Summary:
On Windows, EPIPE's raw os error might be 232, different from libc::EPIPE (32).
That means the Python world cannot check the errno properly to hide the EPIPE
error message. Fix it by reading io::ErrorKind first, and fallback to
raw_os_error.
Reviewed By: yancouto
Differential Revision: D30118006
fbshipit-source-id: b34a2142b24714e68d11a03a0771a5f9c037ed0f
Summary:
cpython-ext is not part of hg business APIs. It does not need to be consistent
with lower-case class name (and hg codebase is okay with non-lowercase class names,
just that most classes there are lower-case).
This resolves a rustc warning about the struct name.
Reviewed By: kulshrax
Differential Revision: D29526579
fbshipit-source-id: a4bc8e788d55c65aae9eaa87e2c684c2fded7ae2
Summary: The use case here is that we can export rust struct into python object, manipulate python object and then convert it back into rust struct
Reviewed By: quark-zju
Differential Revision: D29525281
fbshipit-source-id: 393c8a430a76c720c155432d732085892d56521a
Summary:
Previously Serde<T> required T to implement bunch of traits like Eq, Clone etc
This diff lifts this restriction and only implements those traits for Serde if T implements them, but does not require them
Reviewed By: quark-zju
Differential Revision: D29521112
fbshipit-source-id: e9387b08ab129fc1f2450f6c88fa7fe0f6451349
Summary:
We currently encode/decode data when passing it between pull_fast_forward_master and importpulldata and some other cases
pycell is alternative to that, allowing to just transfer pointer, instead of encoding data
Reviewed By: quark-zju
Differential Revision: D29474444
fbshipit-source-id: aabbbb670fde08645031c199afbdeab5cc9093d8
Summary: Update versions for several of the crates we depend on.
Reviewed By: danobi
Differential Revision: D29165283
fbshipit-source-id: baaa9fa106b7dad000f93d2eefa95867ac46e5a1
Summary: This will be used later.
Reviewed By: skotchvail
Differential Revision: D27744058
fbshipit-source-id: 411ab66ccc38b306c6bffb190e936ba1e455f07a
Summary:
eden/scm/lib: default cpython_ext to python3
```
CI internally, try a PR on github once its landed.
Reviewed By: quark-zju
Differential Revision: D27237636
fbshipit-source-id: 1768f778d75b5d6c62dfd5641f911604a37d3163
Summary: This diff removes the split between manually managed and autocargo managed Cargo.toml files in `eden/scm/lib`, now all files are autogenerated.
Reviewed By: quark-zju
Differential Revision: D26830884
fbshipit-source-id: 3a5d8409a61347c7650cc7d8192fa426c03733dc
Summary:
Add a new API to test if a stream is a tty. This is needed to replace the
Python `fin`, `fout` etc. to Rust objects, because the Python land requires the
`istty` API. It is also useful for properly implement color detection in the
pure Rust land.
Reviewed By: sfilipco
Differential Revision: D26612480
fbshipit-source-id: 5cf79447b1d74e0031a954788db342afd48dc288
Summary:
This can be used to automate Python/Rust conversions for complex structures
like `CommitRevlogData`.
Reviewed By: kulshrax
Differential Revision: D23966988
fbshipit-source-id: 17a19d38270e6ef0952c13a1cd778487e84a94ff
Summary:
The goal is to implement `FromPyObject` and `ToPyObject` more easily.
Today crates have to dependent on `cpython` to implement `From/ToPyObject`,
which is somewhat unwanted for pure Rust crates.
The `ser` module used to ignore the `variant` field for non-unit enum variants.
They have been fixed so the serialized value can be deserialized correctly.
For example, `enum E { A, B(T) }` will be serialized to `"A"` for `E::A`, and
`{"B": T}` for `E::B`.
Reviewed By: kulshrax
Differential Revision: D23966994
fbshipit-source-id: c50d57bf313caeec65a604ed9b05a5729f3b3635
Summary: This can be used by dag::Vertex and minibytes::Bytes.
Reviewed By: kulshrax
Differential Revision: D23966985
fbshipit-source-id: 3b4b29648e038ef49f26ce2b500119e148544d9e
Summary:
The exposed type can be used as a Python iterator:
for value in stream:
...
