diff options
authorLev Lamberov <>2016-09-23 01:49:43 -0300
committerLev Lamberov <>2016-09-23 01:49:43 -0300
commite03d1083e03b3c5f11d450de89c370343c53215c (patch)
Import restart-emacs_0.1.1.orig.tar.gz
[dgit import orig restart-emacs_0.1.1.orig.tar.gz]
12 files changed, 1161 insertions, 0 deletions
diff --git a/.dir-locals.el b/.dir-locals.el
new file mode 100644
index 0000000..6c402ec
--- /dev/null
+++ b/.dir-locals.el
@@ -0,0 +1,4 @@
+ (compile-command . "cask exec ert-runner")
+ (eval ignore-errors
+ (push (quote ("Tests" "(\\(\\<ert-deftest\\)\\>\\s *\\(\\(?:\\sw\\|\\s_\\)+\\)?" 2)) imenu-generic-expression))))
diff --git a/.ert-runner b/.ert-runner
new file mode 100644
index 0000000..5b9beb1
--- /dev/null
+++ b/.ert-runner
@@ -0,0 +1 @@
+--reporter ert \ No newline at end of file
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..28f0a7d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..1206e1a
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,50 @@
+language: emacs-lisp
+sudo: false
+ - EVM_EMACS=emacs-24.5
+ - EVM_EMACS=emacs-24.4
+ - EVM_EMACS=emacs-24.3
+ - EVM_EMACS=emacs-24.2
+ - EVM_EMACS=emacs-24.1
+ apt: true
+ directories:
+ - $HOME/emacsen
+ apt:
+ packages:
+ - python
+ - curl
+ - libxpm-dev
+ - texinfo
+ - x11-utils
+ - xdotool
+ - "export DISPLAY=:99.0"
+ - "sh -e /etc/init.d/xvfb start"
+ - sleep 3
+ - curl -fsSkL | bash
+ - export PATH="$HOME/.evm/bin:$PATH"
+ - mkdir -p $HOME/emacsen
+ - evm config path $HOME/emacsen
+ - evm install $EVM_EMACS --skip
+ - evm use $EVM_EMACS
+ - curl -fsSL | python
+ - export PATH="/home/travis/.cask/bin:$PATH"
+ - cask install
+ - cask exec ert-runner
+ - sh
+ email:
+ recipients:
+ -
+ on_success: never
+ on_failure: always \ No newline at end of file
diff --git a/Cask b/Cask
new file mode 100644
index 0000000..45fc6e5
--- /dev/null
+++ b/Cask
@@ -0,0 +1,11 @@
+(source gnu)
+(source melpa)
+(package-file "restart-emacs.el")
+(files "*.el")
+ (depends-on "f")
+ (depends-on "ecukes")
+ (depends-on "ert-runner")
+ (depends-on "el-mock"))
diff --git a/ b/
new file mode 100644
index 0000000..2cf4e9e
--- /dev/null
+++ b/
@@ -0,0 +1,9 @@
+* v0.1.1
+ Bugfix release fixing issues on Emacs versions older than v24.3 (and greater
+ than v24.1)
+** Do not wait for output from new instance of Emacs spawned in parent Emacs
+** Signals `error` instead of `user-error` if the later is not available (Emacs older than v24.3)
+** Add tests
+* v0.1
+ Initial public release
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..bc08fe2
--- /dev/null
@@ -0,0 +1,619 @@
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+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+ 14. Revised Versions of this License.
+ The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+ Each version is given a distinguishing version number. If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+ If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+ Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+ 15. Disclaimer of Warranty.
+ 16. Limitation of Liability.
+ 17. Interpretation of Sections 15 and 16.
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
diff --git a/ b/
new file mode 100644
index 0000000..437db91
--- /dev/null
+++ b/
@@ -0,0 +1,63 @@
+* Restart Emacs
+ [[][file:]] [[][file:]] [[][]]
+** Table of contents :TOC_3_gh:
+ - [[#restart-emacs][Restart Emacs]]
+ - [[#what-is-this][What is this?]]
+ - [[#installation][Installation]]
+ - [[#elpa][ELPA]]
+ - [[#el-get][El-get]]
+ - [[#usage][Usage]]
+ - [[#compatibility][Compatibility]]
+ - [[#restarting-gui-emacs][Restarting GUI Emacs]]
+ - [[#restarting-emacs-running-in-a-terminal][Restarting Emacs running in a terminal]]
+** What is this?
