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fix: handle large presentations with external assets mode (#1090)

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Andrea Liliana Griffiths
2026-03-19 19:26:41 -04:00
committed by GitHub
parent e4fc57f204
commit 07e1e665d6
4 changed files with 212 additions and 59 deletions
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skills/publish-to-pages/SKILL.md
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@@ -34,6 +34,17 @@ Ask the user for a **repo name** if not provided. Default: filename without exte
## 3. Conversion
### Large File Handling
Both conversion scripts automatically detect large files and switch to **external assets mode**:
- **PPTX:** Files >20MB or with >50 images → images saved as separate files in `assets/`
- **PDF:** Files >20MB or with >50 pages → page PNGs saved in `assets/`
- Files >150MB print a warning (PPTX suggests PDF path instead)
This keeps individual files well under GitHub's 100MB limit. Small files still produce a single self-contained HTML.
You can force the behavior with `--external-assets` or `--no-external-assets`.
### HTML
No conversion needed. Use the file directly as `index.html`.
@@ -41,6 +52,8 @@ No conversion needed. Use the file directly as `index.html`.
Run the conversion script:
```bash
python3 SKILL_DIR/scripts/convert-pptx.py INPUT_FILE /tmp/output.html
# For large files, force external assets:
python3 SKILL_DIR/scripts/convert-pptx.py INPUT_FILE /tmp/output.html --external-assets
```
If `python-pptx` is missing, tell the user: `pip install python-pptx`
@@ -48,8 +61,10 @@ If `python-pptx` is missing, tell the user: `pip install python-pptx`
Convert with the included script (requires `poppler-utils` for `pdftoppm`):
```bash
python3 SKILL_DIR/scripts/convert-pdf.py INPUT_FILE /tmp/output.html
# For large files, force external assets:
python3 SKILL_DIR/scripts/convert-pdf.py INPUT_FILE /tmp/output.html --external-assets
```
Each page is rendered as a PNG and base64-embedded into a self-contained HTML with slide navigation.
Each page is rendered as a PNG and embedded into HTML with slide navigation.
If `pdftoppm` is missing, tell the user: `apt install poppler-utils` (or `brew install poppler` on macOS).
### Google Slides
@@ -72,7 +87,9 @@ bash SKILL_DIR/scripts/publish.sh /path/to/index.html REPO_NAME public "Descript
Pass `private` instead of `public` if the user requests it.
The script creates the repo, pushes `index.html`, and enables GitHub Pages.
The script creates the repo, pushes `index.html` (plus `assets/` if present), and enables GitHub Pages.
**Note:** When external assets mode is used, the output HTML references files in `assets/`. The publish script automatically detects and copies the `assets/` directory alongside the HTML file. Make sure the HTML file and its `assets/` directory are in the same parent directory.
## 5. Output