Rollup merge of #112297 - jyn514:remove-exclude-kind, r=Mark-Simulacrum

bootstrap: Disallow `--exclude test::std`

Use the top-level Kind to determine whether Steps are excluded.

Previously, this would use the `Kind` passed to `--exclude` (and not do any filtering at all if no kind was passed).
That meant that `x test linkchecker --exclude std` would fail - you had to explicitly say `--exclude test::std`.

Change bootstrap to use the top-level Kind instead, which does the right thing automatically.
Note that this breaks things like `x test --exclude doc::std`, but I'm not sure why you'd ever want to do that.

There's a lot of churn here, but the 1-line change in the first commit is the actual behavior change, the rest is just cleanup.

Fixes https://github.com/rust-lang/rust/issues/103201. Note that this effectively reverts most of https://github.com/rust-lang/rust/pull/91965.

cc `@pietroalbini`

src/bootstrap/CHANGELOG.md

@@ -18,6 +18,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - `x.py fmt` now formats only files modified between the merge-base of HEAD and the last commit in the master branch of the rust-lang repository and the current working directory. To restore old behaviour, use `x.py fmt .`. The check mode is not affected by this change. [#105702](https://github.com/rust-lang/rust/pull/105702)
 - The `llvm.version-check` config option has been removed. Older versions were never supported. If you still need to support older versions (e.g. you are applying custom patches), patch `check_llvm_version` in bootstrap to change the minimum version. [#108619](https://github.com/rust-lang/rust/pull/108619)
 - The `rust.ignore-git` option has been renamed to `rust.omit-git-hash`. [#110059](https://github.com/rust-lang/rust/pull/110059)
+- `--exclude` no longer accepts a `Kind` as part of a Step; instead it uses the top-level Kind of the subcommand. If this matches how you were already using --exclude (e.g. `x test --exclude test::std`), simply remove the kind: `--exclude std`. If you were using a kind that did not match the top-level subcommand, please open an issue explaining why you wanted this feature.
 
 ### Non-breaking changes
 

src/bootstrap/builder.rs

@@ -8,7 +8,7 @@ use std::fs::{self, File};
 use std::hash::Hash;
 use std::io::{BufRead, BufReader};
 use std::ops::Deref;
-use std::path::{Component, Path, PathBuf};
+use std::path::{Path, PathBuf};
 use std::process::Command;
 use std::time::{Duration, Instant};
 
@@ -150,29 +150,6 @@ pub struct TaskPath {
     pub kind: Option<Kind>,
 }
 
-impl TaskPath {
-    pub fn parse(path: impl Into<PathBuf>) -> TaskPath {
-        let mut kind = None;
-        let mut path = path.into();
-
-        let mut components = path.components();
-        if let Some(Component::Normal(os_str)) = components.next() {
-            if let Some(str) = os_str.to_str() {
-                if let Some((found_kind, found_prefix)) = str.split_once("::") {
-                    if found_kind.is_empty() {
-                        panic!("empty kind in task path {}", path.display());
-                    }
-                    kind = Kind::parse(found_kind);
-                    assert!(kind.is_some());
-                    path = Path::new(found_prefix).join(components.as_path());
-                }
-            }
-        }
-
-        TaskPath { path, kind }
-    }
-}
-
 impl Debug for TaskPath {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         if let Some(kind) = &self.kind {
@@ -216,7 +193,7 @@ impl PathSet {
         PathSet::Set(set)
     }
 
-    fn has(&self, needle: &Path, module: Option<Kind>) -> bool {
+    fn has(&self, needle: &Path, module: Kind) -> bool {
         match self {
             PathSet::Set(set) => set.iter().any(|p| Self::check(p, needle, module)),
             PathSet::Suite(suite) => Self::check(suite, needle, module),
@@ -224,9 +201,9 @@ impl PathSet {
     }
 
     // internal use only
-    fn check(p: &TaskPath, needle: &Path, module: Option<Kind>) -> bool {
-        if let (Some(p_kind), Some(kind)) = (&p.kind, module) {
-            p.path.ends_with(needle) && *p_kind == kind
+    fn check(p: &TaskPath, needle: &Path, module: Kind) -> bool {
+        if let Some(p_kind) = &p.kind {
+            p.path.ends_with(needle) && *p_kind == module
         } else {
             p.path.ends_with(needle)
         }
@@ -238,11 +215,7 @@ impl PathSet {
     /// This is used for `StepDescription::krate`, which passes all matching crates at once to
     /// `Step::make_run`, rather than calling it many times with a single crate.
     /// See `tests.rs` for examples.
-    fn intersection_removing_matches(
-        &self,
-        needles: &mut Vec<&Path>,
-        module: Option<Kind>,
-    ) -> PathSet {
+    fn intersection_removing_matches(&self, needles: &mut Vec<&Path>, module: Kind) -> PathSet {
         let mut check = |p| {
             for (i, n) in needles.iter().enumerate() {
                 let matched = Self::check(p, n, module);
@@ -307,7 +280,7 @@ impl StepDescription {
     }
 
