diff options
Diffstat (limited to 'third_party/rust/cargo-platform')
| -rw-r--r-- | third_party/rust/cargo-platform/.cargo-checksum.json | 1 | ||||
| -rw-r--r-- | third_party/rust/cargo-platform/Cargo.lock | 65 | ||||
| -rw-r--r-- | third_party/rust/cargo-platform/Cargo.toml | 24 | ||||
| -rw-r--r-- | third_party/rust/cargo-platform/LICENSE-APACHE | 201 | ||||
| -rw-r--r-- | third_party/rust/cargo-platform/LICENSE-MIT | 23 | ||||
| -rw-r--r-- | third_party/rust/cargo-platform/examples/matches.rs | 55 | ||||
| -rw-r--r-- | third_party/rust/cargo-platform/src/cfg.rs | 319 | ||||
| -rw-r--r-- | third_party/rust/cargo-platform/src/error.rs | 67 | ||||
| -rw-r--r-- | third_party/rust/cargo-platform/src/lib.rs | 146 | ||||
| -rw-r--r-- | third_party/rust/cargo-platform/tests/test_cfg.rs | 251 |
10 files changed, 1152 insertions, 0 deletions
diff --git a/third_party/rust/cargo-platform/.cargo-checksum.json b/third_party/rust/cargo-platform/.cargo-checksum.json new file mode 100644 index 0000000000..2b06d73774 --- /dev/null +++ b/third_party/rust/cargo-platform/.cargo-checksum.json @@ -0,0 +1 @@ +{"files":{"Cargo.lock":"9832d7e589baf011943280a694337d220581b600e089793f9935c8e3c34c36c2","Cargo.toml":"7e05573b44b23a026995d557ea85957fa19f437328a116be1ada5400274fe42e","LICENSE-APACHE":"8ada45cd9f843acf64e4722ae262c622a2b3b3007c7310ef36ac1061a30f6adb","LICENSE-MIT":"23f18e03dc49df91622fe2a76176497404e46ced8a715d9d2b67a7446571cca3","examples/matches.rs":"5485312cf426b1de01ef3d37cbbc7358d264e62509fa101614ecb44835b98229","src/cfg.rs":"2a5943f53d364c12edc0279db9f4c623add6d65b1a7b70843d8786e5d93d90ba","src/error.rs":"f9e5b3833ebd98ba5f959da34644a1a02687b6d896f94462ff43c05594bad467","src/lib.rs":"1c1ce4eb0143744427a01600541d3a852506922c4d3c558be29d8ce821516711","tests/test_cfg.rs":"d97202ea588e86b4c5603f199afbd7715852ddd8ddad772217a0826c9afd7304"},"package":"cbdb825da8a5df079a43676dbe042702f1707b1109f713a01420fbb4cc71fa27"}
\ No newline at end of file diff --git a/third_party/rust/cargo-platform/Cargo.lock b/third_party/rust/cargo-platform/Cargo.lock new file mode 100644 index 0000000000..059f730297 --- /dev/null +++ b/third_party/rust/cargo-platform/Cargo.lock @@ -0,0 +1,65 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 3 + +[[package]] +name = "cargo-platform" +version = "0.1.2" +dependencies = [ + "serde", +] + +[[package]] +name = "proc-macro2" +version = "1.0.28" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "5c7ed8b8c7b886ea3ed7dde405212185f423ab44682667c8c6dd14aa1d9f6612" +dependencies = [ + "unicode-xid", +] + +[[package]] +name = "quote" +version = "1.0.9" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "c3d0b9745dc2debf507c8422de05d7226cc1f0644216dfdfead988f9b1ab32a7" +dependencies = [ + "proc-macro2", +] + +[[package]] +name = "serde" +version = "1.0.127" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f03b9878abf6d14e6779d3f24f07b2cfa90352cfec4acc5aab8f1ac7f146fae8" +dependencies = [ + "serde_derive", +] + +[[package]] +name = "serde_derive" +version = "1.0.127" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "a024926d3432516606328597e0f224a51355a493b49fdd67e9209187cbe55ecc" +dependencies = [ + "proc-macro2", + "quote", + "syn", +] + +[[package]] +name = "syn" +version = "1.0.74" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "1873d832550d4588c3dbc20f01361ab00bfe741048f71e3fecf145a7cc18b29c" +dependencies = [ + "proc-macro2", + "quote", + "unicode-xid", +] + +[[package]] +name = "unicode-xid" +version = "0.2.