Getting the last updated/commited file in git repository of VSTS - azure

Question

I am trying to deltafy the deployment of pipelines of Azure Data Factory. In other words, I am planning to deploy only the recently modified pipelines or recently added pipelines to the ADF in Azure portal. Currently, I use powershell task in my CD pipeline to deploy all the pipelines. How do I get the recently modified pipelines using the timestamp? Any suggestions will help. :)

Answer 1

If you want to build all the files but push/publish only the modified files to deploy, that’s possible.
You can use a PowerShell task to get the last commit id (sha-1 value) in $(Build.SourcesDirectory), and then use git show <commit id> to find which files are changed in the commit, then copy these files to $(build.artifactstagingdirectory). And finally publish these files to server.

Answer 2

You can get changed files by using the REST API.
Simple powershell script:
Param(
[string]$collection,
[string]$project,
[string]$repository,
[string]$commit,
[string]$token
)
$u="$($collection)$($project)/_apis/git/repositories/$repository/commits/$commit/changes"
Write-Output $u
$changedFiles=New-Object System.Collections.ArrayList
$base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("{0}:{1}" -f "",$token)))
$result=Invoke-RestMethod -Method Get -Uri $u -Headers #{Authorization=("Basic {0}" -f $base64AuthInfo)} -ContentType "application/json"
Foreach($c in $result.changes)
{
If($c.item.isFolder -ne 'true')
{
Write-Output $c.item.path
$changedFiles.Add(($c.item.path))
}
}
Arguments (check Allow scripts to access OAuth token option in build/release definition):
-collection $(System.TeamFoundationCollectionUri) -project $(System.TeamProject) -repository $(Build.Repository.Name) -commit $(Build.SourceVersion) -token $(System.AccessToken)