These are useful for ostree users (like xdg-app) that have custom
options for remotes. In particular they are useful when we later make them
all respect self->parent_repo.
Closes: #236
Approved by: cgwalters
Force the otherwise disabled gpg verifications on.
Note: You need to pass --remote=foo so we know what gpg keys to verify
against.
Closes: #237
Approved by: cgwalters
Not only does this not make sense from a performance perspective, but
it also doesn't work because we can't use a url as a path element.
Closes: #237
Approved by: cgwalters
ostree-grub-generator can be used to customize
the generated grub.cfg file. Compile time
decision ostree-grub-generator vs grub2-mkconfig
can be overwritten with the OSTREE_GRUB2_EXEC
envvar - useful for auto tests and OS installers.
Why this alternative approach:
1) The current approach is less flexible than using a
custom 'ostree-grub-generator' script. Each system can
adjust this script for its needs, instead of using the
hardcoded values from ostree-bootloader-grub2.c.
2) Too much overhead on embedded to generate grub.cfg
via /etc/grub.d/ configuration files. It is still
possible to do so, even with this patch applied.
No need to install grub2 package on a target device.
3) The grub2-mkconfig code path has other issues:
https://bugzilla.gnome.org/show_bug.cgi?id=761180
Task: https://bugzilla.gnome.org/show_bug.cgi?id=762220Closes: #228
Approved by: cgwalters
This is a follow up to #227 to allow ostree to open the editor also for
orphan commits when no subject or body is given on the cmdline.
Closes: #229
Approved by: cgwalters
The API supports this, and it's not hard for us to do in the command
line as well. One possible use case is separating "content
generation" in a separate server.
Related: https://github.com/ostreedev/ostree/pull/223Closes: #227
Approved by: jlebon
When I'm doing local development builds, it's quite common for me not
to want to accumulate history. There are also use cases for this on
build servers as well.
In particular, using this, one could write a build system that didn't
necessarily need to have access to (a copy of) the OSTree repository.
Instead, the build system would determine the last commit ID on the
branch, and pass that to a worker node, then sync the generated
content back.
The API supported generating custom commits that don't necessarily
reference the previous commit on the same branch, let's just expose
this in the command line for convenience.
I plan to also support this rpm-ostree.
Closes: #223
Approved by: jlebon
Now that OSTree is used as G_LOG_DOMAIN, set the main handler to match
so the appropriate messages are filtered. It would probably be more
appropriate to spell out "OSTree" in the code, but since G_LOG_DOMAIN is
being defined globally in the project, might as well reuse it here.
https://bugzilla.gnome.org/show_bug.cgi?id=764237Closes: #225
Approved by: cgwalters
If you have a repo where a needed object has been inadvertantly removed,
all you'll get is a "No such metadata object" error with no clue about
where it was referenced from.
Add some debug messages to provide clues about which objects are being
traversed and found.
https://bugzilla.gnome.org/show_bug.cgi?id=764006Closes: #224
Approved by: cgwalters
When prune fails, it can be really difficult to figure out why. This at
least lets you know which objects are being considered.
https://bugzilla.gnome.org/show_bug.cgi?id=764006Closes: #224
Approved by: cgwalters
This can be used as a fingerprint to determine whether two
OstreeSePolicy objects are equivalent.
Also add documentation for ostree_sepolicy_get_name().
Closes: #219
Approved by: cgwalters
The dirtree object is required for traversing, so don't use the
load_variant_if_exists() function. This will return a
G_IO_ERROR_NOT_FOUND to the caller rather than trying to ref a NULL
variant in ostree_repo_commit_traverse_iter_init_dirtree() if the object
is missing.
https://bugzilla.gnome.org/show_bug.cgi?id=764091
If a commit only pull has been done, then the commit object exists in
the object store in addition to the commitpartial file. Traversing this
partial commit will likely fail, but that's expected. If traverse
returns a G_IO_ERROR_NOT_FOUND in this case, continue with pruning.
https://bugzilla.gnome.org/show_bug.cgi?id=764091
I'm trying to improve the developer experience on OSTree-managed
systems, and I had an epiphany the other day - there's no reason we
have to be absolutely against mutating the current rootfs live. The
key should be making it easy to rollback/reset to a known good state.
