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Rename `struct odb_read_stream` to just `struct odb_stream`. This
prepares for unification of the two different types of streams, as these
provide the same functionality with the preceding refactorings.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The logic to write loose objects is split up across "object-file.c" and
"odb/source-loose.c". This split is somewhat weird, but it is the result
of two things:
- `force_object_loose()` used to reach into internals of how exactly
we write objects.
- The logic of writing objects is intertwined with potentially
starting a transaction.
We have refactored `force_object_loose()` over preceding commits to work
via generic interfaces now, so this reason doesn't exist anymore. But
the second reason still does, as our management of "files" transactions
and their ad-hoc creation is still very messy. This area definitely
requires further work, and that work is indeed ongoing.
That being said, we can already move the writing logic into the "loose"
backend rather easily. All we have to do is to expose two functions that
relate to the transactions.
Expose these two functions and move the writing logic into the "loose"
backend accordingly so that it becomes more self-contained. Note that
this requires us to drop a reference to `the_repository` in favor of
using the source's repository in `start_loose_object_common()`.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In the preceding commits we have refactored `force_object_loose()` to
not call internal functions anymore for writing the object. Instead, it
now only uses generic functions that are accessible to all callers.
Consequently, we can now easily move the function to its only caller,
which is git-pack-objects(1). Do so.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The function `force_object_loose()` is used to loosen packed objects
before repacking. It passes the pack's mtime along so that the newly
written loose object inherits the same timestamp. This matters for
object pruning, which uses the mtime to determine whether an object is
old enough to be pruned.
In a subsequent commit, `force_object_loose()` will be converted to use
the generic `odb_source_write_object()` interface instead of calling
`write_loose_object()` directly. But the generic interface doesn't yet
support setting a specific mtime, which makes it impossible to implement
the logic as of now.
Prepare for the change by introducing a new `mtime` parameter to this
function that we plumb through the stack. If set, the backends are
instructed to set the object's mtime accordingly. If unset, the backends
are expected to use the current time instead.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Same as in a preceding commit, compute the object hash in
`odb_write_object_ext()` so that we can unify this logic.
Besides unification, this change also allows us to lift the object
existence check out of the "loose" backend into the generic layer, which
will happen in the next commit.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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'git receive-pack' has been refactored to use ODB transaction
interfaces instead of directly managing 'tmp_objdir' for staging
incoming objects, bringing it closer to being ODB backend agnostic.
* jt/receive-pack-use-odb-transactions:
builtin/receive-pack: stage incoming objects via ODB transactions
builtin/receive-pack: drop redundant tmpdir env
odb/transaction: introduce ODB transaction flags
odb/transaction: add transaction env interface
odb/transaction: propagate commit errors
odb/transaction: propagate begin errors
object-file: propagate files transaction errors
object-file: drop check for inflight transactions
object-file: embed transaction flush logic in commit function
object-file: rename files transaction fsync function
object-file: rename files transaction prepare function
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The temporary directory used by git-receive-pack(1) to write objects is
managed slightly differently than how it is done via ODB transactions:
- The temporary directory is eagerly created upfront, instead of
waiting for the first object write.
- The prefix name of the temporary directory is "incoming" instead of
"bulk-fsync".
In a subsequent commit, git-receive-pack(1) will use ODB transactions
instead of `tmp_objdir` directly. To provide a means to configure the
same transaction behavior, introduce `enum odb_transaction_flags` and
the ODB_TRANSACTION_RECEIVE flag intended as a signal for ODB
transactions using the "files" backend to be set up for
git-receive-pack(1). Transaction call sites are updated accordingly to
provide the required flag parameter.
Signed-off-by: Justin Tobler <jltobler@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The "files" transaction backend may encounter errors related to managing
the temporary directory used to stage objects, but silently ignores
these errors. Instead return errors encountered in the
`odb_transaction_files_{prepare,begin,commit}()` interfaces to allow
callers to handle them as needed.
Signed-off-by: Justin Tobler <jltobler@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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ODB transactions are started via `odb_transaction_begin()` and contain
validation to avoid starting multiple transactions at the same time. The
"files" backend also has the same logic, but is redundant due to the
generic layer already handling it. Drop this validation from the "files"
backend accordingly.
