[Bug 48213] New: Identify when to update the latest/ executables

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48213

Bug ID: 48213
           Summary: Identify when to update the latest/ executables
           Product: Wine-Testbot
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

The TestBot lets the build and/or Wine VMs provide the following files:

1. TestAgentd.exe
   Only changes when there is a commit to testbot/src/testagentd/ in the tools
repository.

2. TestLauncher32.exe & TestLauncher64.exe
   Only changes when there is a commit to testbot/src/TestLauncher/ in the
tools repository.

3. winetest32.exe & winetest64.exe (future, see bug 47840)
   Changes whenever Wine is updated.

4. winefiles.txt &  wine-parentsrc.txt
   Changes whenever Wine is updated. (but these should go away, see bug 48033)

Currently all files are always retrieved by WineRunReconfig, whether they may
have changed or not. With one build and one wine VM this means they are
retrieved twice a day.

This can be improved a bit by retrieving the TestAgentd and TestLauncher
binaries only from build VMs since they are not needed if there is no build VM.

Ideally they would only be downloaded if they have changed, and only once in
case there are multiple wine VMs for instance. This would also allow
WineRunReconfig to determine more accurately when to restart TestAgentd.

The way to do so would be for the build scripts to provide a BuildID for each
binary in the build log, and to cache this id on the server. WineRunReconfig
would then download the new binaries only when the build id in the log differs
from the cached one.