PowerLine like prompt for PowerShell

prompt.ps1

$script:bg    = [Console]::BackgroundColor;
$script:first = $true;
$script:last  = 0;
Import-Module Posh-Git

$BranchBehindAndAheadStatusForegroundColor = [System.ConsoleColor]::Magenta
$BranchBehindStatusForegroundColor = [System.ConsoleColor]::Yellow
$BranchAheadStatusForegroundColor = [System.ConsoleColor]::Green
$BranchIdenticalStatusToForegroundColor = [System.ConsoleColor]::White
$workingAdded =  '+'
$workingRemoved =  '-'
$workingModified =  '~'
$workingUnmerged = ''
$BranchUntrackedSymbol = ''
$BeforeText = ''
$BranchAheadStatusSymbol  = ''#''
$BranchBehindStatusSymbol = ''#''
$BranchBehindAndAheadStatusSymbol = '' #"$BranchBehindStatusSymbol$BranchAheadStatusSymbol"
$BranchIdenticalStatusToSymbol = ''



function Write-PromptFancyEnd {
    Write-Host  -NoNewline -ForegroundColor $script:bg

    $script:bg = [System.ConsoleColor]::Black
}

function Write-PromptSegment {
    param(
        [Parameter(
            Position=0,
            Mandatory=$true,
            ValueFromPipeline=$true,
            ValueFromPipelineByPropertyName=$true
        )][string]$Text,

        [Parameter(Position=1)][System.ConsoleColor] $Background = [Console]::BackgroundColor,
        [Parameter(Position=2)][System.ConsoleColor] $Foreground = [System.ConsoleColor]::White,
        [switch]$SameSegment
    )
    if(-not $SameSegment){
        if(!$script:first) {
            Write-Host  -NoNewline -BackgroundColor $Background -ForegroundColor $script:bg
        } else {
            $script:first = $false
        }
    }

    Write-Host $text -NoNewline -BackgroundColor $Background -ForegroundColor $Foreground

    $script:bg = $background;
}

function Get-FancyDir {
    return $(Get-Location).ToString().Replace($env:USERPROFILE, '~').Replace('\', '  ');
}

function Write-PromptStatus {
    if($script:last) {
        Write-PromptSegment ' ✔ ' Green Black
    } else {
        Write-PromptSegment " ✖ $lastexitcode " Red White
    }
}

function Write-PromptUser {
    if($global:admin) {
        Write-PromptSegment ' # ADMIN ' Magenta White;
    } else {
        Write-PromptSegment " $env:USERNAME " Yellow Black;
    }
}

function Write-PromptVirtualEnv {
    if($env:VIRTUAL_ENV) {
        Write-PromptSegment " $(split-path $env:VIRTUAL_ENV -leaf) " Cyan Black
    }
}

function Write-PromptDir {
    Write-PromptSegment " $(Get-FancyDir) " DarkGray White
}

# Depends on posh-git
# Depends on posh-git
function Write-PromptGit {
    $Private:Status = Get-GitStatus
    if($Private:Status) {
        $branchStatusSymbol          = $null
        $branchStatusBackgroundColor = [System.ConsoleColor]::Blue # [Console]::BackgroundColor,
        $branchStatusForegroundColor = [System.ConsoleColor]::White
        $branchForegroundColor = [System.ConsoleColor]::White

