367 lines
16 KiB
Markdown
367 lines
16 KiB
Markdown
Liquid Prompt — a useful adaptive prompt for Bash & zsh
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=======================================================
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Liquid Prompt gives you a nicely displayed prompt with useful information
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when you need it. It shows you what you need when you need it.
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You will notice what changes *when* it changes, saving time and frustration.
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You can even use it with your favorite shell – Bash or zsh.
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## Features
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If there is nothing special about the current context, the appearance of Liquid
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Prompt is similar to that of a default prompt:
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`[user:~] $ `
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If you are running a background command and are also in the "myb" branch
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of a Git repository on a server:
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`1r [user@server:~/liquidprompt] myb ± `
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When Liquid Prompt is displaying everything (a rare event!), it may look like this:
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`code 🕤 ⌁24% ⌂42% 3d/2&/1z [user@server:~/ … /code/liquidprompt][pyenv]↥ master(+10/-5,3)*+ 125 ± `
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Here is an overview of what Liquid Prompt is capable of displaying:
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* a tag associated to the current shell session (you can easily add any
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prefix tag to your prompt by invoking `prompt_tag MYTAG`)
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* the current time, displayed as either numeric values or as an analog clock
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* the current battery status:
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* a green `⏚` if charging, above the given threshold, but not charged
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* a yellow `⏚` if charging and under the given threshold
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* a yellow `⌁` if discharging but above the given threshold
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* a red `⌁` if discharging and under the given threshold
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* the remaining battery power if it is under the given threshold, displayed with
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an increasingly red color map as remaining power decreases
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* the average of the processors load if it is over a given limit, displayed with
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an intensity color map as load increases
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* the average temperature of the available system sensors (generally CPU and MB)
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* the number of detached sessions (`screen` or `tmux`)
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* the number of attached sleeping jobs (when you interrupt a command with Ctrl-Z
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and bring it back with `fg`)
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* the number of attached running jobs (commands started with a `&`)
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* a pair of square brackets, in blue if your current shell is running in a
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terminal multiplexer (`screen` or `tmux`)
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* the current user, in bold yellow if it is root and in light white if it is not
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the same as the login user
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* a green `@` if the connection has X11 support; a yellow one if not
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* the current host – in bold red if you are connected via a `telnet` connection
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and blue (or other unique colors) if connected via SSH
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* a green colon if the user has write permissions in the current directory and
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a red one if not
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* the current directory in bold, shortened if it takes too much space while always
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preserving the first two directory names
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* the current Python virtual environment
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* an up arrow if an HTTP proxy is in use
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* the name of the current branch if you are in a version control repository
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(Git, Mercurial, Subversion, Bazaar, or Fossil):
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* in green if everything is up-to-date
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* in red if there are changes
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* in yellow if there are pending commits to push
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* the number of added/deleted lines if changes have been made and the
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number of pending commits
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* a yellow `+` if there are stashed modifications
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* a red `*` if there are untracked files in the repository
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* the runtime of the last command, if it has exceeded a certain threshold
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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 at the end of the prompt:
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* `±` for Git
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* `☿` for Mercurial
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* `‡` for Subversion
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* `‡±` for Git-Subversion
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* `⌘` for Fossil
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* `$` or `%` for a simple user
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* a red `#` for the root user
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* if desired, the prompt will be replicated in your terminal window's
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title (without the colors)
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You can temporarily deactivate Liquid Prompt and revert to your previous prompt
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by typing `prompt_off`. Use `prompt_on` to bring it back. You can disable
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*all* prompts and simply use a single mark sign (`$ ` for user and `# ` for root)
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by using the `prompt_OFF` command.
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## Test Drive and Installation
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Installation is simple. The basic dependencies are standard Unix utilities/commands.
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If you experience some problems during the installation, please check that they
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are met; see the [dependencies](#dependencies) section for what you need specifically.
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Follow these steps:
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cd
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git clone https://github.com/nojhan/liquidprompt.git
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source liquidprompt/liquidprompt
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To use it every time you start a shell, add the following lines to your
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`.bashrc` (if you use Bash) or `.zshrc` (if you use zsh):
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# Only load Liquid Prompt in interactive shells, not from a script or from scp
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[[ $- = *i* ]] && source ~/liquidprompt/liquidprompt
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Next up is the configuration; you can skip this step if you like the defaults:
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cp ~/liquidprompt/liquidpromptrc-dist ~/.config/liquidpromptrc
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You can also copy the file to `~/.liquidpromptrc`.