I see this command as useful for two related but distinct workflows:
- `ostree admin unlock` will assume you're doing "development". The
semantics hare are that we mount an overlayfs on `/usr`, but the
overlay data is in `/var/tmp`, and is thus discarded on reboot.
- `ostree admin unlock --hotfix` first clones your current deployment,
then creates an overlayfs over `/usr` persistent
to this deployment. Persistent in that now the initramfs switchroot
tool knows how to mount it as well. In this model, if you want
to discard the hotfix, at the moment you roll back/reboot into
the clone.
Note originally, I tried using `rofiles-fuse` over `/usr` for this,
but then everything immediately explodes because the default (at least
CentOS 7) SELinux policy denies tons of things (including `sshd_t`
access to `fusefs_t`). Sigh.
So the switch to `overlayfs` came after experimentation. It still
seems to have some issues...specifically `unix_chkpwd` is broken,
possibly because it's setuid? Basically I can't ssh in anymore.
But I *can* `rpm -Uvh strace.rpm` which is handy.
NOTE: I haven't tested the hotfix path fully yet, specifically
the initramfs bits.
In some cases (such as `ostree-sysroot-cleanup.c`), the surrounding
code would be substantially cleaner if it was also ported to
fd-relative, but I'm going to do that in a separate patch.
That way these patches are easier to review for mechanical
correctness. I used an Emacs keyboard macro as the poor man's
[Coccinelle](http://coccinelle.lip6.fr/).
⚠️ There is a notable spiked pit trap here around
`posix_fallocate()` and `errno`. This has bit other projects,
see e.g.
7bb87460e6
Otherwise the port was straightforward.
Since we hard-depend on GLib 2.40, we can start using GSubprocess.
This is part of dropping our dependency on libgsystem, which is
deprecated in favor of libglnx (as well as migrating things to GLib).
I'd like to encourage people to make OSTree-managed systems more
strictly read-only in multiple places. Ideally everywhere is
read-only normally besides `/var/`, `/tmp/`, and `/run`.
`/boot` is a good example of something to make readonly. Particularly
now that there's work on the `admin unlock` verb, we need to protect
the system better against things like `rpm -Uvh kernel.rpm` because
the RPM-packaged kernel won't understand how to do OSTree right.
In order to make this work of course, we *do* need to remount `/boot`
as writable when we're doing an upgrade that changes the kernel
configuration. So the strategy is to detect whether it's read-only,
and if so, temporarily mount read-write, then remount read-only when
the upgrade is done.
We can generalize this in the future to also do `/etc` (and possibly
`/sysroot/ostree/` although that gets tricky).
One detail: In order to detect "is this path a mountpoint" is
nontrivial - I looked at copying the systemd code, but the right place
is to use `libmount` anyways.
It used to be allowed to run something like "ostree remote refs" on
a read-only (e.g. system) repo. However, the summary cache caused that to
break. This commit just makes it not save the cache if we get some kind
of permission error when writing it. It'll still work, even without the
cache.
https://bugzilla.gnome.org/show_bug.cgi?id=763855
It allows an optimization to skip the download of the summary file
if its .sig file is unchanged.
Downloading the .sig file is much cheaper than downloading the summary
file from repositories with many branches.
https://bugzilla.gnome.org/show_bug.cgi?id=762973
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
This will allow daemons like rpm-ostree to detect if there are any new
deployments efficiently, in combination with using inotify. If there
are any changes, rpm-ostree wants publish them on DBus.
While we're here, add some changes to start doing unit C testing of
the sysroot API.
And change the command line to use it. rpm-ostree had a copy
of this code, and thus there's a clear reason to have an API.
While we're moving this into API, ensure the mtime on deploy is bumped
after an osname is created, so that daemons like rpm-ostree can notice
changes. (In reality, creating the directory should do this, but
let's be double sure)
This allows other processes (e.g. rpm-ostreed) to monitor for external
changes (e.g. if someone does `ostree admin undeploy`) in a relatively
sane fashion.
Specifically, I'm trying to fix:
https://github.com/projectatomic/rpm-ostree/issues/220
It accepts a `flags` argument to control its behavior. Differently
from `ostree_repo_list_refs`, the `refspec_prefix` is not removed from
the results.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
I plan to use this in rpm-ostree at least for two reasons:
- To find the mtime on the repo
- To use the tmp/ directory to stage content (but we should eventually
add a better API)
As rpm-ostree evolves, it keeps driving API additions to libostree.