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3" diff --git a/third_party/rust/cargo-platform/Cargo.toml b/third_party/rust/cargo-platform/Cargo.toml new file mode 100644 index 0000000000..ebf12c855e --- /dev/null +++ b/third_party/rust/cargo-platform/Cargo.toml @@ -0,0 +1,24 @@ +# 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] +edition = "2018" +name = "cargo-platform" +version = "0.1.2" +authors = ["The Cargo Project Developers"] +description = "Cargo's representation of a target platform." +homepage = "https://github.com/rust-lang/cargo" +documentation = "https://docs.rs/cargo-platform" +license = "MIT OR Apache-2.0" +repository = "https://github.com/rust-lang/cargo" +[dependencies.serde] +version = "1.0.82" +features = ["derive"] diff --git a/third_party/rust/cargo-platform/LICENSE-APACHE b/third_party/rust/cargo-platform/LICENSE-APACHE new file mode 100644 index 0000000000..c98d27d4f3 --- /dev/null +++ b/third_party/rust/cargo-platform/LICENSE-APACHE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + https://www.apache.org/licenses/LICENSE-2.0 + +TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + +1. 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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. diff --git a/third_party/rust/cargo-platform/examples/matches.rs b/third_party/rust/cargo-platform/examples/matches.rs new file mode 100644 index 0000000000..9ad5d10dd5 --- /dev/null +++ b/third_party/rust/cargo-platform/examples/matches.rs @@ -0,0 +1,55 @@ +//! This example demonstrates how to filter a Platform based on the current +//! host target. + +use cargo_platform::{Cfg, Platform}; +use std::process::Command; +use std::str::FromStr; + +static EXAMPLES: &[&str] = &[ + "cfg(windows)", + "cfg(unix)", + "cfg(target_os=\"macos\")", + "cfg(target_os=\"linux\")", + "cfg(any(target_arch=\"x86\", target_arch=\"x86_64\"))", +]; + +fn main() { + let target = get_target(); + let cfgs = get_cfgs(); + println!("host target={} cfgs:", target); + for cfg in &cfgs { + println!(" {}", cfg); + } + let mut examples: Vec<&str> = EXAMPLES.iter().copied().collect(); + examples.push(target.as_str()); + for example in examples { + let p = Platform::from_str(example).unwrap(); + println!("{:?} matches: {:?}", example, p.matches(&target, &cfgs)); + } +} + +fn get_target() -> String { + let output = Command::new("rustc") + .arg("-Vv") + .output() + .expect("rustc failed to run"); + let stdout = String::from_utf8(output.stdout).unwrap(); + for line in stdout.lines() { + if line.starts_with("host: ") { + return String::from(&line[6..]); + } + } + panic!("Failed to find host: {}", stdout); +} + +fn get_cfgs() -> Vec<Cfg> { + let output = Command::new("rustc") + .arg("--print=cfg") + .output() + .expect("rustc failed to run"); + let stdout = String::from_utf8(output.stdout).unwrap(); + stdout + .lines() + .map(|line| Cfg::from_str(line).unwrap()) + .collect() +} diff --git a/third_party/rust/cargo-platform/src/cfg.rs b/third_party/rust/cargo-platform/src/cfg.rs new file mode 100644 index 0000000000..c3ddb69bc8 --- /dev/null +++ b/third_party/rust/cargo-platform/src/cfg.rs @@ -0,0 +1,319 @@ +use crate::error::{ParseError, ParseErrorKind::*}; +use