The Python type can be used as input and output parameters in binding functions:
# Rust
type S = TStream<anyhow::Result<X>>;
def f1() -> PyResult<S> { ... }
def f2(x: S) -> PyResult<S> { Ok(x.stream().map_ok(...).into()) }
# Python
stream1 = f1()
stream2 = f2(stream1)
This crate is similar to `cpython-ext`: it does not define actual business
logic exposed by `bindings` module. So it's put in `lib`, not
`bindings/modules`.
Reviewed By: markbt
Differential Revision: D23799641
fbshipit-source-id: c13b0c788a6465679b562976728f0002fd872bee
Summary:
Introduce taggederror-util, which provides a new trait `AnyhowEdenExt`, which provides a method `eden_metadata` for anyhow errors and results. This method works much like `AnyhowExt::common_metadata`, but additionally supports extracting default error metadata from known `Tagged` types which are listed explicitly in the method implementation.
Extend `FilteredAnyhow` to support a configuration "metadata function", which allows swapping out `eden_metadata` for the standard `common_metadata`.
Modify Rust dispatch and Python bindings to use `AnyhowEdenExt` for metadata extraction and printing.
Modify `intentional_error` to rely on `AnyhowEdenExt` for tagging (removes `.tagged` call, no tags will be visible if `AnyhowEdenExt` is not used).
Reviewed By: DurhamG
Differential Revision: D22927203
fbshipit-source-id: 04b36fdfaa24af591118acb9e418d1ed7ae33f91
Summary:
Implements based Rust-Python binding layer for error metadata propagation.
We introduce a new type, `TaggedExceptionData`, which carries CommonMetadata and the original (without metadata) error message for a Rust Anyhow error. This class is passed to RustError and can be accessed in Python (somewhat awkwardly) via indexing:
```
except error.RustError as e:
fault = e.args[0].fault()
typename = e.args[0].typename()
message = e.args[0].message()
```
As far as I can tell, due to limitations in cpython-rs, this can't be made more ergonomic without introducing a Python shim around the Rust binding layer, which could adapt the cpython-rs classes to use whatever API we'd like.
Currently, anyhow errors that are not otherwise special-cased will be converted into RustError, with both the original error message and any attached metadata printed as shown below
```
abort: intentional error for debugging with message 'intentional_error'
error has type name taggederror::IntentionalError and fault None
```
We can of course re-raise the error if desired to maintain the previous behavior for handling a RustError.
If we'd like other, specialized Rust Python Exception types to carry metadata (such as `IndexedLogError`), we'll need to modify them to accept a `TaggedExceptionData` like `RustError`.
Renamed the "cause an error in pure rust command" function to `debugcauserusterror`, and instead used the name `debugthrowrustexception` for a command which causes an error in rust which is converted to a Python exception across the binding layer.
Introduced a simple integration test which exercises `debugthrowrustexception`.
Added a basic handler for RustError to scmutil.py
Reviewed By: DurhamG
Differential Revision: D22517796
fbshipit-source-id: 0409489243fe739a26958aad48f608890eb93aa0
Summary: Per comments on D22429347, add a new `ExtractInnerRef` trait that is similar to `ExtractInner`, but returns a reference to the underlying value. A default implementation is provided for types whose inner value is `Clone + 'static`, so in practice most types will only need to implement `ExtractInnerRef`, whereas the callsite may choose whether it needs a reference or an owned value.
Reviewed By: quark-zju
Differential Revision: D22464158
fbshipit-source-id: 7b97329aedcddb0e51fd242b519e79eba2eed350
Summary:
A common pattern in Mercurial's data storage layer Python bindings is to have a Python object that wraps a Rust object. These Python objects are often passed across the FFI boundary to Rust code, which then may need to access the underlying Rust value.
Previously, the objects that used this pattern did so in an ad-hoc manner, typically by providing an `into_inner` or `to_inner` inherent method. This diff introduces a new `ExtractInner` trait that standardizes this pattern into a single interface, which in turn allows this pattern to be used with generics.
