| Commit message (Collapse) | Author | Age | Files | Lines |
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Also, rename the syslinux-disk builder plugin file to make it clear
it's a system builder plugin.
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Mea culpa. I managed to make changes without running ./check properly.
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The artifact cache doesn't need to know the whole of an artifact object
to be able to retrieve something from the cache, just the basename.
This can be generated from the contents, or just saved itself.
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The helper class, Factory, has unit tests, which is why it's currently
separate. It may later get integrated with BlobBuilder, or the other
way around.
Classes that don't have unit tests are marked out of coverage.
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This commit introduces four new classes:
BuildController:
* takes an app instance and a tempdir
* allows to add BuildWorker objects
* provides a build() method that takes a set of blobs and
a build order that is then built by assigning work to the
build workers as needed
* the build() method takes care of polling the workers for
their state, moving them between busy and idle states
reliably, collect and print their output in a non-confusing
order, and makes sure to wait for all workers to finish
before processing the next group in the build order.
* at this point, when waiting for one or more workers to
become idle to assign them another blob to build, the
controller always picks the worker that has been idling
for the longest period of time. this can be changed later.
BuildWorker:
* base class for all worker classes
* takes a name and an app instance
* has a idle_since datetime property
* provides a build() method that takes a Blob object and builds
it in whatever way the subclasses implement it
* provides a check_complete(timeout) method that checks whether
the worker has finished building the blob yet or not
LocalBuildWorker:
* worker class for local builds that don't go through SSH
* it uses morphlib.execute.Execute to run morph in a child process
in build()
* at the moment, this class executes "./morph" instead of "morph"
as it assumes the user to run morph from its source tree. obviously,
this will have to be fixed later.
RemoteBuildWorker:
* doesn't implement anything yet, will be used for distributing
work to other machines running morph via SSH
Notes:
* At the moment, there is a degree of undesired redundancy when
building a stratum in a worker, as this will cause the worker to
rebuild all its dependencies. This will have to be fixed as it is
avoidable and wastes a lot of time and processing power.
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