Merge pull request #3 from xmidt-org/tag

Create tag.yml

.github/workflows/tag.yml

@@ -0,0 +1,28 @@
+name: tag
+
+on:
+  push:
+    paths:
+      - "CHANGELOG.md" # only try to tag if the CHANGELOG has been updated.
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: [ ubuntu-latest ]
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          token: '${{ secrets.PERSONAL_ACCESS_TOKEN }}'
+          fetch-depth: 0
+      - name: set up bot
+        run: |
+          git config --global user.name "xmidt-bot"
+          git config --global user.email "$BOT_EMAIL"
+      - name: export variables and tag commit
+        run: |
+          export OLD_VERSION=$(git describe --tags `git rev-list --tags --max-count=1` | tail -1)
+          export TAG=$(cat CHANGELOG.md | perl -0777 -ne 'print "$1" if /.*## \[Unreleased\]\s+## \[(v\d+.\d+.\d+)\].*/s')
+          export TODAY=`date +'%m/%d/%Y'`
+          export NOTES=$(cat CHANGELOG.md | perl -0777 -ne 'print "$ENV{TODAY}\n\n$1\n" if /.*## \[$ENV{TAG}\]\s(.*?)\s+## \[(v\d+.\d+.\d+)\].*/s')
+          if [[ "$TAG" != "" && "$TAG" != "$OLD_VERSION" ]]; then git tag -a "$TAG" -m "$NOTES"; git push origin --tags; echo $?; fi