Reviewed By: quark-zju
Differential Revision: D22429347
fbshipit-source-id: cab4c24b8b98c6ef8307f72a9b4726aabdc829cc
Summary: Replaces usages of whitelist/blacklist with include/exclude/allow. These terms are more descriptive and less likely to contribute to racial stereotyping. More context: https://fb.workplace.com/groups/sourcecontrolteam/permalink/2926049127516414/
Reviewed By: farnz
Differential Revision: D22039299
fbshipit-source-id: d5b4cdeca681e1f4c992f7ef0b9f772b2ae1abd3
Summary:
Sometimes the Rust io::Error is generated without an errno (ex. pipe
0.2 would generate BrokenPipe error without an errno). The Python
land uses errno to check error type (Python does not have io::ErrorKind).
Therefore attempt to translate ErrorKind to Python errno. Without this
exiting the rust pager early would crash like:
StdioError: [Errno None] pipe reader has been dropped
abort: pipe reader has been dropped
Reviewed By: markbt
Differential Revision: D20898559
fbshipit-source-id: ef863617e0e500d878ea0f9aeac06b4d87ffbcf2
Summary:
According to the anyhow documentation[0], the behavior of `.to_string()` is to
only stringify the top-level errors, hiding all the context of the error.
Instead, the debug format allows all the context to be displayed, and, if
available the backtrace.
This should significantly help debug Rust errors when context is available,
which we should strive to have everywhere!
[0]: https://docs.rs/anyhow/1.0.27/anyhow/struct.Error.html#display-representations
Reviewed By: sfilipco
Differential Revision: D20575944
fbshipit-source-id: 2968d7fb755edec7f7e5151138e8049ded181c1b
Summary:
Previously Rust str was serialized into bytes. To be Python 3 friendly, let's
serialize it into `str`.
Reviewed By: markbt
Differential Revision: D19797706
fbshipit-source-id: 388eb044dc7e25cdc438f0c3d6fa5a5740f22e3d
Summary:
The library already has a way to wrap a Python object into a Rust object that
exposes the Rust Read/Write interface. This is the reverse direction for
the Write interface.
The initial intention is to expose Rust stdout as described in D19702533.
However, I found Python's `sys.stdout.buffer` also enforces utf-8 encoding
on Windows (unless PYTHONLEGACYWINDOWSSTDIO is set). So Python's
stdout actually behaves similarly with Rust's stdout on Windows and is okay
to use. That said, it's still useful to have this abstraction, for streampager [1]
integration.
[1]: https://github.com/markbt/streampager/
Reviewed By: sfilipco
Differential Revision: D19716127
fbshipit-source-id: ba39898122561d9a49b7080ee95d7c940540eb40
Summary: `PyPath` is to `PyPathBuf` as `Path` is to `PathBuf` and `str` is to `String`.
Reviewed By: quark-zju
Differential Revision: D19647995
fbshipit-source-id: 841a5f6fea295bc72b00da028ae256ca38578504
Summary: Add `PyNone`. This is a marker struct that indicates that a python function can only return `PyNone`.
Reviewed By: xavierd
Differential Revision: D19644338
fbshipit-source-id: f846b146237ebf7de996177494934fec662cde0f
Summary:
`PyPath` is the type that owns the data. Rename it to `PyPathBuf` for analogy
with `PathBuf` and `RepoPathBuf`, and to allow us to introduce a reference type
named `PyPath`.
Reviewed By: xavierd
Differential Revision: D19643797
fbshipit-source-id: 56d80fea5677f7223e967b0723039d1763b26f68
Summary:
Make the type easier to use. Namely, the treestate bindings want PyPath <->
bytes since treestate internally uses bytes.
Reviewed By: xavierd
Differential Revision: D19635357
fbshipit-source-id: 37d1889b5da1d7f3869bb7820de0219b87b71a8b
Summary:
Set up the `cpython-ext` and `hgcommands` libraries so that they can compile
against py2 and py3 versions of rust-cpython. Make py2 the default so
that cargo test still works.
Reviewed By: singhsrb
Differential Revision: D19615656
fbshipit-source-id: 3403e7077deb3c0a9dfe0e3b7d4f4ad1da73bba3
Summary: This is incorrectly removed due to a bad rebase / merge.
