ReinWD / oh-my-posh

A prompt theming engine for Powershell

oh-my-posh

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Table of Contents

• About
• Prerequisites
• Installation
• Configuration
• Helper functions
• Themes

About

A theme engine for Powershell in ConEmu and Windows Terminal inspired by the work done by Chris Benti on PS-Config and Oh-My-ZSH on OSX and Linux (hence the name).

More information about why I made this can be found on my blog.

Features:

• Easy installation
• Awesome prompt themes for PowerShell in ConEmu
• Git status indications (powered by posh-git)
• Failed command indication
• Admin indication
• Current session indications (admin, failed command, user)
• Configurable
• Easily create your own theme
• Separate settings for oh-my-posh and posh-git
• Does not mess with the default Powershell console

Prerequisites

You should use ConEmu or Windows Terminal to have a brilliant terminal experience on Windows.

You can install ConEmu using Chocolatey:

choco install ConEmu

You can also install it using Scoop via the extras bucket:

$ scoop search conemu
'extras' bucket:
  conemu (18.xx.xx)
$ scoop install conemu

Windows Terminal can be acquired from the Microsoft Store, the Windows Terminal repo, or via Chocolatey:

choco install microsoft-windows-terminal

The fonts I use are Powerline fonts, there is a great repository containing them. I use Meslo LG M Regular for Powerline Nerd Font in my ConEmu setup together with custom colors. You can find my theme here.

In case you notice weird glyphs after installing a font of choice, make sure the glyphs are available (maybe they have a different location in the font, if so, adjust the correct $ThemeSettings icon). If it turns out the character you want is not supported, select a different font.

Installation

You need to use the PowerShell Gallery to install oh-my-posh.

Install posh-git and oh-my-posh:

Install-Module posh-git -Scope CurrentUser
Install-Module oh-my-posh -Scope CurrentUser

Enable the prompt:

# Start the default settings
Set-Prompt
# Alternatively set the desired theme:
Set-Theme Agnoster

In case you're running this on PS Core, make sure to also install version 2.0.0-beta1 of PSReadLine

Install-Module -Name PSReadLine -AllowPrerelease -Scope CurrentUser -Force -SkipPublisherCheck

To enable the engine edit your PowerShell profile:

if (!(Test-Path -Path $PROFILE )) { New-Item -Type File -Path $PROFILE -Force }
notepad $PROFILE

Append the following lines to your PowerShell profile:

Import-Module posh-git
Import-Module oh-my-posh
Set-Theme Paradox

The last command sets the theme for the console. Check the available themes list below.

Configuration

List the current configuration:

$ThemeSettings

You can tweak the settings by manipulating $ThemeSettings. This example allows you to tweak the branch symbol using a unicode character:

$ThemeSettings.GitSymbols.BranchSymbol = [char]::ConvertFromUtf32(0xE0A0)

Also do not forget the Posh-Git settings itself (enable the stash indication for example):

$GitPromptSettings

Hide your username@domain when not in a virtual machine for the Agnoster, Fish, Honukai, Paradox and Sorin themes:

$DefaultUser = 'yourUsernameHere'

Helper functions

Set-Theme: set a theme from the Themes directory. If no match is found, it will not be changed. Autocomplete is available to list and complete available themes.

Set-Theme paradox

Show-ThemeColors: display the colors used by the theme

Show-Colors: display colors configured in ConEmu

Themes

Agnoster

Paradox

Sorin

Darkblood

Avit

Honukai

Fish

Robbyrussell

Pararussel

Material

Star

Zash

Lambda

Emodipt

Creating your own theme

If you want to create a theme it can be done rather easily by adding a mytheme.psm1 file in the folder indicated in $ThemeSettings.MyThemesLocation (the folder defaults to ~\Documents\WindowsPowerShell\PoshThemes, feel free to change it).

The only required function is Write-Theme. You can use the following template to get started:

#requires -Version 2 -Modules posh-git

function Write-Theme
{
    param(
        [bool]
        $lastCommandFailed,
        [string]
        $with
    )

    # enter your prompt building logic here
}

$sl = $global:ThemeSettings #local settings

Feel free to use the public helper functions Get-VCSStatus, Get-VcsInfo, Get-FormattedRootLocation, Get-ShortPath, Set-CursorForRightBlockWrite, Set-CursorUp, Set-Newline or add your own logic completely.

To test the output in ConEmu, just switch to your theme:

Set-Theme mytheme

If you want to include your theme in oh-my-posh, send me a PR and I'll try to give feedback ASAP.

Happy theming!

Adding stack count to a custom theme

As it seems getting access to the stack information when using pushd/popd is sort of mission impossible from within a theme, you can use a workaround proposed by Jonathan Leech-Pepin. In your $PROFILE, add a variable that will act as a correctly scoped pointer to fetch the stack context:

$getStackContext = {Get-Location -Stack}

Next, in your custom theme, access the information you want to display:

$stackCount = (&$getStackContext).count

iTerm2 is creating notifications every time

This is caused by the ConsoleTitle functionality. As explained by Andrew Stanton-Nurse it's linked to how terminals work with OSC codes. The fix is to disable the ConsoleTitle functionality when in iTerm2 by adding the following snippet to your $PROFILE.

if($env:LC_TERMINAL -eq "iTerm2") {
    $ThemeSettings.Options.ConsoleTitle = $false
}

Based on work by

• Chris Benti
• Keith Dahlby