This creates a relatively tight coupling.
However, if delivering via e.g. RPM, unless one manually remembers to
increment the `Requires:` in the spec file, it's possible for the two
to become desynchronized.
RPM handles versioned symbols and will ensure a dependency if the
application starts using a newer version.
To implement this, switch to `-fvisibility=hidden`, along with an
annotation in the header, and finally add a `.sym` file.
This matches what other projects like systemd and libvirt do.
Although rather than attempting to retroactively version symbols, glom
them all onto the current one.
I see when analyzing a delta here that due to byteswapping a negative
compression ratio of 540%, 66%, and 28%. Let's arbitrarily pick 20%
as a threshold for detecting byetswapping.
If the average object size is greater than 4GiB, let's assume we're
dealing with opposite endianness. I'm fairly confident no one is
going to be shipping peta- or exa- byte size ostree deltas, period.
Past the gigabyte scale you really want bittorrent or something.
xdg-app passed this a filename directly, and in this case it should be
used as is. This regressed to always look for "superblock" in the same
directory as the passed in filename.
https://bugzilla.gnome.org/show_bug.cgi?id=762617
Some Docker layers are just metadata in the `layer.json`. If one is
mapping Docker layers to OSTree commits, one needs to create a dummy
root directory, because OSTree doesn't support metadata-only commits.
Let's just push that logic down here because it's easier than special
casing it in higher levels.
One of the design goals with deltas was not just wire efficiency,
but also having all the data up front about how much data would
be transferred before starting.
Let's expose that better by adding a `dry-run` option to the pull API.
This requires static deltas to be useful. Basically we simply call
the progress callback once with the data from the superblock.
For a production release repository, most OS vendors would want
to just always use static deltas. Add the ability for the pulls to
require it.
(I think I'll also add a summary key for this actually in addition,
so the repo manager can force it too)
If ostree is run in a test setup where it operates as root in a tmp
directory, it might cause issues to flag the deployments as immutable.
The test harness might simply be doing an `rm -rf` (effectively the case
for gnome-desktop-testing-runner), which will then fail.
We add a new debug option to the ostree_sysroot object using GLib's
GDebugKey functionality to allow our tests to communicate to ostree that
we don't want immutable deployments.
This is a more flexible version of the previous
ostree_repo_write_archive_to_mtree() which took a file reference.
This has an extensible options structure, and in particular
now supports `ignore_unsupported_content`.
I plan to use this for importing Docker images which contain device
nodes. (There's no reason for container images to have those, so
we'll just ignore them).
Also here, just like the export variant, the caller is responsible for
setting up libarchive.
I was going to add new API for importing, and it was really confusing
that what I think of now as import and export both had "write" in the
name. It's just clearer to talk about the direction.
At the same time, include `Export` in the options structure.
This isn't an ABI break as the API isn't in a release.
I was getting a compilation error with the GCC hardening flags which
look for a missing mode with `O_CREAT`. The right fix here is to drop
`O_CREAT`, as truncate() should throw `ENOENT` if the file doesn't
exist.
I don't know why we didn't do this a long time ago. This extends the
pull API to allow grabbing a specific commit, and will set the branch
to it. There's some support for this in the deploy engine, but there
are a lot of reasons to support it for raw pulls (such as subset
mirroring cases).
In fact I'm thinking we should also have the override-version logic
here too.
NOTE: One thing I debated here is inventing a new syntax on the
command line. Git doesn't seem to have this functionality (probably
because it'd be rarely used). The '@' character at least doesn't
conflict with anything.
Anyways, I wanted this for some other test cases. Without this,
writing tests that go between different commits is more awkward as one
must generate the content in one repo, then pull downstream, then
generate more content, then pull again. But now I can just keep track
of commit IDs and do exactly what I want without synchronizing the
tests.
At the moment I'm looking at using rpm-ostree to manage RPM inputs
which can then be converted into Docker images. It's most convenient
if we can stream directly out of libostree rather than doing a
checkout + tar combination.
There are also backup/debugging etc. reasons to implement `export` as
well.
