A Powerline style prompt for your shell

A Powerline like prompt for Bash, ZSH and Fish. Based on Powerline-Shell by @banga. Ported to golang by @justjanne.

Shows some important details about the git/hg branch (see below)
Changes color if the last command exited with a failure code
If you're too deep into a directory tree, shortens the displayed path with an ellipsis
Shows the current Python virtualenv environment
It's easy to customize and extend. See below for details.

Table of Contents

Version Control
Installation
Customization
License

Version Control

All of the version control systems supported by powerline shell give you a quick look into the state of your repo:

The current branch is displayed and changes background color when the branch is dirty.
When the local branch differs from the remote, the difference in number of commits is shown along with ⇡ or ⇣ indicating whether a git push or pull is pending

In addition, git has a few extra symbols:

✎ -- a file has been modified, but not staged for commit
✔ -- a file is staged for commit
✼ -- a file has conflicts
+ -- untracked files are present

Each of these will have a number next to it if more than one file matches.

Installation

powerline-go uses ANSI color codes, these should nowadays work everywhere, but you may have to set your $TERM to xterm-256color for it to work.

If you want to use the "patched" mode (which is the default, and provides improved UI), you'll need to install a powerline font, either as fallback, or by patching the font you use for your terminal: see powerline-fonts.
Alternatively you can use "compatible" or "flat" mode.

Precompiled Binaries

I provide precompiled binaries for x64 Linux and macOS in the releases tab

Other Platforms

Install (and update) the package with

go get -u github.com/justjanne/powerline-go

By default it will be in ~/go/bin, if you want to change that, you can set your $GOPATH and/or $GOBIN, but will need to change the path in the following scripts, too.

Bash

Add the following to your .bashrc (or .profile on Mac):

function _update_ps1() {
    PS1="$(~/go/bin/powerline-go -error $?)"
}

if [ "$TERM" != "linux" ]; then
    PROMPT_COMMAND="_update_ps1; $PROMPT_COMMAND"
fi

ZSH

Add the following to your .zshrc:

function powerline_precmd() {
    PS1="$(~/go/bin/powerline-go -error $? -shell zsh)"
}

function install_powerline_precmd() {
  for s in "${precmd_functions[@]}"; do
    if [ "$s" = "powerline_precmd" ]; then
      return
    fi
  done
  precmd_functions+=(powerline_precmd)
}

if [ "$TERM" != "linux" ]; then
    install_powerline_precmd
fi

Fish

Redefine fish_prompt in ~/.config/fish/config.fish:

function fish_prompt
    ~/go/bin/powerline-go -error $status -shell bare
end

Customization

There are a few optional arguments which can be seen by running powerline-go -help. These can be used by changing the command you have set in your shell’s init file.

Usage of powerline-go:
  -colorize-hostname
    	 Colorize the hostname based on a hash of itself
  -cwd-max-depth int
    	 Maximum number of directories to show in path
    	 (default 5)
  -cwd-max-dir-size int
    	 Maximum number of letters displayed for each directory in the path
    	 (default -1)
  -cwd-mode string
    	 How to display the current directory
    	 (valid choices: fancy, plain, dironly)
    	 (default "fancy")
  -east-asian-width
    	 Use East Asian Ambiguous Widths
  -error int
    	 Exit code of previously executed command
  -ignore-repos string
    	 A list of git repos to ignore. Separate with ','
    	 Repos are identified by their root directory.
  -max-width int
    	 Maximum width of the shell that the prompt may use, in percent. Setting this to 0 disables the shrinking subsystem.
    	 (default 50)
  -mode string
    	 The characters used to make separators between segments.
    	 (valid choices: patched, compatible, flat)
    	 (default "patched")
  -modules string
    	 The list of modules to load, separated by ','
    	 (valid choices: aws, cwd, docker, dotenv, exit, git, gitlite, hg, host, jobs, perlbrew, perms, root, ssh, time, user, venv)
    	 (default "venv,user,host,ssh,cwd,perms,git,hg,jobs,exit,root")
  -newline
    	 Show the prompt on a new line
  -priority string
    	 Segments sorted by priority, if not enough space exists, the least priorized segments are removed first. Separate with ','
    	 (valid choices: aws, cwd, cwd-path, docker, exit, git-branch, git-status, hg, host, jobs, perlbrew, perms, root, ssh, time, user, venv)
    	 (default "root,cwd,user,host,ssh,perms,git-branch,git-status,hg,jobs,exit,cwd-path")
  -shell string
    	 Set this to your shell type
    	 (valid choices: bare, bash, zsh)
    	 (default "bash")
  -shorten-gke-names
    	 Shortens names for GKE Kube clusters.
  -theme string
    	 Set this to the theme you want to use
    	 (valid choices: default, low-contrast)
    	 (default "default")
  -truncate-segment-width int
    	 Minimum width of a segment, segments longer than this will be shortened if space is limited. Setting this to 0 disables it.
    	 (default 16)

License

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

mikewaters/powerline-go