afl: add main file

for testing that crashes have been resolved

previously, binary of the main crate was used, but targets may have more
validation than simply checking for panics

Makefile

@@ -78,13 +78,12 @@ afl_quick:
 afl_crash:
 	set +e; \
 	for f in $$(find tests/afl/out -path '*/${AFL_TARGET_CRASH}/id*'); do \
-		echo "cat $$f | RUST_BACKTRACE=1 cargo run"; \
-		out=$$(cat $$f | RUST_BACKTRACE=1 cargo run 2>&1); \
+		echo $$f; \
+		out=$$(cat $$f | (cd tests/afl && RUST_BACKTRACE=1 cargo run ${AFL_TARGET} 2>&1)); \
 		if [ $$? -ne 0 ]; then \
 			echo; \
 			echo "FAIL"; \
 			echo "$$out"; \
-			echo "cat $$f | RUST_BACKTRACE=1 cargo run"; \
 			exit 1; \
 		fi; \
 	done

tests/afl/Cargo.toml

@@ -2,11 +2,16 @@
 name = "jotdown-afl"
 version = "0.1.0"
 edition = "2021"
+default-run = "main"
 
 [dependencies]
 afl = "0.11"
 jotdown = { path = "../../", features = ["deterministic"] }
 
+[[bin]]
+name = "main"
+path = "src/main.rs"
+
 [[bin]]
 name = "parse"
 path = "src/parse.rs"

tests/afl/src/main.rs

@@ -0,0 +1,17 @@
+use std::io::Read;
+
+fn main() {
+    let mut args = std::env::args();
+    let _program = args.next();
+    let target = args.next().expect("no target");
+    assert_eq!(args.next(), None);
+
+    let f = match target.as_str() {
+        "parse" => jotdown_afl::parse,
+        _ => panic!("unknown target '{}'", target),
+    };
+
+    let mut input = Vec::new();
+    std::io::stdin().read_to_end(&mut input).unwrap();
+    f(&input);
+}