uploadwsp.ps1

#Credentials to connect to office 365 tenenat admin url 
$url ="https://velegandla-admin.sharepoint.com"
$username="spj@Velegandla.onmicrosoft.com"
$password="yourpassword"
$Password = $password |ConvertTo-SecureString -AsPlainText -force

Write-Host "Load CSOM libraries" -foregroundcolor black -backgroundcolor yellow
Set-Location $PSScriptRoot
Add-Type -Path (Resolve-Path "Microsoft.SharePoint.Client.dll")
Add-Type -Path (Resolve-Path "Microsoft.SharePoint.Client.Runtime.dll")
Add-Type -Path (Resolve-Path "Microsoft.Online.SharePoint.Client.Tenant.dll")	
Write-Host "CSOM libraries loaded succeessfully" -foregroundcolor black -backgroundcolor Green	

Write-Host "authenticate to SharePoint Online Tenant site $url and get ClientContext object" -foregroundcolor black -backgroundcolor yellow		
$Context = New-Object Microsoft.SharePoint.Client.ClientContext($url) 
$credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($username, $password) 
$Context.Credentials = $credentials 
$context.RequestTimeOut = 5000 * 60 * 10;
$web = $context.Web
$site = $context.Site	
$context.Load($web)
$context.Load($site)
try
{
  $context.ExecuteQuery()
  Write-Host "authenticateed to SharePoint Online Tenant site $url and get ClientContext object succeefully" -foregroundcolor black -backgroundcolor Green
}
catch
{
  Write-Host "Not able to authenticateed to SharePoint Online $_.Exception.Message" -foregroundcolor black -backgroundcolor Red
  return
}

# Redaing Data from configuration.xml file
$xmlFilePath = "$PSScriptRoot\wsp.xml"
Write-Host "Load solutions xml file" -foregroundcolor black -backgroundcolor yellow
[xml]$xmlContent = (Get-Content $xmlFilePath)
if (-not $xmlContent)
{
  Write-Host "Xml was not loaded successfully." -foregroundcolor black -BackgroundColor Red	
  return
}		
Write-Host "Solutions xml file loaded successfully" -foregroundcolor black -BackgroundColor Green

#Get all WSP files
$wspFilesFolder = $PSScriptRoot + "\Solutions"
$wspFiles = Get-ChildItem $wspFilesFolder

function Add-wspsolutions($xmlsolutions)
{
  foreach ($file in $wspFiles) {
  if($file.Name -eq $xmlsolutions.Name)
  {
    Write-Host "Adding WSP file" $xmlsolutions.Name -foregroundcolor black -backgroundcolor yellow
    $fileBytes = [System.IO.File]::ReadAllBytes($file.FullName)
    $fileCreateInfo = New-Object Microsoft.SharePoint.Client.FileCreationInformation
    $fileCreateInfo.Content = $fileBytes
    $fileCreateInfo.Url = $list.RootFolder.ServerRelativeUrl + "/" + $file.Name
    $fileCreateInfo.Overwrite = $true
    $file = $list.RootFolder.Files.Add($fileCreateInfo)
    $context.Load($file)
      try
      {
        $context.ExecuteQuery()
        Write-Host "Added WSP file "$xmlsolutions.Name" successfully" -foregroundcolor black -backgroundcolor Green
      }
      catch
      {
        Write-Host "Error while Adding WSP file "$xmlsolutions.Name" $_.Exception.Message" -foregroundcolor black -backgroundcolor yellow
        return
      }
  }
  }
}

$xmlContent.sites.site|
ForEach-Object {
  Write-Host "authenticate to SharePoint Online site collection" $xmlContent.sites.site.Url " and get ClientContext object" -foregroundcolor black -backgroundcolor yellow		
  $Context = New-Object Microsoft.SharePoint.Client.ClientContext($_.Url) 
  $Context.Credentials = $credentials 
  $context.RequestTimeOut = 5000 * 60 * 10;
  $web = $context.Web
  $site = $context.Site
  $list = $context.Web.Lists.GetByTitle('Solution Gallery')
  $context.Load($list.RootFolder)
  $context.Load($web)
  $context.Load($site)
    try
    {
      $context.ExecuteQuery()
      Write-Host "authenticate to SharePoint Online site collection" $xmlContent.sites.site.Url "and get ClientContext object" -foregroundcolor black -backgroundcolor Green		
    }
    catch
    {
      Write-Host "Not able to authenticate to SharePoint Online site collection" $xmlContent.sites.site.Url "$_.Exception.Message" -foregroundcolor black -backgroundcolor Red		
      return
    }
  $_.solutions.WSP |
  ForEach-Object {
  Add-wspsolutions ($_)
  }
}