Remove dependency on latest/ directory

[daniel-beck]

The update center will stop providing tiered latest/ directories soon.

Please adapt install-plugins.sh to work without that.

I had switched to the new version of the update site generator yesterday, and these issues were filed:
https://issues.jenkins-ci.org/browse/INFRA-2614
#952 (comment)

[slide]

Can you give some details on what the structure will look like?

[daniel-beck]

@slide It's unclear what you're asking. These directories will no longer be generated.

See e.g. https://issues.jenkins-ci.org/browse/INFRA-2615 for a change I plan to implement that will make the existence of update site tiers dependent on what plugins actually declare.

Instead, request /update-center.actual.json?version=2.xyz and download plugins from the URLs specified there.

[slide]

Ok, that makes more sense.

[slide]

One thing I noticed is that if you provide a bogus Jenkins version, e.g., https://updates.jenkins.io/update-center.actual.json?version=4.0 you still get update center information returned. I am not sure if this is desirable in all cases.

[daniel-beck]

@slide In that particular case, we provide the current update site, treating it like the latest weekly. Seems reasonable. 2.0 will be redirected to 2.164, the non-existing 2.0.1 to stable-2.164.

We redirect all 1.x versions to the latest, but it really doesn't make that much of a difference anymore, upgrading core is the only thing that matters. Are you seeing other redirects that don't make sense?

[lemeurherve]

@daniel-beck as the install-plugins.sh script has been removed since #1408, do you think this issue could be closed?

[daniel-beck]

@lemeurherve Probably, do you know whether plugin-installation-manager-tool needs these? Superficially there are references to "latest", but I didn't look close enough to be confident about presence or absence of tiered latest dir references.

[timja]

@lemeurherve Probably, do you know whether plugin-installation-manager-tool needs these? Superficially there are references to "latest", but I didn't look close enough to be confident about presence or absence of tiered latest dir references.

as far as I know it doesn't need them