     fn is_excluded(&self, builder: &Builder<'_>, pathset: &PathSet) -> bool {
-        if builder.config.exclude.iter().any(|e| pathset.has(&e.path, e.kind)) {
+        if builder.config.exclude.iter().any(|e| pathset.has(&e, builder.kind)) {
             println!("Skipping {:?} because it is excluded", pathset);
             return true;
         }
@@ -562,7 +535,7 @@ impl<'a> ShouldRun<'a> {
     ) -> Vec<PathSet> {
         let mut sets = vec![];
         for pathset in &self.paths {
-            let subset = pathset.intersection_removing_matches(paths, Some(kind));
+            let subset = pathset.intersection_removing_matches(paths, kind);
             if subset != PathSet::empty() {
                 sets.push(subset);
             }
@@ -2138,7 +2111,7 @@ impl<'a> Builder<'a> {
         let should_run = (desc.should_run)(ShouldRun::new(self, desc.kind));
 
         for path in &self.paths {
-            if should_run.paths.iter().any(|s| s.has(path, Some(desc.kind)))
+            if should_run.paths.iter().any(|s| s.has(path, desc.kind))
                 && !desc.is_excluded(
                     self,
                     &PathSet::Suite(TaskPath { path: path.clone(), kind: Some(desc.kind) }),

src/bootstrap/builder/tests.rs

@@ -101,23 +101,21 @@ fn test_invalid() {
 
 #[test]
 fn test_intersection() {
-    let set = PathSet::Set(
-        ["library/core", "library/alloc", "library/std"].into_iter().map(TaskPath::parse).collect(),
-    );
+    let set = |paths: &[&str]| {
+        PathSet::Set(paths.into_iter().map(|p| TaskPath { path: p.into(), kind: None }).collect())
+    };
+    let library_set = set(&["library/core", "library/alloc", "library/std"]);
     let mut command_paths =
         vec![Path::new("library/core"), Path::new("library/alloc"), Path::new("library/stdarch")];
-    let subset = set.intersection_removing_matches(&mut command_paths, None);
-    assert_eq!(
-        subset,
-        PathSet::Set(["library/core", "library/alloc"].into_iter().map(TaskPath::parse).collect())
-    );
+    let subset = library_set.intersection_removing_matches(&mut command_paths, Kind::Build);
+    assert_eq!(subset, set(&["library/core", "library/alloc"]),);
     assert_eq!(command_paths, vec![Path::new("library/stdarch")]);
 }
 
 #[test]
 fn test_exclude() {
     let mut config = configure("test", &["A"], &["A"]);
-    config.exclude = vec![TaskPath::parse("src/tools/tidy")];
+    config.exclude = vec!["src/tools/tidy".into()];
     let cache = run_build(&[], config);
 
     // Ensure we have really excluded tidy
@@ -129,21 +127,16 @@ fn test_exclude() {
 
 #[test]
 fn test_exclude_kind() {
-    let path = PathBuf::from("src/tools/cargotest");
-    let exclude = TaskPath::parse("test::src/tools/cargotest");
-    assert_eq!(exclude, TaskPath { kind: Some(Kind::Test), path: path.clone() });
+    let path = PathBuf::from("compiler/rustc_data_structures");
 
     let mut config = configure("test", &["A"], &["A"]);
-    // Ensure our test is valid, and `test::Cargotest` would be run without the exclude.
-    assert!(run_build(&[path.clone()], config.clone()).contains::<test::Cargotest>());
-    // Ensure tests for cargotest are skipped.
-    config.exclude = vec![exclude.clone()];
-    assert!(!run_build(&[path.clone()], config).contains::<test::Cargotest>());
-
-    // Ensure builds for cargotest are not skipped.
-    let mut config = configure("build", &["A"], &["A"]);
-    config.exclude = vec![exclude];
-    assert!(run_build(&[path], config).contains::<tool::CargoTest>());
+    // Ensure our test is valid, and `test::Rustc` would be run without the exclude.
+    assert!(run_build(&[], config.clone()).contains::<test::CrateLibrustc>());
+    // Ensure tests for rustc are skipped.
+    config.exclude = vec![path.clone()];
+    assert!(!run_build(&[], config.clone()).contains::<test::CrateLibrustc>());
+    // Ensure builds for rustc are not skipped.
+    assert!(run_build(&[], config).contains::<compile::Rustc>());
 }
 
 /// Ensure that if someone passes both a single crate and `library`, all library crates get built.

src/bootstrap/config.rs

@@ -17,7 +17,6 @@ use std::path::{Path, PathBuf};
 use std::process::Command;
 use std::str::FromStr;
 
-use crate::builder::TaskPath;
 use crate::cache::{Interned, INTERNER};
 use crate::cc_detect::{ndk_compiler, Language};
 use crate::channel::{self, GitInfo};
@@ -80,7 +79,7 @@ pub struct Config {
     pub sanitizers: bool,
     pub profiler: bool,
     pub omit_git_hash: bool,
-    pub exclude: Vec<TaskPath>,
+    pub exclude: Vec<PathBuf>,
     pub include_default_paths: bool,
     pub rustc_error_format: Option<String>,
     pub json_output: bool,
@@ -957,7 +956,7 @@ impl Config {
 
         // Set flags.
         config.paths = std::mem::take(&mut flags.paths);
-        config.exclude = flags.exclude.into_iter().map(|path| TaskPath::parse(path)).collect();
+        config.exclude = flags.exclude;
         config.include_default_paths = flags.include_default_paths;
         config.rustc_error_format = flags.rustc_error_format;
         config.json_output = flags.json_output;

src/bootstrap/test.rs

@@ -1537,7 +1537,7 @@ note: if you're sure you want to do this, please open an issue as to why. In the
 
         for exclude in &builder.config.exclude {
             cmd.arg("--skip");
-            cmd.arg(&exclude.path);
+            cmd.arg(&exclude);
         }
 
         // Get paths from cmd args