Rollup merge of #144173 - Kivooeo:tidy_checks, r=jieyouxu

Remove tidy checks for `tests/ui/issues/`

r? ``````````@jieyouxu``````````

As it is making cleanup efforts more difficult.

This change was discussed here [#t-compiler > Discussion for ui test suite improvements @ 💬](https://rust-lang.zulipchat.com/#narrow/channel/131828-t-compiler/topic/Discussion.20for.20ui.20test.20suite.20improvements/near/529566433)

src/tools/tidy/src/ui_tests.rs

@@ -1,24 +1,12 @@
 //! Tidy check to ensure below in UI test directories:
-//! - the number of entries in each directory must be less than `ENTRY_LIMIT`
 //! - there are no stray `.stderr` files
 
-use std::collections::{BTreeSet, HashMap};
+use std::collections::BTreeSet;
 use std::ffi::OsStr;
 use std::fs;
 use std::io::Write;
 use std::path::{Path, PathBuf};
 
-use ignore::Walk;
-
-// FIXME: GitHub's UI truncates file lists that exceed 1000 entries, so these
-// should all be 1000 or lower. Limits significantly smaller than 1000 are also
-// desirable, because large numbers of files are unwieldy in general. See issue
-// #73494.
-const ENTRY_LIMIT: u32 = 901;
-// FIXME: The following limits should be reduced eventually.
-
-const ISSUES_ENTRY_LIMIT: u32 = 1616;
-
 const EXPECTED_TEST_FILE_EXTENSIONS: &[&str] = &[
     "rs",     // test source files
     "stderr", // expected stderr file, corresponds to a rs file
@@ -54,42 +42,6 @@ const EXTENSION_EXCEPTION_PATHS: &[&str] = &[
     "tests/ui/std/windows-bat-args3.bat", // tests escaping arguments through batch files
 ];
 
-fn check_entries(tests_path: &Path, bad: &mut bool) {
-    let mut directories: HashMap<PathBuf, u32> = HashMap::new();
-
-    for entry in Walk::new(tests_path.join("ui")).flatten() {
-        let parent = entry.path().parent().unwrap().to_path_buf();
-        *directories.entry(parent).or_default() += 1;
-    }
-
-    let (mut max, mut max_issues) = (0, 0);
-    for (dir_path, count) in directories {
-        let is_issues_dir = tests_path.join("ui/issues") == dir_path;
-        let (limit, maxcnt) = if is_issues_dir {
-            (ISSUES_ENTRY_LIMIT, &mut max_issues)
-        } else {
-            (ENTRY_LIMIT, &mut max)
-        };
-        *maxcnt = (*maxcnt).max(count);
-        if count > limit {
-            tidy_error!(
-                bad,
-                "following path contains more than {} entries, \
-                    you should move the test to some relevant subdirectory (current: {}): {}",
-                limit,
-                count,
-                dir_path.display()
-            );
-        }
-    }
-    if ISSUES_ENTRY_LIMIT > max_issues {
-        tidy_error!(
-            bad,
-            "`ISSUES_ENTRY_LIMIT` is too high (is {ISSUES_ENTRY_LIMIT}, should be {max_issues})"
-        );
-    }
-}
-
 pub fn check(root_path: &Path, bless: bool, bad: &mut bool) {
     let issues_txt_header = r#"============================================================
     ⚠️⚠️⚠️NOTHING SHOULD EVER BE ADDED TO THIS LIST⚠️⚠️⚠️
@@ -97,7 +49,6 @@ pub fn check(root_path: &Path, bless: bool, bad: &mut bool) {
 "#;
 
     let path = &root_path.join("tests");
-    check_entries(path, bad);
 
     // the list of files in ui tests that are allowed to start with `issue-XXXX`
     // BTreeSet because we would like a stable ordering so --bless works
@@ -179,7 +130,9 @@ pub fn check(root_path: &Path, bless: bool, bad: &mut bool) {
                     .unwrap()
                     .replace(std::path::MAIN_SEPARATOR_STR, "/");
 
-                if !remaining_issue_names.remove(stripped_path.as_str()) {
+                if !remaining_issue_names.remove(stripped_path.as_str())
+                    && !stripped_path.starts_with("ui/issues/")
+                {
                     tidy_error!(
                         bad,
                         "file `tests/{stripped_path}` must begin with a descriptive name, consider `{{reason}}-issue-{issue_n}.rs`",

triagebot.toml

@@ -1147,6 +1147,12 @@ cc = ["@nnethercote"]
 message = "Changes to the size of AST and/or HIR nodes."
 cc = ["@nnethercote"]
 
+[mentions."tests/ui/issues"]
+message = """
+This PR modifies `tests/ui/issues/`. If this PR is adding new tests to `tests/ui/issues/`,
+please refrain from doing so, and instead add it to more descriptive subdirectories.
+"""
+
 [mentions."compiler/rustc_sanitizers"]
 cc = ["@rcvalle"]