Integrate initial OSS-Fuzz support (#5850)

Author: initializedd

Diff for: fuzz/Cargo.lock

@@ -0,0 +1,22 @@
+[package]
+name = "fuzz"
+version = "0.0.0"
+edition = "2021"
+publish = false
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4.8"
+clap = { path = "../", version = "4.5.20", features = ["derive"] }
+
+# Prevent this from interfering with workspaces
+[workspace]
+
+[[bin]]
+name = "parse_fuzzer"
+path = "fuzz_targets/parse_fuzzer.rs"
+test = false
+doc = false
+

Diff for: fuzz/Cargo.toml

@@ -0,0 +1,17 @@
+#![no_main]
+
+use libfuzzer_sys::fuzz_target;
+use clap::Parser;
+
+#[derive(Parser)]
+struct Args {
+    #[arg(short, long)]
+    test: String
+}
+
+fuzz_target!(|data: &[u8]| {
+    if let Ok(s) = String::from_utf8(data.to_vec()) {
+        let _ = Args::try_parse_from(vec![s]);
+    }
+});
+