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Use your favorite text editor to change the defaults.
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The `liquidpromptrc` file is richly commented and easy to set your own defaults.
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You can even theme Liquid Prompt and use a custom PS1 prompt. This is explained
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in the sections below.
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Check in your `.bashrc` that the `PROMPT_COMMAND` variable is not set, or else
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the prompt will not be available.
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### Installation via Antigen
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To install via antigen, simply add the following line in your `.zshrc` after activating antigen:
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antigen bundle nojhan/liquidprompt
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## Dependencies
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Apart from obvious ones, some features depend on specific commands. If you do
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not install them, the corresponding feature will not be available, but no error
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will be displayed.
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* Battery status requires `acpi` on GNU/Linux.
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* Temperature status requires `acpi` or `lm-sensors` on GNU/Linux.
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* Detached session status looks for `screen` and/or `tmux`.
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* VCS support features require `git`, `hg`, `svn`, `bzr` or `fossil`, but you
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probably already knew that.
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For other features, the script uses commands that should be available on a large
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variety of Unix systems: `tput`, `grep`, `awk`, `sed`, `ps`, `who`, and `expr`.
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## Feature Configuration
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You can configure some variables in the `~/.config/liquidpromptrc` file:
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* `LP_BATTERY_THRESHOLD`, the maximal value under which the battery level is displayed
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* `LP_LOAD_THRESHOLD`, the minimal value after which the load average is displayed
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* `LP_TEMP_THRESHOLD`, the minimal value after which the average temperature is displayed
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* `LP_RUNTIME_THRESHOLD`, the minimal value after which the runtime is displayed
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* `LP_PATH_LENGTH`, the maximum percentage of the screen width used to display the path
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* `LP_PATH_KEEP`, how many directories to keep at the beginning of a shortened path
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* `LP_HOSTNAME_ALWAYS`, a choice between always displaying the hostname or
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showing it only when connected via a remote shell
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* `LP_USER_ALWAYS`, a choice between always displaying the user or showing
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it only when he is different from the one that logged in
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You can also force some features to be disabled, to save some time in the
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prompt-building process:
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* `LP_ENABLE_PERM`, if you want to detect if the directory is writeable
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* `LP_ENABLE_SHORTEN_PATH`, if you want to shorten the path display
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* `LP_ENABLE_PROXY`, if you want to detect if a proxy is used
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* `LP_ENABLE_JOBS`, if you want to have jobs information
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* `LP_ENABLE_LOAD`, if you want to have load information
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* `LP_ENABLE_BATT`, if you want to have battery information
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* `LP_ENABLE_GIT`, if you want to have Git information
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* `LP_ENABLE_SVN`, if you want to have Subversion information
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* `LP_ENABLE_HG`, if you want to have Mercurial information
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* `LP_ENABLE_BZR`, if you want to have Bazaar information
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* `LP_ENABLE_FOSSIL`, if you want to have Fossil information
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* `LP_ENABLE_VCS_ROOT`, if you want to show VCS informations with root account
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* `LP_ENABLE_TITLE`, if you want to use the prompt as your terminal window's title
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* `LP_ENABLE_SCREEN_TITLE`, if you want to use the prompt as your screen window's title
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* `LP_ENABLE_SSH_COLORS`, if you want different colors for hosts you SSH into
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* `LP_ENABLE_RUNTIME`, if you want to display the runtime of the last command
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* `LP_ENABLE_SUDO`, if you want the prompt mark to change color while you have password-less root access
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* `LP_ENABLE_FQDN`, if you want the display of the fully qualified domain name
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* `LP_ENABLE_TIME`, if you want to display the time at which the prompt was shown
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* `LP_TIME_ANALOG`, if you want to show the time using an analog clock instead of numeric values
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Note that if required commands are not installed, enabling the corresponding
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feature will have no effect. Also, all the `LP_ENABLE_…` variables override the
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templates; i.e. if you use `$LP_BATT` in your template and you set `LP_ENABLE_BATT=0`
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in your configuration file, your prompt will not have any battery information.
