mirror of https://github.com/rust-lang/rust
106 lines
3.1 KiB
Rust
106 lines
3.1 KiB
Rust
//! This checks the output of `--print=cfg`
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//!
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//! Specifically it checks that output is correctly formatted
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//! (ie. no duplicated cfgs, values are between "", names are not).
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//!
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//! It also checks that some targets have the correct set cfgs.
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// ignore-tidy-linelength
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//@ needs-llvm-components: arm x86
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// Note: without the needs-llvm-components it will fail on LLVM built without the required
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// components listed above.
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use std::collections::HashSet;
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use std::iter::FromIterator;
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use std::path::PathBuf;
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use run_make_support::{rfs, rustc};
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struct PrintCfg {
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target: &'static str,
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includes: &'static [&'static str],
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disallow: &'static [&'static str],
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}
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fn main() {
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check(PrintCfg {
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target: "x86_64-pc-windows-gnu",
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includes: &["windows", "target_arch=\"x86_64\""],
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disallow: &["unix"],
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});
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check(PrintCfg {
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target: "i686-pc-windows-msvc",
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includes: &["windows", "target_env=\"msvc\""],
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disallow: &["unix"],
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});
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check(PrintCfg {
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target: "i686-apple-darwin",
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includes: &["unix", "target_os=\"macos\"", "target_vendor=\"apple\""],
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disallow: &["windows"],
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});
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check(PrintCfg {
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target: "i686-unknown-linux-gnu",
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includes: &["unix", "target_env=\"gnu\""],
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disallow: &["windows"],
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});
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check(PrintCfg {
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target: "arm-unknown-linux-gnueabihf",
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includes: &["unix", "target_abi=\"eabihf\""],
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disallow: &["windows"],
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});
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}
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fn check(PrintCfg { target, includes, disallow }: PrintCfg) {
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fn check_(output: &str, includes: &[&str], disallow: &[&str]) {
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let mut found = HashSet::<String>::new();
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let mut recorded = HashSet::<String>::new();
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for l in output.lines() {
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assert!(l == l.trim());
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if let Some((left, right)) = l.split_once('=') {
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assert!(right.starts_with("\""));
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assert!(right.ends_with("\""));
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assert!(!left.contains("\""));
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} else {
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assert!(!l.contains("\""));
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}
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assert!(recorded.insert(l.to_string()), "duplicated: {}", &l);
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assert!(!disallow.contains(&l), "found disallowed: {}", &l);
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if includes.contains(&l) {
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assert!(found.insert(l.to_string()), "duplicated (includes): {}", &l);
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}
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}
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let should_found = HashSet::<String>::from_iter(includes.iter().map(|s| s.to_string()));
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let diff: Vec<_> = should_found.difference(&found).collect();
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assert!(
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diff.is_empty(),
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"expected: {:?}, found: {:?} (~ {:?})",
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&should_found,
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&found,
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&diff
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);
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}
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// --print=cfg
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{
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let output = rustc().target(target).print("cfg").run();
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let stdout = output.stdout_utf8();
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check_(&stdout, includes, disallow);
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}
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// --print=cfg=PATH
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{
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let tmp_path = PathBuf::from(format!("{target}.cfg"));
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rustc().target(target).print(&format!("cfg={}", tmp_path.display())).run();
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let output = rfs::read_to_string(&tmp_path);
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check_(&output, includes, disallow);
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}
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}
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