PowerIShell

for developers

Who am I?

  • User of every useful technology
  • DevOps and automation adept
  • DevWarszaty vice-CEO
  • Working in FinAi as Software Architect (& DevOps ninja)
  • Former mBank architecture team member
  • My blog is stapp.space
  • My Twitter is @ptrstpp950

    • PowerShell
    why? why? why?

  • It exists and guys in MS love it
  • It is better than cmd and git console - I will prove it
  • It has a lot of build and created stuff which helps in crafting software

    • Demo 1

    Let me introduce myself


    Copy & paste :)

    $voice = New-Object -ComObject SAPI.SPVoice
$voice.Rate = -1
$voice.Speak("Witajcie chłopcy i dziewczęta
      Pozwólcie że się przedstawię. 
      Jestem PowerShell");

    Rebus

    posh posh git

    Demo 2

    posh-git


    How to install

    (new-object Net.WebClient).DownloadString(
      "http://psget.net/GetPsGet.ps1") | iex
      
Install-Module posh-git

    Posh*

    Thre are more posh* modules
  • posh-svn and posh-hg
  • posh-npm - for NPM
  • posh-gvm - for groovy
  • posh-couch - for CouchDB
  • and much more just run: Get-PsGetModuleInfo Posh* or browse http://psget.net/directory/

    • Work with log files

    Log files form production usually:
  • are on Windows/Samba share
  • are big and spitted into many files (rolling logs)
  • are in compressed format (tgz, rar, zip)
  • we want to grep them

    • Demo 3 - unpack and grep log files

    It is said but grep for log files in useful

    set-alias 7zip "C:\Program Files\7-Zip\7z.exe"
pushd "$powerISHellRoot\logs"
rm *.log
get-childItem -Path .\gzip | foreach{7zip x $_.FullName}
gci -Filter "*.log" | select-string "Kaczka"
set-alias grep select-string
gci -Filter "*.log" | grep -context 5 "Kaczka"

    Installation

    Installation in bash is already on Windows. We can use PowerShell for this

    For example to install Chocolatey we can run 
    @powershell -NoProfile -ExecutionPolicy unrestricted 
-Command "iex ((new-object net.webclient).DownloadString('
https://chocolatey.org/install.ps1'))" 
&& SET PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin

    SUDO

    I really miss sudo command from Linux. In PowerShell we can have it: 
    function sudo  {
    $file, [string]$arguments = $args;
    $psi = new-object System.Diagnostics.ProcessStartInfo $file;
    $psi.Arguments = $arguments;
    $psi.Verb = "runas";
    $psi.WorkingDirectory = get-location;
    [System.Diagnostics.Process]::Start($psi);
}

    SUDO example

    pushd "$powerISHellRoot\Demo-VisualStudio"
sudo devenv.exe .\Demo-VisualStudio.sln
popd

    Record your actions

    In PowerShell we can record user actions (too see if he run proper commands :) )

    Start-Transcript -Path .\trasnsript.txt
ls
sudo notepad C:\Windows\System32\drivers\etc\hosts
Stop-Transcript

    Debugging your script

  • Traditional "alert" -> Write-Host
  • There is a Windows PowerShell ISE
  • VS + PowerShell Tools
  • Visual Studio Code with PowerShell plugin - the best of the best :D

    • Debugging progress bar

    $wmiQuery = "Select name from win32_service where 
                state = 'running'"
$colItems = Get-WmiObject -Query $wmiQuery
For($i = 1; $i -le $colItems.count; $i++){ 
    Write-Progress -Activity "Query svc" -status "Found $i" `
      -percentComplete ($i /$colItems.count*100)            
}           
$colItems | Select name

    Package Manager Console is in VS

    It is full PowerShell with separate profile :) Allows to do interact with VS:)

    Package Manager Console Evil Demo

    Run Visual Studio, open one document and paste following into Package Manager Console

    $dte.ActiveDocument.Selection.Insert("DROP TABLE :)")

    Package-Manager-Console cool stuff:

  • Insert Text into Current Document at Cursor
  • Copy Text to the Clipboard
  • Loop Through All Projects in the Solution
  • Delete an Item in a Project
  • More on: James Chamber blog
  • In mBank we have script with download framework core with all needed plugins. Then setup and run IIS Express, run standalone WCF, attach debugger to both

    • Powershell Remote

    WinRM

    Invoke-Command -ComputerName MyPC `
  -ScriptBlock { Get-ChildItem C:\ } `
  -credential xxx

    Powershell Remote

    SSH

    set-alias ssh "C:\Program Files\Git\usr\bin\ssh.exe"
(Get-Host).UI.RawUI.BackgroundColor = "black"
ssh -p $port $ip;

    Powershell Remote

    Powershell Web Access

    pwa

    Powershell Remote

    KUDU

    azure

    Final demo

    iex (New-Object Net.WebClient).DownloadString(`
  "http://www.leeholmes.com/"+`
  "projects/ps_html5/Invoke-PSHtml5.ps1");

    The end