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