update-release-tag.yaml

# Automatically moves the major tag vX when vX.Y.Z is created

name: Update release tag

on:
  push:
    tags:
    - v*

jobs:
  update-release-tag:
    runs-on: ubuntu-latest
    steps:
    - name: Get repo HEAD ref
      id: new-tag
      uses: actions/github-script@v7
      with:
        script: |
          
          const parsed = context.ref.match(/^refs\/tags\/(?<minor>(?<major>v\d+)\.\d+)\.\d+$/) 
          if (!parsed) {
            console.log(`Ignoring tag ${context.ref} - not a semver release tag.`);
            return;
          }
          
          const response = await github.rest.git.getRef({ 
            ref: `heads/${context.payload.repository.default_branch}`, 
            owner: context.repo.owner, 
            repo: context.repo.repo 
          });
          
          const repoHeadSha = response.data.object.sha;
          
          if (repoHeadSha !== context.sha) {
            console.log(`Ignoring tag at ${context.sha}, because repo HEAD is at ${repoHeadSha}.`);
            return;
          }
          
          console.log(`Parsed major: ${parsed.groups.major}`);
          core.setOutput('major', parsed.groups.major);

          console.log(`Parsed minor: ${parsed.groups.minor}`);
          core.setOutput('minor', parsed.groups.minor);


    - name: Move major tag ${{ steps.new-tag.outputs.major }}
      if: ${{ steps.new-tag.outputs.major }}
      uses: actions/github-script@v7
      with:
        script: |

          try {
            await github.rest.git.deleteRef({
              ref: `tags/${{ steps.new-tag.outputs.major }}`,
              owner: context.repo.owner,
              repo: context.repo.repo
            });
            console.log(`Deleted tags/${{ steps.new-tag.outputs.major }}.`);
          }
          catch (e) {
            console.log(`IGNORED ERROR: failed to delete tags/${{ steps.new-tag.outputs.major }} - assuming it never existed: ${e}`);
          }

          await github.rest.git.createRef({
            ref: `refs/tags/${{ steps.new-tag.outputs.major }}`,
            sha: context.sha,
            owner: context.repo.owner,
            repo: context.repo.repo
          });
          console.log(`Created tags/${{ steps.new-tag.outputs.major }} at ${context.sha}.`);

    - name: Move minor tag ${{ steps.new-tag.outputs.minor }}
      if: ${{ steps.new-tag.outputs.minor }}
      uses: actions/github-script@v7
      with:
        script: |

          try {
            await github.rest.git.deleteRef({
              ref: `tags/${{ steps.new-tag.outputs.minor }}`,
              owner: context.repo.owner,
              repo: context.repo.repo
            });
          }
          catch (e) {
            console.log(`IGNORED ERROR: failed to delete tags/${{ steps.new-tag.outputs.minor }} - assuming it never existed: ${e}`);
          }

          await github.rest.git.createRef({
            ref: `refs/tags/${{ steps.new-tag.outputs.minor }}`,
            sha: context.sha,
            owner: context.repo.owner,
            repo: context.repo.repo
          });
          console.log(`Created tags/${{ steps.new-tag.outputs.minor }} at ${context.sha}.`);