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prompt.ps1
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prompt.ps1
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. "$(Split-Path $script:MyInvocation.MyCommand.Path)\formatting.ps1"
. "$(Split-Path $script:MyInvocation.MyCommand.Path)\python.ps1"
# Renders a 2 columns layout, with $left argument written to the extreme left of the console, and $right to the extreme
# right. The cursor is restored back to its position thus should not be impacted.
function Write-Layout ($left, $right) {
Write-Host $left -NoNewline
$origX = $Host.UI.RawUI.CursorPosition.X
$origY = $Host.UI.RawUI.CursorPosition.Y
$rightX = $Host.UI.RawUI.WindowSize.Width - (Length-Without-ANSI $right)
$rightY = $Host.UI.RawUI.CursorPosition.Y
$position = New-Object System.Management.Automation.Host.Coordinates $rightX, $rightY
$Host.UI.RawUI.CursorPosition = $position
Write-Host $right -NoNewLine
$position = New-Object System.Management.Automation.Host.Coordinates $origX, $origY
$Host.UI.RawUI.CursorPosition = $position
}
# Get the current directory. If at the root of a drive, the name of the file is returned without the slash, e.g: "C:"
function Current-Directory {
return Split-Path (Get-Location) -Leaf
}
function New-Path($string) {
return (Join-Path -Path $string -ChildPath ".").TrimEnd("\/.")
}
function Safe-Split-Path ($path) {
$safe = New-Path $path
if ($IsWindows) {
return $safe.Split("\")
}
return $safe.Split("/")
}
function Count-Path ($path) {
return (Safe-Split-Path $path).Length
}
# The "main" directory is roughly defined as a contextual directory name that helps understand what the "current
# directory" is. Depending what the current location is, the main directory can be the drive name, the parent directory,
# "Users\Sam", or nothing (in case where the current directory is a drive root).
function Current-Main-Directory {
$fullname = (Get-Location).Path
$split = @(Safe-Split-Path $fullname)
$oneDrivePath = New-Path "${HOME}/OneDrive" # e.g: C:\Users\Sam\OneDrive
if ($IsLinux -and (Test-Path "/mnt/c")) {
# mounted path under WSL
$oneDrivePath = New-Path "/mnt/c/Users/Sam/OneDrive"
}
$count = Count-Path $onedrivePath
# deep in onedrive directory
if ($fullname.StartsWith($oneDrivePath) -and ($split.Length -gt $count + 1)) {
return [string](New-Path ("OneDrive/{0}" -f $split[$count]))
}
# in onedrive directory
if ($fullname.StartsWith($oneDrivePath) -and ($split.Length -eq (Count-Path $oneDrivePath) + 1)) {
return "OneDrive"
}
$count = Count-Path $HOME
# deep in home directory
if ($fullname.StartsWith($HOME) -and ($split.Length -gt $count + 1)) {
return $split[$count]
}
# in home directory
if ($fullname.StartsWith($HOME) -and ($split.Length -eq $count + 1)) {
$parent = Split-Path (Split-Path $HOME -Parent) -Leaf
$leaf = Split-Path $HOME -Leaf
return [string](New-Path ("{0}/{1}" -f $parent, $leaf))
}
# top directory
if ($split.Length -gt 2) {
return Split-Path $fullname -Parent
}
# root level
if (($split.Length -eq 1) -or ($split[-1] -eq "")) {
return ""
}
# default
return $split[0]
}
# Get the current git branch name
function Git-Branch {
$raw = git status --porcelain --branch
$branch = $raw.Split(" ").Split("...")[1]
return $branch
}
# Check if current user is an administrator
function Test-Administrator {
if ($IsLinux -or $IsMacOS) {
return ((id -u) -eq 0)
}
if ($IsWindows) {
$user = [Security.Principal.WindowsIdentity]::GetCurrent()
return ([Security.Principal.WindowsPrincipal] $user).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
}
return ""
}
# ZenMode
$global:ZenMode = [Boolean]::FalseString
function Start-ZenMode {
Clear-Host
$global:ZenMode = [Boolean]::TrueString
Set-PSReadLineKeyHandler -Chord enter -ScriptBlock {
[Microsoft.PowerShell.PSConsoleReadLine]::ClearScreen()
[Microsoft.PowerShell.PSConsoleReadLine]::AcceptLine()
Write-Host "`n`n"
}
}
function Stop-ZenMode {
Clear-Host
$global:ZenMode = [Boolean]::FalseString
Set-PSReadLineKeyHandler -Chord enter -ScriptBlock {
[Microsoft.PowerShell.PSConsoleReadLine]::AcceptLine()
}
}
# Define the command prompt
function prompt {
$lastCommandResult = $?
if ($global:ZenMode -eq [Boolean]::TrueString) {
$left = "{0}`t" -f "`n" * 3
if ($Host.UI.RawUI.CursorPosition.Y -lt 2) {
$left = "`t"
}
$right = " "
if (!$lastCommandResult) {
$right = With-Red "◆"
}
Write-Layout $left $right
return " "
}
$left = ""
$right = ""
# Main and current directory
$mainDir = (Current-Main-Directory)
if ($mainDir -ne "") {
$left += (With-Black $mainDir) + " | "
}
$left += With-Magenta (Current-Directory)
# Git status
$isInGitDir = $(git rev-parse --is-inside-work-tree 2>$null)
if ($isInGitDir) {
$left += " :: " + (With-Magenta (Git-Branch))
}
# Current time
$time = Get-Date -Format "HH:mm:ss"
if ($lastCommandResult) {
$right += " " + (With-Green $time)
}
else {
$right += " " + (With-Red $time)
}
# When admin user
if (Test-Administrator) {
$left = " " + (With-Underline "Admin") + " :: " + $left + " > "
}
else {
$left += " {0} " -f ("$([char]0x25B7)" * ($nestedPromptLevel + 1)) # character ▷. Some nice options: ⪧⫸▷▶♪
}
# Renders the prompt
Write-Layout $left $right
# Python venv
switch (Try-ActivatePython) {
([PythonVenvStatus]::activated) {
$msg = (With-Green "▶") + " Python venv activated"
Write-Host "`n$msg"
prompt
}
([PythonVenvStatus]::deactivated) {
$msg = (With-Yellow "▶") + " Python venv deactivated"
Write-Host "`n$msg"
prompt
}
}
return " "
}