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It saves some boilerplate.
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Bootstrap chunks don't make it into the final system, so there needs to
be an extra check for empty systems after the sources have been collected.
This was complicated slightly by the fact that if you try to build a chunk
directly you will have no strata in your sources, hence no non-bootstrap
chunks, but validation for having been told to build a chunk is best
handled later.
This amends the old yarns that depended on building a bootstrap chunk
and adds a new one that explicitly builds a system with bootstrap
chunks.
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It doesn't currently make sense to build a system which contains no
strata. We may later add other fields, such as initramfs to contribute
to the system's artifact, but until then it's another bug to trip over.
This uses collections.Sequence for checking the type of the systems entry
in the morphology as a style choice, though it allows more flexibility
if the types in the parsed morphology change.
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This was omittted from the MorphologyLoader due to cluster morphologies
being added at about the same time.
This bug escaped detection since the MorphologyLoader was not required
to deploy. It soon will be.
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Dedicated exceptions allow more fine-grained exception catching and can
have extra data.
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Set -e meant that the stderr could never be re-output, catching the
return code and re-outputting was not sufficient.
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Reviewed-by: Lars Wirzenius
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'remotes/origin/baserock/ps/show-stratum-versions-in-build'
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'origin/baserock/richardmaw/S9475/build-refactor-foundations-v2'
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This adds a LocalRefManager, which handles ref updates to local
repositories (i.e. your workspace).
It provides proxy methods for ref updates to a set of repositories.
If an exception occurs in the body of the context manager, the updates
will be rolled back to before the context manager was entered.
The purpose for using a LocalRefManager instead of making the changes to
the repositories directly, is to provide atomic updates to a set of refs
in a set of repositories, where all refs are updated, or none are.
This also adds a RemoteRefManager, which handles pushing branches to
remote repositories.
It provides a proxy push method, which will delete pushed branches, and
re-push deleted branches after the context manager exits.
Its purpose, instead of providing atomic updates to remote repositories,
is to provide temporary branches. This is because it is used to provide
temporary build branches. The difference between atomic update and
temporary push, is that the remote branches are deleted when the context
is left, rather than kept, as LocalRefManager does.
The RemoteRefManager currently cannot provide the same atomicity
guarantees as the LocalRefManager, so if there is a push between the
branch being created and the RemoteRefManager cleaning it up, that change
is lost without RemoteRefManager even knowing it existed.
Git 1.8.5 will add functionality to make this possible.
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Remotes have a push method, which takes multiple RefSpecs, runs git push
using arguments derived from the set of refspecs, then returns the
push's result.
If it fails the push, it will return the result in the exception.
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Operations on remotes are now accessed through this proxy object.
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This is used to create commit objects. This is used by build without
commit to provide the behind-the-scenes history.
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This generates a tree object from the index.
This can then be used to create a commit.
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This is like GitIndex.add_files_from_index_info, but uses the working
tree and a list of paths. This is more convenient when the changes exist
in the working tree.
The comment describes its relationship with
GitIndex.add_files_from_index_info, but it is faster, since it calls out
to `git add` rather than calling out to `git hash-object` for every file.
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This is used to add files directly to the index, without touching the
working tree. This is used in the build without commit code for creating
new morphologies pointing to different branches.
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This is used to set the state of the index to that of a previously known
commit. This is needed for the build without commit logic, so that
commits generated are that of the last commit in the repository and
anything uncommitted.
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This represents the state of the index of a GitDirectory.
Methods that use the index are now used via the GitIndex class, rather
than using the default index, as previously used when the methods were
in GitDirectory.
GitIndex may be constructed with an alternative path, which can be used
to manipulate a git checkout without altering a developer's view of the
repository i.e. The working tree and default index.
This is needed for `morph build` and `morph deploy` to handle the build
without commit logic.
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This is needed for making commits without touching the workspace.
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This is used to split a large iterable into more manageable chunks.
This is important when a consumer can only handle so much input at once
e.g. A program can take a large, but finite number of arguments, xargs
exists to handle this for shell programs.
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The set of helpers isn't helping for re-usability, since every new use
for the traverse_specs method is different enough that it is only used
in one place.
So just export traverse_specs itself and be done with it.
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Some APIs should take SHA1 object IDs, there needs to be a way to get
one from a ref. To handle this, we add APIs for getting either the
commit or the tree pointed to by the ref.
Commits are provided because we need to create commits from
existing commits and update refs from existing values.
Trees are provided because we need trees to create commits, and we can
read trees into the index to eventually create another tree.
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We need to use cat-file for files by SHA1, commits by SHA1 and files by
ref and path, so provide access in separate methods, since while it's
all the same thing "under the hood", it avoids the user needing to know
the command-line syntax.
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Saving the result is useful for the tests, but diagnostics of failures
are quicker if the result is printed to the terminal as well.
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It turns out that only the check-copyright-year script was exiting
properly, but it was not doing the deferred exit that other tests were
doing.
Other tests would set errors=1, then later check the result and exit
if it's non-zero, however the errors variable was set in a sub-shell,
since it was on the right-hand side of a pipe.
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Needed to update copyright years when merging. Don't understand why
the problem didn't show up earlier, since it doesn't seem to have
been caused by Dan's changes.
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Reviewed-by: Richard Ipsum
Reviewed-by: Pedro Alvarez
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This will allow fetching of gtk+ artifacts.
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argument
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Reviewed-by:
Dan Firth: +1
Richard Ipsum: +1
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