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Initial vendor packages

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Signed-off-by: Valentin Popov <valentin@popov.link>
This commit is contained in:
Valentin Popov
2024-01-08 01:21:28 +04:00
parent 5ecd8cf2cb
commit 1b6a04ca55
7309 changed files with 2160054 additions and 0 deletions
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69
vendor/autocfg/src/error.rs vendored Normal file
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use std::error;
use std::fmt;
use std::io;
use std::num;
use std::str;
/// A common error type for the `autocfg` crate.
#[derive(Debug)]
pub struct Error {
kind: ErrorKind,
}
impl error::Error for Error {
fn description(&self) -> &str {
"AutoCfg error"
}
fn cause(&self) -> Option<&error::Error> {
match self.kind {
ErrorKind::Io(ref e) => Some(e),
ErrorKind::Num(ref e) => Some(e),
ErrorKind::Utf8(ref e) => Some(e),
ErrorKind::Other(_) => None,
}
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
match self.kind {
ErrorKind::Io(ref e) => e.fmt(f),
ErrorKind::Num(ref e) => e.fmt(f),
ErrorKind::Utf8(ref e) => e.fmt(f),
ErrorKind::Other(s) => s.fmt(f),
}
}
}
#[derive(Debug)]
enum ErrorKind {
Io(io::Error),
Num(num::ParseIntError),
Utf8(str::Utf8Error),
Other(&'static str),
}
pub fn from_io(e: io::Error) -> Error {
Error {
kind: ErrorKind::Io(e),
}
}
pub fn from_num(e: num::ParseIntError) -> Error {
Error {
kind: ErrorKind::Num(e),
}
}
pub fn from_utf8(e: str::Utf8Error) -> Error {
Error {
kind: ErrorKind::Utf8(e),
}
}
pub fn from_str(s: &'static str) -> Error {
Error {
kind: ErrorKind::Other(s),
}
}

453
vendor/autocfg/src/lib.rs vendored Normal file
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//! A Rust library for build scripts to automatically configure code based on
//! compiler support. Code snippets are dynamically tested to see if the `rustc`
//! will accept them, rather than hard-coding specific version support.
//!
//!
//! ## Usage
//!
//! Add this to your `Cargo.toml`:
//!
//! ```toml
//! [build-dependencies]
//! autocfg = "1"
//! ```
//!
//! Then use it in your `build.rs` script to detect compiler features. For
//! example, to test for 128-bit integer support, it might look like:
//!
//! ```rust
//! extern crate autocfg;
//!
//! fn main() {
//! # // Normally, cargo will set `OUT_DIR` for build scripts.
//! # std::env::set_var("OUT_DIR", "target");
//! let ac = autocfg::new();
//! ac.emit_has_type("i128");
//!
//! // (optional) We don't need to rerun for anything external.
//! autocfg::rerun_path("build.rs");
//! }
//! ```
//!
//! If the type test succeeds, this will write a `cargo:rustc-cfg=has_i128` line
//! for Cargo, which translates to Rust arguments `--cfg has_i128`. Then in the
//! rest of your Rust code, you can add `#[cfg(has_i128)]` conditions on code that
//! should only be used when the compiler supports it.
//!
//! ## Caution
//!
//! Many of the probing methods of `AutoCfg` document the particular template they
//! use, **subject to change**. The inputs are not validated to make sure they are
//! semantically correct for their expected use, so it's _possible_ to escape and
//! inject something unintended. However, such abuse is unsupported and will not
//! be considered when making changes to the templates.
#![deny(missing_debug_implementations)]
#![deny(missing_docs)]
// allow future warnings that can't be fixed while keeping 1.0 compatibility
#![allow(unknown_lints)]
#![allow(bare_trait_objects)]
#![allow(ellipsis_inclusive_range_patterns)]
/// Local macro to avoid `std::try!`, deprecated in Rust 1.39.
macro_rules! try {
($result:expr) => {
match $result {
Ok(value) => value,
Err(error) => return Err(error),
}
};
}
use std::env;
use std::ffi::OsString;
use std::fs;
use std::io::{stderr, Write};
use std::path::{Path, PathBuf};
use std::process::{Command, Stdio};
#[allow(deprecated)]
use std::sync::atomic::ATOMIC_USIZE_INIT;
use std::sync::atomic::{AtomicUsize, Ordering};
mod error;
pub use error::Error;
mod version;
use version::Version;
#[cfg(test)]
mod tests;
/// Helper to detect compiler features for `cfg` output in build scripts.