Signed-off-by: Justin Tobler <jltobler@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Continue walking the code path for the >4GB `hash-object --literally`
test. The `hash_object_file_literally()` function internally uses both
`hash_object_file()` and `write_object_file_prepare()`. Both function
signatures use `unsigned long` rather than `size_t` for the mem buffer
sizes. Use `size_t` instead, for LLP64 compatibility.
While at it, convert those function's object's header buffer length to
`size_t` for consistency. The value is already upcast to `uintmax_t` for
print format compatibility.
Note: The hash-object test still does not pass. A subsequent commit
continues to walk the call tree's lower level hash functions to identify
further fixes.
Signed-off-by: Philip Oakley <philipoakley@iee.email>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Wire up the `write_object_stream()` callback.
Note that we don't move the implementation into "odb/source-loose.c".
This is because most of the logic to write loose objects is still
contained in "object-file.c", and detangling that requires us to do some
refactorings as explained in the preceding commit. So for now, the
implementation of writing an object stream is still located in
"object-file.c".
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The "object-file" subsystem still hosts the majority of logic used to
write loose objects. Eventually, we'll want to move this logic into
"odb/source-loose.c", but this isn't yet easily possible because a lot
of the writing logic is still being shared with `force_object_loose()`.
We will eventually detangle this logic so that we can indeed move all of
it into the "loose" source. Meanwhile though, refactor the code so that
it operates on a `struct odb_source_loose` directly to already make the
dependency explicit.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Move `odb_source_loose_write_object()` from "object-file.c" into
"odb/source-loose.c" and wire it up as the `write_object()` callback of
the loose source.
As in preceding commits, this requires us to expose a couple of generic
functions from "object-file.c" as they are used in both subsystems now.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Move `odb_source_loose_freshen_object()` from "object-file.c" into
"odb/source-loose.c" and wire it up as the `freshen_object()` callback
of the loose source.
As part of the move, `check_and_freshen_source()` is inlined into the
callback function, as it has no other callers anymore.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The function `odb_source_loose_has_object()` checks whether a specific
object exists as a loose object on disk by using lstat(3p). This
interface is somewhat redundant, as we typically check for object
existence in a generic way via `odb_source_read_object_info()`.
In fact, these two calls are redundant in case the latter is called in a
specific way: when called without an object info request and without the
`OBJECT_INFO_QUICK` flag, then we will end up doing the same call to
lstat(3p) in `read_object_info_from_path()`.
Drop the function and adapt callers to instead use the generic
interface so that its calling conventions align with that of other
sources.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Move `odb_source_loose_count_objects()` and its associated helpers from
"object-file.c" into "odb/source-loose.c" and wire it up as the
`count_objects()` callback of the loose source.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Move `odb_source_loose_find_abbrev_len()` and its associated helpers
from "object-file.c" into "odb/source-loose.c" and wire it up as the
`find_abbrev_len` callback of the loose source.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Move `odb_source_loose_for_each_object()` and its associated helpers
from "object-file.c" into "odb/source-loose.c" and wire it up as the
`for_each_object()` callback of the loose source.
Again, as in the preceding commit, we are forced to expose a couple of
functions from "object-file.c" that are now used by both subsystems.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Move `odb_source_loose_read_object_stream()` and its associated helpers
from "object-file.c" into "odb/source-loose.c" and wire it up as the
`read_object_stream()` callback of the loose source.
As part of the move we are also forced to expose a couple of functions
from "object-file.h" that parse object headers in a somewhat-generic
way, as those functions are now used by both subsystems.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Move `odb_source_loose_read_object_info()` from "object-file.c" into
"odb/source-loose.c" and wire it up as the `read_object_info()` callback
of the loose source. Callers that previously invoked it directly now go
through the generic `odb_source_read_object_info()` interface instead.
The function `read_object_info_from_path()` cannot be moved along with
it because it is still called by `for_each_object_wrapper_cb()`. It is
therefore kept in place, but adjusted to take a loose source to clarify
that it's always operating on this structure.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Move `odb_source_loose_reprepare()` from "object-file.c" into
"odb/source-loose.c" and wire it up as the `reprepare()` callback of the
loose source.
