1 files changed, 44 insertions, 0 deletions
diff --git a/src/tools/cargo/crates/rustfix/examples/fix-json.rs b/src/tools/cargo/crates/rustfix/examples/fix-json.rs
new file mode 100644
index 000000000..676171106
--- /dev/null
+++ b/src/tools/cargo/crates/rustfix/examples/fix-json.rs
@@ -0,0 +1,44 @@
+#![allow(clippy::disallowed_methods, clippy::print_stdout, clippy::print_stderr)]
+
+use anyhow::Error;
+use std::io::{stdin, BufReader, Read};
+use std::{collections::HashMap, collections::HashSet, env, fs};
+
+fn main() -> Result<(), Error> {
+    let suggestions_file = env::args().nth(1).expect("USAGE: fix-json <file or -->");
+    let suggestions = if suggestions_file == "--" {
+        let mut buffer = String::new();
+        BufReader::new(stdin()).read_to_string(&mut buffer)?;
+        buffer
+    } else {
+        fs::read_to_string(&suggestions_file)?
+    };
+    let suggestions = rustfix::get_suggestions_from_json(
+        &suggestions,
+        &HashSet::new(),
+        rustfix::Filter::Everything,
+    )?;
+
+    let mut files = HashMap::new();
+    for suggestion in suggestions {
+        let file = suggestion.solutions[0].replacements[0]
+            .snippet
+            .file_name
+            .clone();
+        files.entry(file).or_insert_with(Vec::new).push(suggestion);
+    }
+
+    for (source_file, suggestions) in &files {
+        let source = fs::read_to_string(source_file)?;
+        let mut fix = rustfix::CodeFix::new(&source);
+        for suggestion in suggestions.iter().rev() {
+            if let Err(e) = fix.apply(suggestion) {
+                eprintln!("Failed to apply suggestion to {}: {}", source_file, e);
+            }
+        }
+        let fixes = fix.finish()?;
+        fs::write(source_file, fixes)?;
+    }
+
+    Ok(())
+}