#[derive(Clone, Debug)]
pub struct AutoCfg {
out_dir: PathBuf,
rustc: PathBuf,
rustc_version: Version,
target: Option<OsString>,
no_std: bool,
rustflags: Vec<String>,
}
/// Writes a config flag for rustc on standard out.
///
/// This looks like: `cargo:rustc-cfg=CFG`
///
/// Cargo will use this in arguments to rustc, like `--cfg CFG`.
pub fn emit(cfg: &str) {
println!("cargo:rustc-cfg={}", cfg);
}
/// Writes a line telling Cargo to rerun the build script if `path` changes.
///
/// This looks like: `cargo:rerun-if-changed=PATH`
///
/// This requires at least cargo 0.7.0, corresponding to rustc 1.6.0. Earlier
/// versions of cargo will simply ignore the directive.
pub fn rerun_path(path: &str) {
println!("cargo:rerun-if-changed={}", path);
}
/// Writes a line telling Cargo to rerun the build script if the environment
/// variable `var` changes.
///
/// This looks like: `cargo:rerun-if-env-changed=VAR`
///
/// This requires at least cargo 0.21.0, corresponding to rustc 1.20.0. Earlier
/// versions of cargo will simply ignore the directive.
pub fn rerun_env(var: &str) {
println!("cargo:rerun-if-env-changed={}", var);
}
/// Create a new `AutoCfg` instance.
///
/// # Panics
///
/// Panics if `AutoCfg::new()` returns an error.
pub fn new() -> AutoCfg {
AutoCfg::new().unwrap()
}
impl AutoCfg {
/// Create a new `AutoCfg` instance.
///
/// # Common errors
///
/// - `rustc` can't be executed, from `RUSTC` or in the `PATH`.
/// - The version output from `rustc` can't be parsed.
/// - `OUT_DIR` is not set in the environment, or is not a writable directory.
///
pub fn new() -> Result<Self, Error> {
match env::var_os("OUT_DIR") {
Some(d) => Self::with_dir(d),
None => Err(error::from_str("no OUT_DIR specified!")),
}
}
/// Create a new `AutoCfg` instance with the specified output directory.
///
/// # Common errors
///
/// - `rustc` can't be executed, from `RUSTC` or in the `PATH`.
/// - The version output from `rustc` can't be parsed.
/// - `dir` is not a writable directory.
///
pub fn with_dir<T: Into<PathBuf>>(dir: T) -> Result<Self, Error> {
let rustc = env::var_os("RUSTC").unwrap_or_else(|| "rustc".into());
let rustc: PathBuf = rustc.into();
let rustc_version = try!(Version::from_rustc(&rustc));
let target = env::var_os("TARGET");
// Sanity check the output directory
let dir = dir.into();
let meta = try!(fs::metadata(&dir).map_err(error::from_io));
if !meta.is_dir() || meta.permissions().readonly() {
return Err(error::from_str("output path is not a writable directory"));
}
let mut ac = AutoCfg {
rustflags: rustflags(&target, &dir),
out_dir: dir,
rustc: rustc,
rustc_version: rustc_version,
target: target,
no_std: false,
};
// Sanity check with and without `std`.
if !ac.probe("").unwrap_or(false) {
ac.no_std = true;
if !ac.probe("").unwrap_or(false) {
// Neither worked, so assume nothing...
ac.no_std = false;
let warning = b"warning: autocfg could not probe for `std`\n";
stderr().write_all(warning).ok();
}
}
Ok(ac)
}
/// Test whether the current `rustc` reports a version greater than
/// or equal to "`major`.`minor`".
