Managing branches with Azure DevOps Classic Build Pipelines and TFVC

Since you need to clone pipelines in batches, using scripts to run the Rest API will be a reasonable method. As far as I know, there is no easy way out of the box other than this.

You could try the following PowerShell Script Sample:

$DefinitionIds = "PipelineIDs"  #InPut All Pipelineids(e.g. "324,323,xxx" )
$DefinitionId = $DefinitionIds.split(",");
$token = "PAT Token"

$token = [System.Convert]::ToBase64String([System.Text.Encoding]::ASCII.GetBytes(":$($token)"))

foreach ($i in $DefinitionId)
{
echo $i

$url="https://dev.azure.com/{OrganizationName}/{ProjectName}/_apis/build/definitions/$($i)?api-version=6.0"


$response = Invoke-RestMethod -Uri $url -Headers @{Authorization = "Basic $token"} -Method Get  -ContentType application/json

Write-Host "$($response | ConvertTo-Json -Depth 100)"


$response.repository.properties.tfvcMapping= '{"mappings":[{"serverPath":"$/TFVCBranchName","mappingType":"map","localPath":"\\"}]}' # ServerPath is the Branch name

$response.repository.name = "TFVCRepoName" #Repo Source Name

$response.name = "Pipeline $i Clone" # Cloned PipelineName 

echo $response.name

$url1= "https://dev.azure.com/{OrganizationName}/{ProjectName}/_apis/build/definitions?api-version=6.0"


$json = @($response) | ConvertTo-Json -Depth 100

$response1 = Invoke-RestMethod -Uri $url1 -Headers @{Authorization = "Basic $token"} -Method Post -Body $json -ContentType application/json


}

Here are the Two Rest APIs used in the Script:

Definitions - Get

Definitions - Create

Result:

The cloned Pipeline will be set to the new TFVC branch and Build definition name.