Add duckdb recipe for emscripten

[wolfv]

Template A: Checklist for adding a package

Pre-submission Checks

• Package requires building for emscripten-wasm32 platform (not a noarch package), in other words, the package requires compilation.

Recipe Structure

Added recipes/recipes_emscripten/[package-name]/recipe.yaml with proper structure:

• context section with version (and optionally name)
• package section with name and version using Jinja2 templates
• source section with:
  • Source URL is valid and points to archive file (.tar.gz, .tar.bz2, .tar.xz, .tgz, or .zip)
  • Source URL contains ${{ version }} template for version updates
  • SHA256 hash is correct (verified with curl -sL <url> | sha256sum)
  • Patches (if any) are included in [package-name]/patches/ directory
• build section with appropriate script/method
  • Python packages: ${PYTHON} -m pip install . ${PIP_ARGS}
  • R packages: $R CMD INSTALL $R_ARGS .
  • C++ packages: Uses emcmake/emmake or emconfigure/emmake
  • Rust packages: Uses rust-nightly and maturin or appropriate Rust build tool
  • Build number is 0
  • If the script is longer than 3 lines, a build.sh is included
• requirements section (build, host, run as needed)
• tests section
  • Python packages: test_import_[package].py file created and referenced
  • C++ packages: Test executable or package_contents test
  • R packages: Package contents test
• about section with license, homepage, summary

---

Template B: Checklist for updating a package

• ⚠️ Bump build number if the version remains unchanged
• Or reset build number to 0 if updating the package to a newer version

---

PR Formatting

• PR title follows format: Add [package-name] or Update [package-name] to [version]
• PR description includes:
  • Version being added/updated
  • Any special build considerations or patches applied

Package Details

• Package Name:
• Version:

Build Notes

[wolfv]

@IsabelParedes it works! The lint problem is due to using git sources. The reason for that is that the splitted duckdb pulls in duckdb as a git submodule. We could possibly workaround that but using the git source is a bit more convenient.

[wolfv]

If you allow --experimental, this would work and "pin" the tag to a commit.

[IsabelParedes]

We do allow experimental for a couple of recipes, you could add this package too

recipes/emci/rattler_build.py

Lines 19 to 20 in 2e05d5e

	if (recipe == "arrow") or (recipe == "thrift"):
	cmd.extend(["--experimental"])

[IsabelParedes]

@IsabelParedes it works! The lint problem is due to using git sources. The reason for that is that the splitted duckdb pulls in duckdb as a git submodule. We could possibly workaround that but using the git source is a bit more convenient.

We try to avoid git sources because the Version Bot currently cannot update packages that do not have ${{ version }} in the source url. So this package would have to be updated manually. But that's fine for now :)