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1
third-party/vendor/proc-macro-crate/.cargo-checksum.json
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third-party/vendor/proc-macro-crate/.cargo-checksum.json
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{"files":{"Cargo.toml":"89b6a468c16c6c8d2e5fd40a90f22e582556c6316603f5a8dff0892a403a3bec","LICENSE-APACHE":"8ada45cd9f843acf64e4722ae262c622a2b3b3007c7310ef36ac1061a30f6adb","LICENSE-MIT":"23f18e03dc49df91622fe2a76176497404e46ced8a715d9d2b67a7446571cca3","README.md":"bf71b469e066c36321488ff63927863e13ed35dd2f433a06db930055d4720b65","src/lib.rs":"6b8acb85a7a1dd254b96228bf85fcd3a0e1a0c3387f3263890968b1174640253"},"package":"7f4c021e1093a56626774e81216a4ce732a735e5bad4868a03f3ed65ca0c3919"}
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third-party/vendor/proc-macro-crate/Cargo.toml
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third-party/vendor/proc-macro-crate/Cargo.toml
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# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
|
||||
#
|
||||
# When uploading crates to the registry Cargo will automatically
|
||||
# "normalize" Cargo.toml files for maximal compatibility
|
||||
# with all versions of Cargo and also rewrite `path` dependencies
|
||||
# to registry (e.g., crates.io) dependencies.
|
||||
#
|
||||
# If you are reading this file be aware that the original Cargo.toml
|
||||
# will likely look very different (and much more reasonable).
|
||||
# See Cargo.toml.orig for the original contents.
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||||
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||||
[package]
|
||||
edition = "2021"
|
||||
rust-version = "1.60.0"
|
||||
name = "proc-macro-crate"
|
||||
version = "1.3.1"
|
||||
authors = ["Bastian Köcher <git@kchr.de>"]
|
||||
description = """
|
||||
Replacement for crate (macro_rules keyword) in proc-macros
|
||||
"""
|
||||
documentation = "https://docs.rs/proc-macro-crate"
|
||||
readme = "./README.md"
|
||||
keywords = [
|
||||
"macro-rules",
|
||||
"crate",
|
||||
"macro",
|
||||
"proc-macro",
|
||||
]
|
||||
categories = ["development-tools::procedural-macro-helpers"]
|
||||
license = "MIT OR Apache-2.0"
|
||||
repository = "https://github.com/bkchr/proc-macro-crate"
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||||
|
||||
[dependencies.once_cell]
|
||||
version = "1.13.0"
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||||
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||||
[dependencies.toml_edit]
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||||
version = "0.19"
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||||
[dev-dependencies.proc-macro2]
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||||
version = "1.0.18"
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||||
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||||
[dev-dependencies.quote]
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||||
version = "1.0.7"
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||||
|
||||
[dev-dependencies.syn]
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||||
version = "1.0.33"
|
||||
201
third-party/vendor/proc-macro-crate/LICENSE-APACHE
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201
third-party/vendor/proc-macro-crate/LICENSE-APACHE
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87
third-party/vendor/proc-macro-crate/README.md
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87
third-party/vendor/proc-macro-crate/README.md
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@ -0,0 +1,87 @@
|
|||
# proc-macro-crate
|
||||
|
||||
|
||||
[](https://docs.rs/proc-macro-crate/) [](https://crates.io/crates/proc-macro-crate) [](https://crates.io/crates/proc-macro-crate) [](https://travis-ci.org/bkchr/proc-macro-crate)
|
||||
|
||||
Providing support for `$crate` in procedural macros.
|
||||
|
||||
* [Introduction](#introduction)
|
||||
* [Example](#example)
|
||||
* [License](#license)
|
||||
|
||||
### Introduction
|
||||
|
||||
In `macro_rules!` `$crate` is used to get the path of the crate where a macro is declared in. In
|
||||
procedural macros there is currently no easy way to get this path. A common hack is to import the
|
||||
desired crate with a know name and use this. However, with rust edition 2018 and dropping
|
||||
`extern crate` declarations from `lib.rs`, people start to rename crates in `Cargo.toml` directly.
