have projectile
45 | installed.
46 |
47 | Installation
48 | ------------
49 |
50 | ### Melpa Installation
51 |
52 | [](https://melpa.org/#/better-shell)
53 |
54 | M-x package-install RET better-shell RET
55 |
56 | Then add key bindings to your config, for example:
57 | ```lisp
58 | (global-set-key (kbd "C-'") 'better-shell-shell)
59 | (global-set-key (kbd "C-;") 'better-shell-remote-open)
60 | ```
61 |
62 | ### `use-package` Installation
63 | ```lisp
64 | (use-package better-shell
65 | :ensure t
66 | :bind (("C-'" . better-shell-shell)
67 | ("C-;" . better-shell-remote-open)))
68 | ```
69 |
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/better-shell.el:
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1 | ;;; better-shell.el --- Better shell management
2 | ;; Copyright (C) 2016 Russell Black
3 |
4 | ;; Author: Russell Black (killdash9@github)
5 | ;; Keywords: convenience
6 | ;; URL: https://github.com/killdash9/better-shell
7 | ;; Created: 1st Mar 2016
8 | ;; Version: 1.2.1
9 | ;; Package-Requires: ((emacs "24.4"))
10 |
11 | ;; This program is free software; you can redistribute it and/or modify
12 | ;; it under the terms of the GNU General Public License as published by
13 | ;; the Free Software Foundation, either version 3 of the License, or
14 | ;; (at your option) any later version.
15 |
16 | ;; This program is distributed in the hope that it will be useful,
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 | ;; GNU General Public License for more details.
20 |
21 | ;; You should have received a copy of the GNU General Public License
22 | ;; along with this program. If not, see .
23 |
24 | ;;; Commentary:
25 | ;;
26 | ;; This package simplifies shell management and sudo access by providing
27 | ;; the following commands.
28 | ;;
29 | ;; `better-shell-shell'
30 | ;; --------------------
31 | ;;
32 | ;; Cycle through existing shell buffers, in order of recent use. If
33 | ;; there are no shells, one is created.
34 | ;;
35 | ;; With C-u prefix arg, invoke `better-shell-for-current-dir'.
36 | ;;
37 | ;; `better-shell-for-current-dir'
38 | ;; ------------------------------
39 | ;;
40 | ;; Bring up a shell on the same host and in the same directory as the
41 | ;; current buffer, choosing an existing shell if possible. The shell
42 | ;; chosen is guaranteed to be idle (not currently running a command). It
43 | ;; first looks for an idle shell that is already in the buffer's
44 | ;; directory. If none is found, it looks for another idle shell on the
45 | ;; same host as the buffer. If one is found, that shell is selected and
46 | ;; automatically placed into the buffer's directory with a `cd` command.
47 | ;; Otherwise, a new shell is created on the same host and in the same
48 | ;; directory as the buffer.
49 | ;;
50 | ;; `better-shell-remote-open'
51 | ;; --------------------------
52 | ;;
53 | ;; Open a shell on a remote server, allowing you to choose from any host
54 | ;; you've previously logged into (uses your ~/.ssh/known_hosts file) or
55 | ;; enter a new host. With C-u prefix arg, get sudo shell.
56 | ;;
57 | ;; `better-shell-sudo-here'
58 | ;; --------------------------
59 | ;;
60 | ;; Reopen the current file, directory, or shell as root.
61 |
62 | ;;; Code:
63 | (require 'cl-lib)
64 | (require 'tramp)
65 | (require 'shell)
66 |
67 | (defun better-shell-idle-p (buf)
68 | "Return t if the shell in BUF is not running something.
69 | When available, use process hierarchy information via pstree for
70 | local shells. Otherwise, we ask comint if the point is after a
71 | prompt."
