My PowerShell Profile contains mostly aliases to default Windows cmds and some custom functions I use often.

Profile.ps1

# niktekusho's profile!
# Put this file in ${HOME}\Documents\PowerShell\

# Custom environment vars

# Persist workspace env-var
[System.Environment]::SetEnvironmentVariable('GH_PROJECTS_PATH', "$env:HOME\Documents\Github")

# Custom prompt

function prompt {
    $baseRegexes = @{
        $HOME = '~';
        "${env:GH_PROJECTS_PATH}" = 'gh';
    }

    $currentPath = $executionContext.SessionState.Path.CurrentLocation.Path
    $resolvedPath = $currentPath

    # Replace every key in the baseRegexes dictionary with the associated value (if the base pattern matches)
    foreach ($key in $baseRegexes.Keys) {
        $regex = [regex]::Escape($key) + "(\\.*)*$"
        if ($currentPath -match $regex) {
            $replacement = $baseRegexes[$key]
            $resolvedPath = $($resolvedPath -replace $regex, ($replacement + '$1'))
        }
    }

    # $resolvedPath = $($currentPath -replace $regex, '~$1')

    Write-Host "$ " -NoNewline
    Write-Host "$resolvedPath" -ForegroundColor DarkYellow -NoNewline
    Write-Host " > " -ForegroundColor Red -NoNewline

    return " "
}

# Shortcut to the "WORKSPACES" env var (path)
function Enter-Workspaces {
    if ($env:WORKSPACES) {
        Set-Location $env:WORKSPACES
    }
}

Set-Alias ws Enter-Workspaces

# Shortcut to my GitHub projects

function Enter-GitHubProjects {
    Set-Location $env:GH_PROJECTS_PATH
}

Set-Alias gh Enter-GitHubProjects -Option ReadOnly

# Useful aliases

# Set-Alias mkdir make-dir -Option ReadOnly

# Set-Alias rm del-cli -Option AllScope, ReadOnly

Set-Alias np ${env:windir}\notepad.exe

# Shortcuts to optimize Docker on Windows VM virtual disk

function Invoke-DockerOptimize([String] $mode = "Quick") {
    Write-Output "Running 'Docker Optimize' function in $mode mode."
    return Optimize-VHD -Path "C:\Users\Public\Documents\Hyper-V\Virtual Hard Disks\MobyLinuxVM.vhdx" -Mode $mode
}

# Simple alias of the function above
Set-Alias dockerqopt Invoke-DockerOptimize -Option ReadOnly

# "Alias" of the function above but with "Full" parameter
function dockerfullopt {
    return Invoke-DockerOptimize -mode "Full"
}

# Similar to the time command in UNIX envs. "time" is already taken though...
Set-Alias timeit Measure-Command -Option ReadOnly

# Shortcut to open explorer on current dir

function Open-ExplorerCurrentDir {
    explorer .
}

Set-Alias e Open-ExplorerCurrentDir -Option ReadOnly

# Shortcut to open the PowerShell profile in a text editor

function Open-PSProfileFile {
    # Use Visual Studio Code if it is installed, otherwise fallback to notepad
    if (Get-Command "code" -ErrorAction SilentlyContinue) { 
        code $PROFILE.CurrentUserAllHosts
    } else {
        notepad $PROFILE.CurrentUserAllHosts
    }
}

Set-Alias psprof Open-PSProfileFile -Option ReadOnly

# Unix shell functions

function which($cmd) { (Get-Command $cmd).Definition }

function whoami { "$(Get-Content Env:\USERDOMAIN)/$(Get-Content Env:\USERNAME)" }

function touch($fileName) { Out-File -FilePath "$(Get-Location)/${fileName}" }

# Choco helpers

function Invoke-ChocoUpgradeAll {
    param (
        [switch]$dryRun = $false
    )
    # Run only if choco is installed
    if (Get-Command "choco" -ErrorAction SilentlyContinue) {
        $noop = $null
        if ($dryRun) {
            Write-Output 'Running "choco" in dry-run mode.'
            $noop = '--noop'
        }
        choco upgrade all -y $noop
    } else {
        Write-Warning 'You do not have "choco" installed (or in your $PATH)'
    }
}

Set-Alias chocoup Invoke-ChocoUpgradeAll -Option ReadOnly

# Shortcut to change local user in a git repository
function Invoke-ChangeGitUser([String] $username = "niktekusho", [String] $email = "nicola.dalmaso@outlook.com", [switch] $dryrun = $False) {
    if ($dryrun) {
        Write-Output "Running 'Change Git User' function in dryrun mode."
        Write-Output "git config user.name $username"
        Write-Output "git config user.email $email"
    } else {
        Write-Output "User: $username | Email: $email"
        git config user.name $username
        git config user.email $email
    }
}

# Refresh Path env var in current terminal session
function Refresh-Path() {
    # User before Machine to allow for "user-defined" Path override.
    $env:Path = [System.Environment]::GetEnvironmentVariable("Path","User") + ";" + [System.Environment]::GetEnvironmentVariable("Path","Machine")
}