From eef013859958ffcc4f8693ba0aac9deeed5ee4aa Mon Sep 17 00:00:00 2001
From: Evan Richter <evanjrichter@gmail.com>
Date: Mon, 20 Jun 2022 21:16:02 -0500
Subject: [PATCH] Restore fuzz test harness (#1246)

---
 fuzz/Cargo.lock               | 720 +++++++++++++++++++---------------
 fuzz/Cargo.toml               |  19 +-
 fuzz/fuzz_targets/compile.rs  |   6 +
 fuzz/src/bin/fuzz-compiler.rs |   7 -
 src/fuzzing.rs                |   8 +-
 src/lib.rs                    |   2 +-
 6 files changed, 438 insertions(+), 324 deletions(-)
 create mode 100644 fuzz/fuzz_targets/compile.rs
 delete mode 100644 fuzz/src/bin/fuzz-compiler.rs

diff --git a/fuzz/Cargo.lock b/fuzz/Cargo.lock
index 13d04c8a..52411ee8 100644
--- a/fuzz/Cargo.lock
+++ b/fuzz/Cargo.lock
@@ -1,560 +1,666 @@
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-"checksum regex 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "2069749032ea3ec200ca51e4a31df41759190a88edca0d2d86ee8bedf7073341"
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-"checksum rustc-demangle 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "bcfe5b13211b4d78e5c2cadfebd7769197d95c639c35a50057eb4c05de811395"
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+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
index 11bca1aa..92503557 100644
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -1,5 +1,5 @@
 [package]
-name    = "just-fuzz"
+name = "just-fuzz"
 version = "0.0.0"
 authors = ["Automatically generated"]
 publish = false
@@ -8,8 +8,21 @@ edition = "2018"
 [package.metadata]
 cargo-fuzz = true
 
+[dependencies]
+libfuzzer-sys = "0.4"
+
 [dependencies.just]
 path = ".."
 
-[dependencies.libfuzzer-sys]
-git = "https://github.com/rust-fuzz/libfuzzer-sys.git"
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[[bin]]
+name = "compile"
+path = "fuzz_targets/compile.rs"
+test = false
+doc = false
+
+[profile.release]
+debug = true
diff --git a/fuzz/fuzz_targets/compile.rs b/fuzz/fuzz_targets/compile.rs
new file mode 100644
index 00000000..a6aab904
--- /dev/null
+++ b/fuzz/fuzz_targets/compile.rs
@@ -0,0 +1,6 @@
+#![no_main]
+use libfuzzer_sys::fuzz_target;
+
+fuzz_target!(|src: &str| {
+  let _ = just::fuzzing::compile(src);
+});
diff --git a/fuzz/src/bin/fuzz-compiler.rs b/fuzz/src/bin/fuzz-compiler.rs
deleted file mode 100644
index 180f3652..00000000
--- a/fuzz/src/bin/fuzz-compiler.rs
+++ /dev/null
@@ -1,7 +0,0 @@
-#![no_main]
-
-use libfuzzer_sys::fuzz_target;
-
-fuzz_target!(|data: &[u8]| {
-  std::str::from_utf8(data).map(just::fuzzing::compile).ok();
-});
diff --git a/src/fuzzing.rs b/src/fuzzing.rs
index a1a2c135..4b8884d5 100644
--- a/src/fuzzing.rs
+++ b/src/fuzzing.rs
@@ -1,9 +1,5 @@
 use super::*;
 
-pub(crate) fn compile(text: &str) {
-  if let Err(error) = Parser::parse(text) {
-    if let CompileErrorKind::Internal { .. } = error.kind {
-      panic!("{}", error)
-    }
-  }
+pub fn compile(text: &str) {
+  let _ = compiler::Compiler::compile(text);
 }
diff --git a/src/lib.rs b/src/lib.rs
index 3a11a4f1..284b827d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -104,7 +104,7 @@ pub mod tree;
 pub mod node;
 
 #[cfg(fuzzing)]
-pub(crate) mod fuzzing;
+pub mod fuzzing;
 
 // Used by Janus, https://github.com/casey/janus, a tool
 // that analyses all public justfiles on GitHub to avoid