Suppose that the file A.txt is already opened with GNU-emacs, but I don't notice it, so I try opening it (again) with
emacs A.txt
Instead of just showing the already-open window it opens a second one!
(This is of course annoying, since I will end up with 2 conflicting versions.)
How can I avoid this (under ubuntu) ?
Command emacs starts a new instance of the application.
What you are looking for is emacsclient which connects to an existing emacs instance and tells it to edit the file.
You need to start the server first though.
I used to launch latex within Emacs on a .tex file by C-c C-c.
I just changed my machine, and need to reconfigure all. I have already installed texlive-full, and copied .emacs from the previous machine to the new machine.
When I open a .tex file under Emacs, launch C-c C-c, and then type LaTeX, it opens another buffer, named *tex-shell*, and looks like as so:
Could anyone tell me what happened?
I don't really now what happen, but it seem you want to use auctex:
sudo apt-get install auctex
and relaunch Emacs should solve your problem.
I want to keep emacs open most of the time, and then whenever I open a text file, python file, etc (from nautilus/finder), I want it to open as a new buffer in my current emacs instance, rather than starting a new instance.
I tried following this guide:
I wasn't really sure about what to do with the file, but what I tried was copying it to /usr/bin/emacs_openfile, adding #!/bin/sh to the first line, and running chmod +x emacs_openfile
However, it doesn't work for me and just opens a new instance, even though I was able to associate text files with this program.
On a sidenote, I set emacs as the default editor using this.
You want emacs client.
Basically, set emacsclient as your default editor, and add (server-start) somewere in your emacs config.
There needs to be a running Emacs instance for emacsclient to work, but if it's a hassle it's possible to have a headless Emacs launched at login.
Did you start server in emacs? Make sure that you add (server-start) to your .emacs or do M-x server-start from an existing EMACS session.
Conceptually, it's really easy, just do emacsclient file-name on the command line or where you name the program.
Just for your information, If you are using GUI version on Mac, the dir os emacsclient is below:
/Applications/Emacs.app/Contents/MacOS/bin/emacsclient
I started to use emacs for LateX editing again. Back in the days, it was configured automatically that C-c C-f would open the corresponding *.dvi file with evince. With the latest version of emacs, it does not do the same. Is there a way to open the doc with evince? (I am sure there is a way. It is emacs afterall).
Thanks!
I use this code with auctex-mode:
;; use evince for dvi and pdf viewer
;; evince-dvi backend should be installed
(setq TeX-view-program-selection
'((output-dvi "DVI Viewer")
(output-pdf "PDF Viewer")
(output-html "Google Chrome")))
(setq TeX-view-program-list
'(("DVI Viewer" "evince %o")
("PDF Viewer" "evince %o")
("Google Chrome" "google-chrome %o")))
You didn't mention if you're using auctex-mode or the old latex-mode that comes bundled with Emacs.
Depending on whether you are using AUCTeX or emacs' default LaTeX mode there are different configuration options to set this. I would suggest you have a look at them with customize-browse since the config strings can be pretty dense.
With AUCTeX
Browse to Emacs > Wp > Tex > AUCTeX > Tex Command > TeX View > TeX View Program Selection. Change the output-dvi viewer.
Plain LaTeX mode
Browser to Emacs > Wp > Tex > Tex View > Tex Dvi View Command.
Also, instead of directly hardcoding evince I would suggest putting xdg-open there and configuring your preferred dvi-viewer in your desktop environment. Then you need to worry about only one place to configure this in the future.
I had the same problem even with the correct settings for view commands. I had started the Emacs daemon from a shell inside screen. I then connected to the server with emacsclient using an X window. AucTeX checks two settings to see if you're using a window system and both are nil or undefined (the $DISPLAY variable and (window-system)) inside screen where I started the server.
So in my case, starting the Emacs daemon from a shell running in an X window solved the problem.
I guess it would help if AucTeX checked the variables for each Emacs frame separately because it shouldn't matter where the server was started but what kind of client (tty or X) you use AucTeX in.
I am fairly new to Emacs and I have been trying to figure out how to change the default folder for C-x C-f on start-up. For instance when I first load Emacs and hit C-x C-f its default folder is C:\emacs\emacs-21.3\bin, but I would rather it be the desktop. I believe there is some way to customize the .emacs file to do this, but I am still unsure what that is.
Update: There are three solutions to the problem that I found to work, however I believe solution 3 is Windows only.
Solution 1: Add (cd "C:/Users/Name/Desktop") to the .emacs file
Solution 2: Add (setq default-directory "C:/Documents and Settings/USER_NAME/Desktop/") to the .emacs file
Solution 3: Right click the Emacs short cut, hit properties and change the start in field to the desired directory.
You didn't say so, but it sounds like you're starting Emacs from a Windows shortcut.
The directory that you see with c-x c-f is the cwd, in Emacs terms, the default-directory (a variable).
