update_neqsim_jar.yml

name: Update NeqSim JAR

on:
  schedule:
    - cron: "0 */6 * * *"
  workflow_dispatch:
    inputs:
      version:
        description: Optional NeqSim version override (for example 3.14.0-Java8)
        required: false
        type: string

permissions:
  contents: write
  pull-requests: write

jobs:
  update-jar:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Resolve version and download JAR from Maven Central
        id: download
        env:
          REQUESTED_VERSION: ${{ inputs.version || '' }}
        run: |
          set -euo pipefail

          git config --global diff.renames no

          BASE_URL="https://repo1.maven.org/maven2/com/equinor/neqsim/neqsim"
          METADATA_URL="$BASE_URL/maven-metadata.xml"

          add_candidate() {
            local candidate="$1"
            if [[ -z "$candidate" ]]; then
              return
            fi
            for existing in "${candidates[@]:-}"; do
              if [[ "$existing" == "$candidate" ]]; then
                return
              fi
            done
            candidates+=("$candidate")
          }

          normalize_java8_version() {
            local version="$1"
            version="${version#refs/tags/}"
            version="${version#v}"
            if [[ "$version" != *-Java8 ]]; then
              version="${version}-Java8"
            fi
            printf '%s' "$version"
          }

          add_variants() {
            local version="$1"
            if [[ -z "$version" ]]; then
              return
            fi

            add_candidate "$(normalize_java8_version "$version")"
          }

          candidates=()
          requested="${REQUESTED_VERSION#refs/tags/}"
          add_variants "$requested"

          metadata="$(curl -fsSL "$METADATA_URL")"
          release_version="$(printf '%s' "$metadata" | tr -d '\n' | sed -n 's:.*<release>\(.*\)</release>.*:\1:p')"
          add_variants "$release_version"

          selected_version=""
          selected_url=""
          for version in "${candidates[@]}"; do
            url="$BASE_URL/$version/neqsim-$version.jar"
            if curl -fsI "$url" > /dev/null; then
              selected_version="$version"
              selected_url="$url"
              break
            fi
          done

          if [[ -z "$selected_version" ]]; then
            echo "Unable to resolve a downloadable NeqSim JAR version from Maven Central." >&2
            echo "Tried candidates: ${candidates[*]}" >&2
            exit 1
          fi

          if [[ "$selected_version" != *-Java8 ]]; then
            echo "Resolved version is not a Java8 artifact: $selected_version" >&2
            exit 1
          fi

          current_jar="$(ls ext/neqsim-*.jar 2>/dev/null | head -n 1 || true)"
          current_version=""
          if [[ -n "$current_jar" ]]; then
            current_name="$(basename "$current_jar")"
            current_version="${current_name#neqsim-}"
            current_version="${current_version%.jar}"
          fi

          if [[ "$selected_version" == "$current_version" ]]; then
            echo "NeqSim JAR already up to date: $selected_version"
            echo "updated=false" >> "$GITHUB_OUTPUT"
            echo "version=$selected_version" >> "$GITHUB_OUTPUT"
            echo "jar_name=neqsim-$selected_version.jar" >> "$GITHUB_OUTPUT"
            echo "download_url=$BASE_URL/$selected_version/neqsim-$selected_version.jar" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          jar_name="neqsim-$selected_version.jar"
          curl -fsSL "$selected_url" -o "$jar_name"

          old_jar="$(ls ext/neqsim-*.jar 2>/dev/null | head -n 1 || true)"
          if [[ -n "$old_jar" ]]; then
            git rm -f "$old_jar"
          fi

          mv "$jar_name" "ext/$jar_name"
          git add "ext/$jar_name"

          echo "updated=true" >> "$GITHUB_OUTPUT"
          echo "version=$selected_version" >> "$GITHUB_OUTPUT"
          echo "jar_name=$jar_name" >> "$GITHUB_OUTPUT"
          echo "download_url=$selected_url" >> "$GITHUB_OUTPUT"

      - name: Create Pull Request
        if: steps.download.outputs.updated == 'true'
        uses: peter-evans/create-pull-request@v6
        with:
          commit-message: "chore: update neqsim jar to ${{ steps.download.outputs.version }}"
          title: "chore: update neqsim jar to ${{ steps.download.outputs.version }}"
          body: |
            Automated update of NeqSim JAR in `ext`.

            - Source: Maven Central
            - Version: `${{ steps.download.outputs.version }}`
            - Artifact: `${{ steps.download.outputs.jar_name }}`
            - URL: `${{ steps.download.outputs.download_url }}`

            Triggered by `${{ github.event_name }}`.
          branch: "chore/update-neqsim-jar-${{ steps.download.outputs.version }}"
          delete-branch: true