72 | (with-current-buffer buf
73 | (let ((comint-says-idle (and
74 | (> (point) 1) ;; if point > 1
75 | ;; see if previous char has the prompt face
76 | (equal '(comint-highlight-prompt)
77 | (get-text-property
78 | (- (point) 1) 'font-lock-face)))))
79 | (if (file-remote-p default-directory)
80 | ;; for remote shells we have to rely on comint
81 | comint-says-idle
82 | ;; for local shells, we can potentially do better using pgrep
83 | (condition-case nil
84 | (case (call-process ;; look at the exit code of pgrep -P
85 | "pgrep" nil nil nil "-P"
86 | (number-to-string (process-id (get-buffer-process buf))))
87 | (0 nil) ;; child procxesses found, not idle
88 | (1 t) ;; not running any child processes, it's idle
89 | (t comint-says-idle)) ;; anything else, fall back on comint.
90 | (error comint-says-idle)))))) ;; comint fallback if execution failed
91 |
92 | (defun better-shell-shells ()
93 | "Return a list of buffers running shells."
94 | (cl-remove-if-not
95 | (lambda (buf)
96 | (and
97 | (get-buffer-process buf)
98 | (with-current-buffer buf
99 | (string-equal major-mode 'shell-mode))))
100 | (buffer-list)))
101 |
102 | (defun better-shell-idle-shells (remote-host)
103 | "Return all the buffers with idle shells on REMOTE-HOST.
104 | If REMOTE-HOST is nil, returns a list of idle local shells."
105 | (let ((current-buffer (current-buffer)))
106 | (cl-remove-if-not
107 | (lambda (buf)
108 | (with-current-buffer buf
109 | (and
110 | (string-equal (file-remote-p default-directory) remote-host)
111 | (better-shell-idle-p buf)
112 | (not (eq current-buffer buf)))))
113 | (better-shell-shells))))
114 |
115 | (defun better-shell-default-directory (buf)
116 | "Return the default directory for BUF."
117 | (with-current-buffer buf
118 | default-directory))
119 |
120 | (defun better-shell-for-current-dir ()
121 | "Find or create a shell in the buffer's directory.
122 | See `better-shell-for-dir' for details on how shells are found or created."
123 | (interactive)
124 | (better-shell-for-dir default-directory))
125 |
126 | (defun better-shell-for-dir (dir)
127 | "Find or create a shell in DIR.
128 | The shell chosen is guaranteed to be idle (not running another
129 | command). It first looks for an idle shell that is already in
130 | the buffer's directory. If none is found, it looks for another
131 | idle shell on the same host as the buffer. If one is found, that
132 | shell will be chosen, and automatically placed into the buffer's
133 | directory with a \"cd\" command. Otherwise, a new shell is
134 | created in the buffer's directory."
135 | (interactive "D")
136 | (let ((idle-shell
137 | (or
138 | ;; get currently idle shells, ones with matching directory
139 | ;; first.
140 | (car (sort
141 | (better-shell-idle-shells
142 | (file-remote-p default-directory))
143 | (lambda (s1 s2)
144 | (string-equal dir (better-shell-default-directory s1)))))
145 | ;; make a new shell if there are none
146 | (shell (generate-new-buffer-name
147 | (if (file-remote-p dir)
148 | (with-parsed-tramp-file-name dir nil
149 | (format "*shell/%s*" host))
150 | "*shell*"))))))
151 |
152 | ;; cd in the shell if needed
153 | (when (not (string-equal dir (better-shell-default-directory idle-shell)))
154 | (let ((localdir (if (file-remote-p dir)
155 | (with-parsed-tramp-file-name dir nil localname)
156 | (expand-file-name dir))))
157 | (with-current-buffer idle-shell
158 | (comint-delete-input)
159 | (goto-char (point-max))
160 | (insert (concat "cd \"" localdir "\""))
161 | (comint-send-input))))
162 |
163 | ;; now we have an idle shell in the correct directory. Pop to it.
164 | (pop-to-buffer idle-shell)))
165 |
166 | (defun better-shell-tramp-hosts ()
167 | "Ask tramp for a list of hosts that we can reach through ssh."
168 | (cl-reduce 'append
169 | (mapcar (lambda (x)
170 | (cl-remove nil (mapcar 'cadr (apply (car x) (cdr x)))))
171 | (tramp-get-completion-function "scp"))))
172 |
173 | ;;;###autoload
174 | (defun better-shell-remote-open (&optional arg)
175 | "Prompt for a remote host to connect to, and open a shell
176 | there. With prefix argument, get a sudo shell."
