Build pipelines migration

[MGitrov]

Hey everyone 👋🏼
I have tried to migrate my pipelines from a TFVC-based repository to a Git-based repository, but only my release pipelines were migrated successfully.

The error for the build pipelines is as follows:

[15:07:52 ERR] [16.0.9] Error migrating BuildDefinition: Python-package-CI. Please migrate it manually.
Url: POST https://dev.azure.com/xyz/Git-based target project/_apis/build/definitions/
{"$id":"1","innerException":null,"message":"Value cannot be null.\r\nParameter name: definition.Repository.Mappings.Mapping.ServerPath","typeName":"System.ArgumentNullException, mscorlib","typeKey":"ArgumentNullException","errorCode":0,"eventId":0}

I tried to do some mapping in the configuration.json file, but clearly I am missing something.

Here is my configuration.json file:

{
  "Serilog": {
    "MinimumLevel": "Information"
  },
  "MigrationTools": {
    "Version": "16.0",
    "Endpoints": {
      "Source": {
        "EndpointType": "AzureDevOpsEndpoint",
        "AuthenticationMode": "AccessToken",
        "AccessToken": PAT,
        "Organisation": "https://dev.azure.com/xyz/",
        "Project": "TFS-based test project",
        "Repository": {
          "Name": "TFS-based test project",
          "Type": "TFVC",
          "Mappings": [
            {
              "ServerPath": "$/TFS-based test project",
              "LocalPath": "src"
            }
          ]
        },
        "ReflectedWorkItemIdField": null
      },
      "Target": {
        "EndpointType": "AzureDevOpsEndpoint",
        "AuthenticationMode": "AccessToken",
        "AccessToken": PAT,
        "Organisation": "https://dev.azure.com/xyz/",
        "Project": "Git-based target project",
        "ReflectedWorkItemIdField": null
      }
    },
    "Processors": [
      {
        "ProcessorType": "AzureDevOpsPipelineProcessor",
        "Enabled": true,
        "MigrateBuildPipelines": true,
        "MigrateReleasePipelines": true,
        "MigrateTaskGroups": true,
        "MigrateVariableGroups": true,
        "MigrateServiceConnections": true,
        "BuildPipelines": null,
        "ReleasePipelines": null,
        "RepositoryNameMaps": {
          "TFS-based test project": "Git-based target project"
        },
        "SourceName": "Source",
        "TargetName": "Target"
      }
    ],
    "CommonTools": {
      "TfsChangeSetMappingTool": {
        "Enabled": true,
        "ChangeSetMappingFile": null
      },
      "TfsGitRepositoryTool": {
        "Enabled": true,
        "Mappings": null
      },
      "FieldMappingTool": {
        "Enabled": true,
        "FieldMaps": []
      }
    }
  }
}

Here is my build pipeline source configuration in Azure DevOps:

[MrHinsh]

We do not have any support, nor have we done any testing with TFVC.

The only TFVC support we have is for TF-Git mapping file support.

[MGitrov]

Oh, so most of the migration issues discussed here were from a Git-based repo to a Git-based repo?

I do managed to perform a migration of the work items, shared queries, etc., from a TFVC-based repo to a Git-based repo.