GNU Emacs Introduction

+ Installation and setup +

+ Installing + +

First, you must install Emacs.

+=09 +

+	  # emerge --pretend --verbose app-editors/emacs
+

+ + + + + + + + + alsa + Determine if ALSA should be used + Emacs autodetects ALSA. That test is removed by the ebuild if + the flag is not set. This is for cases where ALSA is installed b= ut + the user does not wish support for it in Emacs. + + + dbus + Make Emacs D-Bus aware (Emacs 23 only). + + + + gif + Support for GIF images. + + + + gpm + Support for console-based mouse driver (Emacs 23 only). + + + + gtk + Use the GIMP Toolkit (GTK+) as windowing toolkit (menu bar + etc.) + When this toolkit is activated along with alternative ones (see + other USE flags), GTK+ is chosen. This is in sync with upstream's + wishes. + + + gzip-el + Zip up all el files. + The zip binary is autodetected. So even when this USE flag is + disabled but the binary is found, all el files will be compressed= . + The ebuild takes of that care by confusing the configure + script. + + + hesiod + Use the Hesiod name service system. + + + + jpeg + Support for JPEG images. + + + + kerberos + Support for the Kerberos network authentication protocol. + + + + leim + Extended methods for input encodings (Emacs 21 only). + + + + m17n-lib + Use the m17n-lib multilingual library for complex text layout, + e.g. for Indic scripts (Emacs 23 only). + Only available if "xft" is enabled too. + + + motif + A windowing toolkit. + + + + nls + This makes use of gettext, an easy way to provide translations + of strings (Emacs 21 only). + + + + png + Support for PNG images. + + + + sendmail + Build with support for mail transfer agent (Emacs 21 only). + + + + sound + Control the availability of sound support. + + + + source + Install the C source files and make them available in the + internal documentation system of GNU Emacs. + + + + svg + Support for SVG images (Emacs 23 only). + + + + tiff + Support for TIFF images. + + + + toolkit-scroll-bars + Instead of the internal scroll bars, the ones from the windowin= g + toolkit are used. + You will lose some functionality (split windows by clicking on + the scroll bar for example). + + + X + Let Emacs use an X session if available. Text mode can always + be forced. + + + + Xaw3d + A windowing toolkit. + + + + xft + Choose an alternative font renderer (Emacs 23 only). + + + + xpm + Support for XPM images. + If disabled, all logos, icons etc. in Emacs are displayed in + grayscale. This flag is forced through EAPI 1 features. + +

Flag	Description	Notes

+ You could unpack the Emacs sources and run ./configure + --help to see the optional support. If you don't use the X + or gtk flags, you will rely on the keyboard to use Emacs. + Otherwise, emacs -nw is the terminal mode. +

+ +

+ Eselect + +

+	  # emerge app-admin/eselect
+	  # eselect emacs list
+	  Available Emacs symlink targets:
+	  [1]   emacs-22
+	  [2]   emacs-23 *
+    	  # eselect emacs set 1
+	  Switching emacs to emacs-22 ...
+	  Switching ctags to exuberant-ctags ...
+	  Switching etags to etags-emacs-22 ...
+	  # eselect emacs list
+	  Available Emacs symlink targets:
+	  [1]   emacs-22 *
+	  [2]   emacs-23
+

+ +

+ Client/Server + +

+ Emacs can work as a server for emacsclient. To use this type M-x + server-start in a running Emacs session. Then it's emacsclient + file1 file2 file3 to edit your files or mail. +

+ +

+ Modes + +

+ Some types of files have modes created for them. If you edit + Python or PHP code, this piece of information is for you. This + is a convenient way to install elisp files (.el and + byte-compiled .elc) thanks to the Emacs team! This is done as + root. Note the # prompt. +

+	  # emerge --pretend --verbose app-emacs/python-mode
+	  # emerge --pretend --verbose app-emacs/php-mode
+	  Cscope can work with Emacs very conveniently.
+	  # echo "dev-util/cscope emacs" >> /etc/portage/package.use
+	  That will append the quoted text to the file "/etc/portage/package.us=
e".
+	  # emerge dev-util/cscope
+

+ +

+ Built-in tutorial + +

There is a tutorial for Emacs available.

+	  M-x help-with-tutorial
+

+ That is Meta then x. The Meta key is escape or possibly Alt. Next + you need to type help and use tab twice to see the completions. +

+ +

+ C-x 0 This makes the current buffer go away. + C-x 1 This makes the current buffer take full screen. + C-x 2 This will initiate the split and you can browse two= different parts of a file. + C-x 3 This is useful if you have a wide screen. +

$ cat ~/.emacs.d/init.el

(prefer-coding-system 'utf-8)

(setq transient-mark-mode t)

(show-paren-mode t)

(setq column-number-mode t)

(global-set-key [(f5)] (lambda() (interactive) (woman (current-= word))))

(global-set-key [(f6)] 'hippie-expand)

(global-set-key [(f7)] 'replace-regexp)

(global-set-key [(f8)] 'flush-lines)

(global-set-key [(f9)] 'dired-do-delete)

# cat /root/.emacs.d/init.el

(load "/home/username/.emacs.d/init.el")