        if (-not $Private:status.Upstream) {
                $branchStatusSymbol  = $s.BranchUntrackedSymbol
            } elseif ($Private:status.BehindBy -eq 0 -and $status.AheadBy -eq 0) {
                # We are aligned with remote
                $branchStatusSymbol          = $BranchIdenticalStatusToSymbol
                #$branchStatusBackgroundColor = $BranchIdenticalStatusToBackgroundColor
                $branchStatusForegroundColor = $BranchIdenticalStatusToForegroundColor
            } elseif ($Private:status.BehindBy -ge 1 -and $status.AheadBy -ge 1) {
                # We are both behind and ahead of remote
                $branchStatusSymbol          = $BranchBehindAndAheadStatusSymbol
                #$branchStatusBackgroundColor = $s.BranchBehindAndAheadStatusBackgroundColor
                $branchStatusForegroundColor = $BranchBehindAndAheadStatusForegroundColor
            } elseif ($Private:status.BehindBy -ge 1) {
                # We are behind remote
                #$branchStatusSymbol          = $BranchBehindStatusSymbol
                #$branchStatusBackgroundColor = $s.BranchBehindStatusBackgroundColor
                $branchStatusForegroundColor =$BranchBehindStatusForegroundColor 
            } elseif ($Private:status.AheadBy -ge 1) {
                # We are ahead of remote
                $branchStatusSymbol          = $BranchAheadStatusSymbol
                #$branchStatusBackgroundColor = $s.BranchAheadStatusBackgroundColor
                $branchStatusForegroundColor = $BranchAheadStatusForegroundColor
            }

        $working = " "
        if($Private:Status.HasWorking){
            if($Private:status.Working.Added){
                $working  += "$($workingAdded )$($Private:status.Working.Added.Count)"
            }
            if($Private:status.Working.Modified){
                $working  +="$($workingModified )$($Private:status.Working.Modified.Count)"
            }
            if($Private:status.Working.Removed){
                $working  +="$($workingRemoved)$($Private:status.Working.Removed.Count)"
            }
            if($Private:status.Working.Unmerged){
                $working  +="$($workingUnmerged)$($Private:status.Working.Unmerged.Count)"
            }
        
        }
            $BranchStatus = ($BeforeText + $branchStatusSymbol)
            Write-PromptSegment $BranchStatus $branchStatusBackgroundColor $branchStatusForegroundColor 
            Write-PromptSegment (" $($Private:Status.Branch)") $branchStatusBackgroundColor $branchForegroundColor  -SameSegment
            #Write-Host "  $($Private:Status.Branch) $branchStatusSymbol " -BackgroundColor Blue $branchStatusForegroundColor 
            Write-PromptSegment $working  $branchStatusBackgroundColor $branchStatusForegroundColor -SameSegment
    }
}

function prompt {
    $script:last  = $?;
    $script:first = $true;

    Write-PromptStatus
    Write-PromptUser
    Write-PromptVirtualEnv
    Write-PromptDir
    Write-PromptGit

    Write-PromptFancyEnd

    return ' '
}

When running the script on Win7 with Powershell 5.0 i get:

At C:\Users\pfeiffer.stefan\Downloads\86023bfad2bdd84d8b1a-e0e76833d142fd6958f1d7f46ef7c2c1c3699288\prompt.ps1:33 char:1
+ }
+ ~
Unexpected token '}' in expression or statement.
At C:\Users\pfeiffer.stefan\Downloads\86023bfad2bdd84d8b1a-e0e76833d142fd6958f1d7f46ef7c2c1c3699288\prompt.ps1:36 char:87
+ ... ion).ToString().Replace($env:USERPROFILE, '~').Replace('\', '  ');
+                                                                     ~
Missing ')' in method call.
At C:\Users\pfeiffer.stefan\Downloads\86023bfad2bdd84d8b1a-e0e76833d142fd6958f1d7f46ef7c2c1c3699288\prompt.ps1:36 char:87
+ ... ion).ToString().Replace($env:USERPROFILE, '~').Replace('\', '  ');
+                                                                     ~
Unexpected token '±' in expression or statement.
At C:\Users\pfeiffer.stefan\Downloads\86023bfad2bdd84d8b1a-e0e76833d142fd6958f1d7f46ef7c2c1c3699288\prompt.ps1:93 char:14
+     return ' '
+              ~
The string is missing the terminator: '.
At C:\Users\pfeiffer.stefan\Downloads\86023bfad2bdd84d8b1a-e0e76833d142fd6958f1d7f46ef7c2c1c3699288\prompt.ps1:35 char:23
+ function Get-FancyDir {
+                       ~
Missing closing '}' in statement block or type definition.
    + CategoryInfo          : ParserError: (:) [], ParseException
    + FullyQualifiedErrorId : UnexpectedToken

