Create autorelease

.github/workflows/main.yml

@@ -0,0 +1,44 @@
+name: Build LaTeX document & latexdiff to previous tagged version.
+on: [push, pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout new version
+        uses: actions/checkout@v2
+        with:
+          path: new
+          fetch-depth: 0
+      - name: Set last tag value
+        run: |
+          echo ::set-output name=LAST_TAG_NAME::"$(cd new && git describe --tag HEAD^ --abbrev=0)"
+        id: tag_val_stp
+      - name: Checkout old version
+        uses: actions/checkout@v2
+        with:
+          path: old
+          ref: ${{ steps.tag_val_stp.outputs.LAST_TAG_NAME }}
+      - name: Compile LaTeX document
+        uses: xu-cheng/latex-action@v2
+        with:
+          root_file: whitepaper.tex
+          working_directory: new/
+      - name: Install latexdiff
+        run: sudo apt-get install latexdiff
+      - name: Run latexdiff
+        run: latexdiff -t UNDERLINE --verbose --no-links --flatten old/whitepaper.tex new/whitepaper.tex > new/diff.tex
+      - name: Compile LaTeX difference document
+        uses: xu-cheng/latex-action@v2
+        with:
+          root_file: diff.tex
+          working_directory: new/
+      - name: Check pdf files
+        run: |
+          file new/diff.pdf | grep -q ' PDF '
+      - name: Upload
+        uses: actions/upload-artifact@v2
+        with:
+          name: paper
+          path: |
+            new/diff.pdf
+            new/whitepaper.pdf