// This is raw asciidoc file. The HTML rendered page is http://volnitsky.com/project/git-prompt
= GIT Prompt
:v-p: http://volnitsky.com/project
:compact-option: compact
== Basic Usage
image:screenshot-prompt-basic.png[basic usage]
Digit [red]*1* on 3rd line is `false(1)` exit code. Also on non-zero exit code
terminal bell is sounded. Bell is turnned off by default because most people don't
know how to set softer bell (`setterm` is your friend).
== GIT
Branch and files are colored according to state. "M" stands for master.
image:screenshot-prompt-git.png[git module screenshot]
.Branch and Files Colors
[cols="^3,^3,12",frame="topbot",options="header"]
|================================================================
| *Branch* | *File* | *Meaning*
| [darkblue]#dark blue# | | Clean repo
| [green]#green# | [green]#green# | Modified or new file. Modifications are in index but not in repo yet.
| [#cc0000]#dark red# | [#cc0000]#dark red# | Modified and tracked by repo, but modifications not added to index yet.
| [blue]#light blue# | [blue]#light blue# | Untracked file.
| [red]#light red# | | Detached Head
| [magenta]#magenta# | | In middle of doing something
|================================================================
== Subversion/SVN
image:screenshot-svn.png[svn module screenshot]
SVN module disabled by default because even on moderate sized working
directories there is noticeable delay for prompt display. SVN is slower than
GIT. Enable if needed in <<config,config>>
== Mercurial/HG
Was recently added thanks to Lee Nussbaum <wln@scrunch.org>.
== Labels
Labels are visual cues to help figure out what terminal is running what command.
It is generalization of xterm-title but differ from xterm-title that it
can be displayed in other places (on Screen(1) windows titles for example).
Also label can display currently executed command (when bash prompt obviously
is not displayed).
On screenshot below labels are in red ovals.
image:screenshot-labels.png["labels screenshot", width="300", link="screenshot-labels.png"]
The `screen(1)` status line at bottom of smaller gnome-terminal is displayed with
following line in `~/.screenrc`:
---------
caption always "%{= kw}%-w%{= bw}%n %t%{-}%+w %-= @%H - %LD %d %LM - %c"
---------
//////////////////
We don't need to do any thing for something like `cd` or `ssh` (if you have
git-prompt on remote host).
For external command we need set label before it is executed.
It would be simple if `bash` set command name to some variable before execution,
but it does not do this. So we have to use wrappers. This is not very elegant
and will work only for commands with defined wrapper.
I use wrapper only for `vim` and `man` in my `~/.bashrc`
-------------------------
vi() { set_shell_title "vi $@"; /usr/bin/vim -p "$@"; }; export -f vi
man() { set_shell_title "man $@"; /usr/bin/man "$@"; }; export -f man
----------------------------
Note that vim sets xterm title , but we still use wrapper so that
`screen` will have labels too.
Function `set_shell_title` defined in `git-prompt.sh`.
///////////////////
== Install
Download link:git-prompt.sh[] or get it with GIT:
------------------
git clone git://github.com/lvv/git-prompt.git
---------------
Put following command in your profile (`~/.bash_profile` or `~/.profile`) in interactive section:
---------------------
. /path/to/git-prompt.sh
---------------------
If there are no interactivity test in your profile or you don't know what it
is, then above command should be:
--------------------
[[ $- == *i* ]] && . /path/to/git-prompt.sh
---------------------
There might be your old prompt defined too. You need to comment it out.
Some distros also have `/etc/bashrc` or `/etc/bash/bashrc` with distro default
prompt.
== Config
[[config]]
Is optional. If config file is not found then git-prompt uses defaults.
Defaults are listed in example `git-prompt.conf`. Git-prompt looks (in listed order)
for config file in following locations:
* `/etc/git-prompt.conf`
* `~/.git-prompt.conf`
Copy example config `git-prompt.conf`
to any of above locations and customize as needed.
== Limitations
* cd-ing into something like linux kernel git working directory for the 1st
time (with cold cache) might take up to 10 seconds (that is how long `git status` executes).
* Because you will be always reminded about not checked-in files,
it will force you to keep working directory clean, better maintain `.gitignore` and commit more often.
* This prompt is most useful if your screen have enough width.
If this is not the case, you might want to disable file list display (`max_file_list_length=0`).
* When prompt is longer then screen-width it wraps to second line.
Because of bug in `gnome-terminal` (or `readline` ?) some color escape codes can be visible on second line.
I've reported gnome-terminal bug. Again, you can disable file list display or limit length (`max_file_list_length`).
* By default some terminals display ascii color with maximum color saturation
which makes colored text of different perceptual brightness. This makes it hard to read.
If your terminal colors are configurable, try change it to softer (pastel)
colors.
== DEPENDENCY
Most of not optional dependencies are probably already installed on your host.
* bash (tested with v3.2.33)
* sed
* tput (terminfo)
* tty (core utils)
* grep
* locale (glibc)
* id (core utils)
* git (optional)
* svn (optional)
* hg (optional)
== TODO
* VCS exclude dir list
* new mail (howto at: `http://kikhome.net/?p=11` )
* ctrl-Z subshell indicator
* VIM module needs to be moved out of GIT module
* make module (to show generated, stale files)
* How detect current merge? (current method through .git/MERGE_HEAD not always works)
include::../volnitsky.com/project/howto-submit-patch.txt[]
