2012-07-19 08:17:32 -04:00
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Liquid prompt -- A useful adaptive Bash prompt
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==============================================
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Liquid prompt is a smart prompt for the "Bourne-Again" Unix shell (bash).
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The basic idea of the liquid prompt is to nicely display useful informations on
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the shell prompt, only when they are needed. It adds carefuly chosen colors to
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draw your attention on what differs from the normal context. Thus, you will
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notice what changes, when it changes, because you do not become accommodated to
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informations that are always displayed in the same way.
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## FEATURES
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If there is nothing special in the current context, the liquid prompt is close
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to a default prompt:
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`[user:~] $ `
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If you have ran one command in background that is still running and that you are
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in a git repository, on branch "myb":
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`1r [user@server:~/liquidprompt] myb ± `
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A liquid prompt displaying everything may look like this:
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`25% 12.5 1s/1r [user@server:~/liquidprompt] master(3) 125 ± `
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It displays:
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* the average of the batteries remaining power, if it is under a given
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2012-07-19 08:23:20 -04:00
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threshold, with a colormap that became more and more noticeable with decreasing
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power;
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2012-07-19 08:17:32 -04:00
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* the average of the processors load, if it is over a given limit, with a
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2012-07-19 08:23:20 -04:00
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colormap too;
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* the number of attached sleeping jobs (when you interrupt a command with
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`Ctrl-Z` and bring it back with `fg`), if there is any;
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2012-07-19 08:17:32 -04:00
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* the number of attached running jobs (commands started with a `&`), if there is
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any;
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* the current user, in bold yellow if it is root;
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* the current host, if you are connected via an SSH or telnet connection, with
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different colors for each case;
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* the current directory in bold;
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* the name of the current branch if you are in a version control repository
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(git, mercurial or subversion), in green if everything is up to date, in red if
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there is changes, in yellow if there is pending commits to push;
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* the number of pending commits, if any;
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* the error code of the last command, if it has failed in some way;
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* a smart mark: ± for VCS directories, $ for simple user, a red # for root.
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## USAGE
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Include the file in your bash configuration, for example in your `.bashrc`:
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`source liquidpromt.bash`
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## PUT THE PROMPT IN A DIFFERENT ORDER
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Most of the display is prepared in the `__set_bash_prompt` function, apart from
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features that needs several colors (such as the load colormap). You can sort
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what you want to see by editing the PS1 variable.
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## KNOWN LIMITATIONS AND BUGS
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* Does not display the number of commits to be pushed in Mercurial repositories.
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* Subversion repository cannot display commits to be pushed, this is a
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limitation of the Subversion versionning model.
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