Reviewed By: DurhamG
Differential Revision: D19607801
fbshipit-source-id: a6ee7a3f184ff1882eb1f1513f7fed74a7108727
Summary:
This makes `make hg3` work. It requires cleaning up the `build` directory when
switching between py2 and py3 build, which will be fixed later.
Reviewed By: DurhamG
Differential Revision: D19604824
fbshipit-source-id: 060ff313420126a5dba935c4451b45dc9af45f13
Summary: Add methods to convert to a `Str` object from `String` and from `Vec[u8]`
Reviewed By: xavierd
Differential Revision: D19596743
fbshipit-source-id: 6499f7f1b8329f4d14ce8179a41ed46982a85c8e
Summary: Update to the new version of rust-cpython. This supports `list.append`, so make use of it.
Reviewed By: xavierd
Differential Revision: D19590905
fbshipit-source-id: 03609d4f698ae8e4380e82b8144caaa205b4c2d4
Summary:
This is optional, but it helps investigating Python errors chained with other
Rust errors.
For example:
error.RustError: failed fetching from store (, cc38739855a7f356b4a2aaac0a0a858fd646e6bf)
Caused by:
TypeError()
Traceback (most recent call last):
File "scm3/edenscm/hgext/remotefilelog/contentstore.py", line 53, in get
chain = self.getdeltachain(name, node)
File "scm3/edenscm/hgext/remotefilelog/contentstore.py", line 91, in getdeltachain
chain = self._getpartialchain(name, node)
File "scm3/edenscm/hgext/remotefilelog/contentstore.py", line 125, in _getpartialchain
return store.getdeltachain(name, node)
TypeError
Without this diff there is only "TypeError()" without the traceback.
This can be turned off by unsetting RUST_BACKTRACE.
Reviewed By: markbt
Differential Revision: D19581173
fbshipit-source-id: 74605b78146b6b1c9ddd5ad720dcd19ff73908a8
Summary: The format_err is used in shared code too, we need to import it.
Reviewed By: quark-zju
Differential Revision: D19592591
fbshipit-source-id: bd344bf3c295473f4647235a98432d11c9678bf9
Summary:
This will be used as an argument to the Rust bindings when using paths. This
type is either a PyBytes in Python2 and uses the various encoding function to
convert into a String, or a PyUnicode in Python3 with no encoding change.
Reviewed By: farnz
Differential Revision: D19587890
fbshipit-source-id: 58903426585693193754691fe3c756b9097b35f6
Summary:
Without this, Rust code using the feature (ex. lz4, used by lz4revlog) will
panic.
Reviewed By: sfilipco
Differential Revision: D19581188
fbshipit-source-id: b499449df4fede27fe66cf8e5af57e8347a0dd48
Summary: This converts to bytes on Python 2, but unicode on Python 3.
Reviewed By: markbt
Differential Revision: D19581180
fbshipit-source-id: 0de9056a01ae30810a72352387de5a940b37d7ab
Summary:
The Python `datatime` stdlib has limitations:
- `datetime.datetime` can only express year 1 to 9999.
- `strptime` requires year >= 1900.
Limit the `HgTime` to 1900 ..= 9999 range to be consistent.
Note: Mercurial has an `i32` range limit, which seems to problematic
since `i32::MAX` is Jan 19, 2038. So I kept using `i64`.
This addressed some XXX comments about not returning errors.
The code change is mostly because added error handling.
Reviewed By: sfilipco
Differential Revision: D18946333
fbshipit-source-id: 0e4756457b0f13451dc5008ef19d4670a7aaa7fb
Summary:
Make cpython-ext free from business logic. This adds a bit overhead.
But it should be fine given the error cases are considered rare.
Reviewed By: markbt
Differential Revision: D19186692
fbshipit-source-id: daaffc1369a36c781d1badea822bf62a144eb54e
Summary: We no longer use the `failure` crate. Rename related methods and traits.
Reviewed By: markbt
Differential Revision: D19186694
fbshipit-source-id: 1c83a90ee12db431b7d8e09a9c2cf1d43a4c0f93
Summary:
We no longer use the `failure` crate. Rename the module.
`cpython-failure` is dropped since it was merged into `cpython-ext`.
Reviewed By: markbt
Differential Revision: D19186693
fbshipit-source-id: 410d1491bcadd8d3272c7e2df08ecbe66fc0fef2