|
||||
However, this breaks importing the crate, as the proc-macro developer does not know the renamed
|
||||
name of the crate that should be imported.
|
||||
|
||||
This crate provides a way to get the name of a crate, even if it renamed in `Cargo.toml`. For this
|
||||
purpose a single function `crate_name` is provided. This function needs to be called in the context
|
||||
of a proc-macro with the name of the desired crate. `CARGO_MANIFEST_DIR` will be used to find the
|
||||
current active `Cargo.toml` and this `Cargo.toml` is searched for the desired crate.
|
||||
|
||||
### Example
|
||||
|
||||
```rust
|
||||
use quote::quote;
|
||||
use syn::Ident;
|
||||
use proc_macro2::Span;
|
||||
use proc_macro_crate::{crate_name, FoundCrate};
|
||||
|
||||
fn import_my_crate() {
|
||||
let found_crate = crate_name("my-crate").expect("my-crate is present in `Cargo.toml`");
|
||||
|
||||
match found_crate {
|
||||
FoundCrate::Itself => quote!( crate::Something ),
|
||||
FoundCrate::Name(name) => {
|
||||
let ident = Ident::new(&name, Span::call_site());
|
||||
quote!( #ident::Something )
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
### Edge cases
|
||||
|
||||
There are multiple edge cases when it comes to determining the correct crate. If you for example
|
||||
import a crate as its own dependency, like this:
|
||||
|
||||
```toml
|
||||
[package]
|
||||
name = "my_crate"
|
||||
|
||||
[dev-dependencies]
|
||||
my_crate = { version = "0.1", features = [ "test-feature" ] }
|
||||
```
|
||||
|
||||
The crate will return `FoundCrate::Itself` and you will not be able to find the other instance
|
||||
of your crate in `dev-dependencies`. Other similar cases are when one crate is imported multiple
|
||||
times:
|
||||
|
||||
```toml
|
||||
[package]
|
||||
name = "my_crate"
|
||||
|
||||
[dependencies]
|
||||
some-crate = { version = "0.5" }
|
||||
some-crate-old = { package = "some-crate", version = "0.1" }
|
||||
```
|
||||
|
||||
When searching for `some-crate` in this `Cargo.toml` it will return `FoundCrate::Name("some_old_crate")`,
|
||||
aka the last definition of the crate in the `Cargo.toml`.
|
||||
|
||||
### License
|
||||
|
||||
Licensed under either of
|
||||
|
||||
* [Apache License, Version 2.0](https://www.apache.org/licenses/LICENSE-2.0)
|
||||
|
||||
* [MIT license](https://opensource.org/licenses/MIT)
|
||||
|
||||
at your option.
|
||||
|
||||
License: MIT OR Apache-2.0
|
||||
438
third-party/vendor/proc-macro-crate/src/lib.rs
vendored
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438
third-party/vendor/proc-macro-crate/src/lib.rs
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|
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@ -0,0 +1,438 @@
|
|||
/*!
|
||||
|
||||
[](https://docs.rs/proc-macro-crate/) [](https://crates.io/crates/proc-macro-crate) [](https://crates.io/crates/proc-macro-crate) [](https://travis-ci.org/bkchr/proc-macro-crate)
|
||||
|
||||
Providing support for `$crate` in procedural macros.
|
||||
|
||||
* [Introduction](#introduction)
|
||||
* [Example](#example)
|
||||
* [License](#license)
|
||||
|
||||
## Introduction
|
||||
|
||||
In `macro_rules!` `$crate` is used to get the path of the crate where a macro is declared in. In
|
||||
procedural macros there is currently no easy way to get this path. A common hack is to import the
|
||||
desired crate with a know name and use this. However, with rust edition 2018 and dropping
|
||||
`extern crate` declarations from `lib.rs`, people start to rename crates in `Cargo.toml` directly.
|
||||
However, this breaks importing the crate, as the proc-macro developer does not know the renamed
|
||||
name of the crate that should be imported.
