New parser for xamarin and python. Reworked workflow with composite actions (#41)

.github/workflows/get-tools-new-versions.yml

@@ -0,0 +1,82 @@
+name: Get tools new versions
+on:
+  schedule:
+    - cron: '0 8 * * THU'
+  workflow_dispatch:
+
+defaults:
+  run:
+    shell: pwsh
+
+jobs:
+  find-new-xamarin-versions:
+    name: Searching for new Xamarin versions
+    runs-on: ubuntu-latest
+    outputs:
+      versions-output: ${{ steps.get-new-xamarin-versions.outputs.versions-output }}
+    steps:
+      - uses: actions/checkout@v2
+      - id: get-new-xamarin-versions
+        name: Get new Xamarin versions
+        run: echo "::set-output name=versions-output::$(./get-new-tool-versions/verify-new-tool-version-added-to-image.ps1 -ToolName Xamarin)"
+  
+  check-new-xamarin-versions:
+    name: Verifying new Xamarin versions exist
+    runs-on: ubuntu-latest
+    needs: find-new-xamarin-versions
+    steps:
+      - uses: actions/checkout@v2
+      - name: Check Versions
+        if: needs.find-new-xamarin-versions.outputs.versions-output == ''
+        run: Write-Host "No new versions found"
+      - uses: ./.github/actions/send-slack-notification
+        if: needs.find-new-xamarin-versions.outputs.versions-output != ''
+        with:
+          url: ${{ secrets.SLACK_CHANNEL_URL }}
+          tool-name: 'Xamarin'
+          tool-version: ${{ needs.find-new-xamarin-versions.outputs.versions-output }}
+          image-url: 'https://avatars.githubusercontent.com/u/790012?s=200&v=4'
+          add-to-toolset-flag: '-AddToToolsetFlag'
+  
+  find-new-python-versions:
+    name: Searching for new Python versions
+    runs-on: ubuntu-latest
+    outputs:
+      versions-output: ${{ steps.get-new-python-versions.outputs.versions-output }}
+    steps:
+      - uses: actions/checkout@v2
+      - id: get-new-python-versions
+        name: Get new Python versions
+        run: echo "::set-output name=versions-output::$(./get-new-tool-versions/verify-new-tool-version-added-to-image.ps1 -ToolName Python)"
+  
+  check-new-python-versions:
+    name: Verifying new Python versions exist
+    runs-on: ubuntu-latest
+    needs: find-new-python-versions
+    steps:
+      - uses: actions/checkout@v2
+      - name: Check Versions
+        if: needs.find-new-python-versions.outputs.versions-output == ''
+        run: Write-Host "No new versions found"
+      - uses: ./.github/actions/send-slack-notification
+        if: needs.find-new-python-versions.outputs.versions-output != ''
+        with:
+          url: ${{ secrets.SLACK_CHANNEL_URL }}
+          tool-name: 'Python'
+          tool-version: ${{ needs.find-new-python-versions.outputs.versions-output }}
+          image-url: 'https://www.python.org/static/community_logos/python-powered-h-100x130.png'
+          add-to-toolset-flag: '-AddToToolsetFlag'
+
+  check_build:
+    name: Check build for failures 
+    runs-on: ubuntu-latest
+    needs: [check-new-xamarin-versions, check-new-python-versions]
+    if: failure()
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ./.github/actions/send-slack-notification
+        with:
+          url: ${{ secrets.SLACK_CHANNEL_URL }}
+          tool-name: 'Python or Xamarin'
+          pipeline-url: '$env:GITHUB_SERVER_URL/$env:GITHUB_REPOSITORY/actions/runs/$env:GITHUB_RUN_ID'
+          text: "The build of the Xamarin or Python detection pipeline has failed stages:"