1 files changed, 55 insertions, 0 deletions
diff --git a/vendor/unified-diff/src/main.rs b/vendor/unified-diff/src/main.rs
new file mode 100644
index 000000000..16ff8e228
--- /dev/null
+++ b/vendor/unified-diff/src/main.rs
@@ -0,0 +1,55 @@
+// Sample program. Do not use.
+use std::env;
+use std::fs;
+use std::io::{self, Write};
+use std::process;
+fn main() {
+    let mut o = env::args_os();
+    // parse CLI
+    let exe = match o.next() {
+        Some(from) => from,
+        None => {
+            eprintln!("Usage: [exe] [from] [to]");
+            process::exit(1);
+        }
+    };
+    let from = match o.next() {
+        Some(from) => from,
+        None => {
+            eprintln!("Usage: {} [from] [to]", exe.to_string_lossy());
+            process::exit(1);
+        }
+    };
+    let to = match o.next() {
+        Some(from) => from,
+        None => {
+            eprintln!("Usage: {} [from] [to]", exe.to_string_lossy());
+            process::exit(1);
+        }
+    };
+    // read files
+    let from_content = match fs::read(&from) {
+        Ok(from_content) => from_content,
+        Err(e) => {
+            eprintln!("Failed to read from-file: {}", e);
+            process::exit(2);
+        }
+    };
+    let to_content = match fs::read(&to) {
+        Ok(to_content) => to_content,
+        Err(e) => {
+            eprintln!("Failed to read to-file: {}", e);
+            process::exit(2);
+        }
+    };
+    // run diff
+    io::stdout()
+        .write_all(&unified_diff::diff(
+            &from_content,
+            &from.to_string_lossy(),
+            &to_content,
+            &to.to_string_lossy(),
+            1,
+        ))
+        .unwrap();
+}