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This is a one-time tree wide reformatting to ensure consistency
going forward.
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When pulling with depth, missing parent commits are ignored. However,
the check was applying to any commit, which means that it would succeed
even if the requested commit was missing. This might happen on a
corrupted remote repo or when using ref data from a stale summary.
To achieve this, the semantics of the `commit_to_depth` hash table is
changed slightly to only ever includes parent commits. This makes it
easy to detect when a parent commit is being referenced (although there
is a minor bug there when multiple refs are being pulled) while keeping
references to commits that need their `commitpartial` files cleaned up.
It also means that the table is only populated on depth pulls, which
saves some memory and processing in the common depth=0 case.
Fixes: #2265
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In some cases such as backups or mirroring you may want to pull commits
from one repo to another even if there commits that have incorrect
bindings. Fixing the commits in the source repository to have correct
bindings may not be feasible, so provide a pull option to disable
verification.
For Endless we have several repositories that predate collection IDs and
ref bindings. Later these repositories gained collection IDs to support
the features they provide and ref bindings as the ostree tooling was
upgraded. These repositories contain released commits that were valid to
the clients they were targeting at the time. Correcting the bindings is
not really an option as it would mean invalidating the repository
history.
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If we have a commit id for all the refs we're pulling, and if we
don't need the summary to list all the refs when mirroring then the
only reason to download the summary is for the list of deltas.
With the new "indexed-deltas" property in the config file (and mirrored
to the summary file) we can detect when we don't need the summary for
deltas and completely avoid downloading it then.
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If there is no delta index in the summary, try to fetch the
delta index for the commit we're going to and use that to find the
delta (if any).
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As `summary` and `summary.sig` aren’t immutable, HTTP requests to
download them can be optimised by sending the `If-None-Match` and
`If-Modified-Since` headers to avoid unnecessarily re-downloading them
if they haven’t changed since last being checked.
Hook them up to the new support for that in the fetcher.
The `ETag` and `Last-Modified` for each file in the cache are stored as
the `user.etag` xattr and the mtime, respectively. For flatpak, for
example, this affects the cached files in
`~/.local/share/flatpak/repo/tmp/cache/summaries`.
If xattrs aren’t supported, or if the server doesn’t support the caching
headers, the pull behaviour is unchanged from before.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
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This is the dual of https://github.com/ostreedev/ostree/pull/2129/commits/1f3c8c5b3de978f6e069c24938967f823cce7ee8
where we output more detail when signapi fails to validate.
Extend the API to return a string for success, which we output
to stdout.
This will help the test suite *and* end users validate that the expected
thing is happening.
In order to make this cleaner, split the "verified commit" set
in the pull code into GPG and signapi verified sets, and have
the signapi verified set contain the verification string.
We're not doing anything with the verification string in the
pull code *yet* but I plan to add something like
`ostree pull --verbose` which would finally print this.
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The goal here is to move the code towards a model
where the *client* can explicitly specify which signature types
are acceptable.
We retain support for `sign-verify=true` for backwards compatibility.
But in that configuration, a missing public key is just "no signatures found".
With `sign-verify=ed25519` and no key configured, we can
explicitly say `No keys found for required signapi type ed25519`
which is much, much clearer.
Implementation side, rather than maintaining `gboolean sign_verify` *and*
`GPtrArray sign_verifiers`, just have the array. If it's `NULL` that means
not to verify.
Note that currently, an explicit list is an OR of signatures, not AND.
In practice...I think most people are going to be using a single entry
anyways.
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The way `timestamp-check` works might be too restrictive in some
situations. Essentially, we need to support the case where users want to
pull an older commit than the current tip, but while still guaranteeing
that it is newer than some even older commit.
This will be used in Fedora CoreOS. For more information see:
https://github.com/coreos/rpm-ostree/pull/2094
https://github.com/coreos/fedora-coreos-tracker/issues/481
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Previously in the pull code, every time we went to verify
a commit we would re-initialize an `OstreeSign` instance
of each time, re-parse the remote configuration
and re-load its public keys etc.
In most cases this doesn't matter really because we're
pulling one commit, but if e.g. pulling a commit with
history would get a bit silly.
This changes things so that the pull code initializes the
verifiers once, and reuses them thereafter.
This is continuing towards changing the code to support
explicitly configured verifiers, xref
https://github.com/ostreedev/ostree/issues/2080
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`ostree-repo-pull.c` is huge; separate some of the GPG/signing
verification functions into their own file so they're more easily seen.
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Prep for further splitting up `ostree-repo-pull.c`.
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`ostree-repo-pull.c` is rather monstrous; I plan to split it
up a bit. There's actually already a `pull-private.h` but
that's just for the binding verification API. I think that one
isn't really pull specific. Let's move it into the "catchall"
`repo.c`.
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SPDX License List is a list of (common) open source
licenses that can be referred to by a “short identifier”.
It has several advantages compared to the common "license header texts"
usually found in source files.
Some of the advantages:
* It is precise; there is no ambiguity due to variations in license header
text
* It is language neutral
* It is easy to machine process
* It is concise
* It is simple and can be used without much cost in interpreted
environments like java Script, etc.
* An SPDX license identifier is immutable.
* It provides simple guidance for developers who want to make sure the
license for their code is respected
See http://spdx.org for further reading.
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Closes: #1439
Approved by: cgwalters
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It will be used by the fsck utility in future. We could expose it
publicly in future too, if needed.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Closes: #1347
Approved by: cgwalters
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