+ This is a simple package to restart Emacs for within Emacs. Inspired by [[][this]]
+ stackoverflow question.
+** Installation
+*** ELPA
+ ~restart-emacs~ is available on [[][MELPA]] and [[][MELPA Stable]]. Please follow the instructions on
+ MELPA [[][website]] to enable it, if you haven't already.
+ You can then install ~restart-emacs~ from the [[][package menu]]. Alternatively install it by doing the following
+ Refresh the package index
+ M-x package-refresh-contents RET
+ And then install it by doing
+ M-x package-install RET restart-emacs
+*** El-get
+ ~restart-emacs~ can also be installed using ~el-get~. Assuming you have latest version of el-get installing it by doing something similar to
+ M-x el-get-install RET restart-emacs
+** Usage
+ It offers only one command ~restart-emacs~ which kills current Emacs session
+ and starts a new session.
+ Additional arguments to be passed to the new instance can be specified using
+ prefix arguments
+ - with a single ~universal-argument~ (=C-u=) Emacs is restarted with ~--debug-init~ flag
+ - with two ~universal-argument~ (=C-u= =C-u=) Emacs is restarted with ~-Q~ flag
+ - with three ~universal-argument~ (=C-u= =C-u= =C-u=) the user is prompted for the arguments
+** Compatibility
+*** Restarting GUI Emacs
+ Restarting graphical Emacs should work on any UNIXy system with ~sh~ and on
+ Windows.
+*** Restarting Emacs running in a terminal
+ This requires that the shell from which Emacs was launched supports job
+ control. This has been tested to work on ~sh~, ~bash~, ~zsh~, ~fish~, ~csh~
+ and ~tcsh~, however this does not work on Windows.
diff --git a/ b/
new file mode 100644
index 0000000..f1a5b56
--- /dev/null
+++ b/
@@ -0,0 +1,101 @@
+# This scripts tests that Emacs restarts successfully under X
+# It requires the following utilities installed
+# xprop - Available in x11-utils package on Ubuntu
+# xwininfo - Available in x11-utils package on Ubuntu
+# xdotool - Available in xdotool package on Ubuntu
+if [ -z "$DISPLAY" ] ; then
+ echo "This script works only under X!"
+ echo "Exiting ..."
+ exit 2
+if [ -z $(which xprop 2> /dev/null) ] || [ -z $(which xwininfo 2> /dev/null) ] || [ -z $(which xdotool 2> /dev/null) ] ; then
+ echo "This script requires xprop, xwininfo and xdotool to work."
+ echo "If you are on Ubuntu, please install x11-utils and xdotools packages to get these tools."
+ echo "Exiting ..."
+ exit 2
+poll_emacs_started () {
+ for i in $(seq 1 10) ; do
+ echo "Checking if Emacs started ... "
+ if xwininfo -name $EMACS_WIN_NAME > /dev/null 2>&1 ; then
+ echo "Emacs has started ... "
+ return 0
+ elif [ $i = 10 ] ; then
+ echo "Giving up after 10 tries ... "
+ return 1
+ fi
+ echo "Emacs hasn't started yet! Will try again in 5 seconds ... "
+ sleep 5
+ done
+# So that user config does not interfere with functioning of test Emacs
+# Name that should be given Emacs window, makes easier to search for window
+# Setup things so that Emacs window is renamed appropriately after starting
+mkdir -p /tmp/.emacs.d/
+printf "(modify-frame-parameters nil (list (cons 'name \"$EMACS_WIN_NAME\")))" > /tmp/.emacs.d/init.el
+# Launch Emacs
+cask exec emacs -l restart-emacs.el > /dev/null 2>&1 &
+if poll_emacs_started ; then
+ EMACS_WINDOW_ID=$(xwininfo -name $EMACS_WIN_NAME | grep 'Window id:' | awk -F' ' '{print $4}')
+ ORIG_EMACS_PID=$(xprop -name $EMACS_WIN_NAME | grep PID | awk -F' = ' '{print $2}')
+ echo "Found Emacs running with window id $EMACS_WINDOW_ID and pid $ORIG_EMACS_PID .. "
+ sleep 1
+ echo "Asking Emacs to restart .. "
+ xdotool search --name $EMACS_WIN_NAME key alt+x
+ sleep 1
+ xdotool search --name $EMACS_WIN_NAME type 'restart-emacs'
+ sleep 1
+ xdotool search --name $EMACS_WIN_NAME key Return
+ sleep 5
+ if poll_emacs_started ; then
+ RESTARTED_EMACS_PID=$(xprop -name $EMACS_WIN_NAME | grep PID | awk -F' = ' '{print $2}')
+ echo "Successfully restarted Emacs!"