When you start Emacs using an MS Windows shortcut, the default-directory is initially the folder (directory) specified in the "Start In" field of the shortcut properties. Right click the shortcut, select Properties, and type the path to your desktop in the Start In field.
If you're using Emacs from the command line, default-directory starts as the directory where you started Emacs (the cwd).
This approach is better than editing your .emacs file, since it will allow you to have more than one shortcuts with more than one starting directory, and it lets you have the normal command line behavior of Emacs if you need it.
CWD = current working directory = PWD = present working directory. It makes a lot more sense at the command line than in a GUI.
I think the line you need to add to your .emacs is is
(setq default-directory "C:/Documents and Settings/USER NAME/Desktop/" )
Emacs will start in your desktop that way, unless you have a file open. It will usually start in the same directory as the file in your current buffer otherwise.
You can type the 'cd' emacs command. ( M-x cd ) to change the default folder as a one off.
I've put
(cd "c:/cvsroot/")
in my .emacs and it did the job
The default folder is actually the same as the current working folder for the buffer, i.e. it can be different for every file you work with. Say that the file you are working with is located in C:\dir_a, then the working directory for that buffer will by default be C:\dir_a. You can change this with M-x cd and type in whatever directory you would like to be the default instead (and by default I mean the one that will show up when you do C-x C-f).
If you start emacs without opening a file, you will end up with the *scratch* buffer open. If you started emacs from a Windows shortcut, the working directory will be the same as that specified in the shortcut properties. If you started it from the command line, it will be the directory from where you started it. You can still change this default directory with M-x cd, also from the *scratch* buffer.
Finally, you can do as Vadim suggests and put
(cd "c:/dir_a/")
in your .emacs file, to make that directory the default no matter how you start emacs.
As you're on Windows you can do it with a shortcut.
Create a shortcut to C:\emacs\emacs-21.3\bin\runemacs.exe. Edit the properties of the shortcut and change the value of Start In: to be whatever you want your default directory to be.
I am using emacs 22.2.1 under Windows XP and have been helped by the answers above to get the response in the minibuffer I want to the command C-x C-f. Initially I was getting
"Find file: C:\Program Files\emacs\bin/" like Anton.
I have HOME set to "C:\Documents and settings\USER NAME\My Documents".
The response to C-x C-f I want in the minibuffer is "Find file: ~/".
By adding (setq default-directory "C:/Documents and Settings/USER NAME/My Documents") to my .emacs file I was able to get the response "Find file: C:\Documents and settings\USER NAME\My Documents/" which is functionally the same as "Find file: ~/".
However, I noticed one further point. "Customize Emacs" under "Options" allowed me to inhibit the startup screen. Now when I open emacs I go immediately to the scratch buffer. When I type C-x C-f in the scratch buffer I get the exact response I want.
I have added to my shortcut (in Gnome, Linux) a pramater which is a blank dummy file name, and I specify the directory. Since my emacs defaults to "home" I simply say:
/Desktop/blank_file
and that opens a file called "blank_file"
That also moves the current working directory for that emacs session to the desktop.
If I happen to put stuff in "blank_file" then save it, of course, I've got that stuff saved. Which might be an annoyance or it might be a good thing, depending!
To change default directory to DESKTOP in Dired and shell put this in your ~/.emacs:
;;This works for Windows XP.
(setq default-directory (concat "C:\Documents and Settings\MY_ACCOUNT\DESKTOP\"))
For windows users, the best way that I found is to create the shortcut for runemacs.exe and placing the shortcut in the root directory of my notes folder.
This way, when you use this shortcut to open emacs, it will by default open in the root directory without having to specifically set the Start In property (you can leave the Start In property blank).
Reference: According to Microsoft, if you leave the 'Start In' box empty, the script will run in the current working directory
TIP:
Additionally, if you have organized your notes into multiple root folders (Personal, Work etc...), you can copy multiple such shortcuts in each folder to open various instances of emacs with their own default directories.
In Windows 8, it works to create a shortcut in the Desktop and change the property 'Start In:' for the shortcut.
Now, I ran the program emacs-23.3\bin\addpm.exe as recommended, and the Windows-8 screen (that horrendous invention from Microsoft) it appeared an icon-link to Emacs. But there you have to change again the property 'Start In'. (It is different from the one in the desktop).
Just right-click, choose in the bottom bar 'Open the file location' (or similar, I did it in my language), and you are taken to the folder with a new shortcut, in which you can (must) also change the property 'Start In:'.
A little involved, but in fact very easy.
Since the most annoying thing is having windows Emacs dump you into system32 when you are just using the shortcut, but want every other case to work, just use a bit of elisp...
(when (string< "C:\WINDOWS\system32" default-directory) (setq default-directory "~/"))
So it will only default to your home directory when you end up in system. The only drawback is if you really want to start emacs in system32...