Install solution automatically after adding solution using powershell

Question

I am using powershell to update and deploy solutions

UpdateSolution.ps1

Add-SPSolution -Identity SomeWP.wsp -LiteralPath $PSScriptRoot\SomeWP.wsp -GACDeployment
Add-SPSolution -Identity SomeWP.wsp -LiteralPath $PSScriptRoot\SomeWP.wsp -GACDeployment

Deploy Solution.ps1

param([string]$workspaceUrl)
[Microsoft.SharePoint.SPSecurity]::RunWithElevatedPrivileges(
{
Install-SPSolution –Identity SomeWP.wsp –WebApplication $workspaceUrl –GACDeployment -Force
Install-SPSolution –Identity SomeWP.wsp –WebApplication $workspaceUrl –GACDeployment -Force
}
)

Now if I run Update.ps1 and wait for sometime and then run Deploy.ps1, it works fine, but if I run them one after the other it says

Install-SPSolution : A deployment or retraction is already under way for the solution "someWP.wsp", and only one deployment or retraction at a time is supported.

Now how can I automate this? like once the update is complete, I want to run deploy automatically

Answer 1

I have good success using powershell DSC to install and update solutions. For example this block install and deploys the solution.

SPFarmSolution appointment.workflow.v.1.0.0.wsp
        {
            Name                  = "appointment.workflow.v.1.0.0.wsp"
            LiteralPath           = "path to solution"
            Ensure                = "Present"
            Version               = "1.0.0"
            WebApplications       = @("https.dev.com")
            Deployed              = $true
            PsDscRunAsCredential  = $Script:FarmAdmin
        }

To remove, change "deployed" to false and Ensure "Absent". I have used this method to update custom solutions across several dozen farms.

The workflow: The solution is updated and the version number is changed. Solution is uploaded to DSC Pull server DSC Script is run to uninstall old solution Script is updated to install new solution New script is then run

It has worked pretty well for me