177 | (interactive "p")
178 | (let*
179 | ((hosts
180 | (cl-reduce 'append
181 | (mapcar
182 | (lambda (x)
183 | (cl-remove nil (mapcar 'cadr (apply (car x) (cdr x)))))
184 | (tramp-get-completion-function "ssh"))))
185 | (remote-host (completing-read "Remote host: " hosts)))
186 | (if (and arg (= 4 arg))
187 | ;; this means sudo
188 | (let ((tramp-default-proxies-alist nil))
189 | ;; so that you don't get method overrides. ssh is the only one that works for sudo.
190 | (with-temp-buffer
191 | (cd (concat "/ssh:" remote-host "|sudo:" remote-host ":"))
192 | (shell (format "*shell/sudo:%s*" remote-host))))
193 | ;; non-sudo
194 | (with-temp-buffer
195 | (cd (concat "/" (or tramp-default-method "ssh") ":" remote-host ":"))
196 | (shell (format "*shell/%s*" remote-host))))))
197 |
198 | ;;;###autoload
199 | (defun better-shell-sudo-here ()
200 | "Reopen the current file, directory, or shell as root.
201 | For files and dired buffers, the non-sudo buffer is replaced with
202 | a sudo buffer. For shells, a sudo shell is opened but the
203 | non-sudo shell is left in tact."
204 | (interactive)
205 | (let ((f (expand-file-name (or buffer-file-name default-directory))))
206 | (when (string-match-p "\\bsudo:" f) (user-error "Already sudo"))
207 | (let ((sudo-f (if (file-remote-p f)
208 | (with-parsed-tramp-file-name f nil
209 | (let ((user-string
210 | (when user (concat user "@"))))
211 | (concat "/ssh:" user-string host "|sudo:" host ":" localname)))
212 | (concat "/sudo:localhost:" f)))
213 | (tramp-default-proxies-alist nil)
214 | ;; so that you don't get method overrides. ssh is the only one that works for sudo.
215 | )
216 | (unless f (user-error "No file or default directory in this
217 | buffer. This command can only be used in file buffers,
218 | dired buffers, or shell buffers"))
219 | (cond ((or buffer-file-name (eq major-mode 'dired-mode))
220 | (find-alternate-file sudo-f))
221 | ((eq major-mode 'shell-mode)
222 | (with-temp-buffer
223 | (cd sudo-f)
224 | (shell (format "*shell/sudo:%s*"
225 | (with-parsed-tramp-file-name sudo-f nil host)))))
226 | (t (message "Can't sudo this buffer"))
227 | ))))
228 |
229 | (defun better-shell-existing-shell ()
230 | "Switch to the next existing shell in the stack."
231 | (interactive)
232 | ;; rotate through existing shells
233 | (let* ((shells (better-shell-shells))
234 | (buf (nth (mod (+ (or (cl-position (current-buffer) shells) -1) 1)
235 | (length shells))
236 | shells)))
237 | (switch-to-buffer buf t)
238 | (set-transient-map ; Read next key
239 | `(keymap (,(elt (this-command-keys-vector) 0) .
240 | better-shell-existing-shell))
241 | t (lambda () (switch-to-buffer (current-buffer))))))
242 |
243 | ;;;###autoload
244 | (defun better-shell-shell (&optional arg)
245 | "Pop to an appropriate shell.
246 | Cycle through all the shells, most recently used first. When
247 | called with a prefix ARG, finds or creates a shell in the current
248 | directory."
249 | (interactive "p")
250 | (let ((shells (better-shell-shells)))
251 | (if (or (null shells) (and arg (= 4 arg)))
252 | (better-shell-for-current-dir)
253 | (better-shell-existing-shell))))
254 |
255 | ;;;###autoload
256 | (defun better-shell-for-projectile-root ()
257 | "Find or create a shell in the projectile root.
258 | See `better-shell-for-dir' for details on how shells are found or created."
259 | (interactive)
260 | (unless (fboundp 'projectile-project-root)
261 | (error "Projectile does not appear to be installed"))
262 | (better-shell-for-dir (projectile-project-root)))
263 |
264 | (provide 'better-shell)
265 | ;;; better-shell.el ends here
266 |
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