[JIRA] [core] (JENKINS-24380) Use build numbers as IDs

Mon, 15 Sep 2014 11:53:59 -0700

Copying the IRC conversation:

(11:39:48 AM) jglick: kohsuke: I know you are alive https://github.com/jenkinsci/jenkins/pull/1379 do not try to hide from me :-)
(11:40:17 AM) kohsuke: Yes, I'm alive
(11:41:34 AM) kohsuke: This is a scary change
(11:43:29 AM) kohsuke: jglick: you sure about automatically running the migration script? I assume it means it won't be downgradable
(11:44:16 AM) jglick: kohsuke: correct it is not downgradable (well, without losing build records I mean). But that is necessary to get the benefits of code simplification.
(11:46:12 AM) jglick: And yes it is a scary change, but then again the current situation is to me scarier.
(11:46:35 AM) kohsuke: does it try to create symlink from build ID to the number dir?
(11:47:01 AM) jglick: kohsuke: no. Why?
(11:47:02 AM) kohsuke: Looks like not. The ID as timestamp is completely gone
(11:47:21 AM) jglick: The timestamp becomes a regular field in build.xml.
(11:47:54 AM) kohsuke: I thought perhaps the way to go is to start switching around timestamp=dir & number=symlink
(11:48:17 AM) kohsuke: presumably that would still allow you for lazy loading to try to find a match deterministically in one go
(11:48:18 AM) jglick: What is the advantage to having symlinks for the timestamp?
(11:48:29 AM) kohsuke: for compatibility
(11:48:34 AM) jglick: The five mentioned plugins need to be updated anyway.
(11:48:42 AM) jglick: So there is no compatibility concern for them.
(11:49:26 AM) jglick: (Once they are fixed to expect the new layout, I mean.)
(11:51:21 AM) kohsuke: I'm trying to think of ways to avoid doing large irreversible edits to $JENKINS_HOME
(11:51:50 AM) kohsuke: Leaving the timestamp as symlink and not renaming existing directories would let you do that
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