+ echo "Test PASSED"
+ else
+ echo "The original Emacs was not killed properly!"
+ echo "Test FAILED"
+ fi
+ else
+ echo "Could not restart Emacs, after killing original one!"
+ echo "Test FAILED"
+ fi
+ echo "Could start Emacs, please check for errros and try again!"
+# Cleanup
+xdotool search --name $EMACS_WIN_NAME key ctrl+x
+xdotool search --name $EMACS_WIN_NAME key ctrl+c
+exit $SUCCESS
diff --git a/restart-emacs.el b/restart-emacs.el
new file mode 100644
index 0000000..c5e4f8d
--- /dev/null
+++ b/restart-emacs.el
@@ -0,0 +1,159 @@
+;;; restart-emacs.el --- Restart emacs from within emacs -*- lexical-binding: t; -*-
+;; Copyright (C) 2015 Iqbal Ansari
+;; Author: Iqbal Ansari <>
+;; Keywords: convenience
+;; URL:
+;; Version: 0.1.1
+;; 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
+;; 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:
+;; This package provides a simple command to restart Emacs from within Emacs
+;;; Code:
+;; Making the byte compiler happy
+(declare-function w32-shell-execute "w32fns.c")
+;; Compatibility functions
+(defun restart-emacs--string-join (strings &optional separator)
+ "Join all STRINGS using SEPARATOR.
+This function is available on Emacs v24.4 and higher, it has been
+backported here for compatibility with older Emacsen."
+ (if (fboundp 'string-join)
+ (apply #'string-join (list strings separator))
+ (mapconcat 'identity strings separator)))
+(defun restart-emacs--user-error (format &rest args)
+ "Signal a `user-error' if available otherwise signal a generic `error'.
+FORMAT and ARGS correspond to STRING and OBJECTS arguments to `format'."
+ (if (fboundp 'user-error)
+ (apply #'user-error format args)
+ (apply #'error format args)))
+;; Core functions
+(defvar restart-emacs--args nil
+ "The arguments with which to restart Emacs is bound dynamically.")
+(defun restart-emacs--get-emacs-binary ()
+ "Get absolute path to binary of currently running Emacs."
+ (expand-file-name invocation-name invocation-directory))
+(defun restart-emacs--start-gui-using-sh (&optional args)
+ "Start GUI version of Emacs using sh.
+ARGS is the list arguments with which Emacs should be started"
+ (call-process "sh" nil
+ 0 nil
+ "-c" (format "%s %s &"
+ (shell-quote-argument (restart-emacs--get-emacs-binary))
+ (restart-emacs--string-join (mapcar #'shell-quote-argument
+ args)
+ " "))))
+(defun restart-emacs--start-gui-on-windows (&optional args)
+ "Start GUI version of Emacs on windows.
+ARGS is the list arguments with which Emacs should be started"
+ (w32-shell-execute "open" (restart-emacs--get-emacs-binary) args))
+(defun restart-emacs--start-emacs-in-terminal (&optional args)
+ "Start Emacs in current terminal.
+ARGS is the list arguments with which Emacs should be started. This requires a
+shell with `fg' command and `;' construct. This has been tested to work with
+sh, bash, zsh, fish, csh and tcsh shells"
+ (suspend-emacs (format "fg ; %s %s -nw"
+ (shell-quote-argument (restart-emacs--get-emacs-binary))
+ (restart-emacs--string-join (mapcar #'shell-quote-argument
+ args)
+ " "))))
+(defun restart-emacs--ensure-can-restart ()
+ "Ensure we can restart Emacs on current platform."
+ (when (and (not (display-graphic-p))
+ (memq system-type '(windows-nt ms-dos)))
+ (restart-emacs--user-error (format "Cannot restart emacs running in terminal on system of type `%s'" system-type))))
+(defun restart-emacs--launch-other-emacs ()
+ "Launch another Emacs session according to current platform."
