Add a tidy rule to check that fluent messages and attrs don't end in .

Cargo.lock

@@ -5700,6 +5700,7 @@ name = "tidy"
 version = "0.1.0"
 dependencies = [
  "cargo_metadata 0.15.4",
+ "fluent-syntax",
  "ignore",
  "miropt-test-tools",
  "regex",

compiler/rustc_ast_lowering/messages.ftl

@@ -78,7 +78,7 @@ ast_lowering_inline_asm_unsupported_target =
 ast_lowering_invalid_abi =
  invalid ABI: found `{$abi}`
  .label = invalid ABI
- .note = invoke `{$command}` for a full list of supported calling conventions.
+ .note = invoke `{$command}` for a full list of supported calling conventions
 
 ast_lowering_invalid_abi_clobber_abi =
  invalid ABI for `clobber_abi`

compiler/rustc_const_eval/messages.ftl

@@ -341,8 +341,7 @@ const_eval_unallowed_fn_pointer_call = function pointer calls are not allowed in
 const_eval_unallowed_heap_allocations =
  allocations are not allowed in {const_eval_const_context}s
  .label = allocation not allowed in {const_eval_const_context}s
- .teach_note =
- The value of statics and constants must be known at compile time, and they live for the entire lifetime of a program. Creating a boxed value allocates memory on the heap at runtime, and therefore cannot be done at compile time.
+ .teach_note = The value of statics and constants must be known at compile time, and they live for the entire lifetime of a program. Creating a boxed value allocates memory on the heap at runtime, and therefore cannot be done at compile time.
 
 const_eval_unallowed_inline_asm =
  inline assembly is not allowed in {const_eval_const_context}s

compiler/rustc_hir_analysis/messages.ftl

@@ -194,7 +194,7 @@ hir_analysis_inherent_ty_outside = cannot define inherent `impl` for a type outs
  .span_help = alternatively add `#[rustc_has_incoherent_inherent_impls]` to the type and `#[rustc_allow_incoherent_impl]` to the relevant impl items
 
 hir_analysis_inherent_ty_outside_new = cannot define inherent `impl` for a type outside of the crate where the type is defined
- .label = impl for type defined outside of crate.
+ .label = impl for type defined outside of crate
  .note = define and implement a trait or new type instead
 
 hir_analysis_inherent_ty_outside_primitive = cannot define inherent `impl` for primitive types outside of `core`
@@ -544,7 +544,7 @@ hir_analysis_unrecognized_intrinsic_function =
 
 hir_analysis_unused_associated_type_bounds =
  unnecessary associated type bound for not object safe associated type
- .note = this associated type has a `where Self: Sized` bound. Thus, while the associated type can be specified, it cannot be used in any way, because trait objects are not `Sized`.
+ .note = this associated type has a `where Self: Sized` bound, and while the associated type can be specified, it cannot be used because trait objects are never `Sized`
  .suggestion = remove this bound
 
 hir_analysis_unused_generic_parameter =

compiler/rustc_lint/messages.ftl

@@ -75,7 +75,7 @@ lint_builtin_deprecated_attr_default_suggestion = remove this attribute
 lint_builtin_deprecated_attr_link = use of deprecated attribute `{$name}`: {$reason}. See {$link}
  .msg_suggestion = {$msg}
  .default_suggestion = remove this attribute
-lint_builtin_deprecated_attr_used = use of deprecated attribute `{$name}`: no longer used.
+lint_builtin_deprecated_attr_used = use of deprecated attribute `{$name}`: no longer used
 lint_builtin_deref_nullptr = dereferencing a null pointer
  .label = this code causes undefined behavior when executed
 
@@ -213,7 +213,7 @@ lint_default_hash_types = prefer `{$preferred}` over `{$used}`, it has better pe
 lint_default_source = `forbid` lint level is the default for {$id}
 
 lint_deprecated_lint_name =
- lint name `{$name}` is deprecated and may not have an effect in the future.
+ lint name `{$name}` is deprecated and may not have an effect in the future
  .suggestion = change it to
  .help = change it to {$replace}
 
@@ -244,11 +244,11 @@ lint_duplicate_matcher_binding = duplicate matcher binding
 
 lint_enum_intrinsics_mem_discriminant =
  the return value of `mem::discriminant` is unspecified when called with a non-enum type
- .note = the argument to `discriminant` should be a reference to an enum, but it was passed a reference to a `{$ty_param}`, which is not an enum.
+ .note = the argument to `discriminant` should be a reference to an enum, but it was passed a reference to a `{$ty_param}`, which is not an enum
 
 lint_enum_intrinsics_mem_variant =
  the return value of `mem::variant_count` is unspecified when called with a non-enum type
- .note = the type parameter of `variant_count` should be an enum, but it was instantiated with the type `{$ty_param}`, which is not an enum.
+ .note = the type parameter of `variant_count` should be an enum, but it was instantiated with the type `{$ty_param}`, which is not an enum
 
 lint_expectation = this lint expectation is unfulfilled
  .note = the `unfulfilled_lint_expectations` lint can't be expected and will always produce this message

compiler/rustc_metadata/messages.ftl

@@ -248,13 +248,13 @@ metadata_rustc_lib_required =
  .help = try adding `extern crate rustc_driver;` at the top level of this crate
 
 metadata_stable_crate_id_collision =
- found crates (`{$crate_name0}` and `{$crate_name1}`) with colliding StableCrateId values.
+ found crates (`{$crate_name0}` and `{$crate_name1}`) with colliding StableCrateId values
 
 metadata_std_required =
  `std` is required by `{$current_crate}` because it does not declare `#![no_std]`
 
 metadata_symbol_conflicts_current =
- the current crate is indistinguishable from one of its dependencies: it has the same crate-name `{$crate_name}` and was compiled with the same `-C metadata` arguments. This will result in symbol conflicts between the two.
+ the current crate is indistinguishable from one of its dependencies: it has the same crate-name `{$crate_name}` and was compiled with the same `-C metadata` arguments, so this will result in symbol conflicts between the two
 
 metadata_target_no_std_support =
  the `{$locator_triple}` target may not support the standard library

compiler/rustc_mir_build/messages.ftl

@@ -103,7 +103,7 @@ mir_build_deref_raw_pointer_requires_unsafe_unsafe_op_in_unsafe_fn_allowed =
  .note = raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
  .label = dereference of raw pointer
 
-mir_build_exceeds_mcdc_condition_limit = Number of conditions in decision ({$num_conditions}) exceeds limit ({$max_conditions}). MC/DC analysis will not count this expression.
+mir_build_exceeds_mcdc_condition_limit = number of conditions in decision ({$num_conditions}) exceeds limit ({$max_conditions}), so MC/DC analysis will not count this expression
 
 mir_build_extern_static_requires_unsafe =
  use of extern static is unsafe and requires unsafe block

compiler/rustc_passes/messages.ftl

@@ -14,7 +14,7 @@ passes_abi_of =
  fn_abi_of({$fn_name}) = {$fn_abi}
 
 passes_allow_incoherent_impl =
- `rustc_allow_incoherent_impl` attribute should be applied to impl items.
+ `rustc_allow_incoherent_impl` attribute should be applied to impl items
  .label = the only currently supported targets are inherent methods
 
 passes_allow_internal_unstable =
@@ -253,8 +253,8 @@ passes_doc_test_unknown_spotlight =
  .no_op_note = `doc(spotlight)` is now a no-op
 
 passes_duplicate_diagnostic_item_in_crate =
- duplicate diagnostic item in crate `{$crate_name}`: `{$name}`.
- .note = the diagnostic item is first defined in crate `{$orig_crate_name}`.
+ duplicate diagnostic item in crate `{$crate_name}`: `{$name}`
+ .note = the diagnostic item is first defined in crate `{$orig_crate_name}`
 
 passes_duplicate_feature_err =
  the feature `{$feature}` has already been declared
@@ -263,27 +263,27 @@ passes_duplicate_lang_item =
  found duplicate lang item `{$lang_item_name}`
  .first_defined_span = the lang item is first defined here
  .first_defined_crate_depends = the lang item is first defined in crate `{$orig_crate_name}` (which `{$orig_dependency_of}` depends on)
- .first_defined_crate = the lang item is first defined in crate `{$orig_crate_name}`.
+ .first_defined_crate = the lang item is first defined in crate `{$orig_crate_name}`
  .first_definition_local = first definition in the local crate (`{$orig_crate_name}`)
  .second_definition_local = second definition in the local crate (`{$crate_name}`)
  .first_definition_path = first definition in `{$orig_crate_name}` loaded from {$orig_path}
  .second_definition_path = second definition in `{$crate_name}` loaded from {$path}
 
 passes_duplicate_lang_item_crate =
- duplicate lang item in crate `{$crate_name}`: `{$lang_item_name}`.
+ duplicate lang item in crate `{$crate_name}`: `{$lang_item_name}`
  .first_defined_span = the lang item is first defined here
  .first_defined_crate_depends = the lang item is first defined in crate `{$orig_crate_name}` (which `{$orig_dependency_of}` depends on)
- .first_defined_crate = the lang item is first defined in crate `{$orig_crate_name}`.
+ .first_defined_crate = the lang item is first defined in crate `{$orig_crate_name}`
  .first_definition_local = first definition in the local crate (`{$orig_crate_name}`)
  .second_definition_local = second definition in the local crate (`{$crate_name}`)
  .first_definition_path = first definition in `{$orig_crate_name}` loaded from {$orig_path}
  .second_definition_path = second definition in `{$crate_name}` loaded from {$path}
 
 passes_duplicate_lang_item_crate_depends =
- duplicate lang item in crate `{$crate_name}` (which `{$dependency_of}` depends on): `{$lang_item_name}`.
+ duplicate lang item in crate `{$crate_name}` (which `{$dependency_of}` depends on): `{$lang_item_name}`
  .first_defined_span = the lang item is first defined here
  .first_defined_crate_depends = the lang item is first defined in crate `{$orig_crate_name}` (which `{$orig_dependency_of}` depends on)
- .first_defined_crate = the lang item is first defined in crate `{$orig_crate_name}`.
+ .first_defined_crate = the lang item is first defined in crate `{$orig_crate_name}`
  .first_definition_local = first definition in the local crate (`{$orig_crate_name}`)
  .second_definition_local = second definition in the local crate (`{$crate_name}`)
  .first_definition_path = first definition in `{$orig_crate_name}` loaded from {$orig_path}
@@ -315,7 +315,7 @@ passes_ffi_pure_invalid_target =
  `#[ffi_pure]` may only be used on foreign functions
 
 passes_has_incoherent_inherent_impl =
- `rustc_has_incoherent_inherent_impls` attribute should be applied to types or traits.
+ `rustc_has_incoherent_inherent_impls` attribute should be applied to types or traits
  .label = only adts, extern types and traits are supported
 
 passes_ignored_attr =

compiler/rustc_resolve/messages.ftl

@@ -240,7 +240,7 @@ resolve_label_with_similar_name_reachable =
 
 resolve_lending_iterator_report_error =
  associated type `Iterator::Item` is declared without lifetime parameters, so using a borrowed type for them requires that lifetime to come from the implemented type
- .note = you can't create an `Iterator` that borrows each `Item` from itself, but you can instead create a new type that borrows your existing type and implement `Iterator` for that new type.
+ .note = you can't create an `Iterator` that borrows each `Item` from itself, but you can instead create a new type that borrows your existing type and implement `Iterator` for that new type
 
 resolve_lifetime_param_in_enum_discriminant =
  lifetime parameters may not be used in enum discriminant values

compiler/rustc_session/messages.ftl

@@ -82,9 +82,9 @@ session_octal_float_literal_not_supported = octal float literal is not supported
 
 session_optimization_fuel_exhausted = optimization-fuel-exhausted: {$msg}
 
-session_profile_sample_use_file_does_not_exist = file `{$path}` passed to `-C profile-sample-use` does not exist.
+session_profile_sample_use_file_does_not_exist = file `{$path}` passed to `-C profile-sample-use` does not exist
 
-session_profile_use_file_does_not_exist = file `{$path}` passed to `-C profile-use` does not exist.
+session_profile_use_file_does_not_exist = file `{$path}` passed to `-C profile-use` does not exist
 
 session_sanitizer_cfi_canonical_jump_tables_requires_cfi = `-Zsanitizer-cfi-canonical-jump-tables` requires `-Zsanitizer=cfi`
 

src/tools/tidy/Cargo.toml

@@ -13,6 +13,7 @@ ignore = "0.4.18"
 semver = "1.0"
 termcolor = "1.1.3"
 rustc-hash = "1.1.0"
+fluent-syntax = "0.11.1"
 
 [[bin]]
 name = "rust-tidy"

src/tools/tidy/src/fluent_period.rs

@@ -0,0 +1,84 @@
+//! Checks that no Fluent messages or attributes end in periods (except ellipses)
+
+use fluent_syntax::ast::{Entry, PatternElement};
+
+use crate::walk::{filter_dirs, walk};
+use std::path::Path;
+
+fn filter_fluent(path: &Path) -> bool {
+ if let Some(ext) = path.extension() { ext.to_str() != Some("ftl") } else { true }
+}
+
+/// Messages allowed to have `.` at their end.
+///
+/// These should probably be reworked eventually.
+const ALLOWLIST: &[&str] = &[
+ "const_eval_long_running",
+ "const_eval_validation_failure_note",
+ "driver_impl_ice",
+ "incremental_corrupt_file",
+ "mir_build_pointer_pattern",
+];
+
+fn check_period(filename: &str, contents: &str, bad: &mut bool) {
+ if filename.contains("codegen") {
+ // FIXME: Too many codegen messages have periods right now...
+ return;
+ }
+
+ let (Ok(parse) | Err((parse, _))) = fluent_syntax::parser::parse(contents);
+ for entry in &parse.body {
+ if let Entry::Message(m) = entry {
+ if ALLOWLIST.contains(&m.id.name) {
+ continue;
+ }
+
+ if let Some(pat) = &m.value {
+ if let Some(PatternElement::TextElement { value }) = pat.elements.last() {
+ // We don't care about ellipses.
+ if value.ends_with(".") && !value.ends_with("...") {
+ let ll = find_line(contents, *value);
+ let name = m.id.name;
+ tidy_error!(bad, "{filename}:{ll}: message `{name}` ends in a period");
+ }
+ }
+ }
+
+ for attr in &m.attributes {
+ // Teach notes usually have long messages.
+ if attr.id.name == "teach_note" {
+ continue;
+ }
+
+ if let Some(PatternElement::TextElement { value }) = attr.value.elements.last() {
+ if value.ends_with(".") && !value.ends_with("...") {
+ let ll = find_line(contents, *value);
+ let name = attr.id.name;
+ tidy_error!(bad, "{filename}:{ll}: attr `{name}` ends in a period");
+ }
+ }
+ }
+ }
+ }
+}
+
+/// Evil cursed bad hack. Requires that `value` be a substr (in memory) of `contents`.
+fn find_line(haystack: &str, needle: &str) -> usize {
+ for (ll, line) in haystack.lines().enumerate() {
+ if line.as_ptr() > needle.as_ptr() {
+ return ll;
+ }
+ }
+
+ 1
+}
+
+pub fn check(path: &Path, bad: &mut bool) {
+ walk(
+ path,
+ |path, is_dir| filter_dirs(path) || (!is_dir && filter_fluent(path)),
+ &mut |ent, contents| {
+ check_period(ent.path().to_str().unwrap(), contents, bad);
+ },
+ );
+}

src/tools/tidy/src/lib.rs

@@ -72,6 +72,7 @@ pub mod ext_tool_checks;
 pub mod extdeps;
 pub mod features;
 pub mod fluent_alphabetical;
+pub mod fluent_period;
 mod fluent_used;
 pub(crate) mod iter_header;
 pub mod known_bug;

src/tools/tidy/src/main.rs

@@ -115,6 +115,7 @@ fn main() {
  // Checks that only make sense for the compiler.
  check!(error_codes, &root_path, &[&compiler_path, &librustdoc_path], verbose);
  check!(fluent_alphabetical, &compiler_path, bless);
+ check!(fluent_period, &compiler_path);
  check!(target_policy, &root_path);
 
  // Checks that only make sense for the std libs.

tests/ui/abi/abi-typo-unstable.stderr

@@ -4,7 +4,7 @@ error[E0703]: invalid ABI: found `rust-intrinsec`
 LL | extern "rust-intrinsec" fn rust_intrinsic() {}
  | ^^^^^^^^^^^^^^^^ invalid ABI
  |
- = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions.
+ = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions
 
 error: aborting due to 1 previous error
 

tests/ui/abi/riscv-discoverability-guidance.riscv32.stderr

@@ -7,7 +7,7 @@ LL | extern "riscv-interrupt" fn isr() {}
  | invalid ABI
  | help: did you mean: `"riscv-interrupt-m"`
  |
- = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions.
+ = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions
  = note: please use one of riscv-interrupt-m or riscv-interrupt-s for machine- or supervisor-level interrupts, respectively
 
 error[E0703]: invalid ABI: found `riscv-interrupt-u`
@@ -19,7 +19,7 @@ LL | extern "riscv-interrupt-u" fn isr_U() {}
  | invalid ABI
  | help: did you mean: `"riscv-interrupt-m"`
  |
- = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions.
+ = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions
  = note: user-mode interrupt handlers have been removed from LLVM pending standardization, see: https://reviews.llvm.org/D149314
 
 error: aborting due to 2 previous errors

tests/ui/abi/riscv-discoverability-guidance.riscv64.stderr

@@ -7,7 +7,7 @@ LL | extern "riscv-interrupt" fn isr() {}
  | invalid ABI
  | help: did you mean: `"riscv-interrupt-m"`
  |
- = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions.
+ = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions
  = note: please use one of riscv-interrupt-m or riscv-interrupt-s for machine- or supervisor-level interrupts, respectively
 
 error[E0703]: invalid ABI: found `riscv-interrupt-u`
@@ -19,7 +19,7 @@ LL | extern "riscv-interrupt-u" fn isr_U() {}
  | invalid ABI
  | help: did you mean: `"riscv-interrupt-m"`
  |
- = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions.
+ = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions
  = note: user-mode interrupt handlers have been removed from LLVM pending standardization, see: https://reviews.llvm.org/D149314
 
 error: aborting due to 2 previous errors

tests/ui/codemap_tests/unicode.normal.stderr

@@ -4,7 +4,7 @@ error[E0703]: invalid ABI: found `路濫狼á́́`
 LL | extern "路濫狼á́́" fn foo() {}
  | ^^^^^^^^^ invalid ABI
  |
- = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions.
+ = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions
 
 error: aborting due to 1 previous error
 

tests/ui/error-codes/E0116.stderr

@@ -2,7 +2,7 @@ error[E0116]: cannot define inherent `impl` for a type outside of the crate wher
  --> $DIR/E0116.rs:1:1
  |
 LL | impl Vec<u8> {}
- | ^^^^^^^^^^^^ impl for type defined outside of crate.
+ | ^^^^^^^^^^^^ impl for type defined outside of crate
  |
  = note: define and implement a trait or new type instead
 

tests/ui/error-codes/E0519.stderr

@@ -1,4 +1,4 @@
-error[E0519]: the current crate is indistinguishable from one of its dependencies: it has the same crate-name `crateresolve1` and was compiled with the same `-C metadata` arguments. This will result in symbol conflicts between the two.
+error[E0519]: the current crate is indistinguishable from one of its dependencies: it has the same crate-name `crateresolve1` and was compiled with the same `-C metadata` arguments, so this will result in symbol conflicts between the two
  --> $DIR/E0519.rs:8:1
  |
 LL | extern crate crateresolve1;

tests/ui/feature-gates/issue-43106-gating-of-builtin-attrs.stderr

@@ -186,15 +186,15 @@ warning: unknown lint: `x5100`
 LL | #[deny(x5100)] impl S { }
  | ^^^^^
 
-warning: use of deprecated attribute `crate_id`: no longer used.
+warning: use of deprecated attribute `crate_id`: no longer used
  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:84:1
  |
 LL | #![crate_id = "10"]
  | ^^^^^^^^^^^^^^^^^^^ help: remove this attribute
  |
  = note: `#[warn(deprecated)]` on by default
 
-warning: use of deprecated attribute `no_start`: no longer used.
+warning: use of deprecated attribute `no_start`: no longer used
  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:94:1
  |
 LL | #![no_start]