While it's not strictly tied to OSTree, let's move
https://github.com/cgwalters/rofiles-fuse in here because:
- It's *very* useful in concert with OSTree
- It's tiny
- We can reuse OSTree's test, documentation, etc. infrastructure
One thing to consider also is that at some point we could experiment
with writing a FUSE filesystem for OSTree. This could internalize a
better equivalent of `--link-checkout-speedup`, but on the other hand,
the cost of walking filesystem trees for these types of operations is
really quite small.
But if we did decide to do more FUSE things in OSTree, this is a step
towards that too.
Now we display stats on the individual parts, such as the blob size
and the number of each type of opcode. Most interesting to me is
things like how many bsdiff opcodes there are vs new objects, etc.
We had code to deal with opening/checksumming/decompressing static
deltas in a few places. I'd like to teach `ostree static-delta show`
how to display more information, and this will allow it to just use
`_ostree_static_delta_part_open()` too.
Right now though, almost all of the details of deltas are private, so
we can't do the "honest thing" and have the command line just use the
shared library.
Eventually some of this should appear in the API, but for now add
command line which is useful for debugging.
I'd like to incrementally convert all of `ostree-repo*.c` to
fd-relative usage, so that we can sanely introduce
`ostree_repo_new_at()` which doesn't involve GFile.
This one is medium risk, but passes the test suite.
The original intention here was that we'd keey around a copy of the
file so that grub2 could eventually learn how to do atomic updates by
checking for a "fully written" marker in the *new* file, and if it
didn't exist, falling back to grub2.cfg.old.
I haven't yet proposed that upstream, but we might as well stop
deleting the file since it's useful as a backup at least.
Reported-by: Gatis Paeglis
This is a better followup to dc9239dd7b
since I wanted to do fsync-less checkouts in rpm-ostree too, and
replicating the "turn off fsync temporarily" was in retrospect just a
hack.
We can simply add a boolean to the checkout options.
https://github.com/GNOME/ostree/pull/172
Originally, a lot of the `fsync()` calls here were added for the
wrong reason - I was chasing a bug that ended up being the extlinux
bootloader not parsing 64 bit ext4 filesystems. But since it looked
like corruption, I tried adding a lot more `fsync()` calls.
All we should have to do is use `syncfs()`. If that doesn't work,
it's a kernel bug.
I'm making this change because skipping the individual fsyncs can be a
major performance win - it's easier for the FS to optimize, we do more
in parallel, etc.
https://bugzilla.gnome.org/show_bug.cgi?id=757117
A fast way to generate new OSTree content using an existing
tree is to checkout (as hard links), add/replace files, then
call `ostree_repo_scan_hardlinks()`, then commit.
But `ostree_repo_scan_hardlinks()` scans the entire repo, which
can be slow if you have a lot of content.
All we really need is a mapping of (device,inode) -> checksum
just for the objects we checked out, then use that mapping
for commits.
This patch adds API so that callers can create a mapping via
`ostree_repo_devino_cache_new()`, then pass it to
`ostree_repo_checkout_tree_at()` which will populate it, and then
`ostree_repo_write_directory_to_mtree()` can consume it.
I plan to use this in rpm-ostree for package layering work.
Notes:
- The old `ostree_repo_scan_hardlinks()` API still works.
- I tweaked the cache to be a set with the checksum colocated with
the key, to avoid a separate malloc block per entry.
https://github.com/GNOME/ostree/pull/167
The logic for checking which bootversion to use tries to access
sysroot->bootversion if the user didn't specify an explicit bootversion
on the command-line nor through the env var. However, at that point, the
sysroot object is not yet initialized, so it will always return 0, even
when it's 1.
This would cause e.g. `grub2-mkconfig` to have no output for the BLS
entries whenever the entries were under `/boot/loader.1`.
Related: RHBZ1293986
The tmp directory is lazily created for each fetcher instance, since
it may require superuser permissions and some instances only need
_ostree_fetcher_request_uri_to_membuf() which keeps everything in
memory buffers.
This is a continuation of earlier work to drop the individual fsync on
files/directories in favor of relying on `syncfs()` for speed.
As part of that cleanup, I'm porting it to be fd-relative.
I feel relatively confident about this change given that this area of
the code has notable test suite coverage, although that code runs as
non-root.
I'm porting the deployment code to be fd-relative, but part of the
logic was using `GFile` to talk to `OstreeRepoFile` to determine the
"bootcsum" (boot config checksum) before checking out the file tree.
