Instead of having two types, we simply have one, called `Entry`, which
we rename from `Change`.
There was no real benefit to having two almost identical types, but lots
of added complexity. This patch simplifies the crate by removing one of
the types.
This change allows for files (blobs) to be embedded into COB entries.
This allows for things like image attachments in issue comments for example.
For now, we only enable this in the `issue` COB.
The way it works is that relevant COB actions carry metadata about which
files are attached to them; and we store those files as blobs inside the
COB entry's *tree* object, under an `embeds/` folder.
The `Embed<T>` type is used for the above, and either carries actual
content, or carries a content-id. Retrieving the actual content is as
simple as asking the repository for a blob with that content-id.
As a possible future extension, MIME types could be stored alongside the
files in a "metadata" file. This could help clients display the content
appropriately.
> I'm going to be making a set of breaking changes to COBs in order to
stabilize the data formats. This is hopefully a one-time change that
bundles various breaking changes.
All COBs have been reworked: issue, patch, id.
The changes included are:
* Revise the assign and tag actions to take a single list of
assignees/tags to set, instead of an "add" and a "remove" list. This
makes API usage simpler when editing issues, and simplifies the apply
function
* Rename "tags" to "labels", and the tag action to label. This is
because tag is confusing in the context of git, as it could mean a git
tag. Using label removes that confusion.
* Use DIDs instead of PublicKeys for assignees -- this is more
future-proof
* Modify the manifest file format in the COB tree. Mainly, remove the
`history_type` key which is redundant, and use camelCase for keys
* Flatten the `Thread` actions into the parent action type
* Ensure that operations on redacted objects do not fail, since
redactions could have happened concurrently
* Use a consistent naming scheme for actions, using `.` as separator
* Consolidate comment types and remove `CodeComment`, by adding an
optional `location` field to `Comment`
* Add many placeholder actions that are not yet implemented
To preserve backwards compatibility, a `legacy` module is created with
the old `apply` function. When loading the manifest, we check whether it
is a legacy COB or a "stable" COB, and in the legacy case, use the
legacy code to materialize the state and then convert the object into
the stable type. Eventually, we'll delete the legacy code.
We test to make sure that in the event of concurrent operations,
traversal order is deterministic.
This required some changes to the testing infrastructure. We're also
able to simplify the `Actor` type that now has redundant functionality.
This commit addresses the issue of recursion in the TryFrom
call of Reference by resolving the parent in a lazy way.
Due to constraints posed by the need to access `git2::Repository`
or `git2::Commit` to resolve the parent, this commit decides to
pull out the parent resolution logic from the `cob::object::Commit`
module and move it inside the `cob::store::Store` implementation by adding
a new method `parents_of`.
Suggested-by: Fintan Halpenny <fintan.halpenny@gmail.com>
Tested-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
This change updates to the latest radicle-git-ext, which required a
few changes within the radicle family of crates.
One set of changes is that the radicle-git-ext crate subsumes
git-commit, git-trailers, and git-ref-format -- so all those imports
go through radicle-git-ext.
The commit code requires that parent `Oid`s point to commits, which
made some tests fail. One of the reasons for these failures is that
the patch tests used fabricated `Oid`s and so the verification would
fail. This is fixed by allowing the test context code to create
`PatchRequest`s that create valid commits.
The other reason for failure was that the identity `Action` passed an
`Oid` that pointed to a blob. This is fixed by removing that code and
making a note of it in documentation.
The final major change was moving the Refspec type into git-ref-format
and removing the AsRefspecs trait. The trait was not required and
could its usage could be replaced by simpler code.
Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett
This allows change commits to have more than one parent that isn't
part of the DAG.
We can use this to create dependencies towards git objects such as
commits, in the case of patch actions.
By introducing a small limitation: only allowing entries in the change
graph to be addressable, instead of individual operations; we
drastically simplify the CRDT implementation.
There are four advantages:
1. Op ids are just regular SHA-1s
2. There's no need for relative IDs, ops never refer to other ops within the
same commit
3. There's no need for a nonce, since commits can't collide, and neither can op IDs
4. `OpId` can just be an alias of `EntryId`
The disadvantage of course, is that we have to be mindful of how we
create op transactions, since each transaction creates an addressable
unit. For example, we must not include multiple patch revisions in the
same transaction.
It's fairly easy for a user to (by mistake or intentionally) create two
operations with the same OpId. This patch makes it much less likely,
and ensures that if the OpId is equal, it's because the operations
are identical.
We were getting warnings in release mode, since the
debug code is not being run, and some vars are mutable
instead of immutable.
Signed-off-by: Alexis Sellier <alexis@radicle.xyz>
* Move storage impl into `storage::cob`
* Rename `change::Create` to `change::Template`
* Rename `change::Storage::create` to `change::Storage::store`
Some of the renames are to further distinguish COBs from Changes, and
the different types of "create" operations within cobs.
Signed-off-by: Alexis Sellier <alexis@radicle.xyz>
Panic to clear to the operator something is wrong. Panic'ing like this
is ok in debug mode, but must be avoided in production.
Signed-off-by: Slack Coder <slackcoder@server.ky>
Collaborative object IDs are derived from their commit oid. These
IDs must be reproducible to support testing the client's example. All but
one of the parameters used to derive the Object ID is the commit's Author
and committer timestamp.
Introduce an environment variable 'RAD_COMMIT_TIME' to set both Author and
Committer timestamp when creating a commit in the cob module.
Use single variable, instead of Git's two (for author and committer), to
keep the changes simple. The function being modified returns a single
timestamp which is derived from the author's.
Signed-off-by: Slack Coder <slackcoder@server.ky>
Sometimes it is more efficient to perform multiple operations at once
and store those in the collaborative object graph together.
Change the contents to be a non-empty sequence of byte sequences,
i.e. NonEmpty<Vec<u8>>. These are stored as blobs in a git tree in
order by their index in the non-empty sequence. They are, in turn,
retrieved in order of their original index.
Change the conversion of an `EntryWithClock` to return a non-empty
sequence of `Op`s, which are in turn used to apply many changes in
each `from_history` implementation.
Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett
This is a minimal port of the collaborative objects code from
radicle-link[0].
A `CollaborativeObject` is made up of a `History` of `Change`s that
are expected to be stored in a `git` backend.
The library exposes a CRU series of functions `create`, `get`, `list`,
and `update`.
This implementation differs, to previous one, in that it does not
assume any kind of identity system -- its only assumption is that
identities have an identifier and can be addressed in the `git`
database. This means that it does not require an `author` to be passed
in and it only uses the `resource` (previously `authorizing_identity`)
to store its content-address in the `Change`.
It also foregoes any caching to simplify the port and not make any
early optimisation assumptions.
[0]: https://github.com/radicle-dev/radicle-link/tree/master/cob
Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
cloudhead
Alexis Sellier
Vincenzo Palazzo
Fintan Halpenny
Alexis Sellier
Slack Coder
