SSO stores token file in random location

[justinmk3]

Problem

SSO auth implementation stores the cache token to whatever directory it happens to be installed to:

language-servers/server/device-sso-auth-lsp/src/language-server/sso/builderId.ts

Line 15 in 17a6f6f

const TOKEN_CACHE_DIR = path.join(__dirname, '.cache')

Expected behavior

• Consumer application (e.g. IDE extensions) can control the storage location.
• Default behavior should store token in the (quasi) standard ~/.aws/sso/... location.
• Ideally, it should also try to re-use token already found in that location which may have been set by other tools.

[sadderchris]

I use nix, which installs all of its artifacts to an immutable store directory. This assumes that the directory it's loaded from is always writable however, which obviously won't be the case here. Can this use the user's configured XDG_CACHE_HOME for this purpose perhaps, since it appears to be writing something to a cache in this case?

[justinmk3]

@sadderchris the default will be ~/.aws/sso/cache does that work for you? Though, the lsp should plan to support XDG basedirs eventually...

[sadderchris]

I think this will be fine, as long as it doesn't try to write to a directory alongside where the actual library is stored. XDG basedir support would be even better, but I can live without it for now.