We can avoid having both code paths by checking out the tree first,
then looking at it on the filesystem.
Extract existing code from ostree_repo_prune and add an argument COMMIT,
that controls which commit purge. If not set, the old behavior is kept.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Downloads and prints a remote summary file and any signatures in an
easy-to-read format, or alternatively with the --raw option, prints
the summary GVariant data directly.
https://bugzilla.gnome.org/show_bug.cgi?id=759250
Given the previous commit, which isolates SoupSession in a separate
thread, it should be safe to start pushing a temporary main context
for synchronous requests again.
This partially reverts 84fe2ff, which partially reverted 9f3d586.
Related to https://bugzilla.gnome.org/show_bug.cgi?id=753336
Move the SoupSession to a separate thread with its own isolated main
context and main loop. All interaction with the SoupSession occurs
by way of idle sources attached to the session's main context, which
execute on the session's thread.
This should solve the problem of running an asynchronous fetch request
synchronously by pushing a new thread-default main context and iterating
a main loop until the request completes. Prior to this, the new thread-
default main context would interfere with the SoupSession's own async
processing.
A lot of effort here just to avoid touching SoupSession directly in
ostree_fetcher_new(). The reason will become apparent in subsequent
commits.
Note this introduces generated enum/flags GTypes using glib-mkenums.
I could have just made the property type as plain integer, but doing
properties right will henceforth be easier now that the automake-fu
is established.
This way two pulls will not use the same tmpdir and accidentally
overwrite each other. However, consecutive OstreeFetchers will reuse
the tmpdirs, so that we can properly resume downloading large objects.
https://bugzilla.gnome.org/show_bug.cgi?id=757611
Concurrent pulls break since we're sharing the staging directory for
all transactions in the repo. This makes us use a per-transaction directory.
However, in order for resumes to work we first look for existing
staging directories and try to aquire an exclusive lock for them. If
we can't find any staging directory or they are all already locked,
then we create a new one.
https://bugzilla.gnome.org/show_bug.cgi?id=757611
This creates a subdirectory of the tmp dir with a selected prefix,
and takes a lockfile to ensure that nobody else is using the same directory.
However, if a directory with the same prefix already exists and is
not locked that is used instead.
The later is useful if you want to support some kind of resumed operation
on the tmpdir.
touch reused dirs
https://bugzilla.gnome.org/show_bug.cgi?id=757611
Bison is a well known external dependency, so just require it.
Including the generated content in git means it may or may not
be regenerated based randomly on timestamps, etc.
Also use `$(AM_V_GEN)` so we get prettier output.
Previously we were just ignoring this, which hid a bug in
an earlier commit that generated them.
Also change the `commit` program to use both APIs - this
involves extra code, but not too much.
This way, reverting the fix with this on top caused the test suite to
fail. Adding an active test for this would need a custom test program
using the C API, or adding a cmdline flag to the client, neither of
which quite seemed worth it.
Use the parse-datetime module from gnulib, and adapt it to not require
other modules as portability is not really an issue for us.
DATE can be specified in different formats, such as: "-1 week", "last
monday", "1 week ago".
Include the generated .c file in the repository so to not add another
dependency to Bison.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
ostree_repo_write_commit_with_time() converts the timestamp to
big-endian byte order.
ostree_repo_write_commit() was also doing this when calling
ostree_repo_write_commit_with_time(), resulting in a corrupted
commit object (timestamp bytes were backwards).
Recent regression in 14ffd7022a
Just to make copy-and-paste a little easier, as I often use this command
immediately before rebasing.
e.g.
# ostree remote refs fedora-atomic
fedora-atomic:fedora-atomic/f23/x86_64/docker-host
fedora-atomic:fedora-atomic/f23/x86_64/testing/docker-host
^^^^^^^^^^^^^^ (this part is new)
# rpm-ostree rebase fedora-atomic:fedora-atomic/f23/x86_64/testing/docker-host
Do not delete a .commitmeta file after removing the last metadata entry.
This way a client will pull the empty .commitmeta file and overwrite old
metadata as expected.
https://bugzilla.gnome.org/750459
ostree_checksum_bytes_peek() can return NULL if the checksum has an
incorrect length (most likely from disk corruption) but most callers
are not prepared to handle this and would likely crash.