std::fmt; +use std::iter; +use std::str::{self, FromStr}; + +/// A cfg expression. +#[derive(Eq, PartialEq, Hash, Ord, PartialOrd, Clone, Debug)] +pub enum CfgExpr { + Not(Box<CfgExpr>), + All(Vec<CfgExpr>), + Any(Vec<CfgExpr>), + Value(Cfg), +} + +/// A cfg value. +#[derive(Eq, PartialEq, Hash, Ord, PartialOrd, Clone, Debug)] +pub enum Cfg { + /// A named cfg value, like `unix`. + Name(String), + /// A key/value cfg pair, like `target_os = "linux"`. + KeyPair(String, String), +} + +#[derive(PartialEq)] +enum Token<'a> { + LeftParen, + RightParen, + Ident(&'a str), + Comma, + Equals, + String(&'a str), +} + +#[derive(Clone)] +struct Tokenizer<'a> { + s: iter::Peekable<str::CharIndices<'a>>, + orig: &'a str, +} + +struct Parser<'a> { + t: Tokenizer<'a>, +} + +impl FromStr for Cfg { + type Err = ParseError; + + fn from_str(s: &str) -> Result<Cfg, Self::Err> { + let mut p = Parser::new(s); + let e = p.cfg()?; + if let Some(rest) = p.rest() { + return Err(ParseError::new( + p.t.orig, + UnterminatedExpression(rest.to_string()), + )); + } + Ok(e) + } +} + +impl fmt::Display for Cfg { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match *self { + Cfg::Name(ref s) => s.fmt(f), + Cfg::KeyPair(ref k, ref v) => write!(f, "{} = \"{}\"", k, v), + } + } +} + +impl CfgExpr { + /// Utility function to check if the key, "cfg(..)" matches the `target_cfg` + pub fn matches_key(key: &str, target_cfg: &[Cfg]) -> bool { + if key.starts_with("cfg(") && key.ends_with(')') { + let cfg = &key[4..key.len() - 1]; + + CfgExpr::from_str(cfg) + .ok() + .map(|ce| ce.matches(target_cfg)) + .unwrap_or(false) + } else { + false + } + } + + pub fn matches(&self, cfg: &[Cfg]) -> bool { + match *self { + CfgExpr::Not(ref e) => !e.matches(cfg), + CfgExpr::All(ref e) => e.iter().all(|e| e.matches(cfg)), + CfgExpr::Any(ref e) => e.iter().any(|e| e.matches(cfg)), + CfgExpr::Value(ref e) => cfg.contains(e), + } + } +} + +impl FromStr for CfgExpr { + type Err = ParseError; + + fn from_str(s: &str) -> Result<CfgExpr, Self::Err> { + let mut p = Parser::new(s); + let e = p.expr()?; + if let Some(rest) = p.rest() { + return Err(ParseError::new( + p.t.orig, + UnterminatedExpression(rest.to_string()), + )); + } + Ok(e) + } +} + +impl fmt::Display for CfgExpr { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match *self { + CfgExpr::Not(ref e) => write!(f, "not({})", e), + CfgExpr::All(ref e) => write!(f, "all({})", CommaSep(e)), + CfgExpr::Any(ref e) => write!(f, "any({})", CommaSep(e)), + CfgExpr::Value(ref e) => write!(f, "{}", e), + } + } +} + +struct CommaSep<'a, T>(&'a [T]); + +impl<'a, T: fmt::Display> fmt::Display for CommaSep<'a, T> { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + for (i, v) in self.0.iter().enumerate() { + if i > 0 { + write!(f, ", ")?; + } + write!(f, "{}", v)?; + } + Ok(()) + } +} + +impl<'a> Parser<'a> { + fn new(s: &'a str) -> Parser<'a> { + Parser { + t: Tokenizer { + s: s.char_indices().peekable(), + orig: s, + }, + } + } + + fn expr(&mut self) -> Result<CfgExpr, ParseError> { + match self.peek() { + Some(Ok(Token::Ident(op @ "all"))) | Some(Ok(Token::Ident(op @ "any"))) => { + self.t.next(); + let mut e = Vec::new(); + self.eat(&Token::LeftParen)?; + while !self.r#try(&Token::RightParen) { + e.push(self.expr()?); + if !self.r#try(&Token::Comma) { + self.eat(&Token::RightParen)?; + break; + } + } + if