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use regex::bytes::Regex;
use crate::{dependencies::build_dependencies, CommandBuilder, Filter, Match, Mode};
pub use color_eyre;
use color_eyre::eyre::Result;
use std::{
ffi::OsString,
num::NonZeroUsize,
path::{Path, PathBuf},
};
#[derive(Debug, Clone)]
/// Central datastructure containing all information to run the tests.
pub struct Config {
/// Arguments passed to the binary that is executed.
/// These arguments are passed *after* the args inserted via `//@compile-flags:`.
pub trailing_args: Vec<OsString>,
/// Host triple; usually will be auto-detected.
pub host: Option<String>,
/// `None` to run on the host, otherwise a target triple
pub target: Option<String>,
/// Filters applied to stderr output before processing it.
/// By default contains a filter for replacing backslashes with regular slashes.
/// On windows, contains a filter to replace `\n` with `\r\n`.
pub stderr_filters: Filter,
/// Filters applied to stdout output before processing it.
/// On windows, contains a filter to replace `\n` with `\r\n`.
pub stdout_filters: Filter,
/// The folder in which to start searching for .rs files
pub root_dir: PathBuf,
/// The mode in which to run the tests.
pub mode: Mode,
/// The binary to actually execute.
pub program: CommandBuilder,
/// The command to run to obtain the cfgs that the output is supposed to
pub cfgs: CommandBuilder,
/// What to do in case the stdout/stderr output differs from the expected one.
/// By default, errors in case of conflict, but emits a message informing the user
/// that running `cargo test -- -- --bless` will automatically overwrite the
/// `.stdout` and `.stderr` files with the latest output.
pub output_conflict_handling: OutputConflictHandling,
/// Path to a `Cargo.toml` that describes which dependencies the tests can access.
pub dependencies_crate_manifest_path: Option<PathBuf>,
/// The command to run can be changed from `cargo` to any custom command to build the
/// dependencies in `dependencies_crate_manifest_path`
pub dependency_builder: CommandBuilder,
/// How many threads to use for running tests. Defaults to number of cores
pub num_test_threads: NonZeroUsize,
/// Where to dump files like the binaries compiled from tests.
/// Defaults to `target/ui` in the current directory.
pub out_dir: PathBuf,
/// The default edition to use on all tests
pub edition: Option<String>,
}
impl Config {
/// Create a configuration for testing the output of running
/// `rustc` on the test files.
pub fn rustc(root_dir: PathBuf) -> Self {
Self {
trailing_args: vec![],
host: None,
target: None,
stderr_filters: vec![
(Match::Exact(vec![b'\\']), b"/"),
#[cfg(windows)]
(Match::Exact(vec![b'\r']), b""),
],
stdout_filters: vec![
#[cfg(windows)]
(Match::Exact(vec![b'\r']), b""),
],
root_dir,
mode: Mode::Fail {
require_patterns: true,
},
program: CommandBuilder::rustc(),
cfgs: CommandBuilder::cfgs(),
output_conflict_handling: OutputConflictHandling::Error(
"cargo test -- -- --bless".into(),
),
dependencies_crate_manifest_path: None,
dependency_builder: CommandBuilder::cargo(),
num_test_threads: std::thread::available_parallelism().unwrap(),
out_dir: std::env::var_os("CARGO_TARGET_DIR")
.map(PathBuf::from)
.unwrap_or_else(|| std::env::current_dir().unwrap().join("target"))
.join("ui"),
edition: Some("2021".into()),
}
}
/// Create a configuration for testing the output of running
/// `cargo` on the test `Cargo.toml` files.
pub fn cargo(root_dir: PathBuf) -> Self {
Self {
program: CommandBuilder::cargo(),
edition: None,
..Self::rustc(root_dir)
}
}
/// Replace all occurrences of a path in stderr with a byte string.
pub fn path_stderr_filter(
&mut self,
path: &Path,
replacement: &'static (impl AsRef<[u8]> + ?Sized),
) {
let pattern = path.canonicalize().unwrap();
self.stderr_filters
.push((pattern.parent().unwrap().into(), replacement.as_ref()));
}
/// Replace all occurrences of a regex pattern in stderr with a byte string.
pub fn stderr_filter(
&mut self,
pattern: &str,
replacement: &'static (impl AsRef<[u8]> + ?Sized),
) {
self.stderr_filters
.push((Regex::new(pattern).unwrap().into(), replacement.as_ref()));
}
/// Replace all occurrences of a regex pattern in stdout with a byte string.
pub fn stdout_filter(
&mut self,
pattern: &str,
replacement: &'static (impl AsRef<[u8]> + ?Sized),
) {
self.stdout_filters
.push((Regex::new(pattern).unwrap().into(), replacement.as_ref()));
}
/// Compile dependencies and make sure `Config::program` contains the right flags
/// to find the dependencies.
pub fn build_dependencies_and_link_them(&mut self) -> Result<()> {
let dependencies = build_dependencies(self)?;
for (name, artifacts) in dependencies.dependencies {
for dependency in artifacts {
self.program.args.push("--extern".into());
let mut dep = OsString::from(&name);
dep.push("=");
dep.push(dependency);
self.program.args.push(dep);
}
}
for import_path in dependencies.import_paths {
self.program.args.push("-L".into());
self.program.args.push(import_path.into());
}
Ok(())
}
/// Make sure we have the host and target triples.
pub fn fill_host_and_target(&mut self) -> Result<()> {
if self.host.is_none() {
self.host = Some(
rustc_version::VersionMeta::for_command(std::process::Command::new(
&self.program.program,
))
.map_err(|err| {
color_eyre::eyre::Report::new(err).wrap_err(format!(
"failed to parse rustc version info: {}",
self.program.display()
))
})?
.host,
);
}
if self.target.is_none() {
self.target = Some(self.host.clone().unwrap());
}
Ok(())
}
pub(crate) fn has_asm_support(&self) -> bool {
static ASM_SUPPORTED_ARCHS: &[&str] = &[
"x86", "x86_64", "arm", "aarch64", "riscv32",
"riscv64",
// These targets require an additional asm_experimental_arch feature.
// "nvptx64", "hexagon", "mips", "mips64", "spirv", "wasm32",
];
ASM_SUPPORTED_ARCHS
.iter()
.any(|arch| self.target.as_ref().unwrap().contains(arch))
}
}
#[derive(Debug, Clone)]
/// The different options for what to do when stdout/stderr files differ from the actual output.
pub enum OutputConflictHandling {
/// The default: emit a diff of the expected/actual output.
///
/// The string should be a command that can be executed to bless all tests.
Error(String),
/// Ignore mismatches in the stderr/stdout files.
Ignore,
/// Instead of erroring if the stderr/stdout differs from the expected
/// automatically replace it with the found output (after applying filters).
Bless,
}
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