|
||||
|
||||
This crate provides a way to get the name of a crate, even if it renamed in `Cargo.toml`. For this
|
||||
purpose a single function `crate_name` is provided. This function needs to be called in the context
|
||||
of a proc-macro with the name of the desired crate. `CARGO_MANIFEST_DIR` will be used to find the
|
||||
current active `Cargo.toml` and this `Cargo.toml` is searched for the desired crate.
|
||||
|
||||
## Example
|
||||
|
||||
```
|
||||
use quote::quote;
|
||||
use syn::Ident;
|
||||
use proc_macro2::Span;
|
||||
use proc_macro_crate::{crate_name, FoundCrate};
|
||||
|
||||
fn import_my_crate() {
|
||||
let found_crate = crate_name("my-crate").expect("my-crate is present in `Cargo.toml`");
|
||||
|
||||
match found_crate {
|
||||
FoundCrate::Itself => quote!( crate::Something ),
|
||||
FoundCrate::Name(name) => {
|
||||
let ident = Ident::new(&name, Span::call_site());
|
||||
quote!( #ident::Something )
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
# fn main() {}
|
||||
```
|
||||
|
||||
## Edge cases
|
||||
|
||||
There are multiple edge cases when it comes to determining the correct crate. If you for example
|
||||
import a crate as its own dependency, like this:
|
||||
|
||||
```toml
|
||||
[package]
|
||||
name = "my_crate"
|
||||
|
||||
[dev-dependencies]
|
||||
my_crate = { version = "0.1", features = [ "test-feature" ] }
|
||||
```
|
||||
|
||||
The crate will return `FoundCrate::Itself` and you will not be able to find the other instance
|
||||
of your crate in `dev-dependencies`. Other similar cases are when one crate is imported multiple
|
||||
times:
|
||||
|
||||
```toml
|
||||
[package]
|
||||
name = "my_crate"
|
||||
|
||||
[dependencies]
|
||||
some-crate = { version = "0.5" }
|
||||
some-crate-old = { package = "some-crate", version = "0.1" }
|
||||
```
|
||||
|
||||
When searching for `some-crate` in this `Cargo.toml` it will return `FoundCrate::Name("some_old_crate")`,
|
||||
aka the last definition of the crate in the `Cargo.toml`.
|
||||
|
||||
## License
|
||||
|
||||
Licensed under either of
|
||||
|
||||
* [Apache License, Version 2.0](https://www.apache.org/licenses/LICENSE-2.0)
|
||||
|
||||
* [MIT license](https://opensource.org/licenses/MIT)
|
||||
|
||||
at your option.
|
||||
*/
|
||||
|
||||
use std::{
|
||||
collections::btree_map::{self, BTreeMap},
|
||||
env, fmt, fs, io,
|
||||
path::{Path, PathBuf},
|
||||
sync::Mutex,
|
||||
time::SystemTime,
|
||||
};
|
||||
|
||||
use once_cell::sync::Lazy;
|
||||
use toml_edit::{Document, Item, Table, TomlError};
|
||||
|
||||
/// Error type used by this crate.
|
||||
#[derive(Debug)]
|
||||
pub enum Error {
|
||||
NotFound(PathBuf),
|
||||
CargoManifestDirNotSet,
|
||||
CouldNotRead { path: PathBuf, source: io::Error },
|
||||
InvalidToml { source: TomlError },
|
||||
CrateNotFound { crate_name: String, path: PathBuf },
|
||||
}
|
||||
|
||||
impl std::error::Error for Error {
|
||||
fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
|
||||
match self {
|
||||
Error::CouldNotRead { source, .. } => Some(source),
|
||||
Error::InvalidToml { source } => Some(source),
|
||||
_ => None,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl fmt::Display for Error {
|
||||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||||
match self {
|
||||
Error::NotFound(path) => write!(
|
||||
f,
|
||||
"Could not find `Cargo.toml` in manifest dir: `{}`.",
|
||||
path.display()
|
||||
),
|
||||
Error::CargoManifestDirNotSet => {
|
||||
f.write_str("`CARGO_MANIFEST_DIR` env variable not set.")