op == "all" { + Ok(CfgExpr::All(e)) + } else { + Ok(CfgExpr::Any(e)) + } + } + Some(Ok(Token::Ident("not"))) => { + self.t.next(); + self.eat(&Token::LeftParen)?; + let e = self.expr()?; + self.eat(&Token::RightParen)?; + Ok(CfgExpr::Not(Box::new(e))) + } + Some(Ok(..)) => self.cfg().map(CfgExpr::Value), + Some(Err(..)) => Err(self.t.next().unwrap().err().unwrap()), + None => Err(ParseError::new( + self.t.orig, + IncompleteExpr("start of a cfg expression"), + )), + } + } + + fn cfg(&mut self) -> Result<Cfg, ParseError> { + match self.t.next() { + Some(Ok(Token::Ident(name))) => { + let e = if self.r#try(&Token::Equals) { + let val = match self.t.next() { + Some(Ok(Token::String(s))) => s, + Some(Ok(t)) => { + return Err(ParseError::new( + self.t.orig, + UnexpectedToken { + expected: "a string", + found: t.classify(), + }, + )) + } + Some(Err(e)) => return Err(e), + None => { + return Err(ParseError::new(self.t.orig, IncompleteExpr("a string"))) + } + }; + Cfg::KeyPair(name.to_string(), val.to_string()) + } else { + Cfg::Name(name.to_string()) + }; + Ok(e) + } + Some(Ok(t)) => Err(ParseError::new( + self.t.orig, + UnexpectedToken { + expected: "identifier", + found: t.classify(), + }, + )), + Some(Err(e)) => Err(e), + None => Err(ParseError::new(self.t.orig, IncompleteExpr("identifier"))), + } + } + + fn peek(&mut self) -> Option<Result<Token<'a>, ParseError>> { + self.t.clone().next() + } + + fn r#try(&mut self, token: &Token<'a>) -> bool { + match self.peek() { + Some(Ok(ref t)) if token == t => {} + _ => return false, + } + self.t.next(); + true + } + + fn eat(&mut self, token: &Token<'a>) -> Result<(), ParseError> { + match self.t.next() { + Some(Ok(ref t)) if token == t => Ok(()), + Some(Ok(t)) => Err(ParseError::new( + self.t.orig, + UnexpectedToken { + expected: token.classify(), + found: t.classify(), + }, + )), + Some(Err(e)) => Err(e), + None => Err(ParseError::new( + self.t.orig, + IncompleteExpr(token.classify()), + )), + } + } + + /// Returns the rest of the input from the current location. + fn rest(&self) -> Option<&str> { + let mut s = self.t.s.clone(); + loop { + match s.next() { + Some((_, ' ')) => {} + Some((start, _ch)) => return Some(&self.t.orig[start..]), + None => return None, + } + } + } +} + +impl<'a> Iterator for Tokenizer<'a> { + type Item = Result<Token<'a>, ParseError>; + + fn next(&mut self) -> Option<Result<Token<'a>, ParseError>> { + loop { + match self.s.next() { + Some((_, ' ')) => {} + Some((_, '(')) => return Some(Ok(Token::LeftParen)), + Some((_, ')')) => return Some(Ok(Token::RightParen)), + Some((_, ',')) => return Some(Ok(Token::Comma)), + Some((_, '=')) => return Some(Ok(Token::Equals)), + Some((start, '"')) => { + while let Some((end, ch)) = self.s.next() { + if ch == '"' { + return Some(Ok(Token::String(&self.orig[start + 1..end]))); + } + } + return Some(Err(ParseError::new(self.orig, UnterminatedString))); + } + Some((start, ch)) if is_ident_start(ch) => { + while let Some(&(end, ch)) = self.s.peek() { + if !is_ident_rest(ch) { + return Some(Ok(Token::Ident(&self.orig[start..end]))); + } else { + self.s.next(); + } + } + return Some(Ok(Token::Ident(&self.orig[start..]))); + } + Some((_, ch)) => { + return Some(Err(ParseError::new(self.orig, UnexpectedChar(ch)))); + } + None => return None, + } + } + } +} + +fn is_ident_start(ch: char) -> bool { + ch == '_' || ch.is_ascii_alphabetic() +} + +fn is_ident_rest(ch: char) -> bool { + is_ident_start(ch) || ch.is_ascii_digit() +} + +impl<'a> Token<'a> { + fn classify(&self) -> &'static str { + match *self { + Token::LeftParen => "`(`", + Token::RightParen => "`)`", + Token::Ident(..) => "an identifier", + Token::Comma => "`,`", + Token::Equals => "`=`", + Token::String(..) => "a string", + } + } +} diff --git a/third_party/rust/cargo-platform/src/error.rs b/third_party/rust/cargo-platform/src/error.rs new file mode 100644 index 0000000000..bf4b35f271 --- /dev/null +++ b/third_party/rust/cargo-platform/src/error.rs @@ -0,0 +1,67 @@ +use std::fmt; + +#[derive(Debug)] +pub struct ParseError { + kind: ParseErrorKind, + orig: String, +} + +#[non_exhaustive] +#[derive(Debug)] +pub enum ParseErrorKind { + UnterminatedString, + UnexpectedChar(char), + UnexpectedToken { + expected: &'static str, + found: &'static str, + }, + IncompleteExpr(&'static str), + UnterminatedExpression(String), + InvalidTarget(String), +} + +impl fmt::Display for ParseError { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + write!( + f, + "failed to parse `{}` as a cfg expression: {}", + self.orig, self.kind + ) + } +} + +impl fmt::Display for ParseErrorKind { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + use ParseErrorKind::*; + match self { + UnterminatedString => write!(f, "unterminated string in cfg"), + UnexpectedChar(ch) => write!( + f, + "unexpected character `{}` in cfg, expected parens, a comma, \ + an identifier, or a string", + ch + ), + UnexpectedToken { expected, found } => { + write!(f, "expected {}, found {}", expected, found) + } + IncompleteExpr(expected) => { + write!(f, "expected {}, but cfg expression ended", expected) + } + UnterminatedExpression(s) => { + write!(f, "unexpected content `{}` found after cfg expression", s) + } + InvalidTarget(s) => write!(f, "invalid target specifier: {}", s), + } + } +} + +impl std::error::Error for ParseError {} + +impl ParseError { + pub fn new(orig: &str, kind: ParseErrorKind) -> ParseError { + ParseError { + kind, + orig: orig.to_string(), + } + } +} diff --git a/third_party/rust/cargo-platform/src/lib.rs b/third_party/rust/cargo-platform/src/lib.rs new file mode 100644 index 0000000000..0a3dcf1af1 --- /dev/null +++ b/third_party/rust/cargo-platform/src/lib.rs @@ -0,0 +1,146 @@ +//! Platform definition used by Cargo. +//! +//! This defines a [`Platform`] type which is used in Cargo to specify a target platform. +//! There are two kinds, a named target like `x86_64-apple-darwin`, and a "cfg expression" +//! like `cfg(any(target_os = "macos", target_os = "ios"))`. +//! +//! See `examples/matches.rs` for an example of how to match against a `Platform`. +//! +//! [`Platform`]: enum.Platform.html + +use std::fmt; +use std::str::FromStr; + +mod cfg; +mod error; + +pub use cfg::{Cfg, CfgExpr}; +pub use error::{ParseError, ParseErrorKind}; + +/// Platform definition. +#[derive(Eq, PartialEq, Hash, Ord, PartialOrd, Clone, Debug)] +pub enum Platform { + /// A named platform, like `x86_64-apple-darwin`. + Name(String), + /// A cfg expression, like `cfg(windows)`. + Cfg(CfgExpr), +} + +impl Platform { + /// Returns whether the Platform matches the given target and cfg. + /// + /// The named target and cfg values should be obtained from `rustc`. + pub fn matches(&self, name: &str, cfg: &[Cfg]) -> bool { + match *self { + Platform::Name(ref p) => p == name, + Platform::Cfg(ref p) => p.matches(cfg), + } + } + + fn validate_named_platform(name: &str) -> Result<(), ParseError> { + if let Some(ch) = name + .chars() + .find(|&c| !