Created attachment 3060 [details]
main build page

It will be good to access bitbake error logs trough the buildbot web interface, i did an implementation before to see how it looks review the attachment.

Details:

I worked on the AB code for publish test logs, the patch [1] had the problem of access to workers logs because is using open call directly from controller and it will fail because the patch only exists in the worker.

So the problem to solve is how to access worker logs, i decided to use a
HTTP server because the implementation for get logs is in
commandComplete callback in ShellCommand at this stage we can't execute
another step like FileDownload also we can't add more steps dynamically
after the current one (a function exists but our buildbot version seems
to be old).

Now the worker could start a Twisted HTTP Server for serve files. there
is a variable in config/autobuilder.conf for enable the server. Then if
bitbake command fails and Worker http server is enabled it parses the
log paths and request trough HTTP the log file for dump it to buildbot
logs. There are a limitation about the builderslave name need to be the
host name of the machine, this limitation don't affect us since our AB
infrastructure uses hostnames as buildslave names. [2]

[1] https://lists.yoctoproject.org/pipermail/yocto/2016-February/028822.html
[2] http://git.yoctoproject.org/cgit/cgit.cgi/yocto-autobuilder/log/?h=contrib/alimon/devel_http