juliaup update fails due to missing ETag header

[LilithHafner]

x@x:~$ juliaup update
Error: Failed to update versions db.

Caused by:
    ETag header not found in response
x@x:~$ juliaup --version
Juliaup 1.17.4

My internet seems fine (I'm posting this issue from the same internet as I received the error message from).

If this is a network issue, it should be more clear in the error message. Otherwise it is likely a bug.

[Zentrik]

I fixed this for me by removing some Julia channels I had installed, namely 1.7, pr54848, pr55412, pr56130 (I'm assuming something is going wrong with the pr handling, presumably the files get deleted from S3 or whatever after a while)

[Zentrik]

I presume we need to handle PRs separately here as after some time they will no longer be available,

juliaup/src/operations.rs

Lines 1587 to 1601 in 72d844e

	for (channel_name, channel) in &config_data.installed_channels {
	if let JuliaupConfigChannel::DirectDownloadChannel { url, .. } = channel {
	let etag = client
	.head(url)
	.send()?
	.headers()
	.get("etag")
	.ok_or_else(|| anyhow!("ETag header not found in response"))?
	.to_str()
	.map_err(|e| anyhow!("Failed to parse ETag header: {}", e))?
	.to_string();
	requests.push((channel_name.clone(), etag));
	}
	}