remove comment step and second checkout

.github/workflows/ci.yml

@@ -10,17 +10,17 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
-    - name: Set up Python
-      uses: actions/setup-python@v4
-      with:
-        python-version: '3.12.2'
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install -r scripts/requirements.txt
-    - name: Run pytest
-      run: pytest
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.12.2'
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r scripts/requirements.txt
+      - name: Run pytest
+        run: pytest
 
   build:
     runs-on: ubuntu-latest
@@ -29,7 +29,7 @@ jobs:
       - uses: actions/checkout@v4
         with: 
           fetch-depth: 0
-          
+
       - name: Configure Git safe directory with GITHUB_WORKSPACE
         run: git config --global --add safe.directory "$GITHUB_WORKSPACE"
 
@@ -38,80 +38,70 @@ jobs:
         run: |
           cmake --version
           pdflatex --version
-          
-          # Create and enter the build directory.
           mkdir -p build && cd build
           cmake ..
           make
 
-      # Prepare the "original" version from the default branch.
-      - name: Checkout default branch for diff
+      # Fetch default branch
+      - name: Fetch default branch
         run: |
           git fetch origin ${{ github.event.repository.default_branch }}
-          git worktree add original origin/${{ github.event.repository.default_branch }}
 
-      # Run latexdiff on each document.
+      # Run latexdiff on each document by retrieving the original .tex file from the default branch.
       - name: Run latexdiff on documents
         run: |
           # Install latexdiff if not present
           apt-get install -y latexdiff
           
           # Create a directory to hold diff outputs.
           mkdir -p diff
-          
+          mkdir -p temp
+
           # Loop over each PDF in the build folder.
           for pdf in build/*.pdf; do
             # Extract the basename (e.g. "document" from "document.pdf")
             filename=$(basename "$pdf" .pdf)
             
-            if [ -f "$filename.tex" ] && [ -f original/"$filename.tex" ]; then
-              echo "Running latexdiff on $filename.tex"
-              # Generate a diff TeX file.
-              latexdiff original/"$filename.tex" "$filename.tex" > diff/"${filename}_diff.tex"
-              # Compile the diff file to produce a diff PDF.
-              pdflatex -output-directory=diff diff/"${filename}_diff.tex"
+            if [ -f "$filename.tex" ]; then
+              # Check if the file exists in the default branch using git cat-file.
+              if git cat-file -e origin/${{ github.event.repository.default_branch }}:"$filename.tex" 2>/dev/null; then
+                echo "Running latexdiff on $filename.tex"
+                # Retrieve the file from the default branch directly into a temporary file.
+                git show origin/${{ github.event.repository.default_branch }}:"$filename.tex" > temp/"$filename"_old.tex
+                # Generate a diff TeX file using the original (default branch) and current file.
+                latexdiff temp/"$filename"_old.tex "$filename.tex" > diff/"${filename}_diff.tex"
+                # Compile the diff file to produce a diff PDF.
+                pdflatex -output-directory=diff diff/"${filename}_diff.tex"
+              else
+                echo "Skipping $filename: $filename.tex not found in the default branch."
+              fi
             else
-              echo "Skipping $filename: Corresponding .tex file not found in one of the branches."
+              echo "Skipping $filename: $filename.tex not found in the current branch."
             fi
           done
 
       # Upload the PDFs produced by build.
       - name: Upload build artifact
         uses: actions/upload-artifact@v4
         with:
-          name: build-artifact
+          name: build
           path: build/*.pdf
 
       # Upload the diff PDFs produced by latexdiff.
       - name: Upload latexdiff artifact
         uses: actions/upload-artifact@v4
         with:
-          name: latexdiff-artifact
+          name: latexdiff
           path: diff/*.pdf
 
-      - name: Comment on PR with artifact link
-        if: ${{ github.event_name == 'pull_request' }}
-        continue-on-error: true
-        uses: actions/github-script@v6
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          script: |
-            const pr_number = context.payload.pull_request.number
-            const run_id = process.env.GITHUB_RUN_ID
-            const run_url = `https://github.com/${context.repo.owner}/${context.repo.repo}/actions/runs/${run_id}`
-            await github.rest.issues.createComment({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              issue_number: pr_number,
-              body: `:robot: The artifacts from this build are available [here](${run_url}).`
-            })
       - name: Prepare Deployment
         if: github.ref == 'refs/heads/master' || github.ref == 'refs/heads/main'
         run: |
           mkdir -p export
           echo "# This branch is for deployment only" >> export/README.md
           cp build/*.pdf export
           cp build/git.id export
+          
       - name: Deploy
         if: github.ref == 'refs/heads/master' || github.ref == 'refs/heads/main'
         uses: JamesIves/[email protected]