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If you are using Bash and want to use the `PROMPT_DIRTRIM` built-in
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functionality to shorten but still want to have Liquid Prompt calculating the
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number of directories to keep in the path, precise a value for `PROMPT_DIRTRIM`
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before sourcing Liquid Prompt and it will override this value with one fitting
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the width of your terminal.
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You may face performances decrease when using VCS located in remote directories.
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To avoid this, you can set the `LP_DISABLED_VCS_PATH` variable to a list of
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absolute colon-separated paths where VCS-related features should be disabled.
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## Customizing the Prompt
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### Adding a Prefix/Postfix
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You can prefix the `LP_PS1` variable with anything you want using
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`LP_PS1_PREFIX`. The following example activate a custom window's title:
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LP_PS1_PREFIX="\[\e]0;\u@\h: \w\a\]"
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To postfix the prompt, use the `LP_PS1_POSTFIX` variable. For example, to add a
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newline and a single character:
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LP_PS1_POSTFIX="\n>"
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Note: the `prompt_tag` function is a convenient way to add a prefix. You can use
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it to add a keyword to each of your different terminals:
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[:~/code/liquidprompt] develop ± prompt_tag mycode
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mycode [:~/code/liquidprompt] develop ±
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### Rearranging the Prompt
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You can sort what you want to see by sourcing your favorite template file
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(`*.ps1`) in the configuration file.
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You can start from the `liquid.ps1` file, which show the default settings.
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To use your own configuration, just set `LP_PS1_FILE` to your own file path in
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your `~/.liquidpromptrc` and you're done.
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Those scripts basically export the `LP_PS1` variable, by appending features and
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theme colors.
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Available features:
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* `LP_BATT` battery
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* `LP_LOAD` load
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* `LP_TEMP` temperature
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* `LP_JOBS` detached `screen` or `tmux` sessions/running jobs/suspended jobs
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* `LP_USER` user
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* `LP_HOST` hostname
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* `LP_PERM` a colon (`:`)
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* `LP_PWD` current working directory
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* `LP_PROXY` HTTP proxy
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* `LP_VCS` informations concerning the current working repository
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* `LP_ERR` last error code
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* `LP_MARK` prompt mark
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* `LP_TITLE` the prompt as a window's title escaped sequences
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* LP_TTYN the terminal basename
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* `LP_BRACKET_OPEN` and `LP_BRACKET_CLOSE`, brackets enclosing the user+path part
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For example, if you just want to have a prompt displaying the user and the
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host, with a normal full path in blue and Git support only:
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export LP_PS1=`echo -ne "[\${LP_USER}\${LP_HOST}:\${BLUE}\$(pwd)\${NO_COL}] \${LP_GIT} \\\$ "`
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Note that you need to properly escape dollar signs in a string that will be
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interpreted by Bash at each prompt.
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To erase your new formatting, just bind `LP_PS1` to a null string:
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export LP_PS1=""
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## Themes
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You can change the colors and special characters of some parts of Liquid Prompt
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by sourcing your favorite theme file (`*.theme`) in the configuration file. See
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[`liquid.theme`](liquid.theme) for an example of the default Liquid Prompt theme.
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### Colors
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The available colours available for use are:
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`BOLD`, `BLACK`, `BOLD_GRAY`, `WHITE`, `BOLD_WHITE`, `GREEN`, `BOLD_GREEN`,
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`YELLOW`, `BOLD_YELLOW`, `BLUE`, `BOLD_BLUE`, `PINK`, `CYAN`, `BOLD_CYAN,`,
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`RED`, `BOLD_RED`, `WARN_RED`, `CRIT_RED`, `DANGER_RED`, and `NO_COL`.
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Set the variable to a null string (`""`) if you do not want color.
