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https://github.com/rust-lang/rust-clippy
synced 2024-11-27 07:00:55 +00:00
Use binary-dep-depinfo to resolve UI dependencies
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3 changed files with 88 additions and 80 deletions
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@ -5,4 +5,5 @@ lintcheck = "run --target-dir lintcheck/target --package lintcheck --bin lintche
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collect-metadata = "test --test dogfood --features metadata-collector-lint -- run_metadata_collection_lint --ignored"
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[build]
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rustflags = ["-Zunstable-options"]
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# -Zbinary-dep-depinfo allows us to track which rlib files to use for compiling UI tests
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rustflags = ["-Zunstable-options", "-Zbinary-dep-depinfo"]
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13
Cargo.toml
13
Cargo.toml
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@ -32,11 +32,7 @@ tempfile = { version = "3.1.0", optional = true }
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cargo_metadata = "0.12"
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compiletest_rs = { version = "0.6.0", features = ["tmp"] }
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tester = "0.9"
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serde = { version = "1.0", features = ["derive"] }
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derive-new = "0.5"
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regex = "1.4"
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quote = "1"
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syn = { version = "1", features = ["full"] }
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# This is used by the `collect-metadata` alias.
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filetime = "0.2"
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@ -45,6 +41,15 @@ filetime = "0.2"
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# for more information.
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rustc-workspace-hack = "1.0.0"
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# UI test dependencies
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clippy_utils = { path = "clippy_utils" }
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derive-new = "0.5"
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if_chain = "1.0"
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itertools = "0.10.1"
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quote = "1"
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serde = { version = "1.0", features = ["derive"] }
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syn = { version = "1", features = ["full"] }
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[build-dependencies]
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rustc_tools_util = { version = "0.2.0", path = "rustc_tools_util" }
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@ -1,10 +1,10 @@
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#![feature(test)] // compiletest_rs requires this attribute
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#![feature(once_cell)]
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#![feature(try_blocks)]
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use compiletest_rs as compiletest;
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use compiletest_rs::common::Mode as TestMode;
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use std::collections::HashMap;
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use std::env::{self, remove_var, set_var, var_os};
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use std::ffi::{OsStr, OsString};
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use std::fs;
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@ -16,6 +16,28 @@ mod cargo;
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// whether to run internal tests or not
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const RUN_INTERNAL_TESTS: bool = cfg!(feature = "internal-lints");
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/// All crates used in UI tests are listed here
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static TEST_DEPENDENCIES: &[&str] = &[
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"clippy_utils",
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"derive_new",
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"if_chain",
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"itertools",
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"quote",
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"regex",
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"serde",
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"serde_derive",
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"syn",
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];
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// Test dependencies may need an `extern crate` here to ensure that they show up
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// in the depinfo file (otherwise cargo thinks they are unused)
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extern crate clippy_utils;
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extern crate derive_new;
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extern crate if_chain;
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extern crate itertools;
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extern crate quote;
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extern crate syn;
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fn host_lib() -> PathBuf {
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option_env!("HOST_LIBS").map_or(cargo::CARGO_TARGET_DIR.join(env!("PROFILE")), PathBuf::from)
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}
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@ -24,72 +46,58 @@ fn clippy_driver_path() -> PathBuf {
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option_env!("CLIPPY_DRIVER_PATH").map_or(cargo::TARGET_LIB.join("clippy-driver"), PathBuf::from)
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}
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// When we'll want to use `extern crate ..` for a dependency that is used
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// both by the crate and the compiler itself, we can't simply pass -L flags
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// as we'll get a duplicate matching versions. Instead, disambiguate with
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// `--extern dep=path`.
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// See https://github.com/rust-lang/rust-clippy/issues/4015.
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//
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// FIXME: We cannot use `cargo build --message-format=json` to resolve to dependency files.
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// Because it would force-rebuild if the options passed to `build` command is not the same
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// as what we manually pass to `cargo` invocation
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fn third_party_crates() -> String {
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use std::collections::HashMap;
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static CRATES: &[&str] = &[
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"clippy_lints",
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"clippy_utils",
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"if_chain",
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"itertools",
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"quote",
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"regex",
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"serde",
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"serde_derive",
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"syn",
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];
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let dep_dir = cargo::TARGET_LIB.join("deps");
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let mut crates: HashMap<&str, Vec<PathBuf>> = HashMap::with_capacity(CRATES.len());
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let mut flags = String::new();
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for entry in fs::read_dir(dep_dir).unwrap().flatten() {
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let path = entry.path();
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if let Some(name) = try {
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let name = path.file_name()?.to_str()?;
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let (name, _) = name.strip_suffix(".rlib")?.strip_prefix("lib")?.split_once('-')?;
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CRATES.iter().copied().find(|&c| c == name)?