pub fn probe_rustc_version(&self, major: usize, minor: usize) -> bool {
self.rustc_version >= Version::new(major, minor, 0)
}
/// Sets a `cfg` value of the form `rustc_major_minor`, like `rustc_1_29`,
/// if the current `rustc` is at least that version.
pub fn emit_rustc_version(&self, major: usize, minor: usize) {
if self.probe_rustc_version(major, minor) {
emit(&format!("rustc_{}_{}", major, minor));
}
}
fn probe<T: AsRef<[u8]>>(&self, code: T) -> Result<bool, Error> {
#[allow(deprecated)]
static ID: AtomicUsize = ATOMIC_USIZE_INIT;
let id = ID.fetch_add(1, Ordering::Relaxed);
let mut command = Command::new(&self.rustc);
command
.arg("--crate-name")
.arg(format!("probe{}", id))
.arg("--crate-type=lib")
.arg("--out-dir")
.arg(&self.out_dir)
.arg("--emit=llvm-ir");
if let Some(target) = self.target.as_ref() {
command.arg("--target").arg(target);
}
command.args(&self.rustflags);
command.arg("-").stdin(Stdio::piped());
let mut child = try!(command.spawn().map_err(error::from_io));
let mut stdin = child.stdin.take().expect("rustc stdin");
if self.no_std {
try!(stdin.write_all(b"#![no_std]\n").map_err(error::from_io));
}
try!(stdin.write_all(code.as_ref()).map_err(error::from_io));
drop(stdin);
let status = try!(child.wait().map_err(error::from_io));
Ok(status.success())
}
/// Tests whether the given sysroot crate can be used.
///
/// The test code is subject to change, but currently looks like:
///
/// ```ignore
/// extern crate CRATE as probe;
/// ```
pub fn probe_sysroot_crate(&self, name: &str) -> bool {
self.probe(format!("extern crate {} as probe;", name)) // `as _` wasn't stabilized until Rust 1.33
.unwrap_or(false)
}
/// Emits a config value `has_CRATE` if `probe_sysroot_crate` returns true.
pub fn emit_sysroot_crate(&self, name: &str) {
if self.probe_sysroot_crate(name) {
emit(&format!("has_{}", mangle(name)));
}
}
/// Tests whether the given path can be used.
///
/// The test code is subject to change, but currently looks like:
///
/// ```ignore
/// pub use PATH;
/// ```
pub fn probe_path(&self, path: &str) -> bool {
self.probe(format!("pub use {};", path)).unwrap_or(false)
}
/// Emits a config value `has_PATH` if `probe_path` returns true.
///
/// Any non-identifier characters in the `path` will be replaced with
/// `_` in the generated config value.
pub fn emit_has_path(&self, path: &str) {
if self.probe_path(path) {
emit(&format!("has_{}", mangle(path)));
}
}
/// Emits the given `cfg` value if `probe_path` returns true.
pub fn emit_path_cfg(&self, path: &str, cfg: &str) {
if self.probe_path(path) {
emit(cfg);
}
}
/// Tests whether the given trait can be used.
///
/// The test code is subject to change, but currently looks like:
///
/// ```ignore
/// pub trait Probe: TRAIT + Sized {}
/// ```
pub fn probe_trait(&self, name: &str) -> bool {
self.probe(format!("pub trait Probe: {} + Sized {{}}", name))
.unwrap_or(false)
}
/// Emits a config value `has_TRAIT` if `probe_trait` returns true.
///
/// Any non-identifier characters in the trait `name` will be replaced with
/// `_` in the generated config value.
pub fn emit_has_trait(&self, name: &str) {
if self.probe_trait(name) {
emit(&format!("has_{}", mangle(name)));
}
}
/// Emits the given `cfg` value if `probe_trait` returns true.
pub fn emit_trait_cfg(&self, name: &str, cfg: &str) {
if self.probe_trait(name) {
emit(cfg);
}
}
/// Tests whether the given type can be used.
