replace hashids (bashids) with sqids

[Pinjasaur]

https://sqids.org/bash

this'll be a breaking change because the IDs (used in the RSS feed) will change, but it'll also simply it all slightly by removing the SALT envar

[mfossen]

Will this cause any issues (dupes etc.) to be sent via RSS after the change?

[Pinjasaur]

yeah, it will cause dupes. I ended up ripping the bandaid off and doing this on my own a blog a couple years back: https://paul.af/breaking-rss-feed-changes

it's used like this right now: https://github.com/Pinjasaur/bic-example/blob/e4ef0ef54f175c4abc05e74f81e93277f49dc148/__feed.rss#L4-L5

here's the spec for guid: https://www.rssboard.org/rss-draft-1#element-channel-item-guid

here's the current implementation of mk_id as part of bic's internals:

bic/bic

Lines 106 to 114 in 5ebb854

	mk_id() {
	local id="${1%-"${2}"}"
	if ! echo "${id:-}" | grep -Eq '^[[:digit:]]+$'; then
	fatal "Number prefix is required: ${1}"
	fi
	local hashid
	hashid="$("${__dir}"/lib/bashids -e -s "${SALT:-bic}" -l 28 "${id}")"
	echo "${__base}_${hashid}"
	}

it's imperfect, but I was intentional about doing it this way to still allow for changing the filename e.g. 000-foo.md -> 000-bar.md will go from /foo to /bar but will retain the same underlying id which will prevent dupes

I don't have a better idea on handling it offhand. thoughts @mfossen?

[Pinjasaur]

technically, could go with the bare number prefix e.g. 000 from 000-foo.md but wanted to make it more ID-like by using a library like hashids/sqids. there definitely won't be a 100% perfect solution, but I do like this overall: I've been bitten by renaming the files of already-published entries which unfortunately changed the underlying GUID for the RSS feed