|
||||
}
|
||||
Error::CouldNotRead { path, .. } => write!(f, "Could not read `{}`.", path.display()),
|
||||
Error::InvalidToml { .. } => f.write_str("Invalid toml file."),
|
||||
Error::CrateNotFound { crate_name, path } => write!(
|
||||
f,
|
||||
"Could not find `{}` in `dependencies` or `dev-dependencies` in `{}`!",
|
||||
crate_name,
|
||||
path.display(),
|
||||
),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// The crate as found by [`crate_name`].
|
||||
#[derive(Debug, PartialEq, Clone, Eq)]
|
||||
pub enum FoundCrate {
|
||||
/// The searched crate is this crate itself.
|
||||
Itself,
|
||||
/// The searched crate was found with this name.
|
||||
Name(String),
|
||||
}
|
||||
|
||||
// In a rustc invocation, there will only ever be one entry in this map, since every crate is
|
||||
// compiled with its own rustc process. However, the same is not (currently) the case for
|
||||
// rust-analyzer.
|
||||
type Cache = BTreeMap<String, CacheEntry>;
|
||||
|
||||
struct CacheEntry {
|
||||
manifest_ts: SystemTime,
|
||||
crate_names: CrateNames,
|
||||
}
|
||||
|
||||
type CrateNames = BTreeMap<String, FoundCrate>;
|
||||
|
||||
/// Find the crate name for the given `orig_name` in the current `Cargo.toml`.
|
||||
///
|
||||
/// `orig_name` should be the original name of the searched crate.
|
||||
///
|
||||
/// The current `Cargo.toml` is determined by taking `CARGO_MANIFEST_DIR/Cargo.toml`.
|
||||
///
|
||||
/// # Returns
|
||||
///
|
||||
/// - `Ok(orig_name)` if the crate was found, but not renamed in the `Cargo.toml`.
|
||||
/// - `Ok(RENAMED)` if the crate was found, but is renamed in the `Cargo.toml`. `RENAMED` will be
|
||||
/// the renamed name.
|
||||
/// - `Err` if an error occurred.
|
||||
///
|
||||
/// The returned crate name is sanitized in such a way that it is a valid rust identifier. Thus,
|
||||
/// it is ready to be used in `extern crate` as identifier.
|
||||
pub fn crate_name(orig_name: &str) -> Result<FoundCrate, Error> {
|
||||
let manifest_dir = env::var("CARGO_MANIFEST_DIR").map_err(|_| Error::CargoManifestDirNotSet)?;
|
||||
let manifest_path = Path::new(&manifest_dir).join("Cargo.toml");
|
||||
let manifest_ts = cargo_toml_timestamp(&manifest_path)?;
|
||||
|
||||
// This `Lazy<Mutex<_>>` can just be a `Mutex<_>` starting in Rust 1.63:
|
||||
// https://doc.rust-lang.org/beta/std/sync/struct.Mutex.html#method.new
|
||||
static CACHE: Lazy<Mutex<Cache>> = Lazy::new(Mutex::default);
|
||||
let mut cache = CACHE.lock().unwrap();
|
||||
|
||||
let crate_names = match cache.entry(manifest_dir) {
|
||||
btree_map::Entry::Occupied(entry) => {
|
||||
let cache_entry = entry.into_mut();
|
||||
|
||||
// Timestamp changed, rebuild this cache entry.
|
||||
if manifest_ts != cache_entry.manifest_ts {
|
||||
*cache_entry = read_cargo_toml(&manifest_path, manifest_ts)?;
|
||||
}
|
||||
|
||||
&cache_entry.crate_names
|
||||
}
|
||||
btree_map::Entry::Vacant(entry) => {
|
||||
let cache_entry = entry.insert(read_cargo_toml(&manifest_path, manifest_ts)?);
|
||||
&cache_entry.crate_names
|
||||
}
|
||||
};
|
||||
|
||||
Ok(crate_names
|
||||
.get(orig_name)
|
||||
.ok_or_else(|| Error::CrateNotFound {
|
||||
crate_name: orig_name.to_owned(),
|
||||
path: manifest_path,
|
||||
})?
