actions/factorio-mod-push/action.yml

name: Factorio Mod Push
description: Set version, zip, and upload a Factorio mod to mods.factorio.com

inputs:
  mod-folder:
    description: Path to the Factorio mod root directory (containing info.json)
    required: false
    default: "."
  version:
    description: Semver version string to set in info.json, e.g. 1.0.1
    required: true
  factorio-token:
    description: Factorio API key with ModPortal: Upload Mods permission
    required: true

outputs:
  zip-path:
    description: Absolute path to the generated zip file
    value: ${{ steps.package.outputs.zip-path }}

runs:
  using: composite
  steps:
    - name: Validate inputs
      shell: bash
      run: |
        MOD_FOLDER="${{ inputs.mod-folder }}"
        VERSION="${{ inputs.version }}"

        if [ ! -f "$MOD_FOLDER/info.json" ]; then
          echo "ERROR: info.json not found in $MOD_FOLDER"
          exit 1
        fi

        if ! echo "$VERSION" | grep -qE '^[0-9]+\.[0-9]+\.[0-9]+$'; then
          echo "ERROR: version '$VERSION' does not match semver x.y.z"
          exit 1
        fi

    - name: Set version in info.json
      shell: bash
      run: |
        MOD_FOLDER="${{ inputs.mod-folder }}"
        VERSION="${{ inputs.version }}"
        sed -i 's/"version": *"[^"]*"/"version": "'"$VERSION"'"/' "$MOD_FOLDER/info.json"

    - name: Create README.md if missing
      shell: bash
      run: |
        MOD_FOLDER="${{ inputs.mod-folder }}"
        if [ ! -f "$MOD_FOLDER/README.md" ]; then
          TITLE=$(sed -n 's/.*"title": *"\([^"]*\)".*/\1/p' "$MOD_FOLDER/info.json")
          DESC=$(sed -n 's/.*"description": *"\([^"]*\)".*/\1/p' "$MOD_FOLDER/info.json")
          cat > "$MOD_FOLDER/README.md" <<- EOF
# $TITLE

$DESC
EOF
          echo "Created $MOD_FOLDER/README.md"
        fi

    - name: Read mod name from info.json
      id: modinfo
      shell: bash
      run: |
        MOD_FOLDER="${{ inputs.mod-folder }}"
        NAME=$(sed -n 's/.*"name": *"\([^"]*\)".*/\1/p' "$MOD_FOLDER/info.json")
        echo "name=$NAME" >> $GITHUB_OUTPUT

    - name: Package mod zip
      id: package
      shell: bash
      run: |
        MOD_FOLDER="${{ inputs.mod-folder }}"
        NAME=${{ steps.modinfo.outputs.name }}
        VERSION="${{ inputs.version }}"
        ZIP_NAME="${NAME}_${VERSION}.zip"
        ZIP_PATH="${GITHUB_WORKSPACE}/${ZIP_NAME}"

        TMPDIR=$(mktemp -d)
        cp -r "$MOD_FOLDER/." "$TMPDIR/$NAME/"
        find "$TMPDIR/$NAME" -type d -name node_modules -exec rm -rf {} + 2>/dev/null || true
        find "$TMPDIR/$NAME" -type d -name .git -exec rm -rf {} + 2>/dev/null || true

        cd "$TMPDIR"
        zip -r "$ZIP_PATH" "$NAME/"
        rm -rf "$TMPDIR"

        echo "zip-path=$ZIP_PATH" >> $GITHUB_OUTPUT
        echo "Created $ZIP_PATH"

    - name: Init upload to Factorio mod portal
      id: init
      shell: bash
      run: |
        NAME=${{ steps.modinfo.outputs.name }}

        RESPONSE=$(curl -s -w "\n%{http_code}" \
          -X POST "https://mods.factorio.com/api/v2/mods/releases/init_upload" \
          -H "Authorization: Bearer ${{ inputs.factorio-token }}" \
          -F "mod=$NAME")

        HTTP_CODE=$(echo "$RESPONSE" | tail -n1)
        BODY=$(echo "$RESPONSE" | sed '$d')

        if [ "$HTTP_CODE" -ne 200 ]; then
          echo "ERROR: init_upload failed (HTTP $HTTP_CODE)"
          echo "Response: $BODY"
          exit 1
        fi

        UPLOAD_URL=$(echo "$BODY" | sed -n 's/.*"upload_url": *"\([^"]*\)".*/\1/p')
        if [ -z "$UPLOAD_URL" ]; then
          echo "ERROR: init_upload failed - no upload_url in response"
          echo "Response: $BODY"
          exit 1
        fi

        echo "upload_url=$UPLOAD_URL" >> $GITHUB_OUTPUT

    - name: Upload zip to Factorio mod portal
      shell: bash
      run: |
        ZIP_PATH=${{ steps.package.outputs.zip-path }}
        UPLOAD_URL=${{ steps.init.outputs.upload_url }}

        RESPONSE=$(curl -s -w "\n%{http_code}" \
          -X POST "$UPLOAD_URL" \
          -F "file=@$ZIP_PATH")

        HTTP_CODE=$(echo "$RESPONSE" | tail -n1)
        BODY=$(echo "$RESPONSE" | sed '$d')

        if [ "$HTTP_CODE" -ne 200 ]; then
          echo "ERROR: upload failed (HTTP $HTTP_CODE)"
          echo "Response: $BODY"
          exit 1
        fi

        if ! echo "$BODY" | grep -q '"success": *true'; then
          echo "ERROR: upload reported failure"
          echo "Response: $BODY"
          exit 1
        fi

        echo "Upload successful: ${{ steps.modinfo.outputs.name }} ${{ inputs.version }}"