autocfg-1.1.0/.cargo_vcs_info.json0000644000000001360000000000100124630ustar { "git": { "sha1": "2dc4819c4a3d8856a1876dae546d1b082ea550f3" }, "path_in_vcs": "" }autocfg-1.1.0/.gitignore000064400000000000000000000000370072674642500132730ustar 00000000000000 /target **/*.rs.bk Cargo.lock autocfg-1.1.0/Cargo.lock0000644000000002270000000000100104370ustar # This file is automatically @generated by Cargo. # It is not intended for manual editing. version = 3 [[package]] name = "autocfg" version = "1.1.0" autocfg-1.1.0/Cargo.toml0000644000000015350000000000100104650ustar # 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. [package] name = "autocfg" version = "1.1.0" authors = ["Josh Stone "] exclude = ["/.github/**", "/bors.toml"] description = "Automatic cfg for Rust compiler features" readme = "README.md" keywords = ["rustc", "build", "autoconf"] categories = ["development-tools::build-utils"] license = "Apache-2.0 OR MIT" repository = "https://github.com/cuviper/autocfg" [dependencies] autocfg-1.1.0/Cargo.toml.orig000064400000000000000000000006120072674642500141710ustar 00000000000000[package] name = "autocfg" version = "1.1.0" authors = ["Josh Stone "] license = "Apache-2.0 OR MIT" repository = "https://github.com/cuviper/autocfg" description = "Automatic cfg for Rust compiler features" readme = "README.md" keywords = ["rustc", "build", "autoconf"] categories = ["development-tools::build-utils"] exclude = ["/.github/**", "/bors.toml"] [dependencies] autocfg-1.1.0/LICENSE-APACHE000064400000000000000000000251370072674642500132370ustar 00000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. 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See the License for the specific language governing permissions and limitations under the License. autocfg-1.1.0/LICENSE-MIT000064400000000000000000000020360072674642500127400ustar 00000000000000Copyright (c) 2018 Josh Stone Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. autocfg-1.1.0/README.md000064400000000000000000000056020072674642500125650ustar 00000000000000autocfg ======= [![autocfg crate](https://img.shields.io/crates/v/autocfg.svg)](https://crates.io/crates/autocfg) [![autocfg documentation](https://docs.rs/autocfg/badge.svg)](https://docs.rs/autocfg) ![minimum rustc 1.0](https://img.shields.io/badge/rustc-1.0+-red.svg) ![build status](https://github.com/cuviper/autocfg/workflows/master/badge.svg) 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() { 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. ## Release Notes - 1.1.0 (2022-02-07) - Use `CARGO_ENCODED_RUSTFLAGS` when it is set. - 1.0.1 (2020-08-20) - Apply `RUSTFLAGS` for more `--target` scenarios, by @adamreichold. - 1.0.0 (2020-01-08) - 🎉 Release 1.0! 🎉 (no breaking changes) - Add `probe_expression` and `emit_expression_cfg` to test arbitrary expressions. - Add `probe_constant` and `emit_constant_cfg` to test arbitrary constant expressions. - 0.1.7 (2019-10-20) - Apply `RUSTFLAGS` when probing `$TARGET != $HOST`, mainly for sysroot, by @roblabla. - 0.1.6 (2019-08-19) - Add `probe`/`emit_sysroot_crate`, by @leo60228. - 0.1.5 (2019-07-16) - Mask some warnings from newer rustc. - 0.1.4 (2019-05-22) - Relax `std`/`no_std` probing to a warning instead of an error. - Improve `rustc` bootstrap compatibility. - 0.1.3 (2019-05-21) - Auto-detects if `#![no_std]` is needed for the `$TARGET`. - 0.1.2 (2019-01-16) - Add `rerun_env(ENV)` to print `cargo:rerun-if-env-changed=ENV`. - Add `rerun_path(PATH)` to print `cargo:rerun-if-changed=PATH`. ## Minimum Rust version policy This crate's minimum supported `rustc` version is `1.0.0`. Compatibility is its entire reason for existence, so this crate will be extremely conservative about raising this requirement. If this is ever deemed necessary, it will be treated as a major breaking change for semver purposes. ## License This project is licensed under either of * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0) * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT) at your option. autocfg-1.1.0/examples/integers.rs000064400000000000000000000003530072674642500153100ustar 00000000000000extern crate autocfg; fn main() { // Normally, cargo will set `OUT_DIR` for build scripts. let ac = autocfg::AutoCfg::with_dir("target").unwrap(); for i in 3..8 { ac.emit_has_type(&format!