Pull request in AzureDevops is not working when source is external

[coenm]

see https://dev.azure.com/cmunckhof/Open%20Source/_build/results?buildId=1987&view=results

[coenm]

[coenm]

References service endpoint. PRs from repository forks are not allowed to access secrets in the pipeline. For more information see https://go.microsoft.com/fwlink/?linkid=862029

[coenm]

Run analysis error message

Starting: Run Code Analysis

Task : Run Code Analysis
Description : Run scanner and upload the results to the SonarCloud server.
Version : 1.45.0
Author : sonarsource
Help : Version: 1.45.0. This task is not needed for Maven and Gradle projects since the scanner should be run as part of the build.

More Information

##[error]Variables are missing. Please make sure that you are running the Prepare task before running the Analyze task.
Make sure you are not mixing tasks from different major versions. If you are using a multistage pipeline, make sure the tasks are in the same stage.
Finishing: Run Code Analysis

[coenm]

https://learn.microsoft.com/en-us/azure/devops/pipelines/build/variables?view=azure-devops&tabs=yaml

SYSTEM_PULLREQUEST_ISFORK = False
condition: ne(variables['Build.SourceBranch'], 'refs/heads/external-repo/*')

[coenm]

SYSTEM_PULLREQUEST_ISFORK = False
SYSTEM_PULLREQUEST_MERGEDAT =
SYSTEM_PULLREQUEST_PULLREQUESTID = 1899017550
SYSTEM_PULLREQUEST_PULLREQUESTNUMBER = 129
SYSTEM_PULLREQUEST_SOURCEBRANCH = feature/docs-tags
SYSTEM_PULLREQUEST_SOURCECOMMITID = 82a077e
SYSTEM_PULLREQUEST_SOURCEREPOSITORYURI = https://github.com/coenm/RepoM
SYSTEM_PULLREQUEST_TARGETBRANCH = main
SYSTEM_PULLREQUEST_TARGETBRANCHNAME = main

BUILD_REASON = PullRequest
BUILD_SOURCEBRANCH = refs/pull/129/merge

BUILD_REPOSITORY_ID = coenm/RepoM
BUILD_REPOSITORY_NAME = coenm/RepoM
BUILD_REPOSITORY_URI = https://github.com/coenm/RepoM

[coenm]

condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'), eq(variables['System.TeamFoundationCollectionUri'], 'https://dev.azure.com/cmunckhof/'), ne(variables['Build.Reason'], 'PullRequest'))