|
||||
.clone())
|
||||
}
|
||||
|
||||
fn cargo_toml_timestamp(manifest_path: &Path) -> Result<SystemTime, Error> {
|
||||
fs::metadata(manifest_path)
|
||||
.and_then(|meta| meta.modified())
|
||||
.map_err(|source| {
|
||||
if source.kind() == io::ErrorKind::NotFound {
|
||||
Error::NotFound(manifest_path.to_owned())
|
||||
} else {
|
||||
Error::CouldNotRead {
|
||||
path: manifest_path.to_owned(),
|
||||
source,
|
||||
}
|
||||
}
|
||||
})
|
||||
}
|
||||
|
||||
fn read_cargo_toml(manifest_path: &Path, manifest_ts: SystemTime) -> Result<CacheEntry, Error> {
|
||||
let manifest = open_cargo_toml(manifest_path)?;
|
||||
let crate_names = extract_crate_names(&manifest)?;
|
||||
|
||||
Ok(CacheEntry {
|
||||
manifest_ts,
|
||||
crate_names,
|
||||
})
|
||||
}
|
||||
|
||||
/// Make sure that the given crate name is a valid rust identifier.
|
||||
fn sanitize_crate_name<S: AsRef<str>>(name: S) -> String {
|
||||
name.as_ref().replace('-', "_")
|
||||
}
|
||||
|
||||
/// Open the given `Cargo.toml` and parse it into a hashmap.
|
||||
fn open_cargo_toml(path: &Path) -> Result<Document, Error> {
|
||||
let content = fs::read_to_string(path).map_err(|e| Error::CouldNotRead {
|
||||
source: e,
|
||||
path: path.into(),
|
||||
})?;
|
||||
content
|
||||
.parse::<Document>()
|
||||
.map_err(|e| Error::InvalidToml { source: e })
|
||||
}
|
||||
|
||||
/// Extract all crate names from the given `Cargo.toml` by checking the `dependencies` and
|
||||
/// `dev-dependencies`.
|
||||
fn extract_crate_names(cargo_toml: &Document) -> Result<CrateNames, Error> {
|
||||
let package_name = extract_package_name(cargo_toml);
|
||||
let root_pkg = package_name.as_ref().map(|name| {
|
||||
let cr = match env::var_os("CARGO_TARGET_TMPDIR") {
|
||||
// We're running for a library/binary crate
|
||||
None => FoundCrate::Itself,
|
||||
// We're running for an integration test
|
||||
Some(_) => FoundCrate::Name(sanitize_crate_name(name)),
|
||||
};
|
||||
|
||||
(name.to_string(), cr)
|
||||
});
|
||||
|
||||
let dep_tables = dep_tables(cargo_toml).chain(target_dep_tables(cargo_toml));
|
||||
let dep_pkgs = dep_tables.flatten().filter_map(move |(dep_name, dep_value)| {
|
||||
let pkg_name = dep_value
|
||||
.get("package")
|
||||
.and_then(|i| i.as_str())
|
||||
.unwrap_or(dep_name);
|
||||
|
||||
if package_name.as_ref().map_or(false, |n| *n == pkg_name) {
|
||||
return None;
|
||||
}
|
||||
|
||||
let cr = FoundCrate::Name(sanitize_crate_name(dep_name));
|
||||
|
||||
Some((pkg_name.to_owned(), cr))
|
||||
});
|
||||
|
||||
Ok(root_pkg.into_iter().chain(dep_pkgs).collect())
|
||||
}
|
||||
|
||||
fn extract_package_name(cargo_toml: &Document) -> Option<&str> {
|
||||
cargo_toml.get("package")?.get("name")?.as_str()
|
||||
}
|
||||
|
||||
fn target_dep_tables(cargo_toml: &Document) -> impl Iterator<Item = &Table> {
|
||||
cargo_toml
|
||||
.get("target")
|
||||
.into_iter()
|
||||
.filter_map(Item::as_table)
|
||||
.flat_map(|t| {
|
||||
t.iter()
|
||||
.map(|(_, value)| value)
|
||||
.filter_map(Item::as_table)
|