///
/// The test code is subject to change, but currently looks like:
///
/// ```ignore
/// pub type Probe = TYPE;
/// ```
pub fn probe_type(&self, name: &str) -> bool {
self.probe(format!("pub type Probe = {};", name))
.unwrap_or(false)
}
/// Emits a config value `has_TYPE` if `probe_type` returns true.
///
/// Any non-identifier characters in the type `name` will be replaced with
/// `_` in the generated config value.
pub fn emit_has_type(&self, name: &str) {
if self.probe_type(name) {
emit(&format!("has_{}", mangle(name)));
}
}
/// Emits the given `cfg` value if `probe_type` returns true.
pub fn emit_type_cfg(&self, name: &str, cfg: &str) {
if self.probe_type(name) {
emit(cfg);
}
}
/// Tests whether the given expression can be used.
///
/// The test code is subject to change, but currently looks like:
///
/// ```ignore
/// pub fn probe() { let _ = EXPR; }
/// ```
pub fn probe_expression(&self, expr: &str) -> bool {
self.probe(format!("pub fn probe() {{ let _ = {}; }}", expr))
.unwrap_or(false)
}
/// Emits the given `cfg` value if `probe_expression` returns true.
pub fn emit_expression_cfg(&self, expr: &str, cfg: &str) {
if self.probe_expression(expr) {
emit(cfg);
}
}
/// Tests whether the given constant expression can be used.
///
/// The test code is subject to change, but currently looks like:
///
/// ```ignore
/// pub const PROBE: () = ((), EXPR).0;
/// ```
pub fn probe_constant(&self, expr: &str) -> bool {
self.probe(format!("pub const PROBE: () = ((), {}).0;", expr))
.unwrap_or(false)
}
/// Emits the given `cfg` value if `probe_constant` returns true.
pub fn emit_constant_cfg(&self, expr: &str, cfg: &str) {
if self.probe_constant(expr) {
emit(cfg);
}
}
}
fn mangle(s: &str) -> String {
s.chars()
.map(|c| match c {
'A'...'Z' | 'a'...'z' | '0'...'9' => c,
_ => '_',
})
.collect()
}
fn dir_contains_target(
target: &Option<OsString>,
dir: &Path,
cargo_target_dir: Option<OsString>,
) -> bool {
target
.as_ref()
.and_then(|target| {
dir.to_str().and_then(|dir| {
let mut cargo_target_dir = cargo_target_dir
.map(PathBuf::from)
.unwrap_or_else(|| PathBuf::from("target"));
cargo_target_dir.push(target);
cargo_target_dir
.to_str()
.map(|cargo_target_dir| dir.contains(&cargo_target_dir))
})
})
.unwrap_or(false)
}
fn rustflags(target: &Option<OsString>, dir: &Path) -> Vec<String> {
// Starting with rust-lang/cargo#9601, shipped in Rust 1.55, Cargo always sets
// CARGO_ENCODED_RUSTFLAGS for any host/target build script invocation. This
// includes any source of flags, whether from the environment, toml config, or
// whatever may come in the future. The value is either an empty string, or a
// list of arguments separated by the ASCII unit separator (US), 0x1f.
if let Ok(a) = env::var("CARGO_ENCODED_RUSTFLAGS") {
return if a.is_empty() {
Vec::new()
} else {
a.split('\x1f').map(str::to_string).collect()
};
}
// Otherwise, we have to take a more heuristic approach, and we don't
// support values from toml config at all.
//
// Cargo only applies RUSTFLAGS for building TARGET artifact in
// cross-compilation environment. Sadly, we don't have a way to detect
// when we're building HOST artifact in a cross-compilation environment,
// so for now we only apply RUSTFLAGS when cross-compiling an artifact.
//
// See https://github.com/cuviper/autocfg/pull/10#issuecomment-527575030.
if *target != env::var_os("HOST")
|| dir_contains_target(target, dir, env::var_os("CARGO_TARGET_DIR"))
{
if let Ok(rustflags) = env::var("RUSTFLAGS") {
// This is meant to match how cargo handles the RUSTFLAGS environment variable.
