rattler_index `write_repodata` should return proper error type instead of anyhow error

[pavelzw]

rattler/crates/rattler_index/src/lib.rs

Lines 714 to 720 in dd33886

	pub async fn write_repodata(
	repodata: RepoData,
	repodata_patch: Option<PatchInstructions>,
	subdir: Platform,
	op: Operator,
	metadata: &RepodataMetadataCollection,
	) -> Result<()> {

would be nice if we had a proper error type here

[DCchoudhury15]

Hi — I’d like to take this on.

I looked through write_repodata in crates/rattler_index/src/lib.rs and agree that returning a concrete error type would make the API easier to use and test.

[pavelzw]

Feel free to take this on! I'm happy to review afterwards