Use ostree_checksum_bytes_peek_validate() instead, which sets a
GError on an invalid checksum.
It may have a different meaning, and the usage screen is not helpful.
Print the usage screen only when the command is not found.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
This is very useful for the inline-parts case, as you can then include
detached signatures in a single file representing the commit.
It is not as important for the generic pull case, as the detached
metadata is only a single small file. Additionally the detached
metadata is not content referenced and may change after the static
delta file was created, so we need to pull the latest version anyway.
If you pass a diriectory it will look for the "superblock" child, otherwise
it will use the file as the superblock. I need this in xdg-app to be able
to install any filename as a bundle.
Also renames OstreeRepoTrustedContentBareCommit to
OstreeRepoContentBareCommit so that it can be used by both.
This will be needed when we introduce checksum verification of objects
in static deltas.
In this mode the parts are stored in the metadata of the main delta
superblock file. This can be useful if you want a single-file delta
for easy transport, or for http in the case the delta is very small.
When a commit is deleted and the repo is configured to use tombstone
commits, create one. Delete the tombstone file only if the commit is
pulled again.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Add a new object type: OSTREE_OBJECT_TYPE_TOMBSTONE_COMMIT that is
used when a commit was intentionally removed.
If the remote repository doesn't use tombstone commits, do not fail on
a missing commit (change 0b795785dd).
When the remote repository uses tombstones, if a commit cannot be
found, check if the tombstone file is present and fail if it is not
present.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
There might be a race here in that we create new symlink files *after*
calling `syncfs`, and they are not guaranteed to end up on disk.
Rework the code so that we create symlinks before, and then only
rename them after (and `fsync()` the directory for good measure).
Additional-fixes-by: Giuseppe Scrivano <gscrivan@redhat.com>
Tested-by: Giuseppe Scrivano <gscrivan@redhat.com>
This still needs verification that we're fixing a real bug; but I'm
fairly confident this won't make the fsync situation worse.
https://bugzilla.gnome.org/show_bug.cgi?id=755595
Adds an entry to the origin file to force the OstreeSysrootUpgrader to
pull and deploy the given checksum.
[origin]
override-commit=CHECKSUM
If the option is not given, any such entry is explicitly removed from
the origin file to ensure we upgrade to the latest available commit.
Upgrader now looks for an "override-commit" key in the origin file
with a commit checksum, which causes the upgrader to pull and deploy
the specified commit rather than the latest available commit on the
origin refspec.
The current code checks if /boot/uEnv.txt is a symlink to
decice if sysroot requires u-boot support. Why this is bad:
There are 2 ways to provide a custom env to u-boot from user space:
1) A compiled binary that is sourced from u-boot.
2) A text file (usually /uEnv.txt) that is imported into env from u-boot.
The current OSTree u-boot integration code was designed with the 1st
case in mind.
Many bootscripts provided by an embedded device vendors expect
to find uEnv.txt in the top level directory, it is often hardcoded
when building u-boot and is difficult to change later on. Or in other
cases it is stored in read-only memory so changing it would require
re-flushing boot loader with a new env. So the issue here is that
OSTree's and vendor uEnv.txt want to exist and the same path and OSTree
would throw away any changes added to /uEnv.txt by user on the next
upgrade/deploy.
This patch "hides" away the OSTree's env file loader/uEnv.txt from users
who are used to edditing uEnv.txt at the top level directory. Now to add
OSTree support on such boards you can simply add a custom logic in uEnv.txt
that loads ostree env from /loader/uEnv.txt
This change is backward compatible with the previous ostree releases and
solves the issue described in:
https://bugzilla.gnome.org/show_bug.cgi?id=755787
Using `commit_subject` instead of `arg` is clearer as it can refer to
a directory, archive or ref.
This is just an aesthetic change in the source code, having no impact
anywhere else.
There is already a check that the destination object does not
exist in all other cases when processing an incoming static delta.
However, the bspatch case would still try to run and fail. Add
an analogous check to that case as well.
https://bugzilla.gnome.org/show_bug.cgi?id=756260
Alexander Larsson
Giuseppe Scrivano
Gatis Paeglis
Jonathan Lebon
Colin Walters
Dan Nicholson
Stef Walter
Matthew Barnes
John Hiesey
Daniel Drake
Leandro Santiago