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* Current working directory
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* `LP_COLOR_PATH` as normal user
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* `LP_COLOR_PATH_ROOT` as root
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* Color of the proxy mark
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* `LP_COLOR_PROXY`
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* Jobs count
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* `LP_COLOR_JOB_D` Detached (`screen` / `tmux` sessions without attached clients)
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* `LP_COLOR_JOB_R` Running (`xterm &`)
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* `LP_COLOR_JOB_Z` Sleeping (Ctrl-Z)
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* `LP_COLOR_IN_MULTIPLEXER` currently running in a terminal multiplexer
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* Last error code
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* `LP_COLOR_ERR`
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* Prompt mark
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* `LP_COLOR_MARK` as user
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* `LP_COLOR_MARK_ROOT` as root
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* `LP_COLOR_MARK_SUDO` when you did `sudo` and your credentials are still cached (use `sudo -K` to revoke them)
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* `LP_MARK_PREFIX="\n"` put the prompt on the second line
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* Current user
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* `LP_COLOR_USER_LOGGED` user who logged in
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* `LP_COLOR_USER_ALT` user but not the one who logged in
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* `LP_COLOR_USER_ROOT` root
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* Hostname
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* `LP_COLOR_HOST` local host
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* `LP_COLOR_SSH` connected via SSH
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* `LP_COLOR_TELNET` connected via `telnet`
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* `LP_COLOR_X11_ON` connected with X11 support
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* `LP_COLOR_X11_OFF` connected without X11 support
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* Separation mark (by default, the colon before the path)
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* `LP_COLOR_WRITE` have write permission
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* `LP_COLOR_NOWRITE` do not have write permission
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* VCS
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* `LP_COLOR_UP` repository is up-to-date / a push has been made
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* `LP_COLOR_COMMITS` some commits have not been pushed
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* `LP_COLOR_CHANGES` there are some changes to commit
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* `LP_COLOR_DIFF` number of lines or files impacted by current changes
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* Battery
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* `LP_COLOR_CHARGING_ABOVE` charging and above threshold
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* `LP_COLOR_CHARGING_UNDER` charging but under threshold
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* `LP_COLOR_DISCHARGING_ABOVE` discharging but above threshold
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* `LP_COLOR_DISCHARGING_UNDER` discharging and under threshold
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### Special Characters
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* `LP_MARK_DEFAULT` (default: "") the mark you want at the end of your prompt
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(leave empty to use your shell's default mark)
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* `LP_MARK_BATTERY` (default: "⌁") in front of the battery charge
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* `LP_MARK_ADAPTER` (default: "⏚") displayed when plugged-in
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* `LP_MARK_LOAD` (default: "⌂") in front of the load
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* `LP_MARK_PROXY` (default: "↥") indicate a proxy in use
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* `LP_MARK_HG` (default: "☿") prompt mark in Mercurial repositories
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* `LP_MARK_SVN` (default: "‡") prompt mark in Subversion repositories
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* `LP_MARK_GIT` (default: "±") prompt mark in Git repositories
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* `LP_MARK_FOSSIL` (default: "⌘") prompt mark in Fossil repositories
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* `LP_MARK_BZR` (default: "⚯") prompt mark in Bazaar repositories
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* `LP_MARK_DISABLED` (default: "⌀") prompt mark in disabled repositories
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(see `LP_DISABLED_VCS_PATH`)
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* `LP_MARK_UNTRACKED` (default: "\*") if Git has untracked files
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* `LP_MARK_STASH` (default: "+") if Git has stashed modifications
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* `LP_MARK_BRACKET_OPEN` (default: "[") marks around the main part of the prompt
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* `LP_MARK_BRACKET_CLOSE` (default: "]") marks around the main part of the prompt
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* `LP_TITLE_OPEN` (default: "\e]0;") escape character opening a window's title
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* `LP_TITLE_CLOSE` (default: "\a") escape character closing a window's title
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## Known Limitations and Bugs
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Liquid Prompt is distributed under the [GNU Affero General Public License
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version 3](LICENSE).
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* Does not display the number of commits to be pushed in Mercurial repositories.
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* Browsing very large Subversion repositories may dramatically slow down
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the display of Liquid Prompt (use `LP_DISABLED_VCS_PATH` to avoid that).
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* Subversion repositories cannot display commits to be pushed because
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that's not how Subversion works
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* The proxy detection only uses the `$http_proxy` environment variable.
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* The window's title escape sequence may not work properly on some terminals
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(like `xterm-256`).
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* The analog clock requires a Unicode-aware terminal and at least a
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sufficiently complete font on your system. The [Symbola](http://users.teilar.gr/~g1951d/)
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font, designed by Georges Douros, is known to work well. On Debian or Ubuntu
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install try the `fonts-symbola` or `ttf-ancient-fonts` package.
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## Authors
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Current Maintainer: [](https://coderwall.com/dolmen)
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Original Author: [](https://coderwall.com/nojhan)
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And many contributors!
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