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} {
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flags += &format!(" --extern {}={}", name, path.display());
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crates.entry(name).or_default().push(path.clone());
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/// Produces a string with an `--extern` flag for all UI test crate
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/// dependencies.
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///
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/// The dependency files are located by parsing the depinfo file for this test
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/// module. This assumes the `-Z binary-dep-depinfo` flag is enabled. All test
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/// dependencies must be added to Cargo.toml at the project root. Test
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/// dependencies that are not *directly* used by this test module require an
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/// `extern crate` declaration.
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fn extern_flags() -> String {
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let current_exe_depinfo = {
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let mut path = env::current_exe().unwrap();
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path.set_extension("d");
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std::fs::read_to_string(path).unwrap()
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};
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let mut crates: HashMap<&str, &str> = HashMap::with_capacity(TEST_DEPENDENCIES.len());
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for line in current_exe_depinfo.lines() {
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// each dependency is expected to have a Makefile rule like `/path/to/crate-hash.rlib:`
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let parse_name_path = || {
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if line.starts_with(char::is_whitespace) {
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return None;
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}
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let path_str = line.strip_suffix(':')?;
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let path = Path::new(path_str);
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if !matches!(path.extension()?.to_str()?, "rlib" | "so" | "dylib" | "dll") {
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return None;
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}
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let (name, _hash) = path.file_stem()?.to_str()?.rsplit_once('-')?;
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// the "lib" prefix is not present for dll files
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let name = name.strip_prefix("lib").unwrap_or(name);
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Some((name, path_str))
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};
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if let Some((name, path)) = parse_name_path() {
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if TEST_DEPENDENCIES.contains(&name) {
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// A dependency may be listed twice if it is available in sysroot,
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// and the sysroot dependencies are listed first. As of the writing,
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// this only seems to apply to if_chain.
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crates.insert(name, path);
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}
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}
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}
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crates.retain(|_, paths| paths.len() > 1);
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if !crates.is_empty() {
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let crate_names = crates.keys().map(|s| format!("`{}`", s)).collect::<Vec<_>>().join(", ");
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// add backslashes for an easy copy-paste `rm` command
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let paths = crates
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.into_values()
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.flatten()
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.map(|p| strip_current_dir(&p).display().to_string())
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.collect::<Vec<_>>()
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.join(" \\\n");
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// Check which action should be done in order to remove compiled deps.
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// If pre-installed version of compiler is used, `cargo clean` will do.
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// Otherwise (for bootstrapped compiler), the dependencies directory
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// must be removed manually.
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let suggested_action = if std::env::var_os("RUSTC_BOOTSTRAP").is_some() {
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"removing the stageN-tools directory"
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} else {
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"running `cargo clean`"
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};
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panic!(
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"\n----------------------------------------------------------------------\n\
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ERROR: Found multiple rlibs for crates: {}\n\
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Try {} or remove the following files:\n\n{}\n\n\
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For details on this error see https://github.com/rust-lang/rust-clippy/issues/7343\n\
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----------------------------------------------------------------------\n",
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crate_names, suggested_action, paths
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);
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let not_found: Vec<&str> = TEST_DEPENDENCIES
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.iter()
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.copied()
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.filter(|n| !crates.contains_key(n))
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.collect();
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if !not_found.is_empty() {
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panic!("dependencies not found in depinfo: {:?}", not_found);
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}
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flags
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crates
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.into_iter()
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.map(|(name, path)| format!("--extern {}={} ", name, path))
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.collect()
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}
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fn default_config() -> compiletest::Config {
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@ -105,11 +113,14 @@ fn default_config() -> compiletest::Config {
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config.compile_lib_path = path;
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}
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// Using `-L dependency={}` enforces that external dependencies are added with `--extern`.
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// This is valuable because a) it allows us to monitor what external dependencies are used
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// and b) it ensures that conflicting rlibs are resolved properly.
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config.target_rustcflags = Some(format!(
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"--emit=metadata -L {0} -L {1} -Dwarnings -Zui-testing {2}",
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"--emit=metadata -L dependency={} -L dependency={} -Dwarnings -Zui-testing {}",
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host_lib().join("deps").display(),
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cargo::TARGET_LIB.join("deps").display(),
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third_party_crates(),
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extern_flags(),
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));
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config.build_base = host_lib().join("test_build_base");
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@ -316,12 +327,3 @@ impl Drop for VarGuard {
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}
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}
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}
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fn strip_current_dir(path: &Path) -> &Path {
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if let Ok(curr) = env::current_dir() {
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if let Ok(stripped) = path.strip_prefix(curr) {
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return stripped;
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}
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}
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path
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}
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