Exclude reexport imports.

Author: xiongmao86

clippy_lints/src/single_component_path_imports.rs

@@ -22,7 +22,13 @@ declare_clippy_lint! {
     /// fn main() {
     ///     regex::Regex::new(r"^\d{4}-\d{2}-\d{2}$").unwrap();
     /// }
-    ///```
+    /// ```
+    /// Better as
+    /// ```rust, ignore
+    /// fn main() {
+    ///     regex::Regex::new(r"^\d{4}-\d{2}-\d{2}$").unwrap();
+    /// }
+    /// ```
     pub SINGLE_COMPONENT_PATH_IMPORTS,
     style,
     "imports with single component path are redundant"
@@ -34,6 +40,7 @@ impl EarlyLintPass for SingleComponentPathImports {
     fn check_item(&mut self, cx: &EarlyContext<'_>, item: &Item) {
         if_chain! {
             if cx.sess.opts.edition == Edition::Edition2018;
+            if !item.vis.node.is_pub();
             if let ItemKind::Use(use_tree) = &item.kind;
             if let segments = &use_tree.prefix.segments;
             if segments.len() == 1;

tests/ui/single_component_path_imports.fixed

@@ -3,6 +3,8 @@
 #![warn(clippy::single_component_path_imports)]
 
 
+use serde as edres;
+pub use serde;
 
 fn main() {
     regex::Regex::new(r"^\d{4}-\d{2}-\d{2}$").unwrap();

tests/ui/single_component_path_imports.rs

@@ -4,6 +4,7 @@
 
 use regex;
 use serde as edres;
+pub use serde;
 
 fn main() {
     regex::Regex::new(r"^\d{4}-\d{2}-\d{2}$").unwrap();