While at it, make `odb_source_loose_clear_cache()` static, as it is no
longer needed outside of its file.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Start converting `struct odb_source_loose` into a proper pluggable
`struct odb_source` by embedding the base struct and assigning it the
new `ODB_SOURCE_LOOSE` type. Furthermore, wire up lifecycle management
of this source by implementing the `free` callback and taking ownership
of the chdir notifications.
Note that the loose source is not yet functional as a standalone `struct
odb_source`, as it's missing all of the callback implementations. These
will be wired up in subsequent commits.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In subsequent patches we'll be turning `struct odb_source_loose` into a
proper `struct odb_source`. As a first step towards this goal, move its
struct out of "object-file.c" and into "odb/source-loose.c".
This detaches the implementation of the loose object source from the
generic object file code, following the same convention already used by
the "files" and "in-memory" sources.
No functional changes are intended.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We've got a couple of functions that accept `odb_write_object()` flags,
but all of them accept the flags as an `unsigned` integer. In fact, we
don't even have an `enum` for the flags field.
Introduce this `enum` and adapt functions accordingly according to our
coding style.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The function `repo_find_unique_abbrev_r()` takes as input an object ID
as well as a minimum object ID length and returns the minimum required
prefix to make the object ID unique.
The logic that computes the abbreviation length for loose objects is
deeply tied to the loose object storage format. As such, it would fail
in case a different object storage format was used.
Prepare for making this logic generic to the backend by moving the logic
into a new `odb_source_loose_find_abbrev_len()` function that is part of
"object-file.c".
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The logic to iterate through loose objects that have a certain prefix is
currently hosted in "object-name.c". This logic reaches into specifics
of the loose object source, so it breaks once a different backend is
used for the object storage.
Move the logic to iterate through loose objects with a prefix into
"object-file.c". This is done by extending the for-each-object options
to support an optional prefix that is then honored by the loose source.
Naturally, we'll also have this support in the packfile store. This is
done in the next commit.
Furthermore, there are no users of the loose cache outside of
"object-file.c" anymore. As such, convert `odb_source_loose_cache()` to
have file scope.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The `odb_for_each_object()` function only accepts a bitset of flags. In
a subsequent commit we'll want to change object iteration to also
support iterating over only those objects that have a specific prefix.
While we could of course add the prefix to the function signature, or
alternatively introduce a new function, both of these options don't
really seem to be that sensible.
Instead, introduce a new `struct odb_for_each_object_options` that can
be passed to a new `odb_for_each_object_ext()` function. Splice through
the options structure into the respective object database sources.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Generalize the function introduced in the preceding commit to not only
be able to approximate the number of loose objects, but to also provide
an accurate count. The behaviour can be toggled via a new flag.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In "builtin/gc.c" we have some logic that checks whether we need to
repack objects. This is done by counting the number of objects that we
have and checking whether it exceeds a certain threshold. We don't
really need an accurate object count though, which is why we only
open a single object directory shard and then extrapolate from there.
Extract this logic into a new function that is owned by the loose object
database source. This is done to prepare for a subsequent change, where
we'll introduce object counting on the object database source level.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"fsck" iterates over packfiles and its access to pack data caused
the list to be permuted, which caused it to loop forever; the code
to access pack data by "fsck" has been updated to avoid this.
* ps/fsck-stream-from-the-right-object-instance:
pack-check: fix verification of large objects
packfile: expose function to read object stream for an offset
object-file: adapt `stream_object_signature()` to take a stream
t/helper: improve "genrandom" test helper
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A couple of bugs in use of flag bits around odb API has been
corrected, and the flag bits reordered.
* ps/object-info-bits-cleanup:
odb: convert `odb_has_object()` flags into an enum
odb: convert object info flags into an enum
odb: drop gaps in object info flag values
builtin/fsck: fix flags passed to `odb_has_object()`
builtin/backfill: fix flags passed to `odb_has_object()`
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Revamp object enumeration API around odb.