(c.is_alphanumeric() || c == '_' || c == '-' || c == '.')) + { + if name.chars().any(|c| c == '(') { + return Err(ParseError::new( + name, + ParseErrorKind::InvalidTarget( + "unexpected `(` character, cfg expressions must start with `cfg(`" + .to_string(), + ), + )); + } + return Err(ParseError::new( + name, + ParseErrorKind::InvalidTarget(format!( + "unexpected character {} in target name", + ch + )), + )); + } + Ok(()) + } + + pub fn check_cfg_attributes(&self, warnings: &mut Vec<String>) { + fn check_cfg_expr(expr: &CfgExpr, warnings: &mut Vec<String>) { + match *expr { + CfgExpr::Not(ref e) => check_cfg_expr(e, warnings), + CfgExpr::All(ref e) | CfgExpr::Any(ref e) => { + for e in e { + check_cfg_expr(e, warnings); + } + } + CfgExpr::Value(ref e) => match e { + Cfg::Name(name) => match name.as_str() { + "test" | "debug_assertions" | "proc_macro" => + warnings.push(format!( + "Found `{}` in `target.'cfg(...)'.dependencies`. \ + This value is not supported for selecting dependencies \ + and will not work as expected. \ + To learn more visit \ + https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#platform-specific-dependencies", + name + )), + _ => (), + }, + Cfg::KeyPair(name, _) => if name.as_str() == "feature" { + warnings.push(String::from( + "Found `feature = ...` in `target.'cfg(...)'.dependencies`. \ + This key is not supported for selecting dependencies \ + and will not work as expected. \ + Use the [features] section instead: \ + https://doc.rust-lang.org/cargo/reference/features.html" + )) + }, + } + } + } + + if let Platform::Cfg(cfg) = self { + check_cfg_expr(cfg, warnings); + } + } +} + +impl serde::Serialize for Platform { + fn serialize<S>(&self, s: S) -> Result<S::Ok, S::Error> + where + S: serde::Serializer, + { + self.to_string().serialize(s) + } +} + +impl<'de> serde::Deserialize<'de> for Platform { + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: serde::Deserializer<'de>, + { + let s = String::deserialize(deserializer)?; + FromStr::from_str(&s).map_err(serde::de::Error::custom) + } +} + +impl FromStr for Platform { + type Err = ParseError; + + fn from_str(s: &str) -> Result<Platform, ParseError> { + if s.starts_with("cfg(") && s.ends_with(')') { + let s = &s[4..s.len() - 1]; + s.parse().map(Platform::Cfg) + } else { + Platform::validate_named_platform(s)?; + Ok(Platform::Name(s.to_string())) + } + } +} + +impl fmt::Display for Platform { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match *self { + Platform::Name(ref n) => n.fmt(f), + Platform::Cfg(ref e) => write!(f, "cfg({})", e), + } + } +} diff --git a/third_party/rust/cargo-platform/tests/test_cfg.rs b/third_party/rust/cargo-platform/tests/test_cfg.rs new file mode 100644 index 0000000000..dd99d9a79b --- /dev/null +++ b/third_party/rust/cargo-platform/tests/test_cfg.rs @@ -0,0 +1,251 @@ +use cargo_platform::{Cfg, CfgExpr, Platform}; +use std::fmt; +use std::str::FromStr; + +macro_rules! c { + ($a:ident) => { + Cfg::Name(stringify!($a).to_string()) + }; + ($a:ident = $e:expr) => { + Cfg::KeyPair(stringify!