Vim documentation: usr_05
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*usr_05.txt* For Vim version 7.3. Last change: 2009 Jun 04
VIM USER MANUAL - by Bram Moolenaar
Set your settings
Vim can be tuned to work like you want it to. This chapter shows you how to
make Vim start with options set to different values. Add plugins to extend
Vim's capabilities. Or define your own macros.
|05.1| The vimrc file
|05.2| The example vimrc file explained
|05.3| Simple mappings
|05.4| Adding a plugin
|05.5| Adding a help file
|05.6| The option window
|05.7| Often used options
Next chapter: |usr_06.txt| Using syntax highlighting
Previous chapter: |usr_04.txt| Making small changes
Table of contents: |usr_toc.txt|
==============================================================================
*05.1* The vimrc file *vimrc-intro*
You probably got tired of typing commands that you use very often. To start
Vim with all your favorite option settings and mappings, you write them in
what is called the vimrc file. Vim executes the commands in this file when it
starts up.
If you already have a vimrc file (e.g., when your sysadmin has one setup for
you), you can edit it this way:
:edit $MYVIMRC
If you don't have a vimrc file yet, see |vimrc| to find out where you can
create a vimrc file. Also, the ":version" command mentions the name of the
"user vimrc file" Vim looks for.
For Unix and Macintosh this file is always used and is recommended:
~/.vimrc
For MS-DOS and MS-Windows you can use one of these:
$HOME/_vimrc
$VIM/_vimrc
The vimrc file can contain all the commands that you type after a colon. The
most simple ones are for setting options. For example, if you want Vim to
always start with the 'incsearch' option on, add this line you your vimrc
file:
set incsearch
For this new line to take effect you need to exit Vim and start it again.
Later you will learn how to do this without exiting Vim.
This chapter only explains the most basic items. For more information on how
to write a Vim script file: |usr_41.txt|.
==============================================================================
*05.2* The example vimrc file explained *vimrc_example.vim*
In the first chapter was explained how the example vimrc (included in the
Vim distribution) file can be used to make Vim startup in not-compatible mode
(see |not-compatible|). The file can be found here:
$VIMRUNTIME/vimrc_example.vim
In this section we will explain the various commands used in this file. This
will give you hints about how to set up your own preferences. Not everything
will be explained though. Use the ":help" command to find out more.
set nocompatible
As mentioned in the first chapter, these manuals explain Vim working in an
improved way, thus not completely Vi compatible. Setting the 'compatible'
option off, thus 'nocompatible' takes care of this.
set backspace=indent,eol,start
This specifies where in Insert mode the <BS> is allowed to delete the
character in front of the cursor. The three items, separated by commas, tell
Vim to delete the white space at the start of the line, a line break and the
character before where Insert mode started.
set autoindent
This makes Vim use the indent of the previous line for a newly created line.
Thus there is the same amount of white space before the new line. For example
when pressing <Enter> in Insert mode, and when using the "o" command to open a
new line.
if has("vms")
set nobackup
else
set backup
endif
This tells Vim to keep a backup copy of a file when overwriting it. But not
on the VMS system, since it keeps old versions of files already. The backup
file will have the same name as the original file with "~" added. See |07.4|
set history=50
Keep 50 commands and 50 search patterns in the history. Use another number if
you want to remember fewer or more lines.
set ruler
Always display the current cursor position in the lower right corner of the
Vim window.
set showcmd
Display an incomplete command in the lower right corner of the Vim window,
left of the ruler. For example, when you type "2f", Vim is waiting for you to
type the character to find and "2f" is displayed. When you press "w" next,
the "2fw" command is executed and the displayed "2f" is removed.
+-------------------------------------------------+
|text in the Vim window |
|~ |
|~ |
|-- VISUAL -- 2f 43,8 17% |
+-------------------------------------------------+
^^^^^^^^^^^ ^^^^^^^^ ^^^^^^^^^^
'showmode' 'showcmd' 'ruler'
set incsearch
Display the match for a search pattern when halfway typing it.
map Q gq
This defines a key mapping. More about that in the next section. This
defines the "Q" command to do formatting with the "gq" operator. This is how
it worked before Vim 5.0. Otherwise the "Q" command starts Ex mode, but you
will not need it.
vnoremap _g y:exe "grep /" . escape(@", '\\/') . "/ *.c *.h"<CR>
This mapping yanks the visually selected text and searches for it in C files.