// See https://github.com/rust-lang/cargo/blob/69aea5b6f69add7c51cca939a79644080c0b0ba0/src/cargo/core/compiler/build_context/target_info.rs#L434-L441
return rustflags
.split(' ')
.map(str::trim)
.filter(|s| !s.is_empty())
.map(str::to_string)
.collect();
}
}
Vec::new()
}

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use super::AutoCfg;
use std::env;
use std::path::Path;
impl AutoCfg {
fn core_std(&self, path: &str) -> String {
let krate = if self.no_std { "core" } else { "std" };
format!("{}::{}", krate, path)
}
fn assert_std(&self, probe_result: bool) {
assert_eq!(!self.no_std, probe_result);
}
fn assert_min(&self, major: usize, minor: usize, probe_result: bool) {
assert_eq!(self.probe_rustc_version(major, minor), probe_result);
}
fn for_test() -> Result<Self, super::error::Error> {
match env::var_os("TESTS_TARGET_DIR") {
Some(d) => Self::with_dir(d),
None => Self::with_dir("target"),
}
}
}
#[test]
fn autocfg_version() {
let ac = AutoCfg::for_test().unwrap();
println!("version: {:?}", ac.rustc_version);
assert!(ac.probe_rustc_version(1, 0));
}
#[test]
fn version_cmp() {
use super::version::Version;
let v123 = Version::new(1, 2, 3);
assert!(Version::new(1, 0, 0) < v123);
assert!(Version::new(1, 2, 2) < v123);
assert!(Version::new(1, 2, 3) == v123);
assert!(Version::new(1, 2, 4) > v123);
assert!(Version::new(1, 10, 0) > v123);
assert!(Version::new(2, 0, 0) > v123);
}
#[test]
fn probe_add() {
let ac = AutoCfg::for_test().unwrap();
let add = ac.core_std("ops::Add");
let add_rhs = add.clone() + "<i32>";
let add_rhs_output = add.clone() + "<i32, Output = i32>";
let dyn_add_rhs_output = "dyn ".to_string() + &*add_rhs_output;
assert!(ac.probe_path(&add));
assert!(ac.probe_trait(&add));
assert!(ac.probe_trait(&add_rhs));
assert!(ac.probe_trait(&add_rhs_output));
ac.assert_min(1, 27, ac.probe_type(&dyn_add_rhs_output));
}
#[test]
fn probe_as_ref() {
let ac = AutoCfg::for_test().unwrap();
let as_ref = ac.core_std("convert::AsRef");
let as_ref_str = as_ref.clone() + "<str>";
let dyn_as_ref_str = "dyn ".to_string() + &*as_ref_str;
assert!(ac.probe_path(&as_ref));
assert!(ac.probe_trait(&as_ref_str));
assert!(ac.probe_type(&as_ref_str));
ac.assert_min(1, 27, ac.probe_type(&dyn_as_ref_str));
}
#[test]
fn probe_i128() {
let ac = AutoCfg::for_test().unwrap();
let i128_path = ac.core_std("i128");
ac.assert_min(1, 26, ac.probe_path(&i128_path));
ac.assert_min(1, 26, ac.probe_type("i128"));
}
#[test]
fn probe_sum() {
let ac = AutoCfg::for_test().unwrap();
let sum = ac.core_std("iter::Sum");
let sum_i32 = sum.clone() + "<i32>";
let dyn_sum_i32 = "dyn ".to_string() + &*sum_i32;
ac.assert_min(1, 12, ac.probe_path(&sum));
ac.assert_min(1, 12, ac.probe_trait(&sum));
ac.assert_min(1, 12, ac.probe_trait(&sum_i32));
ac.assert_min(1, 12, ac.probe_type(&sum_i32));
ac.assert_min(1, 27, ac.probe_type(&dyn_sum_i32));
}
#[test]
fn probe_std() {
let ac = AutoCfg::for_test().unwrap();
ac.assert_std(ac.probe_sysroot_crate("std"));
}
#[test]
fn probe_alloc() {
let ac = AutoCfg::for_test().unwrap();
ac.assert_min(1, 36, ac.probe_sysroot_crate("alloc"));
}
#[test]
fn probe_bad_sysroot_crate() {
let ac = AutoCfg::for_test().unwrap();
assert!(!ac.probe_sysroot_crate("doesnt_exist"));
}
#[test]
fn probe_no_std() {
let ac = AutoCfg::for_test().unwrap();
assert!(ac.probe_type("i32"));
