Add action to generate pdf diff #1
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| name: Generate Rendered Diff PDFs | |
| on: | |
| pull_request: | |
| types: [opened, synchronize, reopened] | |
| branches: | |
| - main | |
| jobs: | |
| generate_pdfs: | |
| runs-on: ubuntu-latest | |
| steps: | |
| - name: Checkout code | |
| uses: actions/checkout@v3 | |
| with: | |
| fetch-depth: 0 # Fetch full history to compare branches | |
| - name: Install dependencies | |
| run: | | |
| sudo apt-get update | |
| sudo apt-get install -y pandoc texlive-latex-base texlive-latex-extra texlive-fonts-recommended latexdiff latexmk ghostscript | |
| mkdir -p old_version new_version diffs pdfs | |
| - name: Fetch main branch | |
| run: | | |
| git fetch origin main | |
| - name: Generate rendered diffs and PDFs | |
| run: | | |
| # Get list of modified markdown files | |
| MODIFIED_FILES=$(git diff --name-only origin/main...HEAD -- '*.md') | |
| echo "Modified markdown files:" | |
| echo "$MODIFIED_FILES" | |
| mkdir -p pdfs | |
| COMBINED_DIFFS="" | |
| for FILE in $MODIFIED_FILES; do | |
| echo "Processing $FILE" | |
| # Extract old version from main branch | |
| git show origin/main:"$FILE" > old_version/"$(basename "$FILE")" | |
| # Copy new version | |
| cp "$FILE" new_version/ | |
| # Convert both versions to LaTeX | |
| pandoc old_version/"$(basename "$FILE")" -o old_version/"$(basename "$FILE" .md)".tex | |
| pandoc new_version/"$(basename "$FILE")" -o new_version/"$(basename "$FILE" .md)".tex | |
| # Run latexdiff to get the diffed LaTeX file | |
| latexdiff old_version/"$(basename "$FILE" .md)".tex new_version/"$(basename "$FILE" .md)".tex > diffs/"$(basename "$FILE" .md)"_diff.tex | |
| # Compile the diffed LaTeX file to PDF | |
| cd diffs | |
| latexmk -pdf -quiet "$(basename "$FILE" .md)"_diff.tex | |
| cd .. | |
| # Move the generated PDF to the pdfs directory | |
| mv diffs/"$(basename "$FILE" .md)"_diff.pdf pdfs/ | |
| # Append to combined diffs | |
| COMBINED_DIFFS="$COMBINED_DIFFS \includepdf[pages=-]{pdfs/$(basename "$FILE" .md)_diff.pdf}" | |
| done | |
| # Generate combined PDF if there are diffs | |
| if [ -n "$COMBINED_DIFFS" ]; then | |
| echo "\documentclass{article} | |
| \usepackage{pdfpages} | |
| \begin{document} | |
| $COMBINED_DIFFS | |
| \end{document}" > combined_diff.tex | |
| latexmk -pdf -quiet combined_diff.tex | |
| mv combined_diff.pdf pdfs/ | |
| fi | |
| - name: Upload PDFs | |
| uses: actions/upload-artifact@v3 | |
| with: | |
| name: rendered_diff_pdfs | |
| path: pdfs/ | |
| - name: Comment on PR with download link | |
| uses: actions/github-script@v6 | |
| with: | |
| script: | | |
| const artifactUrl = `https://github.com/${context.repo.owner}/${context.repo.repo}/actions/runs/${process.env.GITHUB_RUN_ID}`; | |
| github.rest.issues.createComment({ | |
| issue_number: context.issue.number, | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| body: `📄 Rendered diff PDFs have been generated and uploaded as artifacts for this workflow run. You can download them from the [Artifacts section of the workflow run](${artifactUrl}).` | |
| }); |