+ (apply (if (display-graphic-p)
+ (if (memq system-type '(windows-nt ms-dos))
+ #'restart-emacs--start-gui-on-windows
+ #'restart-emacs--start-gui-using-sh)
+ (if (memq system-type '(windows-nt ms-dos))
+ ;; This should not happen since we check this before triggering a restart
+ (restart-emacs--user-error "Cannot restart Emacs running in a windows terminal")
+ #'restart-emacs--start-emacs-in-terminal))
+ ;; Since this function is called in `kill-emacs-hook' it cannot accept
+ ;; direct arguments the arguments are let-bound instead
+ (list restart-emacs--args)))
+(defun restart-emacs--translate-prefix-to-args (prefix)
+ "Translate the given PREFIX to arguments to be passed to Emacs.
+It does the following translation
+ `C-u' => --debug-init
+ `C-u' `C-u' => -Q
+`C-u' `C-u' `C-u' => Reads the argument from the user in raw form"
+ (cond ((equal prefix '(4)) '("--debug-init"))
+ ((equal prefix '(16)) '("-Q"))
+ ((equal prefix '(64)) (split-string (read-string "Arguments to start Emacs with (separated by space): ")
+ " "))))
+;; User interface
+(defun restart-emacs (&optional args)
+ "Restart Emacs.
+When called interactively ARGS is interpreted as follows
+- with a single `universal-argument' (`C-u') Emacs is restarted
+ with `--debug-init' flag
+- with two `universal-argument' (`C-u') Emacs is restarted with
+ `-Q' flag
+- with three `universal-argument' (`C-u') the user prompted for
+ the arguments
+When called non-interactively ARGS should be a list of arguments
+with which Emacs should be restarted."
+ (interactive "P")
+ ;; Do not trigger a restart unless we are sure, we can restart emacs
+ (restart-emacs--ensure-can-restart)
+ ;; We need the new emacs to be spawned after all kill-emacs-hooks
+ ;; have been processed and there is nothing interesting left
+ (let ((kill-emacs-hook (append kill-emacs-hook (list #'restart-emacs--launch-other-emacs)))
+ (restart-emacs--args (if (called-interactively-p 'any)
+ (restart-emacs--translate-prefix-to-args args)
+ args)))
+ (save-buffers-kill-emacs)))
+(provide 'restart-emacs)
+;;; restart-emacs.el ends here
diff --git a/test/restart-emacs-test.el b/test/restart-emacs-test.el
new file mode 100644
index 0000000..02d0115
--- /dev/null
+++ b/test/restart-emacs-test.el
@@ -0,0 +1,123 @@
+;;; restart-emacs-test.el --- Tests for restart-emacs -*- lexical-binding: t; -*-
+;;; Commentary:
+;;; Tests for restart-emacs, major use case is to run from the command-line
+;;; using `cask exec ert-runner' but can be run interactively as well. Do
+;;; M-x `eval-buffer' RET
+;;; Code:
+;; For interactive testing
+(unless noninteractive
+ (load (expand-file-name "test-helper.el") t))
+(require 'restart-emacs)
+(require 'ert)
+(require 'el-mock)
+;; el-mock requires this
+(require 'cl)
+(require 'cl-lib)
+(ert-deftest restart-emacs-test-prefix-translation ()
+ (with-mock
+ (stub read-string => "read string")
+ (should (equal (restart-emacs--translate-prefix-to-args '(4)) '("--debug-init")))
+ (should (equal (restart-emacs--translate-prefix-to-args '(16)) '("-Q")))
+ (should (equal (restart-emacs--translate-prefix-to-args '(64)) '("read" "string")))))
+(ert-deftest restart-emacs-test-restart-capability ()
+ (with-mock
+ (stub display-graphic-p => nil)
+ ;; `signal' tries to use this (and fails) if `system-type' is `windows-nt',
+ ;; stub it out
+ (stub w32-long-file-name => "/tmp")
+ (let ((system-type 'windows-nt))
+ (should-error (restart-emacs--ensure-can-restart) :type (if (version<= "24.3" emacs-version)
+ 'user-error
+ 'error)))
+ (let ((system-type 'ms-dos))
+ (should-error (restart-emacs--ensure-can-restart) :type (if (version<= "24.3" emacs-version)
+ 'user-error