assert!(ac.probe_type("[i32]"));
ac.assert_std(ac.probe_type("Vec<i32>"));
}
#[test]
fn probe_expression() {
let ac = AutoCfg::for_test().unwrap();
assert!(ac.probe_expression(r#""test".trim_left()"#));
ac.assert_min(1, 30, ac.probe_expression(r#""test".trim_start()"#));
ac.assert_std(ac.probe_expression("[1, 2, 3].to_vec()"));
}
#[test]
fn probe_constant() {
let ac = AutoCfg::for_test().unwrap();
assert!(ac.probe_constant("1 + 2 + 3"));
ac.assert_min(1, 33, ac.probe_constant("{ let x = 1 + 2 + 3; x * x }"));
ac.assert_min(1, 39, ac.probe_constant(r#""test".len()"#));
}
#[test]
fn dir_does_not_contain_target() {
assert!(!super::dir_contains_target(
&Some("x86_64-unknown-linux-gnu".into()),
Path::new("/project/target/debug/build/project-ea75983148559682/out"),
None,
));
}
#[test]
fn dir_does_contain_target() {
assert!(super::dir_contains_target(
&Some("x86_64-unknown-linux-gnu".into()),
Path::new(
"/project/target/x86_64-unknown-linux-gnu/debug/build/project-0147aca016480b9d/out"
),
None,
));
}
#[test]
fn dir_does_not_contain_target_with_custom_target_dir() {
assert!(!super::dir_contains_target(
&Some("x86_64-unknown-linux-gnu".into()),
Path::new("/project/custom/debug/build/project-ea75983148559682/out"),
Some("custom".into()),
));
}
#[test]
fn dir_does_contain_target_with_custom_target_dir() {
assert!(super::dir_contains_target(
&Some("x86_64-unknown-linux-gnu".into()),
Path::new(
"/project/custom/x86_64-unknown-linux-gnu/debug/build/project-0147aca016480b9d/out"
),
Some("custom".into()),
));
}

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use std::path::Path;
use std::process::Command;
use std::str;
use super::{error, Error};
/// A version structure for making relative comparisons.
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
pub struct Version {
major: usize,
minor: usize,
patch: usize,
}
impl Version {
/// Creates a `Version` instance for a specific `major.minor.patch` version.
pub fn new(major: usize, minor: usize, patch: usize) -> Self {
Version {
major: major,
minor: minor,
patch: patch,
}
}
pub fn from_rustc(rustc: &Path) -> Result<Self, Error> {
// Get rustc's verbose version
let output = try!(Command::new(rustc)
.args(&["--version", "--verbose"])
.output()
.map_err(error::from_io));
if !output.status.success() {
return Err(error::from_str("could not execute rustc"));
}
let output = try!(str::from_utf8(&output.stdout).map_err(error::from_utf8));
// Find the release line in the verbose version output.
let release = match output.lines().find(|line| line.starts_with("release: ")) {
Some(line) => &line["release: ".len()..],
None => return Err(error::from_str("could not find rustc release")),
};
// Strip off any extra channel info, e.g. "-beta.N", "-nightly"
let version = match release.find('-') {
Some(i) => &release[..i],
None => release,
};
// Split the version into semver components.
let mut iter = version.splitn(3, '.');
let major = try!(iter.next().ok_or(error::from_str("missing major version")));
let minor = try!(iter.next().ok_or(error::from_str("missing minor version")));
let patch = try!(iter.next().ok_or(error::from_str("missing patch version")));
Ok(Version::new(
try!(major.parse().map_err(error::from_num)),
try!(minor.parse().map_err(error::from_num)),
try!(patch.parse().map_err(error::from_num)),
))
}
}