tag-and-release.yml

name: "Tag and create release draft"

on:
  push:
    branches:
      - releases/*

jobs:
  gh_tagged_release:
    runs-on: "ubuntu-latest"

    steps:
      - uses: actions/checkout@v2
        with:
          fetch-depth: 0
      - name: Test release
        run: |
          sudo npm install n 
          sudo n latest
          npm test
      - name: Get branch ending
        run: echo "##[set-output name=branch;]$(echo ${GITHUB_REF##*/} | sed 's:.*/::')"
        id: extract-branch
      - name: Get tags
        run: |
          echo "##[set-output name=tags;]$(echo $(git tag))"
        id: extract-tags
      - name: Get latest tag
        uses: actions/github-script@v5
        env:
          TAGS: ${{ steps.extract-tags.outputs.tags }}
          BRANCH: ${{ steps.extract-branch.outputs.branch }}
        with:
          script: |
            const tags = process.env["TAGS"]
              .split(" ")
              .map((x) => x.trim());
            const branch = process.env["BRANCH"];
            const splitTag = (x) =>
              x
                .substring(branch.length + 1)
                .split(".")
                .map((x) => Number(x));
            function compareTags(nums1, nums2, position = 0) {
              if (nums1.length < position && nums2.length < position) return nums2;
              const num1 = splitTag(nums1)[position] || 0;
              const num2 = splitTag(nums2)[position] || 0;
              if (num1 === num2) return compareTags(nums1, nums2, position + 1);
              else if (num1 > num2) return nums1;
              else return nums2;
            }
            const branchTags = tags.filter((tag) => tag.startsWith(branch));
            if (branchTags.length < 1) return branch + ".-1"
            return branchTags.reduce((prev, curr) => compareTags(prev, curr));
          result-encoding: string
        id: get-latest-tag
      - name: Get new tag
        uses: actions/github-script@v5
        env:
          PREV: ${{ steps.get-latest-tag.outputs.result }}
        with:
          script: |
            let version = process.env["PREV"]
            if (!version.includes(".")) version += ".0"; // case of v1 or v2
            const prefix = /^([a-zA-Z]+)/.exec(version)[0];
            const numbers = version.substring(prefix.length);
            let split = numbers.split(".");
            split[split.length - 1] = parseInt(split[split.length - 1]) + 1;
            return prefix + split.join(".");
          result-encoding: string
        id: get-new-tag
      - uses: "marvinpinto/action-automatic-releases@v1.2.1"
        with:
          title: ${{ steps.get-new-tag.outputs.result }} release
          automatic_release_tag: ${{ steps.get-new-tag.outputs.result }}
          repo_token: "${{ secrets.GITHUB_TOKEN }}"
          draft: true