C:\Users\pfeiffer.stefan\Downloads\86023bfad2bdd84d8b1a-e0e76833d142fd6958f1d7f46ef7c2c1c3699288
λ cd ..
C:\Users\pfeiffer.stefan\Downloads
λ cd .\afcedadb28ba145fe494-3821b68f78d1c690335590d64a9471c505860b9d
C:\Users\pfeiffer.stefan\Downloads\afcedadb28ba145fe494-3821b68f78d1c690335590d64a9471c505860b9d
λ .\prompt.ps1
At C:\Users\pfeiffer.stefan\Downloads\afcedadb28ba145fe494-3821b68f78d1c690335590d64a9471c505860b9d\prompt.ps1:16 char:36
+ $BranchAheadStatusSymbol  = ''#''
+                                    ~~~
Unexpected token ''#'' in expression or statement.
At C:\Users\pfeiffer.stefan\Downloads\afcedadb28ba145fe494-3821b68f78d1c690335590d64a9471c505860b9d\prompt.ps1:16 char:39
+ $BranchAheadStatusSymbol  = ''#''
+                                       ~
Unexpected token 'î' in expression or statement.
At C:\Users\pfeiffer.stefan\Downloads\afcedadb28ba145fe494-3821b68f78d1c690335590d64a9471c505860b9d\prompt.ps1:18 char:47
+ ... ol = '' #"$BranchBehindStatusSymbol$BranchAheadStatusSymbol"
+                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Unexpected token '' #"$BranchBehindStatusSymbol$BranchAheadStatusSymbol"
$BranchIdenticalStatusToSymbol = '' in expression or statement.
At C:\Users\pfeiffer.stefan\Downloads\afcedadb28ba145fe494-3821b68f78d1c690335590d64a9471c505860b9d\prompt.ps1:19 char:35
+ $BranchIdenticalStatusToSymbol = 'î‚ '
+                                   ~~~~
Unexpected token 'î‚ '' in expression or statement.
At C:\Users\pfeiffer.stefan\Downloads\afcedadb28ba145fe494-3821b68f78d1c690335590d64a9471c505860b9d\prompt.ps1:48 char:5
+     }
+     ~
Unexpected token '}' in expression or statement.
At C:\Users\pfeiffer.stefan\Downloads\afcedadb28ba145fe494-3821b68f78d1c690335590d64a9471c505860b9d\prompt.ps1:53 char:1
+ }
+ ~
Unexpected token '}' in expression or statement.
At C:\Users\pfeiffer.stefan\Downloads\afcedadb28ba145fe494-3821b68f78d1c690335590d64a9471c505860b9d\prompt.ps1:56 char:87
+ ... ion).ToString().Replace($env:USERPROFILE, '~').Replace('\', '  ');
+                                                                     ~
Missing ')' in method call.
At C:\Users\pfeiffer.stefan\Downloads\afcedadb28ba145fe494-3821b68f78d1c690335590d64a9471c505860b9d\prompt.ps1:56 char:87
+ ... ion).ToString().Replace($env:USERPROFILE, '~').Replace('\', '  ');
+                                                                     ~
Unexpected token '±' in expression or statement.
At C:\Users\pfeiffer.stefan\Downloads\afcedadb28ba145fe494-3821b68f78d1c690335590d64a9471c505860b9d\prompt.ps1:155 char:14
+     return ' '
+              ~
The string is missing the terminator: '.
At C:\Users\pfeiffer.stefan\Downloads\afcedadb28ba145fe494-3821b68f78d1c690335590d64a9471c505860b9d\prompt.ps1:55 char:23
+ function Get-FancyDir {
+                       ~
Missing closing '}' in statement block or type definition.
    + CategoryInfo          : ParserError: (:) [], ParseException
    + FullyQualifiedErrorId : UnexpectedToken

Any idea? Thanks