Typically PosixSourceAccessor can be used from multiple threads,
but mtime is not updated atomically (i.e. with compare_exchange_weak),
so mtime gets raced. It's only needed in dumpPathAndGetMtime and mtime
tracking can be gated behind that.
Also start using getLastModified interface instead of dynamic casts.
This makes the output easier to compare with the new machine-generated
lists in #9732.
The hand-curated order did have the advantage of putting more important
attributes at the top, but I don't think it is worth preserving that
when `std::map` is so much easier to work with. The right solution to
leading the reader to the more important attributes is to call them out
in the intro texts.
This makes the proto serializer characterisation test data be
accompanied by JSON data.
This is arguably useful for a reasons:
- The JSON data is human-readable while the binary data is not, so it
provides some indication of what the test data means beyond the C++
literals.
- The JSON data is language-agnostic, and so can be used to quickly rig
up tests for implementation in other languages, without having source
code literals at all (just go back and forth between the JSON and the
binary).
- Even though we have no concrete plans to place the binary protocol 1-1
or with JSON, it is still nice to ensure that the JSON serializers and
binary protocols have (near) equal coverage over data types, to help
ensure we didn't forget a JSON (de)serializer.
Make instances for them that share code with `nix path-info`, but do a
slightly different format without store paths containing store dirs
(matching the other latest JSON formats).
Progress on #13570.
If we depend on the store dir, our JSON serializers/deserializers take
extra arguements, and that interfaces with the likes of various
frameworks for associating these with types (e.g. nlohmann in C++, Serde
in Rust, and Aeson in Haskell).
For now, `nix path-info` still uses the previous format, with store
dirs. We may yet decide to "rip of the band-aid", and just switch it
over, but that is left as a future PR.
The variant has on the left-hand side the topologically sorted vector
and the right-hand side is a pair showing the path and its parent that
represent a cycle in the graph making the sort impossible.
This change prepares for enhanced cycle error messages that can provide
more context about the cycle. The variant approach allows callers to
handle cycles more flexibly, enabling better error reporting that shows
the full cycle path and which files are involved.
Adapted from Lix commit f7871fcb5.
Change-Id: I70a987f470437df8beb3b1cc203ff88701d0aa1b
Co-Authored-By: Maximilian Bosch <maximilian@mbosch.me>
Add support for configuring S3 storage class via the storage-class
parameter for S3BinaryCacheStore. This allows users to optimize costs
by selecting appropriate storage tiers (STANDARD, GLACIER,
INTELLIGENT_TIERING, etc.) based on access patterns.
The storage class is applied via the x-amz-storage-class header for
both regular PUT uploads and multipart upload initiation.
Replace the null-terminated C-style strings in Value with hybrid C /
Pascal strings, where the length is stored in the allocation before the
data, and there is still a null byte at the end for the sake of C
interopt.
Co-Authored-By: Taeer Bar-Yam <taeer@bar-yam.me>
Co-Authored-By: Sergei Zimmerman <sergei@zimmerman.foo>