($a).to_string(), $e.to_string()) + }; +} + +macro_rules! e { + (any($($t:tt),*)) => (CfgExpr::Any(vec![$(e!($t)),*])); + (all($($t:tt),*)) => (CfgExpr::All(vec![$(e!($t)),*])); + (not($($t:tt)*)) => (CfgExpr::Not(Box::new(e!($($t)*)))); + (($($t:tt)*)) => (e!($($t)*)); + ($($t:tt)*) => (CfgExpr::Value(c!($($t)*))); +} + +fn good<T>(s: &str, expected: T) +where + T: FromStr + PartialEq + fmt::Debug, + T::Err: fmt::Display, +{ + let c = match T::from_str(s) { + Ok(c) => c, + Err(e) => panic!("failed to parse `{}`: {}", s, e), + }; + assert_eq!(c, expected); +} + +fn bad<T>(s: &str, err: &str) +where + T: FromStr + fmt::Display, + T::Err: fmt::Display, +{ + let e = match T::from_str(s) { + Ok(cfg) => panic!("expected `{}` to not parse but got {}", s, cfg), + Err(e) => e.to_string(), + }; + assert!( + e.contains(err), + "when parsing `{}`,\n\"{}\" not contained \ + inside: {}", + s, + err, + e + ); +} + +#[test] +fn cfg_syntax() { + good("foo", c!(foo)); + good("_bar", c!(_bar)); + good(" foo", c!(foo)); + good(" foo ", c!(foo)); + good(" foo = \"bar\"", c!(foo = "bar")); + good("foo=\"\"", c!(foo = "")); + good(" foo=\"3\" ", c!(foo = "3")); + good("foo = \"3 e\"", c!(foo = "3 e")); +} + +#[test] +fn cfg_syntax_bad() { + bad::<Cfg>("", "but cfg expression ended"); + bad::<Cfg>(" ", "but cfg expression ended"); + bad::<Cfg>("\t", "unexpected character"); + bad::<Cfg>("7", "unexpected character"); + bad::<Cfg>("=", "expected identifier"); + bad::<Cfg>(",", "expected identifier"); + bad::<Cfg>("(", "expected identifier"); + bad::<Cfg>("foo (", "unexpected content `(` found after cfg expression"); + bad::<Cfg>("bar =", "expected a string"); + bad::<Cfg>("bar = \"", "unterminated string"); + bad::<Cfg>( + "foo, bar", + "unexpected content `, bar` found after cfg expression", + ); +} + +#[test] +fn cfg_expr() { + good("foo", e!(foo)); + good("_bar", e!(_bar)); + good(" foo", e!(foo)); + good(" foo ", e!(foo)); + good(" foo = \"bar\"", e!(foo = "bar")); + good("foo=\"\"", e!(foo = "")); + good(" foo=\"3\" ", e!(foo = "3")); + good("foo = \"3 e\"", e!(foo = "3 e")); + + good("all()", e!(all())); + good("all(a)", e!(all(a))); + good("all(a, b)", e!(all(a, b))); + good("all(a, )", e!(all(a))); + good("not(a = \"b\")", e!(not(a = "b"))); + good("not(all(a))", e!(not(all(a)))); +} + +#[test] +fn cfg_expr_bad() { + bad::<CfgExpr>(" ", "but cfg expression ended"); + bad::<CfgExpr>(" all", "expected `(`"); + bad::<CfgExpr>("all(a", "expected `)`"); + bad::<CfgExpr>("not", "expected `(`"); + bad::<CfgExpr>("not(a", "expected `)`"); + bad::<CfgExpr>("a = ", "expected a string"); + bad::<CfgExpr>("all(not())", "expected identifier"); + bad::<CfgExpr>( + "foo(a)", + "unexpected content `(a)` found after cfg expression", + ); +} + +#[test] +fn cfg_matches() { + assert!(e!(foo).matches(&[c!(bar), c!(foo), c!(baz)])); + assert!(e!(any(foo)).matches(&[c!(bar), c!(foo), c!(baz)])); + assert!(e!(any(foo, bar)).matches(&[c!(bar)])); + assert!(e!(any(foo, bar)).matches(&[c!(foo)])); + assert!(e!(all(foo, bar)).matches(&[c!(foo), c!(bar)])); + assert!(e!(all(foo, bar)).matches(&[c!(foo), c!(bar)])); + assert!(e!(not(foo)).matches(&[c!(bar)])); + assert!(e!(not(foo)).matches(&[])); + assert!(e!(any((not(foo)), (all(foo, bar)))).matches(&[c!(bar)])); + assert!(e!(any((not(foo)), (all(foo, bar)))).matches(&[c!(foo), c!