Move get-xamarin-versions pipeline

.github/workflows/get-xamarin-versions.yml

@@ -0,0 +1,68 @@
+name: Get Xamarin versions
+on:
+  schedule:
+    - cron: '0 8 * * THU'
+  workflow_dispatch:
+
+env:
+  TOOL_NAME: "Xamarin"
+defaults:
+  run:
+    shell: pwsh
+
+jobs:
+  find_new_versions:
+    name: Find new versions
+    runs-on: ubuntu-latest
+    outputs:
+      versions_output: ${{ steps.Get_new_versions.outputs.TOOL_VERSIONS }}
+    steps:
+      - uses: actions/checkout@v2
+
+      - id: Get_new_versions
+        name: Get new versions
+        run: ./get-new-tool-versions/get-new-tool-versions.ps1 -ToolName ${{ env.TOOL_NAME }}
+
+  check_new_versions:
+    name: Check new versions
+    runs-on: ubuntu-latest
+    needs: find_new_versions
+    env:
+      TOOL_VERSIONS: ${{needs.find_new_versions.outputs.versions_output}}
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Check Versions
+        if: success() && env.TOOL_VERSIONS == ''
+        run: |
+          Write-Host "No new versions were found"
+          Import-Module "./github/github-api.psm1"
+          $gitHubApi = Get-GitHubApi -RepositoryFullName "$env:GITHUB_REPOSITORY" `
+                                     -AccessToken "${{ secrets.GITHUB_TOKEN }}"
+
+          $gitHubApi.CancelWorkflow("$env:GITHUB_RUN_ID")
+          Start-Sleep -Seconds 60
+
+      - name: Send Slack notification
+        run: |
+          ./get-new-tool-versions/send-slack-notification.ps1 -Url "${{ secrets.SLACK_CHANNEL_URL }}" `
+                                                                      -ToolName "${{ env.TOOL_NAME }}" `
+                                                                      -ToolVersion "${{ env.TOOL_VERSIONS }}" `
+                                                                      -ImageUrl "https://avatars.githubusercontent.com/u/790012?s=200&v=4"
+
+  check_build:
+    name: Check build for failures 
+    runs-on: ubuntu-latest
+    needs: [find_new_versions, check_new_versions]
+    if: failure()
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Send Slack notification if build fails
+        run: |
+          $pipelineUrl = "$env:GITHUB_SERVER_URL/$env:GITHUB_REPOSITORY/actions/runs/$env:GITHUB_RUN_ID"
+          $Message = "The build of the '${{ env.TOOL_NAME }}' detection pipeline failed :progress-error:\nLink to the pipeline: $pipelineUrl"
+          ./get-new-tool-versions/send-slack-notification.ps1 -Url "${{ secrets.SLACK_CHANNEL_URL }}" `
+                                                                      -ToolName "${{ env.TOOL_NAME }}" `
+                                                                      -Text "$Message" `
+                                                                      -ImageUrl "https://avatars.githubusercontent.com/u/790012?s=200&v=4"