.github/actions/runner-fallback/action.yml

@@ -1,61 +0,0 @@
-# actions/runner-fallback/action.yml
-name: "Runner Fallback"
-description: |
-  Chooses a self-hosted runner when one with the required labels is online,
-  otherwise returns a fallback GitHub-hosted label.
-inputs:
-  primary-runner:
-    description: 'Comma-separated label list for the preferred self-hosted runner (e.g. "self-hosted,linux")'
-    required: true
-  fallback-runner:
-    description: 'Comma-separated label list or single label for the fallback (e.g. "ubuntu-latest")'
-    required: true
-  github-token:
-    description: "PAT or GITHUB_TOKEN with `repo` scope"
-    required: true
-
-outputs:
-  use-runner:
-    description: "JSON array of labels you can feed straight into runs-on"
-    value: ${{ steps.pick.outputs.use-runner }}
-
-runs:
-  using: "composite"
-  steps:
-    - name: Check self-hosted fleet
-      id: pick
-      shell: bash
-      env:
-        TOKEN: ${{ inputs.github-token }}
-        PRIMARY: ${{ inputs.primary-runner }}
-        FALLBACK: ${{ inputs.fallback-runner }}
-      run: |
-        # -------- helper -----------
-        to_json_array () {
-          local list="$1"; IFS=',' read -ra L <<<"$list"
-          printf '['; printf '"%s",' "${L[@]}"; printf ']'
-        }
-        # -------- query API ---------
-        repo="${{ github.repository }}"
-        runners=$(curl -s -H "Authorization: Bearer $TOKEN" \
-                        -H "Accept: application/vnd.github+json" \
-                        "https://api.github.com/repos/$repo/actions/runners?per_page=100")
-        # Split wanted labels
-        IFS=',' read -ra WANT <<<"$PRIMARY"
-        online_found=0
-        while read -r row; do
-          labels=$(jq -r '.labels[].name' <<<"$row")
-          ok=1
-          for w in "${WANT[@]}"; do
-            grep -Fxq "$w" <<<"$labels" || { ok=0; break; }
-          done
-          [ "$ok" -eq 1 ] && { online_found=1; break; }
-        done < <(jq -c '.runners[] | select(.status=="online")' <<<"$runners")
-
-        if [ "$online_found" -eq 1 ]; then
-          echo "✅ Self-hosted runner online."
-          echo "use-runner=$(to_json_array "$PRIMARY")" >>"$GITHUB_OUTPUT"
-        else
-          echo "❌ No matching self-hosted runner online - using fallback."
-          echo "use-runner=$(to_json_array "$FALLBACK")" >>"$GITHUB_OUTPUT"
-        fi

.github/workflows/docs-and-testcov.yml

@@ -17,23 +17,10 @@ permissions:
   pages: write
 
 jobs:
-  pick-runner:
-    runs-on: ubuntu-latest
-    outputs:
-      runner: ${{ steps.choose.outputs.use-runner }}
-    steps:
-      - uses: actions/checkout@v4
-
-      - id: choose
-        uses: ./.github/actions/runner-fallback
-        with:
-          primary-runner: "self-hosted,ubuntu-latest"
-          fallback-runner: "ubuntu-latest"
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-
   docs-and-testcov:
-    needs: pick-runner
+    # runs-on: ubuntu-latest
-    runs-on: ${{ fromJson(needs.pick-runner.outputs.runner) }}
+    runs-on: [self-hosted, ubuntu-latest]
+
 
     steps:
       - uses: actions/checkout@v4
@@ -69,10 +56,12 @@ jobs:
           fi
       
       - name: Export tarpaulin coverage badge JSON
-        # extract raw coverage and round to 2 decimal places
         run: |
+            # extract raw coverage
             coverage=$(jq '.coverage' tarpaulin-report.json)
+            # round to 2 decimal places
             formatted=$(printf "%.2f" "$coverage")
+            # build the badge JSON using the pre-formatted string
             jq --arg message "$formatted" \
               '{schemaVersion:1,
                 label:"tarpaulin-report",

.github/workflows/run-unit-tests.yml

@@ -11,24 +11,11 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  pick-runner:
-    runs-on: ubuntu-latest
-    outputs:
-      runner: ${{ steps.choose.outputs.use-runner }}
-    steps:
-      - uses: actions/checkout@v4
-      - id: choose
-        uses: ./.github/actions/runner-fallback
-        with:
-          primary-runner: "self-hosted,ubuntu-latest"
-          fallback-runner: "ubuntu-latest"
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-
   run-unit-tests:
-    needs: pick-runner
     if: github.event.pull_request.draft == false
     name: run-unit-tests
-    runs-on: ${{ fromJson(needs.pick-runner.outputs.runner) }}
+    # runs-on: ubuntu-latest
+    runs-on: [self-hosted, ubuntu-latest]
     env:
       CARGO_TERM_COLOR: always