How do I push a NuGet package from Appveyor build only if all builds in matrix are successful? - appveyor

Question

I have a library with source code hosted on GitHub and configured to build on Appveyor CI (e.g. https://github.com/vostok/temp-library/blob/master/appveyor.yml).
I'd like to build and test this library on different platforms:
.NET Framework on Windows
.NET Core on Windows
.NET Core on Ubuntu
Naturally, I would configure a build matrix to build on different platforms. But then, I'd like to build and push a NuGet package only if all builds on all platforms were successful.
How do I configure something like this on Appveyor?

Answer 1

To run tests on Ubuntu and Windows, you also need to build before. So what you need to do is to make Windows job to wait for others (I am not sure which Windows job, as you have 2 of them but I believe you know).
So to make one matrix job wait for others, you need to do some scripting. Please use this sample as a reference.
write-host "Waiting for other jobs to complete"
$headers = #{
"Authorization" = "Bearer $env:ApiKey"
"Content-type" = "application/json"
}
[datetime]$stop = ([datetime]::Now).AddMinutes($env:TimeOutMins)
[bool]$success = $false
while(!$success -and ([datetime]::Now) -lt $stop) {
$project = Invoke-RestMethod -Uri "https://ci.appveyor.com/api/projects/$env:APPVEYOR_ACCOUNT_NAME/$env:APPVEYOR_PROJECT_SLUG" -Headers $headers -Method GET
$success = $true
$project.build.jobs | foreach-object {if (($_.jobId -ne $env:APPVEYOR_JOB_ID) -and ($_.status -ne "success")) {$success = $false}; $_.jobId; $_.status}
if (!$success) {Start-sleep 5}
}
if (!$success) {throw "Test jobs were not finished in $env:TimeOutMins minutes"}
If you have more than one concurrent job, you can make it wait longer. If you have only one concurrent job, make it wait less (because with one concurrent job when last job started, others already finished one way or another)
To make this script and Nuget deployment run only in specific Windows job, specialize matrix job configuration
$env:ApiKey you get at https://ci.appveyor.com/api-token and store as secure variable.