+ 'error))))
+ (with-mock
+ (stub display-graphic-p => t)
+ (let ((system-type 'windows-nt))
+ (should-not (restart-emacs--ensure-can-restart)))
+ (let ((system-type 'ms-dos))
+ (should-not (restart-emacs--ensure-can-restart)))))
+(ert-deftest restart-emacs-test-path-calculation ()
+ (let ((invocation-name "emacs")
+ (invocation-directory "/tmp/test/"))
+ (should (string= (restart-emacs--get-emacs-binary) "/tmp/test/emacs"))))
+(ert-deftest restart-emacs-test-gui-using-sh ()
+ (with-mock
+ (stub restart-emacs--get-emacs-binary => "/tmp/bin/emacs")
+ (mock (call-process "sh" nil
+ 0 nil
+ "-c" "/tmp/bin/emacs --debug-init &"))
+ (should-not (restart-emacs--start-gui-using-sh '("--debug-init")))))
+(ert-deftest restart-emacs-test-gui-on-windows ()
+ (with-mock
+ (stub restart-emacs--get-emacs-binary => "/tmp/bin/emacs")
+ (mock (w32-shell-execute "open" "/tmp/bin/emacs" '("--debug-init")))
+ (should-not (restart-emacs--start-gui-on-windows '("--debug-init")))))
+(ert-deftest restart-emacs-test-start-emacs-in-terminal ()
+ (with-mock
+ (stub restart-emacs--get-emacs-binary => "/tmp/bin/emacs")
+ (mock (suspend-emacs "fg ; /tmp/bin/emacs --debug-init -nw"))
+ (should-not (restart-emacs--start-emacs-in-terminal '("--debug-init")))))
+(ert-deftest restart-emacs-test-strategy ()
+ (with-mock
+ (stub display-graphic-p => nil)
+ ;; `signal' tries to use this (and fails) if `system-type' is `windows-nt',
+ ;; stub it out
+ (stub w32-long-file-name => "/tmp")
+ (mock (restart-emacs--start-emacs-in-terminal nil) :times 5)
+ (dolist (system '(gnu gnu/linux gnu/kfreebsd darwin cygwin))
+ (let ((system-type system))
+ (should-not (restart-emacs--launch-other-emacs))))
+ (dolist (system '(windows-nt ms-dos))
+ (let ((system-type system))
+ (should-error (restart-emacs--launch-other-emacs) :type (if (version<= "24.3" emacs-version)
+ 'user-error
+ 'error)))))
+ (with-mock
+ (stub display-graphic-p => t)
+ (mock (restart-emacs--start-gui-using-sh nil) :times 5)
+ (mock (restart-emacs--start-gui-on-windows nil) :times 2)
+ (dolist (system '(gnu gnu/linux gnu/kfreebsd darwin cygwin))
+ (let ((system-type system))
+ (should-not (restart-emacs--launch-other-emacs))))
+ (dolist (system '(windows-nt ms-dos))
+ (let ((system-type system))
+ (should-not (restart-emacs--launch-other-emacs))))))
+(ert-deftest restart-emacs-test-restart-setup ()
+ (cl-letf (((symbol-function 'save-buffers-kill-emacs)
+ (lambda nil
+ (should (equal (cl-position #'restart-emacs--launch-other-emacs kill-emacs-hook)
+ (1- (length kill-emacs-hook)))))))
+ (restart-emacs)
+ ;; Make sure that hook to restart emacs is removed after the function
+ ;; restart-emacs exits
+ (should-not (cl-find #'restart-emacs--launch-other-emacs kill-emacs-hook))))
+(unless noninteractive
+ (ert "^restart-emacs-"))
+(provide 'restart-emacs-test)
+;;; restart-emacs-test.el ends here
diff --git a/test/test-helper.el b/test/test-helper.el
new file mode 100644
index 0000000..606e75a
--- /dev/null
+++ b/test/test-helper.el
@@ -0,0 +1,20 @@
+;;; test-helper.el --- Tests for restart-emacs -*- lexical-binding: t; -*-
+;;; Commentary:
+;;; Helpers to write tests for restart-emacs
+;;; Code:
+;; Setup load-path, some of this is redundant when tests are run from the
+;; command line
+(let ((project-dir (locate-dominating-file (or (buffer-file-name) load-file-name)
+ ".cask")))
+ (if (not project-dir)
+ (user-error "Could not locate project root")
+ (let ((default-directory (expand-file-name (concat ".cask/" emacs-version) project-dir)))
+ (normal-top-level-add-subdirs-to-load-path))
+ (add-to-list 'load-path project-dir)))
+(provide 'test-helper)
+;;; test-helper.el ends here