("i{}", 1 << i)); } } autocfg-1.1.0/examples/paths.rs000064400000000000000000000012400072674642500146030ustar 00000000000000extern crate autocfg; fn main() { // Normally, cargo will set `OUT_DIR` for build scripts. let ac = autocfg::AutoCfg::with_dir("target").unwrap(); // since ancient times... ac.emit_has_path("std::vec::Vec"); ac.emit_path_cfg("std::vec::Vec", "has_vec"); // rustc 1.10.0 ac.emit_has_path("std::panic::PanicInfo"); ac.emit_path_cfg("std::panic::PanicInfo", "has_panic_info"); // rustc 1.20.0 ac.emit_has_path("std::mem::ManuallyDrop"); ac.emit_path_cfg("std::mem::ManuallyDrop", "has_manually_drop"); // rustc 1.25.0 ac.emit_has_path("std::ptr::NonNull"); ac.emit_path_cfg("std::ptr::NonNull", "has_non_null"); } autocfg-1.1.0/examples/traits.rs000064400000000000000000000014720072674642500150010ustar 00000000000000extern crate autocfg; fn main() { // Normally, cargo will set `OUT_DIR` for build scripts. let ac = autocfg::AutoCfg::with_dir("target").unwrap(); // since ancient times... ac.emit_has_trait("std::ops::Add"); ac.emit_trait_cfg("std::ops::Add", "has_ops"); // trait parameters have to be provided ac.emit_has_trait("std::borrow::Borrow"); ac.emit_trait_cfg("std::borrow::Borrow", "has_borrow"); // rustc 1.8.0 ac.emit_has_trait("std::ops::AddAssign"); ac.emit_trait_cfg("std::ops::AddAssign", "has_assign_ops"); // rustc 1.12.0 ac.emit_has_trait("std::iter::Sum"); ac.emit_trait_cfg("std::iter::Sum", "has_sum"); // rustc 1.28.0 ac.emit_has_trait("std::alloc::GlobalAlloc"); ac.emit_trait_cfg("std::alloc::GlobalAlloc", "has_global_alloc"); } autocfg-1.1.0/examples/versions.rs000064400000000000000000000003370072674642500153420ustar 00000000000000extern crate autocfg; fn main() { // Normally, cargo will set `OUT_DIR` for build scripts. let ac = autocfg::AutoCfg::with_dir("target").unwrap(); for i in 0..100 { ac.emit_rustc_version(1, i); } } autocfg-1.1.0/src/error.rs000064400000000000000000000026060072674642500135750ustar 00000000000000use 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), } } autocfg-1.1.0/src/lib.rs000064400000000000000000000347370072674642500132240ustar 00000000000000//! 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, no_std: bool, rustflags: Vec, } /// 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 { 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>(dir: T) -> Result { 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>(&self, code: T) -> Result { #[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, dir: &Path, cargo_target_dir: Option, ) -> 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, dir: &Path) -> Vec { // 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() } autocfg-1.1.0/src/tests.rs000064400000000000000000000116560072674642500136130ustar 00000000000000use 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 { 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() + ""; let add_rhs_output = add.clone() + ""; 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() + ""; 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() + ""; 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")); } #[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()), )); } autocfg-1.1.0/src/version.rs000064400000000000000000000040540072674642500141300ustar 00000000000000use 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 { // 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)), )) } } autocfg-1.1.0/tests/rustflags.rs000064400000000000000000000022400072674642500150230ustar 00000000000000extern crate autocfg; use std::env; /// Tests that autocfg uses the RUSTFLAGS or CARGO_ENCODED_RUSTFLAGS /// environment variables when running rustc. #[test] fn test_with_sysroot() { // Use the same path as this test binary. let dir = env::current_exe().unwrap().parent().unwrap().to_path_buf(); env::set_var("OUT_DIR", &format!("{}", dir.display())); // If we have encoded rustflags, they take precedence, even if empty. env::set_var("CARGO_ENCODED_RUSTFLAGS", ""); env::set_var("RUSTFLAGS", &format!("-L {}", dir.display())); let ac = autocfg::AutoCfg::new().unwrap(); assert!(ac.probe_sysroot_crate("std")); assert!(!ac.probe_sysroot_crate("autocfg")); // Now try again with useful encoded args. env::set_var( "CARGO_ENCODED_RUSTFLAGS", &format!("-L\x1f{}", dir.display()), ); let ac = autocfg::AutoCfg::new().unwrap(); assert!(ac.probe_sysroot_crate("autocfg")); // Try the old-style RUSTFLAGS, ensuring HOST != TARGET. env::remove_var("CARGO_ENCODED_RUSTFLAGS"); env::set_var("HOST", "lol"); let ac = autocfg::AutoCfg::new().unwrap(); assert!(ac.probe_sysroot_crate("autocfg")); }