CI: add reporting to the scheduled check

.github/workflows/scheduled.yml

@@ -11,6 +11,9 @@ concurrency:
   group: scheduled
   cancel-in-progress: true
 
+permissions:
+  issues: write
+
 jobs:
   create_matrix:
     if: startsWith( github.repository, 'Homebrew/' )
@@ -31,29 +34,33 @@ jobs:
           cask: false
           test-bot: false
 
-      - id: matrix
+      - name: Generate matrix
+        id: matrix
         run: |
-          formula="$(find "$(brew --repo "${TAP}")/Formula" | shuf -n "${TEST_COUNT}" | xargs -I{} basename {} .rb)"
+          formula="$(find "$(brew --repo "${TAP}")/Formula" -type f | shuf -n "${TEST_COUNT}" | xargs -I{} basename {} .rb)"
           # shellcheck disable=SC2086
           json="$(
             brew info --json=v2 $formula |
-              jq --compact-output '[.formulae[] | select(.deprecated == false and .disabled == false) | .name]'
+            jq --compact-output '[.formulae[] | select(.deprecated == false and .disabled == false) | .name]'
           )"
           echo "json=${json}" >> "$GITHUB_OUTPUT"
 
   audit_online:
     if: startsWith( github.repository, 'Homebrew/' )
-    runs-on: ubuntu-22.04
+    runs-on: ${{ matrix.os }}
     container:
       image: ghcr.io/homebrew/ubuntu22.04:master
     needs: create_matrix
-    name: "Online check: ${{ matrix.formula }}"
+    name: "Online check (${{ matrix.os }}): ${{ matrix.formula }}"
     env:
       HOMEBREW_GITHUB_API_TOKEN: "${{ github.token }}"
+      GH_TOKEN: "${{ github.token }}"
+      REPORTING_ISSUE: 139929
     strategy:
       fail-fast: false
       matrix:
         formula: ${{ fromJson(needs.create_matrix.outputs.json) }}
+        os: [ubuntu-22.04]
     steps:
       - name: Set up Homebrew
         id: set-up-homebrew
@@ -63,8 +70,54 @@ jobs:
           cask: false
           test-bot: false
 
-      - name: Check formula for missing upstreams etc.
-        run: brew audit --online --skip-style --only github_repository_archived,gitlab_repository_archived,homepage ${{ matrix.formula }}
+      - name: Check formula source is not archived.
+        id: archived
+        if: matrix.os != 'macos-latest'
+        run: brew audit --online --skip-style --only github_repository_archived,gitlab_repository_archived ${{ matrix.formula }}
+
+      - name: Report online issues
+        if: ${{ failure() && steps.archived.conclusion == 'failure' }}
+        run: |
+          gh issue comment "$REPORTING_ISSUE" \
+                           --repo homebrew/homebrew-core \
+                           --body "${{ matrix.formula }} should be archived. Check ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+
+      - name: Check formula for unavailable homepage.
+        id: homepage
+        if: matrix.os != 'macos-latest'
+        run: brew audit --online --skip-style --only homepage ${{ matrix.formula }}
+
+      - name: Report homepage issues
+        if: ${{ failure() && steps.homepage.conclusion == 'failure' }}
+        run:  |
+          gh issue comment "$REPORTING_ISSUE" \
+                           --repo homebrew/homebrew-core \
+                           --body "${{ matrix.formula }} has homepage issues. Check ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
 
       - name: Check formula for missing sources.
+        id: fetch
+        if: matrix.os != 'macos-latest'
         run: brew fetch -s ${{ matrix.formula }}
+
+      - name: Report fetch issues
+        if: ${{ failure() && steps.fetch.conclusion == 'failure' }}
+        run:  |
+          gh issue comment "$REPORTING_ISSUE" \
+                           --repo homebrew/homebrew-core \
+                           --body "${{ matrix.formula }} source has problems. Check ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+
+      - name: Try and build formula.
+        id: build
+        env:
+          HOMEBREW_NO_INSTALL_FROM_API: '1'
+        run: brew install -s ${{ matrix.formula }}
+
+      # TODO: Re-enable once it skips formulae that are not fir the current OS
+      # - name: Report build issues
+      #   if: ${{ failure() && steps.build.conclusion == 'failure' }}
+      #   run:  |
+      #     gh issue comment "$REPORTING_ISSUE" \
+      #                      --repo homebrew/homebrew-core \
+      #                      --body "${{ matrix.formula }} failed to build on ${{ matrix.os }}. Check ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+
+