* ps/odb-for-each-object:
odb: drop unused `for_each_{loose,packed}_object()` functions
reachable: convert to use `odb_for_each_object()`
builtin/pack-objects: use `packfile_store_for_each_object()`
odb: introduce mtime fields for object info requests
treewide: drop uses of `for_each_{loose,packed}_object()`
treewide: enumerate promisor objects via `odb_for_each_object()`
builtin/fsck: refactor to use `odb_for_each_object()`
odb: introduce `odb_for_each_object()`
packfile: introduce function to iterate through objects
packfile: extract function to iterate through objects of a store
object-file: introduce function to iterate through objects
object-file: extract function to read object info from path
odb: fix flags parameter to be unsigned
odb: rename `FOR_EACH_OBJECT_*` flags
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The function `stream_object_signature()` is responsible for verifying
whether the given object ID matches the actual hash of the object's
contents. In contrast to `check_object_signature()` it does so in a
streaming fashion so that we don't have to load the full object into
memory.
In a subsequent commit we'll want to adapt one of its callsites to pass
a preconstructed stream. Prepare for this by accepting a stream as input
that the caller needs to assemble.
While at it, improve the error reporting in `parse_object_with_flags()`
to tell apart the two failure modes.
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Convert the object info flags into an enum and adapt all functions that
receive these flags as parameters to use the enum instead of an integer.
This serves two purposes:
- The function signatures become more self-documenting, as callers
don't have to wonder which flags they expect.
- The compiler can warn when a wrong flag type is passed.
Note that the second benefit is somewhat limited. For example, when
or-ing multiple enum flags together the result will be an integer, and
the compiler will not warn about such use cases. But where it does help
is when a single flag of the wrong type is passed, as the compiler would
generate a warning in that case.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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An ODB transaction handles how objects are stored temporarily and
eventually committed. Due to object storage being implemented
differently for a given ODB source, the ODB transactions must be
implemented in a manner specific to the source the objects are being
written to. To provide generic transactions, `struct odb_transaction` is
updated to store a commit callback that can be configured to support a
specific ODB source. For now `struct odb_transaction_files` is the
only transaction type and what is always returned when starting a
transaction.
Signed-off-by: Justin Tobler <jltobler@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In a subsequent commit, ODB transactions are made more generic to
facilitate each ODB source providing its own transaction handling.
Rename `object_file_transaction_{begin,commit}()` to
`odb_transaction_files_{begin,commit}()` to better match the future
source specific transaction implementation.
Signed-off-by: Justin Tobler <jltobler@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We have converted all callers of `for_each_loose_object()` and
`for_each_packed_object()` to use their new replacement functions
instead. We can thus remove them now.
Do so and inline `packfile_store_for_each_object_internal()` now that it
only has a single callsite again. This makes it a bit easier to follow
the callback indirection that is happening there.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Introduce a new function `odb_for_each_object()` that knows to iterate
through all objects part of a given object database. This function is
essentially a simple wrapper around the object database sources.
Subsequent commits will adapt callers to use this new function.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We have multiple divergent interfaces to iterate through objects of a
specific backend:
- `for_each_loose_object()` yields all loose objects.
- `for_each_packed_object()` (somewhat obviously) yields all packed
objects.
These functions have different function signatures, which makes it hard
to create a common abstraction layer that covers both of these.
Introduce a new function `odb_source_loose_for_each_object()` to plug
this gap. This function doesn't take any data specific to loose objects,
but instead it accepts a `struct object_info` that will be populated the
exact same as if `odb_source_loose_read_object()` was called.
The benefit of this new interface is that we can continue to pass
backend-specific data, as `struct object_info` contains a union for
these exact use cases. This will allow us to unify how we iterate
through objects across both loose and packed objects in a subsequent
commit.
The `for_each_loose_object()` function continues to exist for now, but
it will be removed at the end of this patch series.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The `flags` parameter accepted by various `for_each_object()` functions
is a bitfield of multiple flags. Such parameters are typically unsigned
in the Git codebase, but we use `enum odb_for_each_object_flags` in
some places.
