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This is part of taking over from librpm. The most important high
level goal is fully unprivilged operation.
Right now we're basically starting to do what
http://libguestfs.org/supermin.1.html does, except in C, and
faster.
There's no reason that `compose tree` should require privileges.
However right now, things like `%post` scripts will want to run in the
target root - so we'd have to require `linux-user-chroot`.
Regardless of unprivileged operation though, another major thing we
can do is use our control over the unpacking process to do a lot more
sophisticated caching. We can build up a precise mapping of (rpm
ENVR, file path, selinux label) -> object and avoid rechecksumming
each time.
And even for files that aren't known, we can parallelize commit with
unpacking, etc. (Ok assuming treecompose-post won't mutate anything).
I'd like to experiment with different things that end up
reusing chunks of the rpm-ostree internals, such as libhif, the
helpers we already have around RPM, etc.
In this particular case I'm experimenting with unpacking/committing
RPM packages as non-root. Eventually most of this should end up as
internal private shared library, but it's convenient to have an
ABI-unstable and hidden "internals" command to run things directly.
This commit though just adds the scaffolding for "internals".
As we start to do more package things, extract common helper functions
around HifContext * that by default operates on the system root.
Some of these bits should go in libhif, but the immediate plan is to
iterate here, then push downwards later.
Besides porting GFile -> fd, I specifically want it to operate in an
append mode for package layering. Then given an existing tree, we
ensure we're not deleting the underlying tree's autovar files.
compose-server.md: Removed redundant treefile section
treefile.md: Edited to indicate that `bootstrap_packages` is no longer
mandatory and is effectively deprecated
Encountered a couple crash scenarios:
1) A commit with an invalid timestamp trips an assertion. Instead
show the timestamp as "invalid".
2) If a deployed commit is unsigned, the daemon will not include a
"signatures" array in the deployment's GVariant representation.
The logic for --pretty was assuming the "signatures" array is
always present.
Determines a revision argument to either be a SHA256 checksum or a version
metadata value.
The revision string may have a "revision=" prefix to denote a SHA256
checksum, or a "version=" prefix to denote a version metadata value. If
the revision string lacks either prefix, the function attempts to infer
the type of revision. The prefixes are case-insensitive.
rpm-ostree upgrade --preview - Just preview package differences,
like deploy --preview
rpm-ostree upgrade --check - Just check if an upgrade is available
In both cases, the exit codes are 0 (upgrade available), 77 (no upgrade
available) and 1 (error).
The --check-diff option still works but is deprecated and not shown in
the --help option listing.
Don't remember why we're not using the daemon for this, but I already
went to the trouble of writing rpmostree_print_package_diffs() for the
"deploy" command. Use it here as well.
rpmostreed_commit_generate_cached_details_variant() returns NULL if the
origin checksum of an OstreeDeployment matches the checksum of a refspec,
which may also be the OstreeDeployment's origin.
I don't understand the reasoning for that, especially since none of the
callers are prepared to deal with a NULL return. Nor is there a comment,
so remove the check.
This was making the daemon crash on
rpm-ostree deploy --preview <current-deployment-checksum>
which should just indicate no package differences.
Deploy method locks the deployment at a particular commit by adding an
"override-commit" line to the origin file.
Upgrade method must undo the override so we always upgrade to the latest
available commit.
Deploy(revision) pulls and deploys a particular revision on the
branch of the currently booted deployment. The revision can be
expressed as a SHA256 checksum or as a version metadata value.
Similar to rpmostreed_repo_lookup_version(), except without pulling from
a remote repository. It traverses whatever commits are available in the
local repository.
rpmostreed_repo_pull_ancestry() downloads an ancestry of commit objects
starting from a given refspec. An optional visitor function is called
for each commit object. The visitor function can stop the recursion,
such as when looking for a particular commit.
rpmostreed_repo_lookup_version() builds on this by supplying a visitor
function that examines commit metadata for a particular version value.
When the version value is found, the commit's checksum is returned to
the caller.