This is a complicated mapping. You can see that mappings can be used to do
quite complicated things. Still, it is just a sequence of commands that are
executed like you typed them.
if &t_Co > 2 || has("gui_running")
syntax on
set hlsearch
endif
This switches on syntax highlighting, but only if colors are available. And
the 'hlsearch' option tells Vim to highlight matches with the last used search
pattern. The "if" command is very useful to set options only when some
condition is met. More about that in |usr_41.txt|.
*vimrc-filetype*
filetype plugin indent on
This switches on three very clever mechanisms:
1. Filetype detection.
Whenever you start editing a file, Vim will try to figure out what kind of
file this is. When you edit "main.c", Vim will see the ".c" extension and
recognize this as a "c" filetype. When you edit a file that starts with
"#!/bin/sh", Vim will recognize it as a "sh" filetype.
The filetype detection is used for syntax highlighting and the other two
items below.
See |filetypes|.
2. Using filetype plugin files
Many different filetypes are edited with different options. For example,
when you edit a "c" file, it's very useful to set the 'cindent' option to
automatically indent the lines. These commonly useful option settings are
included with Vim in filetype plugins. You can also add your own, see
|write-filetype-plugin|.
3. Using indent files
When editing programs, the indent of a line can often be computed
automatically. Vim comes with these indent rules for a number of
filetypes. See |:filetype-indent-on| and 'indentexpr'.
autocmd FileType text setlocal textwidth=78
This makes Vim break text to avoid lines getting longer than 78 characters.
But only for files that have been detected to be plain text. There are
actually two parts here. "autocmd FileType text" is an autocommand. This
defines that when the file type is set to "text" the following command is
automatically executed. "setlocal textwidth=78" sets the 'textwidth' option
to 78, but only locally in one file.
*restore-cursor*
autocmd BufReadPost *
\ if line("'\"") > 1 && line("'\"") <= line("$") |
\ exe "normal! g`\"" |
\ endif
Another autocommand. This time it is used after reading any file. The
complicated stuff after it checks if the '"' mark is defined, and jumps to it
if so. The backslash at the start of a line is used to continue the command
from the previous line. That avoids a line getting very long.
See |line-continuation|. This only works in a Vim script file, not when
typing commands at the command-line.
==============================================================================
*05.3* Simple mappings
A mapping enables you to bind a set of Vim commands to a single key. Suppose,
for example, that you need to surround certain words with curly braces. In
other words, you need to change a word such as "amount" into "{amount}". With
the :map command, you can tell Vim that the F5 key does this job. The command
is as follows:
:map <F5> i{<Esc>ea}<Esc>
Note:
When entering this command, you must enter <F5> by typing four
characters. Similarly, <Esc> is not entered by pressing the <Esc>
key, but by typing five characters. Watch out for this difference
when reading the manual!
Let's break this down:
<F5> The F5 function key. This is the trigger key that causes the
command to be executed as the key is pressed.
i{<Esc> Insert the { character. The <Esc> key ends Insert mode.
e Move to the end of the word.
a}<Esc> Append the } to the word.
After you execute the ":map" command, all you have to do to put {} around a
word is to put the cursor on the first character and press F5.
In this example, the trigger is a single key; it can be any string. But when
you use an existing Vim command, that command will no longer be available.
You better avoid that.
One key that can be used with mappings is the backslash. Since you
probably want to define more than one mapping, add another character. You
could map "\p" to add parentheses around a word, and "\c" to add curly braces,
for example:
:map \p i(<Esc>ea)<Esc>
:map \c i{<Esc>ea}<Esc>
You need to type the \ and the p quickly after another, so that Vim knows they
belong together.
The ":map" command (with no arguments) lists your current mappings. At
least the ones for Normal mode. More about mappings in section |40.1|.
==============================================================================
*05.4* Adding a plugin *add-plugin* *plugin*
Vim's functionality can be extended by adding plugins. A plugin is nothing
more than a Vim script file that is loaded automatically when Vim starts. You
can add a plugin very easily by dropping it in your plugin directory.
{not available when Vim was compiled without the |