(bar)])); + + assert!(!e!(foo).matches(&[])); + assert!(!e!(foo).matches(&[c!(bar)])); + assert!(!e!(foo).matches(&[c!(fo)])); + assert!(!e!(any(foo)).matches(&[])); + assert!(!e!(any(foo)).matches(&[c!(bar)])); + assert!(!e!(any(foo)).matches(&[c!(bar), c!(baz)])); + assert!(!e!(all(foo)).matches(&[c!(bar), c!(baz)])); + assert!(!e!(all(foo, bar)).matches(&[c!(bar)])); + assert!(!e!(all(foo, bar)).matches(&[c!(foo)])); + assert!(!e!(all(foo, bar)).matches(&[])); + assert!(!e!(not(bar)).matches(&[c!(bar)])); + assert!(!e!(not(bar)).matches(&[c!(baz), c!(bar)])); + assert!(!e!(any((not(foo)), (all(foo, bar)))).matches(&[c!(foo)])); +} + +#[test] +fn bad_target_name() { + bad::<Platform>( + "any(cfg(unix), cfg(windows))", + "failed to parse `any(cfg(unix), cfg(windows))` as a cfg expression: \ + invalid target specifier: unexpected `(` character, \ + cfg expressions must start with `cfg(`", + ); + bad::<Platform>( + "!foo", + "failed to parse `!foo` as a cfg expression: \ + invalid target specifier: unexpected character ! in target name", + ); +} + +#[test] +fn round_trip_platform() { + fn rt(s: &str) { + let p = Platform::from_str(s).unwrap(); + let s2 = p.to_string(); + let p2 = Platform::from_str(&s2).unwrap(); + assert_eq!(p, p2); + } + rt("x86_64-apple-darwin"); + rt("foo"); + rt("cfg(windows)"); + rt("cfg(target_os = \"windows\")"); + rt( + "cfg(any(all(any(target_os = \"android\", target_os = \"linux\"), \ + any(target_arch = \"aarch64\", target_arch = \"arm\", target_arch = \"powerpc64\", \ + target_arch = \"x86\", target_arch = \"x86_64\")), \ + all(target_os = \"freebsd\", target_arch = \"x86_64\")))", + ); +} + +#[test] +fn check_cfg_attributes() { + fn ok(s: &str) { + let p = Platform::Cfg(s.parse().unwrap()); + let mut warnings = Vec::new(); + p.check_cfg_attributes(&mut warnings); + assert!( + warnings.is_empty(), + "Expected no warnings but got: {:?}", + warnings, + ); + } + + fn warn(s: &str, names: &[&str]) { + let p = Platform::Cfg(s.parse().unwrap()); + let mut warnings = Vec::new(); + p.check_cfg_attributes(&mut warnings); + assert_eq!( + warnings.len(), + names.len(), + "Expecter warnings about {:?} but got {:?}", + names, + warnings, + ); + for (name, warning) in names.iter().zip(warnings.iter()) { + assert!( + warning.contains(name), + "Expected warning about '{}' but got: {}", + name, + warning, + ); + } + } + + ok("unix"); + ok("windows"); + ok("any(not(unix), windows)"); + ok("foo"); + + ok("target_arch = \"abc\""); + ok("target_feature = \"abc\""); + ok("target_os = \"abc\""); + ok("target_family = \"abc\""); + ok("target_env = \"abc\""); + ok("target_endian = \"abc\""); + ok("target_pointer_width = \"abc\""); + ok("target_vendor = \"abc\""); + ok("bar = \"def\""); + + warn("test", &["test"]); + warn("debug_assertions", &["debug_assertions"]); + warn("proc_macro", &["proc_macro"]); + warn("feature = \"abc\"", &["feature"]); + + warn("any(not(debug_assertions), windows)", &["debug_assertions"]); + warn( + "any(not(feature = \"def\"), target_arch = \"abc\")", + &["feature"], + ); + warn( + "any(not(target_os = \"windows\"), proc_macro)", + &["proc_macro"], + ); + warn( + "any(not(feature = \"windows\"), proc_macro)", + &["feature", "proc_macro"], + ); + warn( + "all(not(debug_assertions), any(windows, proc_macro))", + &["debug_assertions", "proc_macro"], + ); +} |