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| 1 | +name: Parallelize Tests |
| 2 | + |
| 3 | +on: |
| 4 | + workflow_call: |
| 5 | + inputs: |
| 6 | + environments: |
| 7 | + required: true |
| 8 | + type: string |
| 9 | + parallel_jobs: |
| 10 | + required: false |
| 11 | + type: number |
| 12 | + default: 2 |
| 13 | + java_version: |
| 14 | + required: true |
| 15 | + type: number |
| 16 | + outputs: |
| 17 | + matrix: |
| 18 | + description: "Generated test matrix" |
| 19 | + value: ${{ jobs.prepare.outputs.matrix }} |
| 20 | + |
| 21 | +jobs: |
| 22 | + prepare: |
| 23 | + name: "" |
| 24 | + runs-on: ubuntu-latest |
| 25 | + outputs: |
| 26 | + matrix: ${{ steps.set-matrix.outputs.matrix }} |
| 27 | + steps: |
| 28 | + - name: Generate matrix |
| 29 | + id: set-matrix |
| 30 | + run: | |
| 31 | + # Use environment variables |
| 32 | + N=${{ inputs.parallel_jobs }} |
| 33 | + JAVA_VERSION=${{ inputs.java_version }} |
| 34 | + |
| 35 | + # Convert to array and transform |
| 36 | + IFS=',' read -ra ENVS <<< "${{ inputs.environments }}" |
| 37 | + TRANSFORMED=() |
| 38 | + for env in "${ENVS[@]}"; do |
| 39 | + TRANSFORMED+=("java${JAVA_VERSION}/paper-${env}") |
| 40 | + done |
| 41 | + |
| 42 | + TOTAL=${#TRANSFORMED[@]} |
| 43 | + |
| 44 | + # avoid creating more jobs than needed |
| 45 | + JOBS=$((TOTAL < N ? TOTAL : N)) |
| 46 | + # environments per job |
| 47 | + BASE=$((TOTAL / JOBS)) |
| 48 | + EXTRA=$((TOTAL % JOBS)) |
| 49 | + |
| 50 | + # Build matrix JSON |
| 51 | + # Format is: |
| 52 | + # [{"id":1,"envs":"java21/paper-1.20.6,java21/paper-1.21.3","display":"1.20.6, 1.21.3"},...] |
| 53 | + # Where "envs" is the actual environment strings and "display" is for easier identification |
| 54 | + MATRIX="[" |
| 55 | + INDEX=0 |
| 56 | + for ((i=0; i<JOBS; i++)); do |
| 57 | + # Determine count for this job (BASE + 1 if i < EXTRA) |
| 58 | + COUNT=$BASE |
| 59 | + if [ $i -lt $EXTRA ]; then |
| 60 | + COUNT=$((COUNT + 1)) |
| 61 | + fi |
| 62 | + |
| 63 | + # Build envs and display strings |
| 64 | + GROUP="" |
| 65 | + DISPLAY_GROUP="" |
| 66 | + for ((j=0; j<COUNT; j++)); do |
| 67 | + if [ -n "$GROUP" ]; then |
| 68 | + GROUP="$GROUP," |
| 69 | + DISPLAY_GROUP="$DISPLAY_GROUP, " |
| 70 | + fi |
| 71 | + GROUP="$GROUP${TRANSFORMED[$INDEX]}" |
| 72 | + DISPLAY_GROUP="$DISPLAY_GROUP${ENVS[$INDEX]}" |
| 73 | + INDEX=$((INDEX + 1)) |
| 74 | + done |
| 75 | + |
| 76 | + # add to matrix with separating comma if needed |
| 77 | + if [ $i -gt 0 ]; then |
| 78 | + MATRIX="$MATRIX," |
| 79 | + fi |
| 80 | + MATRIX="$MATRIX{\"id\":$((i+1)),\"envs\":\"$GROUP\",\"display\":\"$DISPLAY_GROUP\"}" |
| 81 | + done |
| 82 | + MATRIX="$MATRIX]" |
| 83 | + |
| 84 | + echo "matrix={\"include\":$MATRIX}" >> $GITHUB_OUTPUT |
| 85 | + echo "Generated matrix: {\"include\":$MATRIX}" |
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