Adapt these function signatures to use the correct type.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Rename the `FOR_EACH_OBJECT_*` flags to have an `ODB_` prefix. This
prepares us for a new upcoming `odb_for_each_object()` function and
ensures that both the function and its flags have the same prefix.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Move the logic to read loose object streams into the respective
subsystem. This allows us to make a couple of function declarations
private.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We have two different ways to write an object into the database:
- We either provide the full buffer and write the object all at once.
- Or we provide an input stream that has a `read()` function so that
we can chunk the object.
The latter is especially used for large objects, where it may be too
expensive to hold the complete object in memory all at once.
While we already have `odb_write_object()` at the ODB-layer, we don't
have an equivalent for streaming an object. Introduce a new function
`odb_write_object_stream()` to address this gap so that callers don't
have to be aware of the inner workings of how to stream an object to
disk with a specific object source.
Rename `stream_loose_object()` to `odb_source_loose_write_stream()` to
clarify its scope. This matches our modern best practices around how to
name functions.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Rename `write_object_file()` to `odb_source_loose_write_object()` so
that it becomes clear that this is tied to a specific loose object
source. This matches our modern naming schema for functions.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When writing an object that already exists in our object database we
skip the write and instead only update mtimes of the object, either in
its packed or loose object format. This logic is wholly contained in
"object-file.c", but that file is really only concerned with loose
objects. So it does not really make sense that it also contains the
logic to freshen a packed object.
Introduce a new `odb_freshen_object()` function that sits on the object
database level and two functions `packfile_store_freshen_object()` and
`odb_source_loose_freshen_object()`. Like this, the format-specific
functions can be part of their respective subsystems, while the backend
agnostic function to freshen an object sits at the object database
layer.
Note that this change also moves the logic that iterates through object
sources from the object source layer into the object database layer.
This change is intentional: object sources should ideally only have to
worry about themselves, and coordination of different sources should be
handled on the object database level.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Rename `has_loose_object()` to `odb_source_loose_has_object()` so that
it becomes clear that this is tied to a specific loose object source.
This matches our modern naming schema for functions.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When reading an object via `loose_object_info()` or `map_loose_object()`
we hand in the whole repository. We then iterate through each of the
object sources to figure out whether that source has the object in
question.
This logic is reversing responsibility though: a specific backend should
only care about one specific source, where the object sources themselves
are then managed by the object database.
Refactor the code accordingly by passing an object source to both of
these functions instead. The different sources are then handled by
either `do_oid_object_info_extended()`, which sits on the object
database level, and by `open_istream_loose()`. The latter function
arguably is still at the wrong level, but this will be cleaned up at a
later point in time.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The loose object map is used to map from the repository's canonical
object hash to the compatibility hash. As the name indicates, this map
is only used for loose objects, and as such it is tied to a specific
loose object source.
Same as with preceding commits, move this map into the loose object
source accordingly.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There are two different situations where we have to clear the cache of
loose objects:
- When freeing the loose object source itself to avoid memory leaks.
- When repreparing the loose object source so that any potentially-
stale data is getting evicted from the cache.
The former is already handled by `odb_source_loose_free()`. But the
latter case is still done manually by in `odb_reprepare()`, so we are
leaking internals into that code.
Introduce a new `odb_source_loose_reprepare()` function as an equivalent
to `packfile_store_prepare()` to hide these implementation details.
Furthermore, while at it, rename the function `odb_clear_loose_cache()`
to `odb_source_loose_clear()`.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Our loose objects use a cache that (optionally) stores all objects for
each of the opened sharding directories. This cache is located in the
`struct odb_source`, but now that we have `struct odb_source_loose` it
makes sense to move it into the latter structure so that all state that
relates to loose objects is entirely self-contained.
Do so. While at it, rename corresponding functions to have a prefix that
relates to `struct odb_source_loose`.
Note that despite this prefix, the functions still accept a `struct
odb_source` as input. This is done intentionally: once we introduce
pluggable object databases, we will continue to accept this struct but
then do a cast inside these functions to `struct odb_source_loose`. This
design is similar to how we do it for our ref backends.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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