||||
.flat_map(dep_tables)
|
||||
})
|
||||
}
|
||||
|
||||
fn dep_tables(table: &Table) -> impl Iterator<Item = &Table> {
|
||||
table
|
||||
.get("dependencies")
|
||||
.into_iter()
|
||||
.chain(table.get("dev-dependencies"))
|
||||
.filter_map(Item::as_table)
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
macro_rules! create_test {
|
||||
(
|
||||
$name:ident,
|
||||
$cargo_toml:expr,
|
||||
$( $result:tt )*
|
||||
) => {
|
||||
#[test]
|
||||
fn $name() {
|
||||
let cargo_toml = $cargo_toml.parse::<Document>().expect("Parses `Cargo.toml`");
|
||||
|
||||
match extract_crate_names(&cargo_toml).map(|mut map| map.remove("my_crate")) {
|
||||
$( $result )* => (),
|
||||
o => panic!("Invalid result: {:?}", o),
|
||||
}
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
create_test! {
|
||||
deps_with_crate,
|
||||
r#"
|
||||
[dependencies]
|
||||
my_crate = "0.1"
|
||||
"#,
|
||||
Ok(Some(FoundCrate::Name(name))) if name == "my_crate"
|
||||
}
|
||||
|
||||
create_test! {
|
||||
dev_deps_with_crate,
|
||||
r#"
|
||||
[dev-dependencies]
|
||||
my_crate = "0.1"
|
||||
"#,
|
||||
Ok(Some(FoundCrate::Name(name))) if name == "my_crate"
|
||||
}
|
||||
|
||||
create_test! {
|
||||
deps_with_crate_renamed,
|
||||
r#"
|
||||
[dependencies]
|
||||
cool = { package = "my_crate", version = "0.1" }
|
||||
"#,
|
||||
Ok(Some(FoundCrate::Name(name))) if name == "cool"
|
||||
}
|
||||
|
||||
create_test! {
|
||||
deps_with_crate_renamed_second,
|
||||
r#"
|
||||
[dependencies.cool]
|
||||
package = "my_crate"
|
||||
version = "0.1"
|
||||
"#,
|
||||
Ok(Some(FoundCrate::Name(name))) if name == "cool"
|
||||
}
|
||||
|
||||
create_test! {
|
||||
deps_empty,
|
||||
r#"
|
||||
[dependencies]
|
||||
"#,
|
||||
Ok(None)
|
||||
}
|
||||
|
||||
create_test! {
|
||||
crate_not_found,
|
||||
r#"
|
||||
[dependencies]
|
||||
serde = "1.0"
|
||||
"#,
|
||||
Ok(None)
|
||||
}
|
||||
|
||||
create_test! {
|
||||
target_dependency,
|
||||
r#"
|
||||
[target.'cfg(target_os="android")'.dependencies]
|
||||
my_crate = "0.1"
|
||||
"#,
|
||||
Ok(Some(FoundCrate::Name(name))) if name == "my_crate"
|
||||
}
|
||||
|
||||
create_test! {
|
||||
target_dependency2,
|
||||
r#"
|
||||
[target.x86_64-pc-windows-gnu.dependencies]
|
||||
my_crate = "0.1"
|
||||
"#,
|
||||
Ok(Some(FoundCrate::Name(name))) if name == "my_crate"
|
||||
}
|
||||
|
||||
create_test! {
|
||||
own_crate,
|
||||
r#"
|
||||
[package]
|
||||
name = "my_crate"
|
||||
"#,
|
||||
Ok(Some(FoundCrate::Itself))
|
||||
}
|
||||
|
||||
create_test! {
|
||||
own_crate_and_in_deps,
|
||||
r#"
|
||||
[package]
|
||||
name = "my_crate"
|
||||
|
||||
[dev-dependencies]
|
||||
my_crate = "0.1"
|
||||
"#,
|
||||
Ok(Some(FoundCrate::Itself))
|
||||
}
|
||||
|
||||
create_test! {
|
||||
multiple_times,
|
||||
r#"
|
||||
[dependencies]
|
||||
my_crate = { version = "0.5" }
|
||||
my-crate-old = { package = "my_crate", version = "0.1" }
|
||||
"#,
|
||||
Ok(Some(FoundCrate::Name(name))) if name == "my_crate_old"
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue