New internal lint to make clippy::version attribute mandatory

clippy_lints/src/lib.register_internal.rs

@@ -13,6 +13,7 @@ store.register_group(true, "clippy::internal", Some("clippy_internal"), vec![
     LintId::of(utils::internal_lints::INVALID_PATHS),
     LintId::of(utils::internal_lints::LINT_WITHOUT_LINT_PASS),
     LintId::of(utils::internal_lints::MATCH_TYPE_ON_DIAGNOSTIC_ITEM),
+    LintId::of(utils::internal_lints::MISSING_CLIPPY_VERSION_ATTRIBUTE),
     LintId::of(utils::internal_lints::OUTER_EXPN_EXPN_DATA),
     LintId::of(utils::internal_lints::PRODUCE_ICE),
     LintId::of(utils::internal_lints::UNNECESSARY_SYMBOL_STR),

clippy_lints/src/lib.register_lints.rs

@@ -24,6 +24,8 @@ store.register_lints(&[
     #[cfg(feature = "internal-lints")]
     utils::internal_lints::MATCH_TYPE_ON_DIAGNOSTIC_ITEM,
     #[cfg(feature = "internal-lints")]
+    utils::internal_lints::MISSING_CLIPPY_VERSION_ATTRIBUTE,
+    #[cfg(feature = "internal-lints")]
     utils::internal_lints::OUTER_EXPN_EXPN_DATA,
     #[cfg(feature = "internal-lints")]
     utils::internal_lints::PRODUCE_ICE,

clippy_lints/src/lib.rs

@@ -153,6 +153,10 @@ macro_rules! declare_clippy_lint {
 
 #[cfg(feature = "metadata-collector-lint")]
 mod deprecated_lints;
+#[cfg_attr(
+    any(feature = "internal-lints", feature = "metadata-collector-lint"),
+    allow(clippy::missing_clippy_version_attribute)
+)]
 mod utils;
 
 // begin lints modules, do not remove this comment, it’s used in `update_lints`

clippy_lints/src/utils/internal_lints.rs

@@ -328,6 +328,15 @@ declare_clippy_lint! {
     "found an invalid `clippy::version` attribute"
 }
 
+declare_clippy_lint! {
+    /// ### What it does
+    /// Checks for declared clippy lints without the `clippy::version` attribute.
+    ///
+    pub MISSING_CLIPPY_VERSION_ATTRIBUTE,
+    internal,
+    "found clippy lint without `clippy::version` attribute"
+}
+
 declare_lint_pass!(ClippyLintsInternal => [CLIPPY_LINTS_INTERNAL]);
 
 impl EarlyLintPass for ClippyLintsInternal {
@@ -365,7 +374,7 @@ pub struct LintWithoutLintPass {
     registered_lints: FxHashSet<Symbol>,
 }
 
-impl_lint_pass!(LintWithoutLintPass => [DEFAULT_LINT, LINT_WITHOUT_LINT_PASS, INVALID_CLIPPY_VERSION_ATTRIBUTE]);
+impl_lint_pass!(LintWithoutLintPass => [DEFAULT_LINT, LINT_WITHOUT_LINT_PASS, INVALID_CLIPPY_VERSION_ATTRIBUTE, MISSING_CLIPPY_VERSION_ATTRIBUTE]);
 
 impl<'tcx> LateLintPass<'tcx> for LintWithoutLintPass {
     fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) {
@@ -492,6 +501,15 @@ fn check_invalid_clippy_version_attribute(cx: &LateContext<'_>, item: &'_ Item<'
                 "please use a valid sematic version, see `doc/adding_lints.md`",
             );
         }
+    } else {
+        span_lint_and_help(
+            cx,
+            MISSING_CLIPPY_VERSION_ATTRIBUTE,
+            item.span,
+            "this lint is missing the `clippy::version` attribute or version value",
+            None,
+            "please use a `clippy::version` attribute, see `doc/adding_lints.md`",
+        );
     }
 }
 

tests/ui-internal/check_clippy_version_attribute.rs

@@ -54,16 +54,34 @@ declare_tool_lint! {
 }
 
 ///////////////////////
-// Ignored attributes
+// Missing attribute test
 ///////////////////////
 declare_tool_lint! {
     #[clippy::version]
-    pub clippy::IGNORED_ONE,
+    pub clippy::MISSING_ATTRIBUTE_ONE,
     Warn,
-    "ONE",
+    "Two",
     report_in_external_macro: true
 }
 
-declare_lint_pass!(Pass2 => [VALID_ONE, VALID_TWO, VALID_THREE, INVALID_ONE, INVALID_TWO, IGNORED_ONE]);
+declare_tool_lint! {
+    pub clippy::MISSING_ATTRIBUTE_TWO,
+    Warn,
+    "Two",
+    report_in_external_macro: true
+}
+
+#[allow(clippy::missing_clippy_version_attribute)]
+mod internal_clippy_lints {
+    declare_tool_lint! {
+        pub clippy::ALLOW_MISSING_ATTRIBUTE_ONE,
+        Warn,
+        "Two",
+        report_in_external_macro: true
+    }
+}
+
+use crate::internal_clippy_lints::ALLOW_MISSING_ATTRIBUTE_ONE;
+declare_lint_pass!(Pass2 => [VALID_ONE, VALID_TWO, VALID_THREE, INVALID_ONE, INVALID_TWO, MISSING_ATTRIBUTE_ONE, MISSING_ATTRIBUTE_TWO, ALLOW_MISSING_ATTRIBUTE_ONE]);
 
 fn main() {}

tests/ui-internal/check_clippy_version_attribute.stderr

@@ -34,5 +34,40 @@ LL | | }
    = help: please use a valid sematic version, see `doc/adding_lints.md`
    = note: this error originates in the macro `$crate::declare_tool_lint` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: aborting due to 2 previous errors
+error: this lint is missing the `clippy::version` attribute or version value
+  --> $DIR/check_clippy_version_attribute.rs:59:1
+   |
+LL | / declare_tool_lint! {
+LL | |     #[clippy::version]
+LL | |     pub clippy::MISSING_ATTRIBUTE_ONE,
+LL | |     Warn,
+LL | |     "Two",
+LL | |     report_in_external_macro: true
+LL | | }
+   | |_^
+   |
+note: the lint level is defined here
+  --> $DIR/check_clippy_version_attribute.rs:1:9
+   |
+LL | #![deny(clippy::internal)]
+   |         ^^^^^^^^^^^^^^^^
+   = note: `#[deny(clippy::missing_clippy_version_attribute)]` implied by `#[deny(clippy::internal)]`
+   = help: please use a `clippy::version` attribute, see `doc/adding_lints.md`
+   = note: this error originates in the macro `$crate::declare_tool_lint` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: this lint is missing the `clippy::version` attribute or version value
+  --> $DIR/check_clippy_version_attribute.rs:67:1
+   |
+LL | / declare_tool_lint! {
+LL | |     pub clippy::MISSING_ATTRIBUTE_TWO,
+LL | |     Warn,
+LL | |     "Two",
+LL | |     report_in_external_macro: true
+LL | | }
+   | |_^
+   |
+   = help: please use a `clippy::version` attribute, see `doc/adding_lints.md`
+   = note: this error originates in the macro `$crate::declare_tool_lint` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: aborting due to 4 previous errors
 

tests/ui-internal/collapsible_span_lint_calls.fixed

@@ -1,5 +1,6 @@
 // run-rustfix
 #![deny(clippy::internal)]
+#![allow(clippy::missing_clippy_version_attribute)]
 #![feature(rustc_private)]
 
 extern crate clippy_utils;

tests/ui-internal/collapsible_span_lint_calls.rs

@@ -1,5 +1,6 @@
 // run-rustfix
 #![deny(clippy::internal)]
+#![allow(clippy::missing_clippy_version_attribute)]
 #![feature(rustc_private)]
 
 extern crate clippy_utils;

tests/ui-internal/collapsible_span_lint_calls.stderr

@@ -1,5 +1,5 @@
 error: this call is collapsible
-  --> $DIR/collapsible_span_lint_calls.rs:35:9
+  --> $DIR/collapsible_span_lint_calls.rs:36:9
    |
 LL | /         span_lint_and_then(cx, TEST_LINT, expr.span, lint_msg, |db| {
 LL | |             db.span_suggestion(expr.span, help_msg, sugg.to_string(), Applicability::MachineApplicable);
@@ -14,31 +14,31 @@ LL | #![deny(clippy::internal)]
    = note: `#[deny(clippy::collapsible_span_lint_calls)]` implied by `#[deny(clippy::internal)]`
 
 error: this call is collapsible
-  --> $DIR/collapsible_span_lint_calls.rs:38:9
+  --> $DIR/collapsible_span_lint_calls.rs:39:9
    |
 LL | /         span_lint_and_then(cx, TEST_LINT, expr.span, lint_msg, |db| {
 LL | |             db.span_help(expr.span, help_msg);
 LL | |         });
    | |__________^ help: collapse into: `span_lint_and_help(cx, TEST_LINT, expr.span, lint_msg, Some(expr.span), help_msg)`
 
 error: this call is collapsible
-  --> $DIR/collapsible_span_lint_calls.rs:41:9
+  --> $DIR/collapsible_span_lint_calls.rs:42:9
    |
 LL | /         span_lint_and_then(cx, TEST_LINT, expr.span, lint_msg, |db| {
 LL | |             db.help(help_msg);
 LL | |         });
    | |__________^ help: collapse into: `span_lint_and_help(cx, TEST_LINT, expr.span, lint_msg, None, help_msg)`
 
 error: this call is collspible
-  --> $DIR/collapsible_span_lint_calls.rs:44:9
+  --> $DIR/collapsible_span_lint_calls.rs:45:9
    |
 LL | /         span_lint_and_then(cx, TEST_LINT, expr.span, lint_msg, |db| {
 LL | |             db.span_note(expr.span, note_msg);
 LL | |         });
    | |__________^ help: collapse into: `span_lint_and_note(cx, TEST_LINT, expr.span, lint_msg, Some(expr.span), note_msg)`
 
 error: this call is collspible
-  --> $DIR/collapsible_span_lint_calls.rs:47:9
+  --> $DIR/collapsible_span_lint_calls.rs:48:9
    |
 LL | /         span_lint_and_then(cx, TEST_LINT, expr.span, lint_msg, |db| {
 LL | |             db.note(note_msg);

tests/ui-internal/custom_ice_message.rs

@@ -4,6 +4,7 @@
 // normalize-stderr-test: "', .*clippy_lints" -> "', clippy_lints"
 
 #![deny(clippy::internal)]
+#![allow(clippy::missing_clippy_version_attribute)]
 
 fn it_looks_like_you_are_trying_to_kill_clippy() {}
 

tests/ui-internal/default_lint.rs

@@ -1,4 +1,5 @@
 #![deny(clippy::internal)]
+#![allow(clippy::missing_clippy_version_attribute)]
 #![feature(rustc_private)]
 
 #[macro_use]

tests/ui-internal/default_lint.stderr

@@ -1,5 +1,5 @@
 error: the lint `TEST_LINT_DEFAULT` has the default lint description
-  --> $DIR/default_lint.rs:17:1
+  --> $DIR/default_lint.rs:18:1
    |
 LL | / declare_tool_lint! {
 LL | |     pub clippy::TEST_LINT_DEFAULT,

tests/ui-internal/if_chain_style.rs

@@ -1,5 +1,5 @@
 #![warn(clippy::if_chain_style)]
-#![allow(clippy::no_effect, clippy::nonminimal_bool)]
+#![allow(clippy::no_effect, clippy::nonminimal_bool, clippy::missing_clippy_version_attribute)]
 
 extern crate if_chain;
 

tests/ui-internal/interning_defined_symbol.fixed

@@ -1,5 +1,6 @@
 // run-rustfix
 #![deny(clippy::internal)]
+#![allow(clippy::missing_clippy_version_attribute)]
 #![feature(rustc_private)]
 
 extern crate rustc_span;

tests/ui-internal/interning_defined_symbol.rs

@@ -1,5 +1,6 @@
 // run-rustfix
 #![deny(clippy::internal)]
+#![allow(clippy::missing_clippy_version_attribute)]
 #![feature(rustc_private)]
 
 extern crate rustc_span;

tests/ui-internal/interning_defined_symbol.stderr

@@ -1,5 +1,5 @@
 error: interning a defined symbol
-  --> $DIR/interning_defined_symbol.rs:17:13
+  --> $DIR/interning_defined_symbol.rs:18:13
    |
 LL |     let _ = Symbol::intern("f32");
    |             ^^^^^^^^^^^^^^^^^^^^^ help: try: `rustc_span::sym::f32`
@@ -12,19 +12,19 @@ LL | #![deny(clippy::internal)]
    = note: `#[deny(clippy::interning_defined_symbol)]` implied by `#[deny(clippy::internal)]`
 
 error: interning a defined symbol
-  --> $DIR/interning_defined_symbol.rs:20:13
+  --> $DIR/interning_defined_symbol.rs:21:13
    |
 LL |     let _ = sym!(f32);
    |             ^^^^^^^^^ help: try: `rustc_span::sym::f32`
 
 error: interning a defined symbol
-  --> $DIR/interning_defined_symbol.rs:23:13
+  --> $DIR/interning_defined_symbol.rs:24:13
    |
 LL |     let _ = Symbol::intern("proc-macro");
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `rustc_span::sym::proc_dash_macro`
 
 error: interning a defined symbol
-  --> $DIR/interning_defined_symbol.rs:26:13
+  --> $DIR/interning_defined_symbol.rs:27:13
    |
 LL |     let _ = Symbol::intern("self");
    |             ^^^^^^^^^^^^^^^^^^^^^^ help: try: `rustc_span::symbol::kw::SelfLower`

tests/ui-internal/invalid_paths.rs

@@ -1,4 +1,5 @@
 #![warn(clippy::internal)]
+#![allow(clippy::missing_clippy_version_attribute)]
 
 mod paths {
     // Good path

tests/ui-internal/invalid_paths.stderr

@@ -1,13 +1,13 @@
 error: invalid path
-  --> $DIR/invalid_paths.rs:17:5
+  --> $DIR/invalid_paths.rs:18:5
    |
 LL |     pub const BAD_CRATE_PATH: [&str; 2] = ["bad", "path"];
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: `-D clippy::invalid-paths` implied by `-D warnings`
 
 error: invalid path
-  --> $DIR/invalid_paths.rs:20:5
+  --> $DIR/invalid_paths.rs:21:5
    |
 LL |     pub const BAD_MOD_PATH: [&str; 2] = ["std", "xxx"];
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tests/ui-internal/lint_without_lint_pass.rs

@@ -1,4 +1,5 @@
 #![deny(clippy::internal)]
+#![allow(clippy::missing_clippy_version_attribute)]
 #![feature(rustc_private)]
 
 #[macro_use]

tests/ui-internal/lint_without_lint_pass.stderr

@@ -1,5 +1,5 @@
 error: the lint `TEST_LINT` is not added to any `LintPass`
-  --> $DIR/lint_without_lint_pass.rs:11:1
+  --> $DIR/lint_without_lint_pass.rs:12:1
    |
 LL | / declare_tool_lint! {
 LL | |     pub clippy::TEST_LINT,

tests/ui-internal/match_type_on_diag_item.rs

@@ -1,4 +1,5 @@
 #![deny(clippy::internal)]
+#![allow(clippy::missing_clippy_version_attribute)]
 #![feature(rustc_private)]
 
 extern crate clippy_utils;

tests/ui-internal/match_type_on_diag_item.stderr

@@ -1,5 +1,5 @@
 error: usage of `clippy_utils::ty::match_type()` on a type diagnostic item
-  --> $DIR/match_type_on_diag_item.rs:30:17
+  --> $DIR/match_type_on_diag_item.rs:31:17
    |
 LL |         let _ = match_type(cx, ty, &OPTION);
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `clippy_utils::ty::is_type_diagnostic_item(cx, ty, sym::Option)`
@@ -12,13 +12,13 @@ LL | #![deny(clippy::internal)]
    = note: `#[deny(clippy::match_type_on_diagnostic_item)]` implied by `#[deny(clippy::internal)]`
 
 error: usage of `clippy_utils::ty::match_type()` on a type diagnostic item
-  --> $DIR/match_type_on_diag_item.rs:31:17
+  --> $DIR/match_type_on_diag_item.rs:32:17
    |
 LL |         let _ = match_type(cx, ty, &["core", "result", "Result"]);
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `clippy_utils::ty::is_type_diagnostic_item(cx, ty, sym::Result)`
 
 error: usage of `clippy_utils::ty::match_type()` on a type diagnostic item
-  --> $DIR/match_type_on_diag_item.rs:34:17
+  --> $DIR/match_type_on_diag_item.rs:35:17
    |
 LL |         let _ = clippy_utils::ty::match_type(cx, ty, rc_path);
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `clippy_utils::ty::is_type_diagnostic_item(cx, ty, sym::Rc)`

tests/ui-internal/outer_expn_data.fixed

@@ -1,6 +1,7 @@
 // run-rustfix
 
 #![deny(clippy::internal)]
+#![allow(clippy::missing_clippy_version_attribute)]
 #![feature(rustc_private)]
 
 extern crate rustc_hir;

tests/ui-internal/outer_expn_data.rs

@@ -1,6 +1,7 @@
 // run-rustfix
 
 #![deny(clippy::internal)]
+#![allow(clippy::missing_clippy_version_attribute)]
 #![feature(rustc_private)]
 
 extern crate rustc_hir;

tests/ui-internal/outer_expn_data.stderr

@@ -1,5 +1,5 @@
 error: usage of `outer_expn().expn_data()`
-  --> $DIR/outer_expn_data.rs:24:34
+  --> $DIR/outer_expn_data.rs:25:34
    |
 LL |         let _ = expr.span.ctxt().outer_expn().expn_data();
    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `outer_expn_data()`

tests/ui-internal/unnecessary_symbol_str.fixed

@@ -1,7 +1,11 @@
 // run-rustfix
 #![feature(rustc_private)]
 #![deny(clippy::internal)]
-#![allow(clippy::unnecessary_operation, unused_must_use)]
+#![allow(
+    clippy::unnecessary_operation,
+    unused_must_use,
+    clippy::missing_clippy_version_attribute
+)]
 
 extern crate rustc_span;
 

tests/ui-internal/unnecessary_symbol_str.rs

@@ -1,7 +1,11 @@
 // run-rustfix
 #![feature(rustc_private)]
 #![deny(clippy::internal)]
-#![allow(clippy::unnecessary_operation, unused_must_use)]
+#![allow(
+    clippy::unnecessary_operation,
+    unused_must_use,
+    clippy::missing_clippy_version_attribute
+)]
 
 extern crate rustc_span;